Heise ST-2H Digital Indicator, GQS-1, GQS-2, GQS-RT RT1, RT2, GQS-TC TC1 Quick Select Module, GQS-XS System Protection Module Operating Manual
Below you will find brief information for Digital Indicator ST-2H, Quick Select Module GQS-1, Quick Select Module GQS-2, Quick Select Module GQS-RT RT1, Quick Select Module GQS-RT RT2, Quick Select Module GQS-TC TC1. The Heise ST-2H Digital Indicator is a modular system for pressure and temperature measurement. The base unit can accept two interchangeable Quick Select modules, which are available in a variety of pressure ranges. The ST-2H system also provides the ability to interface with RTD temperature probes and thermocouples for precision temperature measurement. The ST-2H Digital Indicator is designed to make a variety of measurements, including pressure, temperature, voltage, and current. You can perform measurements of pressure and temperature simultaneously. It is possible to display maximum and minimum values, tare values, and hold values. Additionally, the system has advanced functions, such as leak detection and flow velocity measurement. The Heise ST-2H Digital Indicator is a versatile and accurate instrument that can be used for a variety of measurement and calibration tasks.
Advertisement
Advertisement
ST-2H DIGITAL INDICATOR OPERATING MANUAL REVISION 4.3 3/2004 I&M002-10091-(HST-MAN) 1P6/00 4P7/06 250 SP Thank you for your purchase. Please feel free to contact us if we may be of assistance in any way. Should you require service for this instrument or wish to take advantage of our expert factory recalibration services, please complete the material return form which can be printed directly from the “service” button on the Heise website. Please return the instrument to: Ashcroft Inc. 250 East Main Street Stratford, CT 06614-5145, USA Tel: (203) 378-8281 Fax: (203) 385-0402 For the latest return form and product information, please visit our website at: www.heise.com Table of Contents Section Description 1.0 Introduction ............................................................................................................................... 4 Base Unit Overview ....................................................................................................... Quick Select Module Overview ..................................................................................... The GQS-1 Quick Select Pressure Module ............................................................... The GQS-2 Quick Select Pressure Module ............................................................... The GQS-RT Quick Select RTD Temperature Interface Module .............................. The GQS-TC Quick Select Thermocouple Module .................................................. 4 4 5 5 5 6 2.0 Unpacking .................................................................................................................................. 6 2.1 2.2 2.3 Unpacking Product Upon Receipt .................................................................................. Product Storage .............................................................................................................. Product Cleaning ............................................................................................................ 6 6 6 3.0 System Start-Up General Instructions .................................................................................... 6 1.1 1.2 1.2.1 1.2.2 1.2.3 1.2.4 3.1 3.2 3.3 3.4 3.5 3.5.1 3.5.2 3.5.3 3.5.4 3.5.5 3.6 Page Power Cord Connection ................................................................................................. 6 Battery Installation ......................................................................................................... 6 Installation of Quick Select Modules ............................................................................. 7 Starting Up MDI Indicator System ............................................................................... 8 Optional System Start Up Procedures ............................................................................ 8 Auto Off- Battery Save Function .............................................................................. 9 Battery Life Overview ............................................................................................... 9 Low Battery Icon ....................................................................................................... 9 Programming Date and Time Information ................................................................ 10 Input of Owner/Operator Information ....................................................................... 10 Removing Quick Select Modules ................................................................................... 12 4.0 Key Function Overview ............................................................................................................. 12 5.0 Port Select Function ................................................................................................................. 13 6.0 Zero Function ............................................................................................................................ 13 6.1 Zeroing One of Two Installed Quick Select Pressure Module ....................................... 14 7.0 Displaying Current & Voltage Measurements ......................................................................... 14 8.0 Engineering Unit Selection ....................................................................................................... 14 8.1 8.2 8.3 8.4 8.5 Selecting a Factory Programmed Engineering Unit ....................................................... Setting Up a Custom (User Defined) Engineering Unit ................................................. Using a Custom (User Defined) Engineering Unit......................................................... Display of Two Different Engineering Units, for Two Installed Modules ......................................................................................... Temperature Selection for H2O Conversion Factor ........................................................ 15 15 16 17 18 9.0 Tare Function ............................................................................................................................. 18 10.0 Hold Function ............................................................................................................................ 19 10.1 Using the Hold Function ................................................................................................ 19 11.0 Minimum and Maximum Value Tracking .................................................................................. 19 -3- Revision 4.3 3/2004 Section Description 12.0 Damping Function ..................................................................................................................... 20 12.1 12.2 Set Up of Damping Function ......................................................................................... 20 Activating or Discontinuing Damping ........................................................................... 20 13.0 Percent Function ....................................................................................................................... 21 13.1 13.2 Set Up of Percent Function ............................................................................................ 21 Use of Percent Function ................................................................................................. 22 14.0 Flow Velocity and Flow Volume Measurement Background .................................................. 22 14.1 14.2 14.3 14.4 14.5 14.6 Page Set Up for Flow Velocity & Volume Measurement ........................................................ Flow Velocity Measurement ........................................................................................... Engineering Unit Selection for Flow Velocity ............................................................... Flow Volume Measurement ............................................................................................ Engineering Unit Selection for Flow Volume ................................................................ Simultaneous Display of Two Flow Measurements in Independent Engineering Units ................................................................................. Simultaneous Display of Flow (Velocity or Volume) with a Pressure Measurement .................................................................................... Simultaneous Display of Flow (Velocity or Volume) with a Temperature Measurement ............................................................................. Simultaneous Display of Flow Volume and Flow Velocity ............................................ Simultaneous Display of Flow (Velocity or Volume) and An Electrical Output Measurement ................................................................................. 14.7 14.8 14.9 14.10 23 23 24 24 25 25 26 27 27 28 Leak Detection Function ........................................................................................................... 29 15.0 15.1 15.2 15.3 Leak Rate Function Set Up ............................................................................................ Pressure Decay Function Set Up .................................................................................... Module Selection for Performing Leak Rate or Pressure Decay Tests ................................................................................................................ Performing Leak Rate or Pressure Decay Tests ............................................................. 15.4 29 29 30 30 16.0 Temperature Measurement Using RTD Probes ...................................................................... 31 16.1 16.2 Setting Up the Calibrator for Temperature Measurement with an RTD Probe .................................................................................................... 31 Calibrating and Programming of the RTD Interface and Probe ..................................... 33 17.0 Temperature Measurement Using Thermocouple .................................................................. 33 17.1 Setting Up Calibrator for Temperature Measurement with a thermocouple .................................................................................................. 33 18.0 Pressure and Temperature Switch Testing .............................................................................. 35 18.1 18.2 18.3 Setting Up for Pressure and Temperature Switch Testing .............................................. 35 Trip Point Testing ........................................................................................................... 35 Deadband Testing ........................................................................................................... 36 19.0 RS232 Interface ......................................................................................................................... 37 19.1 19.2 19.2.1 19.2.2 19.2.3 19.2.4 Revision 4.3 Configuring RS232 Interface for Use With Dumb Terminal.......................................... RS232 Configuration Options ........................................................................................ RS232- ISO1745 Mode Functional Overview ......................................................... RS232- Journal Mode Functional Overview ............................................................ RS232- Interface Inquiry Mode Functional Overview .............................................. RS232-Interface Remote Mode Operation ................................................................ 3/2004 -4- 37 37 37 38 38 38 Section Description 19.0 RS232 Interface (Continued) 19.3 19.4 Page RS232 Set Up for Journal Mode Operation ................................................................... 38 RS232 Set Up for Inquiry Mode Operation ................................................................... 40 20.1 20.2 ................................................................................................................................. 41 Reviewing Instrument Status .......................................................................................... 41 Battery Check Function .................................................................................................. 41 21.0 Dual Module Functions ............................................................................................................. 42 21.1 21.2 21.3 Accuracy of Dual Module Measurements ...................................................................... 42 Setting Up Dual Module Differential Pressure Measurement........................................ 43 Setting Up a Dual Module Summation Pressure Measurement ..................................... 44 22.0 22.1 Data Logging Function (Optional) ........................................................................................... 45 20.0 22.2 22.3 22.4 22.5 22.6 22.7 22.8 Status Sequential Data Logging ................................................................................................ Setting Up the Data Logging Function .......................................................................... Data Labeling Function .................................................................................................. Automatic Data Logging ................................................................................................ Manual Data Logging..................................................................................................... Review of Stored Data on display .................................................................................. Erasing of Selected Stored Data ..................................................................................... Erasing All Stored Data .................................................................................................. 45 45 46 46 47 48 49 50 23.0 Data Logging with Cert Generation Firmware ........................................................................ 50 23.1 Set Up and Use of Certification Generation Data Logging ............................................ 50 24.0 Connection of MDI to Computer for Upload of Stored Calibration Data .............................. 55 24.1 24.2 Installing and Operating Upload Software Utilities ....................................................... 56 Replacement of Data Logging Memory Back-up Battery ............................................. 56 25.0 Event Timer Function (Requires Data Logging Option .......................................................... 57 25.1 25.2 Event Timer Set Up ........................................................................................................ 57 Data Logging Set Up for Event Timer Operation .......................................................... 58 26.0 Alarm Function Overview ......................................................................................................... 59 26.1 Alarm Set Up and Operation .......................................................................................... 59 27.0 Recertification of the MDI Indicator ......................................................................................... 60 27.1 27.2 27.3 27.4 27.5 27.6 Access Codes.................................................................................................................. Calibration/Recertification Overview ............................................................................. Required Equipment ....................................................................................................... As Received Readings-Base Unit Electronics ................................................................ Adjustment and Calibration Base Unit Electronics........................................................ Quick Select Pressure Module Recertification ............................................................... 60 61 61 61 62 65 APPENDICES Appendix A – Appendix B – Appendix C – Appendix D – Appendix E – Appendix F – Pressure Conversion Factors ...................................................................................................... ASCII Character Set ..................................................................................................................... Product Specifications ............................................................................................................... Serial Communications – Remote Mode ................................................................................... RTD Probe Connector ................................................................................................................. Certification of the TC1 Thermocouple Interface Module ........................................................ -5- Revision 4.3 69 70 73 76 79 80 3/2004 Section 1.0 Introduction twelve factory programmed or one operator designated engineering unit. Temperature measurement data can be displayed in degrees Celsius, Fahrenheit, Kelvin or Rankine. In addition, when used with the GQS-RT1 Quick Select module for temperature measurement with an RTD temperature probe, the MDI system can display the RTD measurement in ohms. GQS-TC1 modules allow the display of the same temperature units as well as millivolts In addition to displaying two pressure measurements simultaneously the operator can elect to display pressure and temperature or the measured value from either of the two installed Quick Select modules as well as either a voltage or mA measurement. This allows for the easy calibration and test of transducers, transmitters and switches. Congratulations! Your purchase of the Modular Digital Indicator (MDI) calibration system equips you to perform a wide variety of pressure and temperature measurements. The general pressure and temperature measurement capabilities of the MDI measurement system are supplemented by application specific firmware as well as the availability of optional data logging capability. . The MDI products are complete pressure calibration systems providing: interchangeable pressure ranges, simultaneous measurement and display of two pressure ranges, measurement and display of current and voltage. The MDI system also provides the ability to perform high accuracy temperature measurement. Conversion between temperature and pressure measurement can be done in a matter of seconds and requires no tools. The base unit includes a wide variety of general and application specific measurement capabilities. These capabilities allow the MDI measurement and calibration system to be used for basic pressure and temperature measurement as well as application specific pressure measurement activities. Basic pressure and temperature measurement capabilities include; max/min recall, operator programmable tare values, display hold, operator programmable damping and user selected engineering units. Application specific capabilities include; flow velocity measurement, flow volume measurement, leak detection, leak rate quantification and switch testing. Optional data logging, time delayed data logging and programmable alarms are also available. A standard MDI system consists of a base unit that acts as a host for one or two Quick Select modules. The Quick Select pressure modules are interchangeable and are available in a wide variety of ranges from 0.25 inches of water to 10,000 psi. A brief description of the main components of an MDI system follows. In addition, Quick Select modules are available that allow the base unit to work in conjunction with most any standard RTD temperature probe or thermocouple. Section 3 and its various subsections include all the information needed to begin using the MDI system for basic pressure and temperature measurement. Higher level functions are detailed in later sections of this manual. It is strongly recommended that the pertinent sections of this manual be reviewed prior to using the MDI system for higher level and application specific measurement and test activities. Section 1.2 The Quick Select pressure module is a calibrated pressure measurement device. Quick Select pressure module units are available in a wide variety of pressure measurement ranges. Quick Select interface modules are also available to allow the MDI base unit to provide precision temperature measurement data using standard RTD (Resistance Temperature Detector) and thermocouple detector temperature sensing devices. The GQS-RT1 module allows the MDI system to function with most common platinum, nickel and copper RTDs and the GQS-TC supports use of thermocouple temperature detectors. Important: Failure to follow the instructions provided in this manual may result in personal injury and/or damage to the instrument, accessories, products under test or other equipment. Section 1.1 Base Unit Overview The base unit functions as the host for the Quick Select pressure and temperature modules designated in this manual by the “GQS” prefix. Each base unit includes a keypad, microprocessor based electronics and a two line LCD display. The base unit displays the measurement data transmitted from the Quick Select module(s). Measurement outputs from two installed Quick Select modules can be simultaneously displayed. Quick Select modules for the measurement of either pressure or temperature can be plugged into either of the 2 module “bays” in the base unit. Pressure engineering units can be independently selected from the library of Revision 4.3 3/2004 Quick Select ModulesOverview The Quick Select module communicates with the base unit via a 10 pin connector. Quick Select pressure modules slide into the base unit automatically aligning the female 10 pin connector on the Quick Select pressure module with the male 10 pin connector in the base unit. All calibration data is stored in Electrically Erasable Programmable Read Only Memory (EEPROM) resident in the Quick Select module. As such, any Quick Select module can be used in any base unit and the measurement system will provide measurement accuracy in conformance with the published specification. -6- Section 1.2.1 The GQS-1 Quick Select Pressure Module orientation. When positioned in this fashion, the output will be near zero when no pressure (stress) is applied and will increase in a near linear fashion with the application of pressure or vacuum. The reverse side of the substrate is etched to provide the required diaphragm thickness for the given pressure range. GQS-1 Quick Select pressure modules provide specialized low pressure measurement capabilities. GQS-1 Quick Select pressure modules incorporate a micro-machined silicon variable capacitance module. When power is applied to the module the level of resistance across the wheatstone bridge will change in proportion to the level of pressure applied. The output from the module is extremely repeatable and has minimal hysteresis due to the fact that the module substrate is silicon. The module output is then amplified by circuitry within the Quick Select pressure module. The amplified output is then calibrated over the operating range of the module. Calibration coefficients for the module are stored in Electrically Erasable Programmable Read Only Memory (EEPROM) within the Quick Select pressure module. Inside the module there is a micro-machined silicon diaphragm. This diaphragm is between two non-moving plates on which metal has been sputtered. The air between the diaphragm and the non-moving plates acts as an insulator. As pressure or vacuum is applied to the module, the diaphragm moves changing the distance between the diaphragm and the fixed plates. This change in distance changes the capacitance of the module. It is this variable capacitance that is measured and correlated to pressure or vacuum during the calibration process. The module is connected to a circuit board that generates a linear signal ramp and applies this signal to the top plate of the module while an equal and opposite signal is applied to the bottom plate. GQS-2 modules are available in ranges from 5 through 10,000 psi. These modules can be configured to provide gauge, compound or absolute pressure measurement, as well as vacuum measurement capabilities. GQS-2 modules in range of 5 psi are designed for use on clean, dry, noncorrosive and nonconductive gases. 316 stainless steel module isolation is provided for ranges from 0/10 through 0/10,000 psi. When the measured pressure is balanced, for example, when both ports are opened to atmosphere, the distance between the diaphragm and both of the fixed plates is the same. When this is the case, the signal to the top plate is capacitively coupled to the equal and opposite signal applied to the bottom plate. As a result, no signal current will flow through the center plate (diaphragm). When the diaphragm is moved off center by the application of pressure or vacuum, the excess current flows through the center plate to an input differentiator on the circuit board. The differentiator translates the frequency of the module output into a voltage which is scaled over the full scale range of the module. Section 1.2.3 The GQS-RT1 allows the MDI base unit, when used with RTD temperature probes, to provide precision temperature measurement data. The GQS-RT1 plugs directly into the Quick Select module bay in the base unit. Any standard RTD probe with a Switchcraft TA4M connector can be plugged into the Switchcraft TA4F connector on the module. GQS-1 modules are available in ranges from 0.25 inches of water through 200 inches of water. These modules can be configured to provide differential/gauge or compound pressure measurement capabilities. They are designed for use on clean, dry, noncorrosive and nonconductive gases. Section 1.2.2 The GQS-RT Quick Select RTD Interface Module The GQS-RT1 module comes factory programmed with the curves for Pt 100 (385 & 392), Cu 10 and Ni 120 RTD probes. It supports RTDs with outputs in the range of 0/400 ohms. The GQS-RT2 is supplied factory programmed to support the Pt1000 ( 385 & 392) RTD. This module will support RTDs through an output up to 4000 ohms. The GQS-RT module can be programmed with coefficients for other RTD probes of interest and specific characteristics of a probe already included in the on-board library can be programmed into the GQS-RT unit to provide enhanced accuracy. The GQS-2 Quick Select Pressure Module The GQS-2 Quick Select pressure module incorporates a micro-machined piezoresistive strain gauge module. This technology takes advantage of the fact that, when put under stress, (as with the flexing of a diaphragm under pressure or vacuum) the resistive properties of a piece of silicon will change. In the manufacturing process resistors are deposited in a silicon substrate. The resistors are typically configured in a wheatstone bridge Each GQS-RT module can accommodate up to 8 different programmed RTD calibration curves. Programming of the RT module is accomplished via an optional software package and any PC compatible computer with an available standard serial communication port. -7- Revision 4.3 3/2004 Section 1.2.4 The GQS-TC1 Quick Select Thermocouple Interface Module Section 3.1 The MDI system is powered via standard 110 Vac, 60 Hz, 230 Vac, 50 Hz or 100 Vac, 60 Hz line power. The line power is adapted to meet the 9 Vdc power requirements of the MDI system via a standard outlet mounted voltage adapter. The GQS-TC1 allows the base unit, when used with a thermocouple interface module, to perform temperature measurement. The GQS-TC1 plugs directly into the Quick Select module bay in the base unit. The thermocouple is then attactched to the GQS-TC1 module via a male “miniature thermocouple connector.” Section 2.0 The adapter plugs into the round receptacle located in the center of the back panel, over the 9 pin RS232 connector. Unpacking & General Care Step 1 Plug adapter into the receptacle in the center of the back panel of the MDI instrument over the RS 232 connector. General instructions on unpacking and care follow. Section 2.1 Unpacking Product Upon Receipt Step 2 Plug the side with the adapter mounted in the Prior to removing the MDI Digital Indicator System from the packaging material inspect all cartons for shipping damage. Document any damage evident in the event that a damage claim must be made against the shipper. After inspection, remove the base unit, module(s), manual and any accessories purchased from the packaging material. Retain the packaging for use in returning the MDI to the factory for future recertification or repair. Section 2.2 appropriate wall outlet. Step 3 To operate the unit simply press the ON/OFF key with the system connected as outlined in steps 1 and 2. Section 3.2 MDI indicators are available in two optional configurations for portable operation. These options are: 1 – Rechargeable nickel cadmium power pack. 2 – Battery holder that supports the use of five AA alkaline, zinc and non-rechargeable batteries. Product Cleaning The enclosure of the MDI system is not watertight. As such, care should be taken during cleaning to assure liquid does not penetrate the enclosure for the base unit or Quick Select modules. Cleaning of the product should be done with a cloth moistened with a warm, mild detergent mixture. Section 3.0 Battery Life* 3/2004 Time in Hours AA NiCad Alkaline Pack 48 20 Standard Operation Total available time with: Backlight on Optional Loop supply (no load) Optional Loop supply (12mA load) Backlight & loop supply (no load) Backlight & loop supply (12 mA load) System Start-Up General Instructions The MDI system can perform a wide variety of simple and complex temperature and pressure based measurement, test and calibration operations. Due to the menu driven set up procedures the system can be quickly and easily configured for most any of its measurement functions. By following the steps in this section you can be ready to use your MDI system to perform basic pressure and temperature measurement functions in a matter of minutes. Revision 4.3 Battery Installation (Optional) Product Storage The product should be stored in an area that is maintained in the temperature range indicated in the storage temperature in the product specification. The storage temperature limits are –4 to + 158 degrees Fahrenheit. Storage of product in environments that will exceed these temperature limits results in significant risk of product damage. It is recommended that the product not be left in closed cars or truck cabs as temperature damage can easily occur due to the “greenhouse effect” of closed vehicles or extreme cold temperatures that can result from winter conditions. Section 2.3 Power Cord Connection 4.5 24 9 4 3 3.25 10 4.5 2. 2 *Battery life figures are estimates based on instrument operation at a nominal temperature of 70 degrees Fahrenheit. Use of the MDI product at temperature significantly greater than or less than 70 degrees Fahrenheit will adversely effect battery life. Battery installation and replacement is detailed in this section. -8- Step 1 To gain access to the battery compartment, turn the unit bottom side up. pack. Used pack should be treated as hazardous waste and forwarded to a recycling facility. Step 2 Open the battery compartment by turning the Step 12 Connect the replacement battery pack and place quarter turn screw in the battery compartment door. the pack in the battery compartment. Step 3 With the screw no longer engaged to the main Step 13 Replace battery compartment cover by sliding case lift the door, screw end first, and slip the opposite end of the door out of its slots. cover back into position and securing the screw. Battery installation/replacement is now complete. Charge batteries 16 hours prior to initial operation For MDI units designed for use with non-rechargeable battery types proceed to step 4. For MDI units designed for use with the NiCad power pack skip to Step 9. Section 3.3 Installation of Quick Select Module in Vacant Module Bay Step 4 Note polarity information for battery instal- lation is diagrammed inside the battery enclosure. Step 5 Remove the retaining clips over each of the battery compartments by inserting a small screwdriver in each end of the clips and flexing the end clip away from the battery. With the clip flexed outward, left the retainer up. Repeat the process for the other side of the retainer clip. Remove each of the five (5) clips in this fashion. Step 6 Locate the five AA replacement batteries to be Caution: Quick Select modules should be installed with the power off on the base unit. Failure to turn the base unit off prior to changing pressure measurement modules could damage the instrument or module electronics or “lock up” microprocessor operation. If power is inadvertently left on and the base unit locks up (looses communication) after changing Quick Select modules, simply power down the unit and restart. Refer to Section 3.6 for the procedure to remove a Quick Select module. used. Install these batteries as shown on the diagram in the battery enclosure. Step 7 Reinstall the five (5) battery retaining clips by placing over the battery and pressing each end until locked in position. Step 8 Replace battery compartment cover by sliding cover back into position and securing the screw. Step 9 Rechargeable Nickel Cadmium Power Pack To insert a Quick Select module follow the process below. Replacement *** WARNING *** Step 1 Make certain the power is off on the base unit. The MDI system, when equipped with the rechargeable battery operation option, includes automatic built-in charging circuitry. This charging circuit will automatically charge the battery pack whenever the MDI system is operated off line power. Due to this, MDI instruments with this option, must only be used with nickel cadmium battery pack provided by your MDI supplier. Modification of the system for use with other battery packs or non-rechargeable battery types such as alkaline batteries will cause risk of personal injury, instrument damage and explosion. Step 2 Hold the base unit, in one hand, with the back end of the MDI system facing the operator. Step 3 Holding the Quick Select module to be installed in the other hand, align the module with the locking tab toward the outer edge of the instrument on the side the module is to be installed. (The manifold and labels will be perpendicular to the bottom of the instrument). Step 4 Slide the Quick Select module into the module With the battery enclosure open locate and lift out the battery pack assembly. base until the retaining/release tab, the black push tab, pops out the side of the MDI instrument case. When the black tab/push button pops out the module is locked into position. Step 10 Grasp the connector across the narrow sides and Step 5 Installation of the Quick Select module is now press on the clip mechanism to release the connector. complete. If an GQS-RT1 RTD interface module is to be used, plug the desired RTD probe into the connector on the Quick Select Module. To set up the MDI and GQSRT1 combination to the desired measurement parameters proceed to Section 16. Step 11 While pressing on the clip, with constant even pressure, pull the connector outward. Important Note: Do not throw away the spent battery -9- Revision 4.3 3/2004 Important Notes: on the module label. The information on the left side of the display corresponds with the Quick Select module installed in the left module bay and information on right side of the display corresponds with the Quick Select module installed in the right module bay. If only one module is installed the corresponding side of the display will indicate “no module” on power up. 1 – Process connections to the module should: be made using teflon tape or similar sealant, be tested at low pressure prior to applying elevated pressures and should be tightly secured using proper tools. 2 – If only one module is to be used, install the Quick Select System Protection module provided. Follow the same procedure to install the system protection module as that used for a standard pressure measurement module. Both module bays of the base unit should contain a Quick Select module to protect from dirt or other debris getting into the base unit assembly. If only one Quick Select pressure module is needed install the System Protection Module (part number GQS-XS) supplied with your unit at the time of shipment when using the MDI system. Section 3.4 After the third screen the MDI system will commence providing measurement data. The format for display of the measurement data is as follows: Eng Unit Eng Unit (primary engineering unit) +xx.xxx +xx.xxx (measured value with sign) When only one module is installed, the side of the display corresponding to the side of the base unit that does not have a module will display “- - - - -” Starting-Up the MDI System After the desired Quick Select pressure module(s) or Quick Select temperature measurement interface module and probe has been installed the MDI System can be started up as follows with the unit plugged in or with the optional nickel cadmium batteries charged: If necessary, the MDI system, used with a Quick Select pressure module, may be zeroed by pressing the Zero key prior to beginning measurement activities. Additional details on zeroing the MDI system are provided in Section 6.0 of this manual. Turn the system power on by pressing the on/off key on the instrument’s key pad. The MDI system is now ready for basic pressure or temperature measurement. Simply connect the pressure port(s) of the Quick Select pressure module(s) to be used to the pressure source to be measured. If a gauge pressure measurement is to be made using a differential Quick Select pressure module be sure to connect the pressure to be measured to the high pressure port on the Quick Select pressure module. For temperature measurement, connect the RTD probe to be used to the Switchcraft connector on the interface module and proceed to Section 16.1 for instructions on setting up the MDI system for temperature measurement. ON OFF During the start up process the MDI will display a series of start-up screens that: • identify the type of module in each bay • identify the range of each installed • module (ohms range for GQS-RT modules) • indicate that the installed module (pressure only) has been calibrated with enhanced temperature performance. (consult specification sheet for detail on this capability) Section 3.5 After the start-up routine is complete the MDI will display: (for base with two pressure modules installed) There are additional set up operations that can be performed to increase the overall capabilities of the MDI system; these include: Range Range xx EngUnit xx EngUnit 1 – Auto off function to protect from inadvertently leaving the MDI system on and depleting batteries in systems equipped with the nickel cadmium or alkaline battery option. The range indication is provided in the primary engineering unit for each installed Quick Select module. Upon initial power up an MDI base unit used with an GQS-RT1 temperature module and probe will default to displaying the ohms (resistance value) for the probe. Once set up this combination will default to the previously used temperature measurement unit, such as Celsius, Fahrenheit, Kelvin or Rankine. The primary engineering unit for a given Quick Select pressure module, along with the measurement range, is included Revision 4.3 3/2004 Optional System Start Up Procedures 2 – Setting up battery level indication so that an estimate of the remaining battery life can be viewed at the push of a button. Alkaline only see section 3.5.2 for details. 3 – Programming the date and time for use in date stamping data logged measurements and for initiat- -10- ing time delayed data logging on MDI units with the optional data logging capability. Current date and time information is only maintained in units with the data logging option. The battery save mode selected is stored in Electrically Erasable Programmable Read Only Memory (EEPROM). As such it does not require reprogramming on power up. 4 – Programming owner/operator information for display on the MDI to facilitate tracking of in-house instrumentation. Section 3.5.2 The MDI indicator is available with a choice of built-in battery power options. These are: The following subsections provide information on the above listed start up procedures. Section 3.5.1 Battery Life of Optional Battery Power Feature 1 – Five AA alkaline batteries (non-rechargeable) Auto Off – Battery Save Function (BatSave) 2– Built-in NiCad power pack and charging circuitry. T he two options are mutually exclusive and must be specified at the time of order. The life expectancy of the two battery types is different and is detailed below. The MDI system can be set up to automatically turn itself off if no keypad activity is detected for a 10 minute time period. This capability will protect MDI system being powered off the optional nickel cadmium batteries from accidental depletion of the batteries. Battery Life* Time in Hours AA NiCad Alkaline Pack The following procedure is used to activate or disable the battery save function. Standard Operation Step 1 With the MDI system on and reading pressure press the SET UP key. Backlight on Optional Loop supply (no load) Optional Loop supply (12mA load) Backlight & loop supply (no load) Backlight & loop supply (12 mA load) SET UP Step 2 Using the arrow keys select the battery save function (designated BatSave in the set up menu). When selected, the text “BatSave” will flash. BatSave UserEng 48 20 4.5 24 3.25 10 9 4 3 4.5 2.5 2 Total available time with: * Battery life figures are estimates based on instrument operation at a nominal temperature of 70 degrees Fahrenheit. Use of the MDI product at temperature significantly less than 70 degrees Fahrenheit will adversely effect battery life. PerCent H2Oref Important Note: Due to the extreme variation in battery life under different operating conditions (backlight on or off or loop supply in use, it is recommended that the battery voltage value be used to determine when replacement of batteries is warranted. Step 3 With the “BatSave” text flashing press the enter key. ENT Step 4 Using the left or right pointer select Disable or Enable, as desired. When selected the text will flash. Section 3.5.3 Auto shut off Disable Enable Low Battery Icon The MDI System provides advanced warning of a low battery condition. The low battery warning icon, which looks like a miniature battery will flash in the center of the top line of the display when the measured battery voltage drops to 5.6 Vdc. The MDI system will continue to function properly with the low battery icon flashing. Step 5 With the word “Enable” flashing press enter to activate the battery save function. ENT If Enable is selected the MDI system will automatically turn off if there is no keypad activity detected for a period of 10 minutes. If Disable is selected the MDI system will remain on continuously as long as an adequate power supply is available. The system, if being operated off the nickel cadmium batteries, will continue operation until the battery voltage is no longer sufficient to power the system. To ensure uninterrupted measurement capability it is recommended that the batteries be recharged (NiCad) or replaced (alkaline) as soon as possible after the low battery icon appears. When the measured voltage drops to 5.4 Vdc, the low battery icon will flash on the display and the MDI system will turn itself off after 15 seconds. If the measured voltage drops below 5.2 Vdc the MDI system will not allow power up. -11- Revision 4.3 3/2004 Summary of low battery warnings: HH = 5.6 Vdc: Low battery icon appears 5.4 Vdc: Low battery icon remains on display, unit powers down after 15 seconds. 5.2 Vdc: Power up not allowed where: 0800 = 1200 = 2000 = MM = SS = It is estimated that the user will have between 30 and 45 minutes of battery life remaining (without the backlight option on) when the low battery icon initially appears. Actual battery life remaining will vary based on tasks being performed and ambient operating temperature. Section 3.5.4 8:00 AM noon 8 PM minutes (from 0 to 60) seconds (from 0 to 60) Setting the current date and time is accomplished by using the keys with the corresponding numerical values. From left to right enter the appropriate number in each of the field positions using the numeral keys. Once a given field has had the number entered, the MDI system will automatically index to the next position for entry. Programming Date & Time Information If the unit does not have the Data Logging option skip this section. The date/time function supports date/time recording capability that can be used in association with the Data Log option. When completed the date/time information should look as follows: YYMMDDHHMMSS 961003111500 Note: MDI units without the data logging option have no requirement for date/time data and will not keep track of the date and time when powered down. For a date/time of October(10), 3rd day (03), 1996 (96) at a time of 11:15 AM (1115), and 0 seconds (00). For various application oriented functions the use of a real time clock will be required. Setting the real time clock is a simple process and should be done when the MDI system is received. The real time clock may be set using the following procedure. When the correct time/date information has been entered press the enter key. ENT Section 3.5.5 Step 1 With the MDI system on and displaying mea- surement data press the SET UP key. Input of Owner/Operator Information Time/date information is stored in battery backed up Random Access Memory (RAM). This information should only need to be changed or reentered when a time change has occurred, the MDI system is to be used in a different time zone than the one in which it was in during initial setup or when the lithium battery used to back up the RAM needs replacement (every 1-2 years depending on the environmental conditions under which the MDI system is used). SET UP Step 2 Using arrow keys move through the menu selections and select “DateTime” on the LCD display. DateTime will flash on the display when selected. Owner¦¦ DateTime the current hour using military time Alarm RS232 RAM memory is only supplied if unit is purchased with data logging option. Time/date information is not maintained in MDI units without data log option. Step 3 With the words “DateTime” flashing press the enter key. ENT The MDI system has the ability to display, on power up, the name of the individual, department or company responsible for its use or maintenance. This will activate the date time setup screen that looks as follows: YYMMDDHHMMSS XXXXXXXXXXXX The following steps are to be followed to input user (owner) data. where: Step 1 With the MDI system on and reading pressure YY = the last 2 digits of the current year MM = the month (01 for Jan. through 12 for Dec.) DD = the day of the month (01-31 for day of the press the Set Up key, designated SET UP. SET UP month) Revision 4.3 3/2004 -12- Step 2 Using the arrow keys, select the Owner func- To enter a new owner name use the up and down arrows to scroll through the alphanumeric entries and the left and right arrows to move the active entry field (cursor) to the next location. tion from the setup menu. When selected the word “Owner” will flash on the display. Owner DateTime Alarm RS232 A blank can be inserted by using the down arrow with the letter A flashing on the display. Continuing to press the down arrow after the blank appears will provide access to numerical values starting at 9 and decreasing to 0. The label may contain alphabetical, numerical or a combination of both types of entries. Step 3 With the word “Owner” flashing press the enter key. ENT Step 4 After pressing ENT the display will read: To review: Access code? .000000 Up/down arrows provide access as follows: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, _, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z Step 5 A five digit owner access code was provided with your instrument at the time of shipment. The owner codes are included on the calibration certification sheet for the MDI base unit. Use the number keys on the MDI system keypad to enter the Owner Access Code from left to right. By maintaining pressure on the up/down arrow the displayed number or letter will continue to change until the last character has been reached. Access code? 12345 Note: Two passwords were provided with your MDI system . One password provides access to the owner programming field and the other provides access to the calibration data and recertification programming. Please be certain to select the correct password. These passwords are not interchangeable. By pressing and releasing the up/down arrow a single step from letter or number can be accomplished. The left/right arrow keys allow for entry of alpha numeric data in any of the available positions. Step 8 After the desired operator information has been If, at any time during the entry process you enter a number in error, press the CE key to clear the entry and restart the access code entry process. keyed the display will look as follows: Enter owner name JOHN Q OPERATOR If the password codes have been lost, contact your calibrator supplier. The serial number of the base unit is required for the factory to provide product password information. Step 9 After the desired owner/user information has been entered and is displayed press the enter key. ENT Step 6 With the proper access code displayed press the The MDI system will respond: enter key. JOHN Q OPERATOR Ent=OK CE=Cancel ENT If an incorrect access code is entered the MDI system will respond: Step 10 To store the owner/user information displayed press the ENT key. Pressing the CE key will return the MDI system to the measurement mode. If entry of new owner information is still required restart the process as outlined in steps 1-9 above. Access denied To restart the entry process after the “access denied” response re-enter the owner set up function through the setup menu. Owner information is stored in Electrically Erasable Programmable Read Only Memory (EEPROM). This information should only need to be changed or re-entered when the owner/user changes. Step 7 After entry of the proper access code the dis- play will read: Enter owner name xxxxxxxxxxxxxxx -13- Revision 4.3 3/2004 Section 3.6 BAT CK Provides available voltage capacity of on- Removing Quick Select Pressure or Temperature Modules board NiCad battery pack (if so equipped). *ENG UNIT Changing Quick Select pressure modules, therefore changing the measurement ranges in use, is quick and easy. Simply follow the steps below to accomplish the desired change. Step 1 Using the on/off key on the keypad of the base unit turn the power to the base unit off. ON OFF Also note: pressing and holding down the ENG UNIT key will prompt the MDI Indicator to display the range and pressure type of the module installed. Releasing the key allows the unit to resume normal pressure measurement operations. Step 2 With one hand, hold base unit with the back panel facing the operator. Step 3 Press the black tab on the side of the MDI case corresponding to the side of the Quick Select module to be removed. MIN/MAX Displays the minimum and maximum pres- Step 4 Maintain pressure on the black retaining tab sure values measured. (See Section 11.0 for details.) and with your other hand firmly grasp the pressure manifold or, with temperature and calibration modules, the connector mounting tab, that extends from the end of the Quick Select module and slide (pull) the module out of the module bay. TARE Allows for subtraction of an operator selected value from the displayed pressure measurement value for one or two Quick Select pressure modules. (See Section 9.0 for details.) FLOW Provides ability to measure the flow of a gas in terms of velocity or volume. (See Section 14.0 for details.) *LEAK Allows testing for leaks in terms of pressure decay over time or in terms of leak rate. (See Section 15.0 for details.) Important Note: To protect from dirt or other debris getting into the base unit a module should be installed in both module bays. If only one module is needed install the System Protection Module (part number GQS-XS) supplied with your unit. Section 4.0 Key Function Overview The MDI system has a great deal of functionality. Many of the product capabilities are activated by dedicated keys on the keypad. Other functions are either activated or set up through a set up menu activated by pressing the set up key. A brief overview of the function of each key follows. DATA LOG Provides set up capability for manual or (OPTIONAL)automated data logging. (See Section 22.0 for details.) DATA STORE Provides ability to store measured (OPTIONAL) pressure at the push of a key when MDI system is used in manual data logging mode. (See Section 22.5 for details) Key Designation Function ON/OFF Turn unit on and off. SET UP Provides access to set up functions for various on-board firmware functions/capabilities. PORT SEL Used to select displayed measurement data. Selection includes: reading pressure from either one or both installed modules as well as selection of reading pressure and electrical measurements simultaneously. (See Section 5.0 for details.) ZERO Revision 4.3 Provides ability to zero, either one or both, Quick Select Modules. (See Section 6.0 for details.) 3/2004 Used to select desired engineering unit from the following: psi, inHg, inWC, ftSW, Bar, mBar, kPa, Mpa, mmHg, cmWC, mmWC, kgcm, user. Where “user” is an operator programmable engineering unit, allowing the display of any single engineering unit not included in the above list. (See Section 8.0 for details.) -14- HOLD Freezes the displayed pressure and electrical measurements. (See Section 10.0 for details.) ^ *TRIP DETECT BACK LITE < Moves cursor up. Provides access to pressure switch testing firmware. (See Section 18.0 for details.) Activates back light function. Moves cursor to the left. *DAMP > CE mA/V Pressing the Port Select key once will result in the following display change: Activates or disables damping used to smooth displayed pressure measurement data from the effects of low level pressure transients. (See Section 12.0 for details.) psi +123456 Moves cursor to the right. Pressing the Port Select key a second time will result in the following display change: Clears previous entry. mA +1.234 Changes electronic measurement display from mA to V or V to mA and can also be used to deactivate either side of the display. (See Section 7.0 for details.) v Moves cursor down. *% Converts display from pressure units to % of f.s. (See Section 13.0 for details.) ENT Enters input data. psi +123456 Level of damping desired. F +72.35 o Unit Select: Water reference temperature or user (non library) engineering unit entry can be selected. F +72.35 o mA +1.234 Pressing the Port Select key a second time will result in the following display change: % Readout: Input zero and span, output zero and span and device type (I/P, P/I, P/P, P/E). mA +1.234 The required data is input through the set up functions provided by the corresponding menu options accessed and available by pressing the setup key. psi +123456 Pressing the Port Select key a third time will result in the display returning to a readout mode featuring the measurement data from both of the installed modules. As seen below: Complete details of each of the above outlined capabilities is included in the section referenced after the function summary provided above. F +72.35 o Port Select Function The Port Select Key, designated PORT SEL, provides the ability to select either of the two installed Quick Select modules for display, both modules for display or either a pressure/temperature module on one side and a current or voltage measurement on the other side of the display. psi +123456 See 8.4 for display of pressure in two different engineering units. See Section 7.0 for display of current and voltage measurement data. Section 6.0 Zero Function This section applies to pressure measurement only. The zero function does not apply to the function of temperature measurement. The tare capability will function in conjunction with temperature measurement modules. This allows for the subtracting of a displayed or operator entered temperature value from the displayed tempera- For example, if the MDI system has two pressure modules installed and is reading in psi the standard display for dual pressure readout would be: psi +123456 psi +123456 Pressing the Port Select key once will result in the following display change: Type of measurement (leak rate vs pressure decay), time to monitor and for leak rate applications the volume of the vessel to be monitored. Section 5.0 psi +123456 If the MDI system has a temperature measurement interface module installed the same type of sequence would be followed. For example, if the MDI system had an RTD interface module installed in the left module bay the following sequence would be observed as a result of pressing the PORT SEL key. * These functions require data input through activation of appropriate input fields in the setup menu. Examples of required input data include: Leak: psi +123456 Pressing the Port Select key a third time will result in the display returning to a dual pressure readout mode. As seen below: Notes on key functions: Damping: mA +1.234 psi +123456 -15- Revision 4.3 3/2004 Left Side of Display ture measurement data. See Section 9.0 for information on the tare function. Pressing the zero key when two Quick Select pressure modules are installed and displayed will simultaneously zero both pressure modules. In addition, each module can be zeroed independently, as outlined in the following section. It is recommended that the instrument be zeroed prior to use or calibration. Section 6.1 The pressure/temperature value on the display corresponds with the measured value of the Quick Select module installed in the module bay on the corresponding side of the MDI system. To read a current or voltage follow the steps below. Zeroing One of Two Installed Quick Select Pressure Modules Step 1 With the MDI system on and reading pressure/ temperature set the display as outlined in Section 5.0 to display the pressure measurement of the desired module. If zeroing one of two installed modules is desired the following process should be followed: Step 2 With the pressure measurement, for the de- In this example we will assume that the left pressure module is to be zeroed and the right module module is to be unchanged. sired module, displayed on one side and the electronic measurement on the other press the mA/V key until the desired electrical measurement parameter appears. For example, with a pressure module installed in the left module bay, pressing the mA/V key will produce the following results: Press the port select the number of times required (one or two) to deactivate the display of pressure on the side that you wish not to re-zero. Step 1 PORT SEL First display when electronic measurement is initiated through the port select function: psi mA +123456 +1.234 When set up in accordance with the requirements of this example the MDI system will have the following information on the display: psi +12345 Result from pressing mA/V key first time: mA +1234 psi +123456 psi volts +123456 +1.234 side that is not to be zeroed press the zero key. ZERO Result from pressing mA/V key a third time: The MDI system will respond by displaying: psi +00000 psi mA +123456 +1.234 mA +1234 Using the combination of the port select function and the mA/V function any combination of measurements can be produced. To resume the display of pressure measurement data, for the pressure module not zeroed, press the port select key the required number of times (one or two) to restore the dual pressure display. Step 3 Section 8.0 When complete the MDI system will display: psi +00000 Displaying Current and Voltage Measurements Pressure measurement data may also be displayed in a user programmable non-library engineering unit. Section 8.2 Programming a Custom (User) Defined Engineering Unit provides complete details on setting up an operator defined engineering unit. As outlined in the previous section the port select (PORT SEL) key is used to select the information seen on the display. The display configurations available are: 3/2004 Engineering Unit Selection – Pressure Measurement The MDI system is factory programmed to provide pressure measurement in 12 engineering units. These include; psi, inches of mercury, inches of water, feet of sea water, bar, mbar, kilopascal, megapascal, millimeters of mercury, centimeters of water, millimeters of water and killograms per square centimeter. psi +12345 Pressure measurement activity can now be resumed. Revision 4.3 ------ Result from pressing mA/V key a second time: Step 2 With the pressure display deactivated for the Section 7.0 Right Side of Display pres/temp pres/temp pres/temp electrical measurement electrical measurement pres/temp -16- Inch, centimeter and millimeter of water engineering units may be set up for conversion at temperatures of 4 degrees and 20 degrees C or 60 degrees F. Consult Section 8.5 H2O Reference Temperature Selection to program the desired temperature for inches or centimeters of water conversions. Section 8.1 In the preceeding example mBar is the selected unit. Step 3 With the desired engineering unit flashing press the enter key. ENT The MDI system will respond by displaying the pressure measurement(s) in the newly selected engineering unit. If two Quick Select pressure modules are installed both will be displayed in the selected engineering unit. The MDI system can also display the measurement data of two installed Quick Select pressure modules in independent engineering units. Section 8.4 provides the set up procedures for dual module dual engineering unit operation. Selecting a Factory Programmed Engineering Unit To select an engineering unit from the on-board library follow the steps below: Step 1 With the MDI system on and displaying pres- sure measurement data press the engineering unit key. This key is designated ENG UNIT. ENG UNIT Section 8.2 The MDI system will respond by displaying the engineering unit library as follows: The MDI system has a user programmable engineering unit available. This allows for the display of pressure measurement data in an engineering unit that is not in the library of the MDI system. Any unit of pressure measurement that is linearly proportional to pressure change can be programmed for use in the user engineering unit field. first screen: psi Bar Setting up a Custom or User Defined Engineering Unit inHg inWC ftSW mBar kPa mPa second screen: For this example, the pressure measurement unit of mSW (meters of sea water) will be used as the desired user engineering unit. To set the user engineering unit to provide pressure measurement data in mm Hgcm WCmm WC kgcm user The engineering unit abbreviations correspond to the following engineering units: mSW follow the steps below. psi: pounds per square inch inHg: inches of mercury inH2O: inches of water column* ftSW: feet of sea water Bar: bar mBar: millibar kpa: kiloPascals mPa: megaPascals mmHg: millimeters of mercury cmWC: centimeters of water column* mmWC: millimeters of water column* kgcm: kilograms per square centimeter user: user programmable engineering unit (see Section 8.2 for details) Step 1 With the MDI system on and reading pressure press the key designated SET UP. SET UP Step 2 Using the arrow keys select the User engi- neering unit option displayed as “UserEng”. The text “UserEng” will flash when selected. BatSave PerCent UserEng H2Oref Step 3 With the text “User Eng” flashing press the enter key. ENT *Conversion factor is programmable for temperature. Consult Section 8.5 for details. Step 4 After pressing the enter key the MDI system will respond by displaying: Step 2 Using the left/right and up/down arrow keys Conv from psi .000000 select the desired engineering unit. When selected, the text for the desired engineering unit will flash. psi inHg,inWCftSW Bar mBar kPa mPa Step 5 Enter the conversion factor required to convert from psi to the engineering unit desired. For conversion from psi to mSW the conversion factor is 0.684482. En- -17- Revision 4.3 3/2004 ter 6 digits to provide the required resolution to support the accuracy of the MDI system . Appendix B provides a list of conversion factors. Step 8 For this example, after the engineering unit label has been keyed the display will read: Enter unit’s name mSW Use the number keys to enter the desired conversion factor, entering the required factor from left to right. For our example of mSW the conversion factor is 0.684482 and the display should read: Step 9 With the desired engineering unit label dis- played press the enter key. ENT Conv from psi 0.684482 After the enter key has been pressed the MDI system will resume normal pressure measurement in the original engineering units. Instructions on how to use the custom engineering units are provided in the following section. If an incorrect conversion factor is entered press the clear entry key, designated CE, to re-initiate the entry process for the correct factor. Section 8.3 Step 6 When the correct numerical value appears on the display press the enter key. Using A Custom Engineering Unit After a custom engineering unit has been programmed it may be used by following the steps below. For information on programming a custom engineering unit refer to Section 8.2 Setting up a Custom or User Defined Engineering Unit. ENT After entering the conversion factor the MDI system will respond by displaying: Enter unit’s name _ _ _ _ _ _ To display pressure measurement data in the user engineering unit: Step 7 Enter the name of the engineering unit selected, Step 1 With the MDI system on and measuring pres- sure press the engineering unit key. Designated ENG UNIT on the keypad. abbreviated to 6 characters or less. For our example mSW is a 3 character abbreviation for meters of sea water. This abbreviation will fit in the 6 digit field. To enter the mSW engineering unit label use the up and down arrow keys to increment or decrement through the alphabet/ numerical values and the left and right arrows to move the active entry field (cursor) to the next location. ENG UNIT The MDI system will respond by displaying: First screen: If needed for the desired engineering unit, a blank can be inserted by using the down arrow with the letter A flashing on the display. Continuing to press the down arrow after the blank appears will provide access to numerical values starting at 9 and decreasing to 0. The label may contain alphabetical, numerical or both types of entries. psi inHg,inWCftSW Bar mBar kPa mPa Second screen: mmHgcmWCmmWCkgcm user To review: Step 2 Using the left/right and up/down arrow keys Up/down arrows provide access as follows: select the word “user”. When selected the word “user” will flash. 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, _, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z mmHgcmWCmmWCkgcm user By maintaining pressure on the up/down arrow the display number or letter will continue to change until the last character has been reached. Step 3 With the word “user” flashing press the enter key. By pressing and releasing the up/down arrow a single increment or decrement between letters or numbers can be accomplished. The MDI system will respond by displaying pressure measurement data in the following display format: ENT u_mSW u_mSW xxxxxx xxxxxx The left/right and up/down arrow keys allow for entry of letters or numbers in any of the available label positions. Revision 4.3 3/2004 where: -18- u_ indicates that the engineering unit in use is a user defined unit with a label of mSW Pressing the port select one time will deactivate the left pressure display converting it to a mA measurement field. Pressing the port select a second time will deactivate the right side, converting it to a mA measurement field and returning the left side of the display to the function of pressure measurement. xxxxxx represents the current pressure measurement(s) in the user engineering unit. See Section 8.4 Display of Two Engineering Units for information on how to simultaneously display the measured values from two Quick Select pressure modules in different engineering units. Section 8.4 Since we want the right side to remain psi we will deactivate it in the psi mode by pressing the port select key once. Display of Two Engineering Units PORT SEL The MDI system can display pressure measurement data from two installed Quick Select pressure modules in independent engineering units. To display two different engineering units simultaneously the following procedure should be followed. The MDI system will respond with the following display: psi mA +12345 +1234 Step 1 With the MDI system on and displaying pres- sure measurement data from two Quick Select pressure modules press the engineering unit key designated ENG UNIT on the keypad. With the right side deactivated from pressure measurement activities press the engineering unit key, designated ENG UNIT on the keypad. Step 5 ENG UNIT ENG UNIT Step 2 Using the arrow keys select either of the two The MDI system will respond by displaying: desired engineering units. For this example we will select psi as one of the desired units. psi inHg,inWCftSW Bar mBar kPa mPa With psi selected the text “psi” will flash on the display and the display will look as follows: Using the arrow keys select the desired engineering unit for the left side. In this example we have opted for the engineering unit of Bar. With the Bar engineering unit selected the display will look as follows with the text “Bar” flashing: psi inHg,inWCftSW Bar mBar kPa mPa Step 3 Press the enter key to select psi. psi inHg,inWCftSW Bar mBar kPa mPa ENT The MDI system will respond by returning to the pressure measurement mode and will display the measurement data for both Quick Select pressure modules in psi, as follows: With the desired engineering unit selected (flashing) press the enter key. Step 6 ENT psi psi +12345 +12345 The MDI system will respond by displaying the following: Bar mA +12345 +1234 Step 4 Next, press the port select to deactivate the display of pressure measurement data on the side that you wish to maintain pressure measurement in terms of psi. A pressure display is deactivated when the corresponding side of the display contains milliamp (mA) data, Voltage (V) data or is blank “ ------ ”. Step 7 Reactivate the right side of the display for pres- sure measurement by pressing the Port Select key, as required. First press of the port select key. See Section 5.0 for details on the port select function. PORT SEL In this case we will assume that the right side will remain in psi and our goal is to present the measurement data from the left Quick Select pressure module in bar. MDI system will respond by displaying the following: -19- Revision 4.3 3/2004 The MDI system will respond by displaying: mA psi +1234 +123456 H2O ref temp 20C 60F 4C Second press of the Step 4 Using the left/right arrow keys select the de- PORT SEL sired temperature for the conversion factor. The selected value will flash on the display. MDI system will respond by displaying the following: H2O ref temp 20C 60F 4C Bar psi +12345 +12345 In the above example the conversion factor for water at 60 degrees Fahrenheit was selected. Using this process, any engineering unit may be selected for display of the right or left Quick Select pressure module measurement data. Section 8.5 Step 5 With the desired temperature for the conversion factor flashing press the enter key. Temperature Selection for H2O Conversion Factor ENT The MDI system includes a library of 12 factory programmed engineering units. This selection includes the engineering units inH2O, mmH2O and cmH2O. The pressure generated by a column of water will vary with the temperature of the water. The selected conversion temperature will be activated and will be stored in Electrically Erasable Programmable Read Only Memory (EEPROM). It will not have to be reentered on power-up unless a change in the reference temperature is desired. Over the years, several temperature references have evolved into industry standards. These are the conversion factors most commonly used by manufacturers of pressure instruments when calibrating pressure measurement devices in terms of the height of a column of water. To facilitate your calibration and test of these instruments, the MDI system includes 3 conversion factors for each of the water column based pressure engineering units. The conversion factors are for the temperatures of 4 and 20 degrees Celsius and 60 degrees Fahrenheit. The factory default setting is 20 degrees C. After pressing the enter key the MDI system will resume basic pressure measurement. The selection of the desired temperature for use in the conversion of water based pressure measurements can be accomplished by following these steps. If the MDI system is in use with two Quick Select modules, independent tare values can be entered for each of the module modules. If one of two installed Quick Select modules has been deactivated, meaning the measured values are not shown on the display, the MDI system will request a tare value only for the active module. To input a tare value for one or two Quick Select pressure modules follow the steps below. Section 9.0 The MDI system has the ability to tare (subtract an operator selected value) from the displayed pressure or temperature measurement value of either one or two installed Quick Select modules. This is most commonly required in applications where a pressure pre-load, as in a weighing application, must be subtracted from the displayed pressure measurement. Step 1 With the MDI system on and reading pressure press the SET UP key. SET UP Step 1 With the MDI system on and displaying pres- Step 2 Using the up/down and left/right arrow keys sure measurement data press the tare key. select the H2O reference option displayed as “H2Oref” in the set up menu. When selected the text “H2Oref” will flash on the display. TARE The MDI system will respond by displaying the following: BatSave PerCent UserEng H2Oref Left tare value +xxxxxx Step 3 With the text “H2Oref” flashing press the If tare was active the previous value in use will be displayed. If the previous tare value was zero the MDI enter key. ENT Revision 4.3 3/2004 Tare Function -20- system will display the last pressure measurement prior to pressing the TARE key. appearing in the RS232 output data stream and will also result in a flashing H appearing on the left side of the top line of the instrument display. Step 2 Use the number keys to input a tare value other than the default value or to change the existing tare value. If no tare value is desired input zero (0). The RS232 output will look as follows for a dual module measurement: Warning: Failure to enter the zero (0) will result in the MDI system automatically accepting the last displayed value as the desired tare value. Normal Operation +1.2345 inH2O +1.2345 inH2O Left Min: +0.00000 Max: +1.2345 Right Min: +0.0000 Max: +1.2345 With Hold Function Invoked +1.2345 H inH2O +1.2345 inH2O Left Min: +xxxxx.x Max: +xxxxx.x Right Min: +xxxxx.x Max: +xxxxx.x Left tare value +12345 Step 3 With the desired value displayed press the enter key. ENT Section 10.1 Step 1 To invoke the hold function press the hold key. The MDI system will respond by displaying the following: HOLD Right tare value +xxxxx The MDI system will respond by freezing the displayed values and adding a flashing “H” that will appear in the left most position on the top line of the display. Step 4 Use the number keys to input a tare value other than the default value or to change the existing tare value. If no tare value is desired input zero (0). Step 2 To exit the hold function press any key. Warning: Failure to enter the zero (0) will result in the MDI system automatically accepting the last displayed value as the desired tare value. Note: While in the hold mode, if the RS232 interface is enabled, the MDI system will continue to transmit the displayed values. Right tare value +12345 Section 11.0 Step 5 With the desired value displayed press the Minimum and Maximum Value Tracking The MDI system monitors and stores in memory both the minimum and maximum pressure or temperature values measured. The following procedure will allow review of these values. enter key. ENT Note: The measurement data on the display will flash if the MDI system is operating in the tare mode. Step 1 To recall the minimum and maximum values simply press the key labeled: After pressing the enter key the MDI system will resume normal pressure measurement activities. Tare values may be reviewed at any time by pressing the TARE key. If the MDI system is being used with two Quick Select modules and only one module has a nonzero tare value the display will only flash on the side that corresponds to the Quick Select module with the nonzero tare value. MIN MAX The MDI system will respond by displaying: +12345 -12345 +12345 -12345 where: maximum values are displayed on the top line and +12345 represents the maximum value(s) measured. Minimum values are displayed on the bottom line and -12345 represents the minimum value(s) measured. Step 6 To exit the tare mode follow the procedures out- lined in steps 1 through 5 and at the tare value prompt enter zero (0). When the tare values for both modules have been reset to zero tare mode operation will be discontinued and the display will stop flashing. Section 10.0 Using the Hold Function If two Quick Select modules are installed, the min/max function recalls and displays the minimum and maximum values for both modules simultaneously. Hold Function The hold function provides the ability to freeze the displayed pressure, flow or electrical measurement values. In addition, pressing the hold key will result in an H Step 2 To clear the stored minimum and maximum value press the clear entry key: -21- Revision 4.3 3/2004 CE ENT Step 4 In response to the activation of the dampening Pressing any key other than the CE key will maintain the stored values in memory. set up menu the MDI system will respond by displaying the following: Pressing any key on the keypad will return the MDI system to normal pressure measurement activities. Section 12.0 fast <------- > slow X Damping Where the left most position represents zero damping (averaging of 1) and the right most position represents maximum damping (averaging of 16 readings). Starting from the left each movement of the highlighted box to the right increases the number of samples being averaged by one (1). By moving the highlighted field to the left the level of damping can be reduced. Damping provides the ability to stabilize the displayed or transmitted pressure value by minimizing the effects of low level transients and electronic instability. Damping is most commonly used with Quick Select pressure modules to overcome the effects of pressure pulsation and vibration transmitted through the measurement media. The level of damping is established in the set up menu. Activation of the damping process is accomplished through a dedicated key on the keypad. The level of damping desired will likely vary from application to application and module range to module range. For best results, select the minimum amount of damping necessary to provide a stable display value. It is important to recognize that while damping will stabilize the displayed and/or transmitted value it will also slow down the response rate to a true pressure change. The slow down results from the fact that an averaged value will be displayed. If the damping level is set to 16 the displayed value will represent the average pressure measurement over the previous approximately 2.1 seconds (16 readings times 130mS/reading). Therefore, the greater the level of damping in use the greater the time lag will be between the displayed measurement and the true (not averaged) pressure measurement value. Damping accomplishes the stabilization of the pressure measurement value by producing an averaged pressure value which is shown on the display and available for transmission over the RS232 interface. When damping is not activated the MDI system takes a new pressure value approximately every 130 to 240mS (7.5/per second on average) and updates the display. If required, this same measurement data is also transmitted via the RS232 interface. When damping is activated the value displayed and/or transmitted is an average value. The average consists of the average of from 1-16 consecutive readings. The higher the number of readings averaged the greater the stabilization effect of the damping. The number of consecutive readings averaged is programmable, allowing the damping function to be tailored to the specific requirements of most any application. Section 12.1 Note: Speed of update is based on display of a single measurement parameter on one side of the instrument display. Use the left/right arrow keys to set the desired damping level, for example, averaging 8 readings as shown here. Set Up of the Damping Function fast <---------> slow The following steps should be used to set up the level of damping desired. _ _ _ _ _ _ _ X _ _ _ _ _ _ _ _ Step 5 With the desired level of damping shown press Step 1 With the MDI system on and reading pressure the enter key to store the damping level in EEPROM. press the SET UP key. ENT SET UP The level of damping has now been set. Proceed to Section 12.2 for instructions on how the damping process is activated. Step 2 Using the arrow keys move through the set up menu and select “Dampen” on the display of the MDI system . The word “Dampen” will flash on the display when selected. Section 12.2 Activating or Discontinuing the Damping Function EvntTimr Dampen LeakRate Status The following process provides step by step instructions on how to activate or discontinue the damping function. Step 3 With the word Dampen flashing press the Step 1 Once established in the set up menu the damp- enter key. Revision 4.3 ing process may be enabled or disabled through the use 3/2004 -22- of the DAMP key on the keypad. To activate/deactivate the damping function press the DAMP key on the keyboard. If the MDI system is equipped with the data logging option the percent error and percent full scale information can be stored in the MDI system on-board memory. To do this follow the set up instruction provided in Section 22.5 Manual Data Logging. DAMP In response to pressing the DAMP key the MDI system will respond by displaying: Note: The MDI system is available with an optional 24 Vdc built-in loop power supply. This supply can be used to power transducers, transmitters and switches during calibration and test operations. If the MDI indicator is to be powered by the battery option, Section 3.2 of this manual should be consulted for the effects of the loop power supply on battery life. damping function Disable Enable Step 2 Using the left or right arrow select “Disable” to turn damping off or “Enable” to initiate damping. When the desired option is selected (flashing) press the enter key. Section 13.1 ENT The percent function is set up as follows: On power up the MDI system will default to damping disabled. Damping must be re-initiated via the keyboard after the instrument has been turned back on. The level of damping, established in the set up menu is stored in EEPROM and, therefore, does not need to be reprogrammed after power up unless the level of damping desired has changed Section 13.0 Step 1 With the MDI system on and reading pressure press the SET UP key. SET UP Step 2 Using the arrow keys select the text “PerCent” from the setup menu. When selected the text “PerCent” will flash on the display. Percent Function The percent function allows the MDI system to display the output from a device under test in terms of percent error at a given percentage of the total range. This function applies to the calibration of both temperature and pressure transmitters. For example, if the MDI system is being used to calibrate a 0-100 psi transmitter with a 4/20 mA output the MDI system can be programmed to display the following data: Pressure Applied 0 psi 25 psi 50 psi 75 psi 100 psi Set Up of the Percent Function BatSave PerCent UserEng H2ORef Step 3 With the text “PerCent” flashing press the enter key. ENT The MDI system will respond by displaying: Normal Display Mode Enter Input Zero .000000 4 mA 8 mA 12 mA 16 mA 20 mA Step 4 Using the number keys enter the lowest cali- bration point for the device to be tested. For example: For a 0-100 inH2O range instrument enter 0. For a –5 to 0 to +5 inH2O transducer enter –5. For a 0-200 degree RTD enter 0 The percent mode of operation allows for quick and easy determination of the level of inaccuracy of the device under calibration. For example: If 50 psi was applied to a 100 psi device with a 0-10 Vdc output but instead of 5 Vdc the transmitter being calibrated had an output of 4.995 Vdc the MDI system, when used in the percent mode, displays the following: When the desired “zero” value has been entered the display will look as follows for the testing of a 0-100 in H2O transducer. Enter Input Zero .000000 % scale % error +50 -0.05 If an incorrect value is entered use the CE key to clear the entry and re-key the zero value. With the desired “zero” value displayed press the enter key. Therefore, the percent mode of operation eliminates the need for operator calculations to determine the level of accuracy of the device under test. ENT -23- Revision 4.3 3/2004 P/E is a pressure or temperature to voltage device The MDI system will respond by displaying: Enter Input FS .000000 In this case we are testing a 0-100 inH2O range transducer that produces a 0-10 Vdc output from zero to F.S. Therefore, the appropriate selection is P/E and the display will look as follows: Step 5 Using the number keys enter the full scale range (F.S.) of the device to be calibrated. For our example of a 0-100 in H2O range instrument the display will look as follows: Device type I/P P/I P/P P/E Enter Input FS 100 Step 10 With the desired device type flashing press the enter key. ENT Step 6 With the desired input full scale displayed press the enter key. At this time the system will return to measurement activities. ENT Section 13.2 The MDI system will respond by displaying: Enter output Zero 0.0000 Use of the Percent Function As with input zero, the output zero is the lowest output the device being calibrated will produce. Note: The MDI system must be set up so that the desired Quick Select module is active and so that the desired electronic measurement is displayed prior to entering the % mode. Consult Sections 5.0 Port Select and 7.0 Current & Voltage Measurements for setup details. For example: Step 1 With the percent function set up, press the % For a 0-10 Vdc output device enter zero. For a 4/20 mA output device enter 4. For a 1-5 Vdc output device enter 1. key on the keypad of the MDI system to activate the percent mode of operation. Step 7 With the desired output “zero” keyed in and Step 2 Connect the output lines from the device under % displayed press the enter key. test to the inputs jacks on the front of the MDI. . Use the mA and COM jacks for current devices and the V and COM jacks for voltage output devices. ENT The MDI system will respond by displaying: Step 3 Make the necessary plumbing connections to Enter output FS 0.0000 allow input of applied pressure to both the MDI system and the device under test. Step 8 Using the number keys enter the full scale out- Step 4 Perform testing in accordance with the number put of the device being calibrated. For a 0-10 Vdc output device the display will look as follows: of calibration points required for the device to be tested. Step 5 To exit the percent mode press the percent key. Enter output FS 10 % The MDI system will respond by returning to basic pressure or temperature measurement activities. Step 9 With the desired full scale output displayed press the enter key. Section 14.0 ENT The MDI system will respond by displaying: Flow Velocity and Flow Volume Measurement Background Using the left/right arrow keys select the appropriate device type where: The MDI system used in conjunction with a pitot tube or an annubar has the ability of measuring the flow volume or flow velocity of a clean dry gas. The MDI system must be used with a GQS-1 low differential pressure Quick Select module to perform the flow measurement function. I/P is a current to pressure device P/I is a pressure or temperature to current device P/P is a pressure to pressure device The accuracy of a flow measurement is a function of a number of contributing factors. These are; the basic accuracy of the differential pressure measurement, ac- Device type I/P P/I P/P P/E Revision 4.3 3/2004 -24- curacy of the pitot tube or annubar in use as it relates to the K factor supplied by the manufacturer of the device and the accuracy of the correction being made for the air density. It is not possible for your instrument supplier personnel to provide an all inclusive accuracy statement for flow measurement activities. Steps that can be taken to maximize system flow measurement accuracy include: Basic keypad functions such as damping, tare, min/max recall, mA/V measurement display, battery check, display hold, data logging, zero and port select are available for use during flow measurement activities. Consult the appropriate sections of this manual for information on the set up and use of these product functions. For flow measurement follow the steps outlined in the sections corresponding to the type of flow measurement (velocity or volume) to be performed. 1 – Calculation and input of the actual air density for the media to be measured. The air density is a function of temperature, humidity, barometric pressure. Section 14.2 Step 1 With the MDI system on and displaying pres- The velocity equation (ft/min) is as follow: V = 1097 x K sure measurement values press the flow key. dpw) dpw Adw FLOW The MDI system will respond by displaying: where: Flow Velocity Volume dpw = differential pressure in inches of water Adw = the air density Step 2 To perform flow velocity measurements select The air density can further be calculated through employing the following equation: the word velocity using the left/right arrow keys. When selected the word velocity will flash. Ad = 0.07649 x ( Pa/14.73) x [520/(T+460)] Flow Velocity Volume where: Pa = the absolute pressure in duct in psia T = air temperature in duct in degrees Fahrenheit Flow Volume = (velocity x duct area)/144 Step 3 With the word Velocity flashing press the enter key: ENT 2 – Purchase of a characterized and certified pitot tube or annubar with a K factor determined for the specific probe to be used. The MDI system will respond by displaying: Enter Air Density lbs/ft3 .07480 3 – Purchase of the highest accuracy differential pressure Quick Select module available. Section 14.1 Flow Velocity Measurement Step 4 Using the number keys input the required air den- sity value or press enter to use the 0.07480 default value. Set Up for Flow Velocity and Flow Volume Measurement Step 5 With the required air density value displayed In preparation to perform flow velocity and volume measurements the operator should have the following information available for entry during the set up of the application on the MDI system . press the enter key. ENT The MDI system will respond by displaying: EnterFlowCoef(K) x.xxx K factor: Provided by the manufacturer of the flow probe to be used. Air density: A default value has been programmed into the MDI system in the event that a more accurate one cannot be calculated. Duct area : For air volume measurement the area of the duct in which measurements are to be taken must be calculated. The flow coefficient or K factor is a value specific to the pitot tube or annubar to be used. Consult the manufacturer of the annubar or pitot tube for the K factor for your flow probe. A default value of 0.6 is factory programmed into the MDI system firmware. This value can be overwritten, with a K factor for the specific flow measurement probe, to optimize flow measurement accuracy. A GQS-1 differential type (dual process connection) Quick Select pressure module must be used for flow measurement activities. Step 6 Connect the pitot tube or annubar to the Quick -25- Revision 4.3 3/2004 Select pressure module, as indicated in the manufacturers manual for the flow probe, high side to the high pressure port on the Quick Select pressure module and low side to the low pressure port on the Quick Select module. sure measurement data press the flow key. FLOW The MDI system will respond by displaying: Flow Velocity Volume Place the probe in the duct as instructed in the probe manual. The MDI system will now display the measured differential pressure in terms of flow velocity. Step 2 Using the left/right arrow keys select the word volume. When selected the word will flash. Press the Clear Entry Key (CE) to exit flow measurement and return to pressure measurement. Section 14.3 Flow Velocity Volume Engineering Units for Flow Velocity Step 3 With the word Volume flashing press the As with standard pressure measurement the MDI system can provide flow velocity in a variety of units of measure. To select a unit of measure for flow velocity follow the steps below. enter key. ENT The MDI system will respond by displaying: Step 1 With the MDI system operating in the flow Enter Duct Area sq.in. xxxxxx velocity mode (refer to Section 14.1 for instructions on entering the flow velocity mode) press the engineering unit key. Step 4 Calculate the area of the duct for which flow volume is to be determined. The equations for area calculations are as follows: ENG UNIT For rectangular or square ducts: The MDI system will respond by displaying the following: area (square inches) = W x H ft/min ft/sec MPH MeterSec where: W = width of the duct in inches H = height of the duct in inches These are the 6 units of measure available for display of flow velocity. For round ducts: Step 2 Using the left/right and up/down arrow keys se- lect the desired unit of measure. When selected the unit of measure will flash. In this example the engineering unit of ft/sec has been selected. area (square inches) = (π/4 )D2 where: π = 3.141592 ft/min ft/sec MPH MeterSec D = diameter of the duct in inches Step 5 Using the number keys input the area value Step 3 With the desired unit of measure flashing, press calculated in step 4. the enter key. Enter Duct Area sq.in. 123456 ENT After pressing the enter key the MDI system will resume measuring flow velocity in the selected unit of measure. Section 14.4 Step 6 With the appropriate area value displayed press the enter key. Flow Volume Measurement ENT Note: In order to do flow volume measurement you must first set up the measurement parameters required for flow velocity. Failure to do this will result in the MDI system accessing the previously stored input data on air density and K factor in the generation of the flow volume measurement. If an incorrect area value is keyed press the clear entry (CE) key to reenter the required data. The MDI system will now be set up to provide flow volume measurement data for the desired duct. To Exit Flow Volume Measurement and Return to Basic Pressure Measurement Press the Clear Entry Key (CE). Step 1 With the MDI system on and displaying pres- Revision 4.3 3/2004 -26- Section 14.5 Engineering Units for Flow Volume ft/min ft/sec MPH MeterSec As with standard pressure measurement the MDI system can provide flow volume measurements in a variety of units of measure. To select a unit of measure for flow velocity follow the steps below. When in the flow volume mode the engineering unit selection is: ft3/min ft3/sec m3/min m3/Sec Step 1 With the MDI system operating in the flow volume mode (refer to Section 14.4 for instructions on entering the flow volume mode) press the engineering unit key, designated ENG UNIT. Step 2 Using the arrow keys select either of the two desired engineering units. For this example we will select ft/min first. ENG UNIT ft/min ft/sec MPH MeterSec The MDI system will respond by displaying the following: ft3/min ft3/sec m3/min m3/Sec Step 3 With one of the two engineering units to be used selected and flashing, in this example ft/min, press the enter key. These are the 4 units of measure available for display of flow volume. ENT Step 2 Using the arrow keys select the desired unit of The MDI system will respond by returning to the flow measurement mode and will display the measurement data as follows: measure. When selected the unit of measure will flash. In this example the engineering unit of ft3/sec unit has been selected. ft/min ft/min +12345 +12345 ft3/min ft3/sec m3/min m3/sec Step 4 Next, press the port select to deactivate the Step 3 With the desired unit of measure flashing, press display of flow measurement data on the side that you wish to maintain displayed measurement data in terms of ft/min. A pressure display is deactivated when it is replaced by a milliamp (mA), Voltage (V) or a blank (----). See Section 5.0 for details on the port select function. the enter key. ENT After pressing the enter key the MDI system will resume measuring flow volume in the selected unit of measure. Section 14.6 In this case we have decided that the left side of the display will be in meters/second and the right side will remain in ft/min. Simultaneous Display of Two Flow Measurements in Independent Engineering Units Pressing the port select one time will deactivate the left pressure display converting it to an mA measurement field. Pressing the port select a second time will deactivate the right side, converting it to an mA measurement field and returning the left side of the display to the function of flow measurement. The MDI system can display flow measurement data from two installed Quick Select pressure modules in independent engineering units. In order to display two different engineering units simultaneously the following procedure should be followed. In this example we will assume the operator is in the flow velocity mode and would like to present the measured values in ft/min on the right side of the display and meters/second on the left side of the display. Since we want the right side to remain ft/min we will deactivate it in the ft/min mode by pressing the port select key twice. Step 1 With the MDI system on and displaying flow PORT SEL (velocity or volume) measurement data from two Quick Select pressure modules press the engineering unit key, designated ENG UNIT. The MDI system will respond with the following display: ft/min mA +12345 +1234 ENG UNIT Step 5 With the right side deactivated from flow mea- When in the flow velocity mode the engineering unit selection is: surement activities press the engineering unit key. -27- Revision 4.3 3/2004 ENG UNIT measurement from one installed Quick Select pressure module and a pressure measurement from a second installed Quick Select Pressure module. For example, the measurement of flow can be displayed in ft/min for one installed Quick Select pressure module and the second installed pressure module can be used to simultaneously display the measured value in terms of inches of water. This ability eliminates the need for “on-the-fly” change between flow and pressure measurement functions when doing airflow testing. The MDI system will respond by displaying: ft/min ft/sec } MPH MeterSec Step 6 Using the arrow keys select the desired engi- neering unit for the data on the left side of the display. In this example we have opted to display the flow measurement data on the left side in terms of meters/second represented by MeterSec on the display. With the MeterSec engineering unit selected the text “MeterSec” will be flashing: To set the MDI system up to present simultaneous display of pressure and flow (velocity or volume) data follow the steps below. Step 1 With the MDI system on and displaying pres- ft/min ft/sec MPH MeterSec sure measurement data from both modules, if necessary, select the desired engineering unit to be displayed for the pressure measurement. This is done by accessing the Engineering Unit library by pressing the ENG UNIT key. Details on engineering unit selection are provided in Section 8.0 of this manual. Step 7 With the text “MeterSec” selected and flashing press the enter key. ENT The MDI system will respond by displaying the following: MeterSec +12345 Important Note: The MDI system must be set up for pressure measurement first. With pressure measurement set up, deactivate the side of the display to remain in pressure mode prior to setting up the desired flow measurement parameters. If flow measurement is set up before pressure measurement access to pressure engineering units will be lost. mA +1234 Step 8 Reactivate the right side of the display for flow measurement by pressing the Port Select key, as required. First press of the PORT SEL When set up to measure both pressure and flow engineering units for both measurements can be accessed as outlined in Section 8.4. MDI system will respond by displaying the following: mA +1234 Step 2 Use the port select key to deselect the displayed ft/min +123456 output of pressure from the module which is to be left in the pressure readout mode of operation. When a module is deselected the corresponding side of the display on the MDI system will read milliamp (mA), blank “-----“ or Volts(V). Second press of the PORT SEL Press the port select key one time to deselect the right module. Press the port select two times to deselect the left module. MDI system will respond by displaying the following: MeterSec ft/min +1234 +123456 PORT SEL To Exit Flow Measurement and Return to Basic Pressure Measurement Press the Clear Entry Key (CE). Step 3 With the desired pressure module deselected Using this process, any engineering unit may be selected for display of the right or left Quick Select module measurement data. follow the procedure outlined in Section 14.2 if the flow measurement is to be flow velocity or Section 14.4 if the flow measurement is to be a flow volume measurement. Section 14.7 Step 4 As outlined in Section 14.2 for flow velocity or Simultaneous Display of Measurement Data for Flow (Volume or Velocity) and Pressure Section 14.4 for flow volume select the desired engineering unit. Step 5 With the display for the active flow measure- The MDI system can simultaneously display a flow Revision 4.3 3/2004 -28- ment correct, reactivate the deactivated port using the port select function. may be changed at any time while the MDI system is displaying any combination of flow and temperature measurement data. Simply use the engineering unit select function as described in Section 14.2 for flow velocity and Section 14.4 for flow volume. PORT SEL Note: The units used to express flow measurement may be changed at any time while the MDI system is displaying any flow measurement data. Simply use the engineering unit select function as described in Section 14.2 for flow velocity and Section 14.4 for flow volume. Note 2: Units for display of temperature measurement data can be changed at any time via the “RTmodule” or “TCmodule” menu in the setup menu of the MDI system. To Exit Flow Measurement and Return to Basic Pressure Measurement Press the Clear Entry Key (CE). To Exit Flow Measurement and Return to Basic Pressure Measurement Press the Clear Entry Key (CE). Section 14.8 Section 14.9 Simultaneous Display of Measurement Data for Flow (Volume or Velocity) and Temperature Simultaneous Display of Flow Volume and Flow Velocity The MDI system can simultaneously display flow measurement data from two installed differential low pressure Quick Select modules with one output displayed in terms of flow volume and the other pressure measurement displayed in terms of flow velocity. For example, the measurement of flow can be displayed in ft/min for one installed Quick Select module and ft3/min for the second installed module. The MDI system can simultaneously display a flow measurement from one installed Quick Select pressure module and a temperature measurement from a second installed Quick Select module. For example, the measurement of flow can be displayed in ft/min for one installed Quick Select pressure module and the second installed pressure module can be used to simultaneously display the temperature measurement value in degrees Celsius or Fahrenheit. This ability eliminates the need for “on-the-fly” change between flow volume and flow velocity measurement functions when doing airflow testing. This ability eliminates the need for “on-the-fly” change between flow and temperature measurement functions when doing airflow testing. To set the MDI system up to present simultaneous display of flow velocity and flow volume follow the steps below. To set the MDI system up to present simultaneous display of temperature and flow (velocity or volume) data follow the steps below. Step 1 Set the MDI system up to display flow velocity or volume (refer to Sections 14.2 and 14.4 for information on setting up the MDI system to perform flow velocity or flow volume testing). In this example, we will assume the MDI system is starting from the simultaneous display of two flow velocity measurements. In this mode the MDI system display will look as follows: Step 1 With the MDI system turned off install the required differential pressure module and RTD probe interface module. Step 2 Turn the MDI system on. ft/min ft/min +12345 +12345 Step 3 As outlined in Section 16.1 set up the tempera- ture measurement function via the RTmodule submenu accessed via the main Set Up menu. See Section 16 for complete instructions on setting up the MDI system for temperature measurement using an RTD temperature probe. Step 2 Using the port select key, deactivate the side of the display that you wish to maintain in the flow measurement mode. In this case we will display flow in terms of ft/min on the left side and ft3/min on the right side of the display. Step 4 With the side of the display to be used for flow measurement active and reading the measured pressure from a dual process connection type Quick Select pressure module press the FLOW key. PORT SEL Pressing port select once will deactivate the right side of the display from flow or pressure measurement and convert it to an mA measurement function. FLOW Proceed as directed in Section 14.2 for flow velocity and 14.4 for flow volume measurement. ft/min +12345 Note 1: The units used to express flow measurement -29- mA +1234 Revision 4.3 3/2004 Pressing port select a second time will deactivate the left side of the display from flow or pressure measurement, converting it to a mA measurement. The right side of the display will resume flow/pressure measurement activities. The second press of the port select key will result in the following data display. To Exit Flow Measurement and Return to Basic Pressure Measurement Press the Clear Entry Key (CE) Section 14.10 As outlined previously, the MDI system can present pressure measurement data from one or two Quick Select pressure modules simultaneously. This ability also extends to the MDI system ’s ability to display flow measurement data. In addition, the MDI system can simultaneously display a flow measurement on one side of the display and a current or voltage measurement on the other side of the display. This capability can be useful in calibrating transducers and transmitters that are calibrated in terms of flow, such as 0-200 ft/minute. m/A ft/min +12345 +12345 In this example, since we will be leaving the left side of the display in terms of ft/min the port select key should be pressed two times to produce the display: m/A ft/min +12345 +12345 Step 3 With the desired side of the display deactivated press the flow key on the keypad of the MDI system . To take a flow measurement and monitor the electrical output from the device under test follow the procedures below: FLOW The MDI system will respond by displaying: Step 1 Set the MDI system up to function in the Flow Velocity Velocity Volume desired flow measurement (velocity or volume) mode of operation. Refer to Section 14.2 for information on setting up the MDI system for velocity measurement or Section 14.4 for information on setting up the MDI system for volume measurement. Step 4 Using the left/right arrow keys select the desired measurement function. In this case we have decided that the left side of the display will remain in the velocity mode and the right side will be changed to measure flow in terms of volume. Therefore, volume should be selected for this example. Step 2 Select the desired engineering units as outlined in Sections 14.3 for flow velocity and 14.5 for flow volume. Flow Velocity Velocity Volume Step 3 Press the port select key. PORT SEL Step 5 With the word volume flashing press the enter key. The MDI system will respond by changing the right side of the display from pressure/flow measurement to the display of an mA measurement. The display will continue to display the output from the left Quick Select module in terms of flow. ENT The MDI system will respond by displaying: m/A ft3/min* +12345 +12345 To read the output of the right Quick Select module in terms of flow and the electrical measurement output from the device under test press the Port Select key a second time. *Refer to engineering unit selection, Section 14.5, if an alternate unit of expressing flow volume is desired. Step 6 Press the port select key to reactivate the left Step 4 With the flow and electrical measurements side of the display for flow or pressure measurement. appearing in the desired locations on the display the current measurement can be changed to a voltage measurement by pressing the mA/V key. PORT SEL mA V The left side of the display will have remained in terms of ft/min. When reactivated the display will look as follows: ft/min +12345 ft3/min +12345 Pressing the mA/V key once will change the display to “------”. Pressing the mA/V key a second time will change the display to “volts”. The MDI system is now set up for simultaneous display of flow volume and flow velocity. Revision 4.3 3/2004 Simultaneous Display of Flow (Volume or Velocity) and an Electrical Output Measurement -30- Step 5 Connect the Quick Select Sensor module to be Step 5 With the word Rate flashing press the enter key. used to the pressure source to be measured. ENT Step 6 Connect the output of the device to the standard The MDI system will respond by displaying: banana jacks on the keypad of the MDI system as follows: Vessel Volume cu.in. .000000 For current output devices: use mA and com jacks. For voltage output devices: use Vdc and com jacks. Step 6 Using the number keys enter the volume of the Percent mode operation is also available for flow test and calibration measurement instruments. Refer to Section 13.0 for information on percent function use. Section 15.0 vessel to be tested in cubic inches. Vessel Volume cu.in. 12324 Leak Detection Function The MDI system provides the ability to detect and quantify leaks in terms of pressure decay over time (psi change per unit of time) or in terms of leak rate (cc/sec). Step 7 With the MDI system displaying the required In the pressure decay mode the MDI system will monitor the desired pressure vessel for the programmed time interval and, at the end of the monitoring time period, display the measured pressure change. In the leak rate mode the MDI system will monitor the pressure vessel over the programmed interval and display the leak rate in terms of cc/sec. Step 8 The MDI system will respond by displaying: vessel volume press the enter key. ENT Time to Monitor sec. xxxxx Step 9 Using the number keys enter the time interval, in seconds, over which the leak rate test is to be performed. The time interval may be from 0.1 to 65,000 seconds. Use of the leak detection function requires the setup of the leak test parameters. The following procedures should be followed to set up and perform a leak test using the MDI system . Section 15.1 Time to Monitor sec. 12345 Step 10 With the desired test interval displayed press Leak Rate Function Setup the enter key. Step 1 With the MDI system on and displaying pressure ENT press the set up key. At this point the MDI system will return to basic pressure measurement. See Sections 15.3 and 15.4 for information on performing leak rate testing. SET UP Step 2 Using the arrow keys, locate and select the Section 15.2 words “LeakRate” in the set up menu. When selected the words “LeakRate” will flash. Pressure Decay Test Setup Step 1 With the MDI system on and displaying pres- sure press the set up key. EvntTimr Dampen LeakRate Status SET UP Step 3 With the words LeakRate flashing press the enter key. Step 2 Using the arrow keys, locate and select the words “LeakRate” in the set up menu. When selected the words “LeakRate” will flash. ENT The MDI system will respond by displaying: EvntTimr Dampen LeakRate Status Leak Mode Rate Decay Step 3 With the words LeakRate flashing press the enter key. Step 4 Using the left/right arrow select the word Rate. ENT Leak Mode Rate Decay -31- Revision 4.3 3/2004 Section 15.4 The MDI system will respond by displaying: Leak Mode Rate Decay Leak rate and pressure decay tests are performed as follows: Step 1 With the MDI on and reading pressure connect Step 4 Using the left/right arrow select the word Decay. the pressure port of the selected pressure module to the vessel to be monitored. If the pressure module incorporates a differential pressure module use the high pressure port for the test procedure. Leak Mode Rate Decay Step 5 With the word Decay flashing press the enter key. Step 2 ENT For Pressure Decay – Select the desired engineering unit to be used as described in Section 8. Step 6 The MDI system will respond by displaying: Time to Monitor sec. xxxxx For Leak Rate – Leak rate measurements are made in cc/seconds and require no selection at this point. Step 7 Using the number keys enter the time interval, Step 3 Pressurize the vessel to the required level for in seconds, over which the pressure decay test is to be performed. The time interval may be from 0.1 to 65,000 seconds. the test and allow vessel pressure to stabilize from the effects of sudden pressure increase or decrease. Step 4 Press the key designated LEAK on the keypad Time to Monitor sec. 12345 of the MDI base unit. LEAK Step 8 With the desired test interval displayed press The MDI will display: the enter key. Timing eng unit sec xxxxx ENT At this point the MDI system will return to basic pressure measurement. See Sections 15.3 and 15.4 for information on performing leak rate testing. Section 15.3 where: Timing indicates that the MDI is timing the desired monitoring interval. Module Selection; Leak Rate or Pressure Decay Tests sec = the remaining time left to be monitored. eng unit = the engineering unit in use for the selected module. xxxxx = the current pressure measured by the selected pressure module. To perform leak testing the desired Quick Select pressure module must be monitored by the MDI system. The following provides information on activating the desired pressure module for leak test applications: For Pressure Decay Testing at the end of the test the MDI system will display the following: With Two Quick Select Pressure Modules Installed If two pressure modules are installed and the output of both are displayed, the MDI will default to performing the leak test using the left pressure module. Eng Unit Decay cccc xxxx If two Quick Select pressure modules are installed and one of the two modules is deselected, meaning the measurement values of that module are not shown on the display, the MDI will automatically select the active pressure module to perform the leak test measurements. where: Eng Unit = the engineering unit of the measured value. cccc = current pressure measurement for the selected pressure module. xxxx = the measured pressure change during pressure decay test. The port select key (PORT SEL) is used to select or deselect a module. When a module is deselected the corresponding side of the display will indicate mA, Volts or “------”. If only one Quick Select pressure module is installed the MDI system will default to the installed module for leak test measurements. Revision 4.3 3/2004 Performing Leak Rate or Pressure Decay Tests For Leak Rate Testing at the end of the test the MDI system will display the following: Eng Unit cc/sec cccc xxxx -32- Engineering Units: Fahrenheit, Celsius, Kelvin, Rankine or ohms where: Eng Unit = the engineering unit of the current pressure measurement value. cccc = current pressure measurement for the selected pressure module. xxxx = the measured leak rate over the test interval. Ohms Measurement Range: GQS-RT1 module: 0/400 ohms GQS-RT2 module: 0/4000 ohms The interface module incorporates a Switchcraft TA4M type connector and requires an RTD with the appropriate Switchcraft TA4F mating connector. The connector is available through your instrument supplier. To resume basic pressure measurement press the clear entry (CE), enter (E) key or any of the four arrow keys. Pressing any function key will activate that selection. For example, pressing the engineering unit select key (ENG UNIT) will activate the engineering unit selection program. To use the GQS-RT module with RTD probes already in your possession simply connect your RTD to the mating connector. Important Note: After completing leak testing the MDI system will display pressure measurement data for the module that was used in the testing process and will display “------” on the other side of the display. If a second module is installed in the other module bay it can be re-selected using the port select function (PORT SEL) as detailed in Section 5.0. Section 16.0 Your instrument supplier also provides Pt100 RTD probes in a number of configurations with the Switchcraft TA4F already installed. Contact your instrument supplier for information on pricing and available configurations. Section 16.1 Temperature Measurement Using RTD probes Step 1 With the instrument off install the appropriate GQS-RT Quick Select RTD interface module. Instructions for installation of a Quick Select module can be found in Section 3.2 of this manual. The MDI system can be used with most standard RTDs (Resistance Temperature Detectors) to provide precision temperature measurements. An GQS-RT type Quick Select module is needed in order for the MDI system to perform temperature measurement with an RTD. The GQS-RT provides the interface between the MDI system base unit and the RTD probe. There are two GQS-RT Quick Select modules available in order to provide support for the most common RTD resistance levels. Step 2 Connect the desired RTD probe to the Switch- craft connector on the module Step 3 Turn the MDI system on by pressing the On/ Off key. The capabilities of the modules are summarized below: ON OFF Step 4 To access the temperature setup menu press the GQS-RT1 Quick Select Module Pt 100 (385&392) –200 to 550°C: 550 to 850°C: Setting Up the MDI System for Temperature Measurement set up key. SET UP +0.15°C +0.2°C Step 5 Use the downward pointing arrow to access the Ni 120 following selection screen 80 to 260°C: +0.1°C Calib dp Meas* Cu 10 70 to 150°C: +0.6°C * dp Meas is an optional feature. This text will not appear if the MDI unit was purchased without this option. Ohms +0.01% reading +0.02 ohms Step 6 As required, using the left/right and up/down GQS-RT2 Quick Select Module arrows select the text “RTmodule”. The text RTmodule will flash when selected. Pt 1000 184 to 275°C: RTmodule TCmodule Calib dp Meas +0.15°C Ohms +0.01% reading +0.2 ohms RTmodule TCmodule Step 7 With the text “RTmodule” flashing press the enter key. -33- Revision 4.3 3/2004 ENT 5-8 available for programming using the optional calibration and programming software for the GQS-RT1 module, part number 838X014-01 for 31/2 inch disk or 838X014-02 for 51/4 inch disks. The MDI system will respond by displaying: Probe Connection 2W 3W 4W Important Note: The GQS-RT1 is compatible with RTD probes with output resistance values of between 0 and 400 ohms. Use of the module with higher resistance RTD probes will result in diminished accuracy and possible damage to the module electronics. This represents the configuration of the RTD to be used, where the number equals the number of wires the RTD uses. Note: The use of a 4 wire RTD is recommended for optimum accuracy. The GQS-RT2 is pre-preprogrammed for the following RTDs Step 8 Using the left/right arrow keys select the appro- priate configuration for the RTD probe to be used. In the example below the 4 wire configuration was selected. Position Probe 1 PT 1000 2-8 available for programming using the optional calibration and programming software for the GQS-RT2 module. Probe Connection 2W 3W 4W Step 9 With the desired wiring configuration selected press the enter key. Important Note: The GQS-RT2 is designed for use with RTD probes with output resistance values of 1000 to 4000 ohms. It will function with lower resistance RTDs but will provide diminished accuracy. In addition, use of the module with higher resistance probes will result in diminished accuracy and possible damage to the module electronics. ENT The MDI system will respond by displaying the available units of measure as follows: Engnring units: ºC ºF ºK ºR Step 12 Using the left/right arrow keys select the RTD Using the left/right arrow keys select the desired engineering unit for the measurements to be made. In the example here the measurements will be made in degrees Celsius. Step 10 probe type for the measurements to be made. In the example here the measurements will be made in using the PT 100 type 385. Probe: 12345678 Engnring units: ºC ºF ºK ºR a385 Pta385 Step 11 With the desired engineering unit selected and Step 13 With the desired probe type selected and flash- flashing press the enter key. ing press the enter key. ENT ENT The MDI system will respond by displaying the following: Probe: Pta385 The MDI system will respond by displaying: Resolution: 1 .1 .01 12345678 R0=100 On initial use the first selection and the corresponding probe will appear selected. Use the arrow keys to select the desired coefficients from the available factory programmed curves. The GQS-RT1 is pre-preprogrammed for the following RTDs. Probe α385 –200/850 2 α392 –200/850 3 Ni Minco (Ni 120Ω) 4 Cu 10 ohm 3/2004 0.001 The maximum resolution that the combination of the MDI system base unit, RTD interface module and probe can support can be determined as follows: The resolution of the RTD module is 0.001% of the full scale resistance of the reference resistor used in the module. The GQS-RT1 incorporates a 400 ohm reference resistor and the GQS-RT2 incorporates a 4000 ohm reference resistor. Position 1 Revision 4.3 –200/850 R0=100 Using the GQS-RT1 as the example the maximum resolution is: -34- Section 17.0 0.001% of 400 ohms = 0.00001 x 400 = 0.004 ohms The Thermocouple Interface Module allows the MDI base unit (equipped with firmware version 2.01 or later) to read the input from a thermocouple temperature measuring device. The calibrator offers the following features for thermocouple measurement: For a Pt100 the temperature resolution can be determined as follows: 0.004 ohms/(100 ohms x 0.00385 ohms/degree C) = 0.008 degrees C (approx 0.005 degrees F) • • • • • Therefore, rounding to the next highest digit results in a resolution of 0.01 degrees C. The resolution supported for the factory programmed RTDs can be found below: Using the RT-1 Using the RT-2 Probe Type Resolution Pt 1000 1.0 degrees C or F R S B Resolution must be selected in conjunction with the full scale ohms output for the RTD probe to be used. N Step 14 Select the desired resolution using the left/right arrow keys. In this case, since we are using the Pt100 RTD with a maximum resolution of 0.01 degrees C the 0.01 option has been selected 1.1.01 Materials Iron & Copper-Nickel (Constantan) Nickel-Chromium & Nickel-Aluminum Copper & Copper-Nickel (Constantan) Nickel-Chromium & Copper-Nickel (Constantan) Platinum-13% Rhodium & Platinum Platinum-10% Rhodium & Platinum Platinum-30% Rhodium & Platinum – 6% Rhodium Nickel-Chromium-Silicon & Nickel-Silicon Magnesium For the TC1 certification procedure, see Appendix F. Section 17.1 Thermocouple Measurement Set Up Step 1 To begin measurement with a thermocouple, first 0.001 attatch the thermocouple to a male “miniature thermocouple connector”. Please note that connectors are specifically manufactured for each thermocouple type and will be marked accordingly. Failure to use the properly mated connector will result in additional inaccuarcy. Step 15 With the desired resolution selected and flash- ing press the enter key. ENT Step 2 Turn the calibrator off. Install the thermocouple The MDI system will briefly show internal limit settings and will then commence temperature measurement. interface module into either of the modules bays in the top of the calibrator. Now install the thermocouple into the interface by inserting the male blades of the miniature connector into the slots in the receptacle located on the top of the thermocouple interface module. The measurement parameters can be changed at any time through the activation of the RTmodule set up menu. Section 16.2 selectable units of measure direct millivolt readout for any type of thermocouple choice of internal or external refernce junction Selectable resolution, or “auto” mode Programming to allow readout in temperature units for the following 8 thermocouple types: Type J K T E Probe Type Resolution Pt 100 (385 & 392) 0.01 degrees C or F Ni 120 0.1 degrees C or F Cu 10 0.1 degrees C or F Resolution: Thermocouple Interface Module Calibrating/Programming the RT GQS-RTD Interface Module Step 3 Turn the base unit on. The GQS-RT can be programmed in the field. Programming, calibration adjustment or recertification can be accomplished with the Calibration Programming Utility disk. Please note, in order to improve the accuracy of the measurement system it will be necessary to generate a significant number of very accurate temperature calibration points using precision temperature baths. In general, the simplest way to en-hance the accuracy of the temperature measurement is to simply re-zero the probe while immersed in an ice bath. When the display has completed the “power up” cycle, press the “set up” key. SET UP Using the arrow keys, select the words “TC Module.” TC Module Press the “enter” key. ENT -35- Revision 4.3 3/2004 Using the left or right arrow keys, select the degree of resolution closest to the working tolerance for the type of thermocouple that has been installed or select the “auto” mode (which will allow the calibrator to automatically adjust the display to the greatest significant resolution), and press the “enter” key. If two thermocouple interface modules have been installed, the calibrator will require a selection as to which side (left or right) the current programming cycle is to be applied. The display will read: SELECT LEFT MODULE RIGHT ENT Using the left or right arrow keys, select the module to be programmed and press the “enter” key. The calibrator will now display the choices for the reference junction. ENT Ref auto (Note: If only one thermocouple interface module is installed, the left/right selection identified in the previous step will not appear. The process will begin with the selection of engineering units identified below.) By selecting the “auto” mode, the calibrator will utilize the internal thermistor/resistor based on the reference junction that is resident inside the interface module. The calibrator will display: The “manual” mode allows for the use of an external reference junction. A stable temperature reference, usually in the form of an ice bath, is required. Engnring units: ºC ºF ºK ºR mV Using the left or right arrow keys, select the desired unit of measure, and press enter. (Selection of the millivolt readout will instruct the calibrator to display the voltage within the thermocouple circuit. The internal reference junction cannot be applied in this mode). Using the left or right arrow keys, select the desired reference junction and press the “enter” key. ENT If the “auto” mode was selected, the calibrator will now return to real-time measurement mode, displaying the temperature measurement from the thermocouple and the reading from the other module bay, if a module or an interface module has been installed. No further base unit programming will be required. If the millivolt mode has been selected, the programming cycle will end when the “enter” key is pressed, and the calibrator will begin to display the real-time millivolt measurement from the thermocouple circuit. If the “manual” mode was selected, the calibrator must be programmed with the reference temperature of the external reference junction. the display will read” ENT The top display will now indicate the choices for the thermocouple types. In addition, the lower line of the display will indicate the 2 types of metal which comprise the thermocouple type which is currently flashing. (By selecting a thermocouple type, the calibrator will access the factory programmed coefficients which will allow the calibrator to display in a unit of temperature measurement). Ref Program in the new temperature value of the external reference junction, using the number keys on the keypad. (The value that is being programmed should be referenced to the same unit of measure that was selected for the readout). Press the “enter” key. Using the left or right arrow keys, select the type of thermocouple that has been installed, and press the “enter” key. ENT The calibrator will now return to the real-time measurement. ENT When the base unit is turned off and turned on again, it will have “remembered” the selections that were made during the previous entry process, and default to those parameters (refer to appendix C for specifications). The display will now indicate the resolution choices. Revision 4.3 3/2004 temperature (A value may already be programmed, or the calibrator may display “.0000”. Entering a new value will over write these existing numbers). TC: JKTERSBN Fe - Cu/Ni Resolution 1 .1 .01 junction: manual auto -36- Section 18.0 Pressure and Temperature Switch Testing calibration and test operations. If the MDI indicator is to be powered by the battery option, Section 3.2 of this manual should be consulted for the effects of the loop power supply on battery life. The MDI system can be used to test pressure and temperature switches. On board firmware provides the ability to verify switch trip points, reset point and to test the deadband of a pressure switch. To perform these type of tests follow the procedures as outlined in the subsections of Section 18. 2 – Loop Power Supply, Model LPS-IIa- A portable 9 Vdc powered power supply that provides a 24 Vdc output. This device can be used to provide the necessary electrical supply for the testing of switches that are not active or connected to a line supply. For information contact your instrument supplier and request bulletin HACC-PS. The switch testing process incorporated in the MDI system firmware looks for a change of state that produces a change of greater than either 2 volts or a 2 mA across the corresponding banana jacks. The banana jacks are located on the bottom of the keypad on the MDI system. Prior to initiating these test procedures the required electrical set up should be configured to provide the necessary signal levels. Section 18.1 3 – Voltage Converter, Model SM-1- A modular voltage adapter device that connects to the voltage and common banana jacks on the MDI system. The MDI system voltage measurement capability is limited to 30 Vdc. Testing of switches used in controlling higher level electrical supplies, without first reducing the input to an acceptable level, could seriously damage the MDI system electronics. The SM-1 will reduce electrical inputs in the range of 10/250 Vac and 10/400 Vdc to 3 Vdc. The 3 Vdc output from the SM-1 will provide sufficient output (over 2 Vdc) to register as a change in state while also protecting the MDI system electronics from damage. Setting Up the MDI System for Testing of Pressure and Temperature Switches The following procedure outlines the set up required for the test of pressure and temperature switches. Step 1 With the MDI system on and reading pressure or temperature, in accordance with the type of switch to be tested, press the Port Select key, designated PORT SEL, the required number of times to leave activated the Quick Select module being used for the test function and deactivate (convert the display to mA, “------” or Volts) the other side of the display. Step 4 Connect the output signal of the switch to the banana jacks on the front of the MDI system as outlined below. For voltage: volts (V) jack and common (COM). For current: milliamps (mA) jack and common. PORT SEL Step 5 Connect the switch to a controlled pressure/ vacuum source to generate the required level of pressure or vacuum to trip the switch. Step 2 Press the mA/V key as required to change the electrical measurement parameter to that to be used for the switch test. Switch to Volts if the change of state will be greater than 2 Volts; switch to mA if the change of state will be greater than 2 mA. Step 6 Proceed to Section 17.2 for trip detect testing or to Section 18.3 for deadband testing. Section 18.2 Test of Switch Trip Point Step 1 With the MDI system on and reading pressure mA V or temperature press the trip detect key. TRIP DET Step 3 Connect the switch electronics with a current or voltage source, as required, to provide the required greater than 2 Vdc or greater than 2 mA change in state. Be certain that the change in state to be generated corresponds to the electrical measurement (mA or V) set up on the display of the MDI system. The MDI system will respond by displaying: Disable Deadband Manual Step 2 Using the left/right and up/down arrow keys Notes: The MDI is available with several accessories/ options to simplify the testing of switches. These are: select the word manual in the menu selection. When selected the word manual will flash. 1 – The MDI system is available with an optional 24 Vdc built-in loop power supply. This supply can be used to power transducers, transmitters and switches during Disable Deadband -37- Manual Revision 4.3 3/2004 Step 3 With the word “manual” flashing press the Deadband enter key. Step 2 Using the left/right and up/down arrow keys ENT select the word deadband in the menu selection. When selected the word deadband will flash. Step 4 Gradually increase the pressure, vacuum or temperature until the display of the MDI system indicates that a change of state has been detected. When the switch has tripped the MDI system will display: Disable Manual Deadband Eng Unit Tripped +12345 +vvvvv Step 3 With the word “Deadband” flashing press the • Eng Unit is the pressure or temperature engineering unit in use Step 4 Gradually increase or decrease, as required, enter key. ENT where: pressure, vacuum or temperature until the display of the MDI system indicates that a change of state has been detected. When the switch has tripped the MDI system will display: • Tripped indicates the pressure or temperature switch has tripped • +12345 represents the pressure or temperature at which the switch tripped Eng Unit Tripped +12345 +vvvvv • +vvvvv voltage value where: Step 5 To perform additional trip tests press any key • Eng Unit is the pressure or temperature engineering unit in use and the trip detect system will be rearmed. Step 6 To discontinue the switch testing process press • Tripped indicates the pressure or temperature switch has tripped the trip detect key. TRIP DET • +12345 pressure at which the switch tripped • +vvvvvvoltage value The MDI system will respond by displaying: Disable Deadband Step 5 To perform a deadband test, maintain the Manual pressure/vacuum or temperature and power applied to the switch and press any key to re-arm the trip detection system. Step 7 Using the left/right and up/down arrow keys select the word disable in the menu selection. When selected the word disable will flash. Disable Deadband TRIP DET Manual Step 6 Gradually allow the pressure/vacuum or Step 8 With the word “disable” flashing press the temperature level applied to the switch to return to the starting point. enter key. Step 7 When the MDI system detects a reset on the ENT switch the MDI system will respond by displaying: Deadband +xxxxxxx +yyyyyyy +zzzzzz The switch test operation has now been terminated. Section 18.3 Switch Deadband Test Procedure where: Step 1 With the MDI system on and reading pressure xxxxxx is the measured trip point zzzzzz is the measured reset point yyyyyy is the measured deadband value or temperature press the trip detect key. TRIP DET Step 8 To perform additional deadband tests press any The MDI system will respond by displaying: key and the trip detect system will be rearmed. Disable Manual Revision 4.3 3/2004 Step 9 To discontinue switch testing press the trip detect key. -38- TRIP DET To configure the RS232 interface on the MDI system for the communication with your input device, first determine the interface requirements of the device to be used with the MDI. Then using the RS232 setup feature configure the RS232 interface on the MDI system, following these steps: The MDI system will respond by displaying: Disable Manual Deadband Use a standard RS232 cable, to connect the MDI system to a 9 pin serial port on a computer, available from your instrument supplier. An adaptor to connect the MDI system to a 25 pin serial connection on a computer is also available. The RS232 connector is located above the AC adapter input on the right side of the MDI system when looking down at the MDI system with the keypad up in the normal operating orientation. Pin out information is provided in the event that you wish to use your own RS232 cable. Step 10 Using the left/right and up/down arrow keys select the word disable in the menu selection. When selected the word disable will flash. Disable Manual Deadband Step 11 With the word “Disable” flashing press the enter key. ENT The switch deadband test operation has now been terminated. Section 19.0 Section 19.1 RS232 Interface General Information Configuring RS232 Interface for Use with a Dumb Terminal To communicate with the MDI system through the use of a dumb terminal set the terminal up as follows: To simplify the interface of the MDI system with your computer, recorder, data acquisition hardware or dumb terminal three standard operating modes for the RS232 interface are available. A fourth RS232 operating mode, ISO1745, is included on the menu options. This mode is only used in uploading data from the optional data logging memory and in factory calibration, set up and repair activities. Select baud rate to be used: 300, 1200, 2400 or 9600 Select communications (com) port: 1 or 2 Set data bits to: 8 Set stop bits to: 2 Set parity to: None Flow control: None Section 19.2 RS 232 Connector RS232 Configuration Options The MDI system supports three methods of communication. These communication formats will appear as selection options during the set up of the RS232 interface. A fourth mode of RS232 communication, ISO1745, is listed in the menu selections. This RS232 mode is only used for uploading, to a computer or acquisition system, measurement data stored in the optional data logging memory and for factory calibration, setup and repair activities. An overview of the features of these formats follows. Section 19.2.1 RS232 Interface ISO1745 Operating Mode Overview Pin 1 2 3 4 5 6 7 8 9 Function The ISO1745 mode of operation is used to interface the MDI system with the upload program provided to export data logged values into a P.C. compatible computer. If your MDI system is equipped with the optional data logging capability, consult Section 24 of this manual for set up of the RS232 interface with uploading of stored data. A separate manual is provided to support the use of the upload software provided with your MDI system. Units not equipped with the data logging option are not supplied with the upload program disks or manual. Relay 1 common (for alarm option) Transmit data Read data Data set ready Ground Data transfer ready Relay 1 normally open (for alarm option) Relay 2 common (for alarm option) Relay 2 normally open (for alarm option) -39- Revision 4.3 3/2004 Section 19.2.2 RS232 Interface – Journal Mode Overview Section 19.2.4 RS232 Interface – Remote Mode Overview The remote modes supports communication and control of the MDI via a PC or terminal. See Appendix A for complete details on remote communications. This mode allows the MDI system to be interfaced to an RS232 compatible printer or other device where a steady, timed data output is required. When the journal mode is selected the MDI system will transmit the current pressure measurement(s) as shown below: Section 19.3 +0.005 inH2O+0.0000 psi Left Min: +0.0045 Max: +0.0053 Right Min: +0.0000 Max: +0.0000 +0.003 inH2O+0.0000 psi Left Min: +0.0032 Max: +0.0049 Right Min: +0.0000 Max: +0.0000 +0.003 inH2O+0.0000 psi Left Min: +0.0033 Max: +0.0035 Right Min: +0.0000 Max: +0.0000 To use the RS232 interface in the Journal Mode follow the steps below. Step 1 With the MDI system on and reading pressure press the set up key. SET UP Step 2 Using the arrow keys move through the menu selections and select “RS232” on the display of the MDI system. The text “RS232” will flash on the display when selected. Each data set consists of three (3) lines. The first line displays the current measurement data as seen on the instrument display. This line will display the pressure, flow, temperature or electrical measurement in the selected units of measure. Engineering units may be changed from the keypad as outlined in the engineering unit section of this manual, Section 8.0, while the RS232 interface is in use. In addition, the MDI system can be changed from pressure to flow measurement while the RS232 interface is in use. Owner Alarm DateTime RS232 Step 3 With the text RS232 flashing press the enter key. ENT This will activate the RS232 setup options sub menu. The first screen that appears after selection of RS232 from the main setup menu is: The second line displays the minimum and maximum values stored in memory for the left module module since the last time the memory locations were cleared. RS232 interface Disable Enable The third line displays the minimum and maximum values measured by the right module since the last time the minimum and maximum pressure values were cleared from memory. The RS232 interface must be enabled (activated) for the MDI system to communicate with any RS232 device. When the RS232 is not in use it is recommended that the RS232 interface be disabled to conserve on power use and maximize battery life. In the journal mode the RS232 interface will output the data as outlined above at a regular interval. The interval is selected in the RS232 setup procedure and may be from 1 second to 65,000 seconds. Step 4 Use the arrow keys to select Enable (activate) and press the enter key. Section 19.2.3 RS232 Interface – Inquiry Mode Overview RS232 interface Disable Enable When the RS232 interface of the MDI system is set up in the inquiry mode the MDI system transmits the data string shown below in response to an operator selected inquiry character. +0.003 Eng Unit Step 5 With the word Enable flashing press the enter key. ENT +0.0000 Eng Unit Step 6 After selecting “Enable” the MDI system will respond with the following display. The first value represents the measurement value displayed on the left side of the display and includes the selected unit of measure. The second value represents the measurement value displayed on the right side of the display, including the selected unit of measure. Revision 4.3 3/2004 Setup of the RS232 Interface in the Journal Mode Baud Rate 9600 2400 1200 300 -40- The current baud rate selection will flash on the display. base or spreadsheet program the end of message character must be selected in accordance with the requirements of the application software. Proceed to Step 16 to input a custom end of message character. Step 7 Using the left/right arrow keys select the de- sired baud rate. The selected baud rate will flash on the display. Step 14 To use CrLf as the end of message character use Baud Rate 9600 2400 1200 300 the arrow keys to select the text “CrLf”. When selected the text “CrLf” will flash. In the above example the baud rate 9600 has been selected. End of message CrLf Prog Step 8 With the desired baud rate flashing press the Step 15 With the text CrLf flashing press the enter key. enter key. ENT ENT The MDI system will return to pressure/temperature measurement and will transmit data to the terminal, acquisition device, computer or recorder as programmed. While communicating, engineering units may be changed or the MDI system may be changed between basic pressure measurement and flow measurement. After the desired baud rate has been entered the MDI system will display: Disable ISO1745 Journal Inquiry Step 9 Using the arrow keys select the word Journal. Important Note: Invoking set up functions or dedicated keypad functions will temporarily suspend the transmission of data during the setup process. For most functions data transmission will resume when the set up is complete. However, the RS232 interface must be reenabled via the RS232 set up process to re-initiate data transmission after either automatic data logging or leak detection functions are activated. When selected the word Journal will flash. Disable ISO1745 Journal Inquiry Step 10 With the word Journal flashing press the enter key. ENT The MDI system will respond by displaying the following: Step 16 To select a programmable end of message char- acter use the arrow keys to select the text “Prog”. Report Interval xxxxxxx End of message CrLf Prog Step 11 Using the number keys enter the desired inter- val, in seconds, between data transmissions. The interval may be any value from 1 second to 65,000 seconds. In the example below the MDI system is being instructed to transmit a set of readings every 600 seconds (10 minutes). Step 17 With the text Prog flashing press the enter key ENT The MDI system will respond by displaying: EOM character xx.xx Report Interval 600 Step 18 Using the number keys enter the decimal code Step 12 With the desired time interval displayed press for the desired end of message character. A list of the decimal codes for the available ASCII characters can be found in Appendix B. the enter key. ENT Step 19 With the decimal representation of the desired The MDI system will respond by displaying: ASCII character displayed press the enter key. End of message CrLf Prog ENT The MDI system will return to the operation of pressure measurement and will transmit data to the terminal, acquisition device, computer or recorder as programmed. While communicating, engineering units may Step 13 Select the desired end of message character. For data transmission to a screen on a dumb terminal the CrLf (carriage return/line feed) is the most common option. If the data output is to be transmitted into a data- -41- Revision 4.3 3/2004 be changed or the MDI system may be changed between basic pressure measurement and flow measurement. Baud Rate 960024001200 300 Important Note: Invoking set up functions or dedicated keypad functions will temporarily suspend the transmission of data during the setup process. For most functions data transmission will resume when the set up is complete. However, the RS232 interface must be reenabled via the RS232 set up process to re-initiate data transmission after either automatic data logging or leak detection functions are activated. Section 19.4 The current Baud rate selection will flash on the display. Step 7 Using the left/right arrow keys select the de- sired baud rate. The selected baud rate will flash on the display of the MDI system. Baud Rate 960024001200 300 In the above example the baud rate 9600 has been selected. Setup of the RS232 Interface in the Inquiry Mode Step 8 With the desired baud rate selected and flashing To use the RS232 interface in the Inquiry Mode follow the steps below. press the enter key. ENT Step 1 With the MDI system on and reading pressure press the set up key. Step 9 After the desired baud rate has been entered the MDI system will display: SET UP Disable ISO1745 Journal Inquiry Step 2 Using the up/down and left/right arrow keys move through the menu selection and highlight the text “RS232” so that is flashes on the display. Step 10 Using the arrow keys select the word “Inquiry”, when selected the word will flash. Owner Alarm DateTime RS232 Disable ISO1745 Journal Inquiry Step 3 With the text “RS232” flashing press the Step 11 With the word Inquiry flashing press the enter key. enter key. ENT ENT This will activate the RS232 setup options sub menu. The MDI system will respond by displaying the following: The first screen that appears after the selection of RS232 from the main setup menu is: Inquiry Char. xx.x RS232 interface Disable Enable Step 12 Using the number keys enter the desired end of Step 4 Use the arrow keys to select the word Enable. message character in decimal code. A list of the available ASCII characters and their corresponding decimal codes is provided in Appendix B. The inquiry character acts as a signal to the MDI system to transmit a data set. The inquiry character is transmitted to the MDI system from the computer or other device controlling the data transmission activities. Select an inquiry character to be used in programming as the transmission prompt. When selected the word Enable will flash. Step 13 With the decimal representation for the desired The RS232 interface must be enabled (activated) for the MDI system to communicate with any RS232 device. When the RS232 is not in use it is recommended that the RS232 interface be disabled to conserve on power use and maximize battery life. RS232 interface Disable Enable inquiry character displayed press the enter key. ENT Step 5 With the word Enable flashing press the enter key. The MDI system will respond by displaying: ENT End of message CrLf Prog Step 6 After entering the Enable option the MDI sys- tem will respond with the following display. Revision 4.3 3/2004 -42- Step 14 Select the desired end of message character. EvntTimr Dampen LeakRate Status For data transmission to a screen on a dumb terminal the CrLf (carriage return/line feed) is the most common option. If the data output is to be transmitted into a database or spreadsheet program the end of message character must be selected in accordance with the requirements of the application software. Step 3 With the word Status flashing press the enter key. ENT Step 4 After pressing ENT the display will read: snXXXXXXdd/dd/dd fw=XX.XXhw=XX.XX Using the number keys enter the decimal code for the selected end of message character. A list of the decimal codes for the available ASCII characters can be found in Appendix B. where: snXXXXXX: serial number of the base unit. dd/dd/dd: provides the date of calibration of the base unit. fw : revision level of the firmware hw: revision level of the hardware Step 15 With the desired decimal representation for the ASCII character entered and displayed press the enter key. ENT The MDI system will return to pressure measurement and will transmit data to the terminal, acquisition device, computer or recorder as programmed. After reviewing and recording any desired information press the enter key to call up the second status screen. ENT While communicating, engineering units may be changed or the MDI system may be changed between basic pressure measurement and flow measurement. Step 5 After pressing the enter key a second time, the MDI system will respond by displaying: Important Note: Invoking set up functions or dedicated keypad functions will temporarily suspend the transmission of data during the setup process. For most functions data transmission will resume when the set up is complete. However, the RS232 interface must be re-enabled in the RS232 set up process to re-initiate data transmission after either automatic data logging or leak detection functions are activated. Section 20.0 LeftMod dd/dd/dd Type x where: dd/dd/dd: Type: Step 6 After reviewing this display and recording any desired information press the enter key to call up the third status screen. After pressing the enter key the MDI system will respond by displaying: Status The status prompt provides a means to query the MDI system as to the revision of firmware, hardware and the last calibration date of the module(s) installed. The hardware and firmware revision numbers are for factory use in determining the level of firmware and hardware in the MDI system. In addition, the ability to check calibration dates for installed Quick Select pressure modules simplifies tracking of recertification requirements for the pressure modules. Section 20.1 calibration date of the left module. relates to pressure type of module. RightMod dd/dd/dd Type x where: dd/dd/dd: Type: calibration date of the right module. relates to pressure type of module. Review and record any needed information. Reviewing Instrument Status Step 7 Press the enter key to return to the basic pres- To invoke the status selection follow the steps below. sure measurement mode. ENT Step 1 With the MDI system on and reading pressure press the set up key. Section 20.2 SET UP Battery Power Status Check The battery check key, designated BAT CK, allows for easy tracking of the power level remaining in the batteries that power the MDI system. Two, mutually exclusive, battery power options are available. These are: Step 2 Using the left/right and up/down arrow keys select the “Status” function from the setup menu. When selected the word Status will flash. 1 – Five (5) non rechargeable AA Alkaline batteries -43- Revision 4.3 3/2004 5.6 Vdc) icon appears on the instrument display. Typical remaining battery life when the low battery icon appears is approximately 1 hour with backlight off and no loop power option installed. 2 – Rechargeable NiCad battery pack To check the battery power level press the BAT CK key. The MDI system will respond by displaying: +x.xxV Section 21.0 where: +x.xx V: The MDI system is equipped with firmware that can automatically add the measured pressure values from two installed Quick Select pressure modules or to subtract the value measured by the Quick Select module installed in the right module bay from the measured value of the Quick Select value in the left module bay. This optional firmware allows for the following: battery voltage level. Battery Life* Time in Hours AA NiCad Alkaline Pack Standard Operation 48 20 4.5 24 3.25 10 9 4 3 4.5 2.5 2 1 – The ability to subtract the measured value from the left module of the measured value derived from the right module allows for simplified measurement of what are commonly referred to as “high-line” or elevated static differential pressures. A complete description of this capability is provided in Section 21.2. Total available time with: Backlight on Optional Loop supply (no load) Optional Loop supply (12mA load) Backlight & loop supply (no load) Backlight & loop supply (12 mA load) * Battery life figures are estimates based on instrument operation at a nominal temperature of 70 degrees Fahrenheit. Use of the MDI product at temperature significantly less than 70 degrees Fahrenheit will adversely effect battery life. 2 – The ability to add the measured values of the two installed Quick Select pressure module allows for the addition of a measured barometric pressure from an absolute pressure module to the measured pressure from a gauge or differential pressure. This capability can come in handy and save money by allowing the use of gauge measurement Quick Select pressure modules for absolute pressure measurement activities. Important Note: Due to the extreme variation in battery life under different operating conditions (backlight on or off or loop supply in use, it is recommended that the battery voltage value be used to determine when replacement of batteries is warranted. Section 21.1 Step 1 Install new batteries as outlined in the base unit start up section of this manual (Section 3.1). Step 3 With the MDI system operating and displaying pressure press the battery check key, designated BAT CK: BAT CK For dual module summation measurements: The worst case inaccuracy would be the sum of the inaccuracies of the two Quick Select modules used for the measurement. For example, if the measurement is made with two +0.1% full scale modules the maximum inaccuracy would be +0.2%. In actual use, it is generally acceptable to use the Root Sum of the Square (RSS) method of determining the accuracy of a multiple component measurement system. Using the RSS method the accuracy of the dual module summation is approximately +0.14% of span. The MDI system will respond by displaying: +x.xxV Note: Installation of new alkaline batteries will produce an initial voltage measurement of 6.8-7.5 Volts on the MDI system. If the value measured is significantly below this level it is likely that the batteries have degraded in storage and that they will provide less than the 48 hours of operation expected from a set of fresh, fully charged batteries. For dual module differential pressure measurement: Important Note: It is recommended that batteries be replaced or, in the case of NiCad batery pack useage that the batteries be recharged when the low voltage (approx. 3/2004 Accuracy of Dual Module Measurements The accuracy of measurements made using the difference or sum of 2 modules is a function of the full scale range of the Quick Select pressure modules used and, in the case of differential pressure measurements, the magnitude of the dp range. Step 2 Turn the MDI system on. Revision 4.3 Dual Module Functions The accuracy of the dual module differential pressure measurement is a function of the full scale range of the -44- Quick Select modules used in the measurement process and the magnitude of the dp range. In general, the accuracy for the dp measurement for dp ranges less than 10% of the rated range of the Quick select modules used is +0.37% of dp range +1 count. For dp ranges greater than 10% of the range of the Quick Select pressure module installed the accuracy of the dp measurement is +0.37 % of the dp range x 0.1(R1) where R1 equals the ratio of the module full scale to the dp full scale (Sensor full scale/dp full scale). Section 21.2 Step 7 To perform dual module differential pressure measurement select “L-R”; to exit this dp set up and return to basic pressure measurement select “NONE”. To proceed, use the arrow keys to select the text “L-R” dp Meas Mode: NONE L-R L+R Step 8 With the text “L-R” flashing press the enter key. ENT After pressing the enter key the MDI system will return to basic pressure measurement. Setting Up Dual Module Differential Pressure Measurement Step 9 To activate the dual module dp mode of op- Step 1 With the MDI system off, install the two Quick eration press the port select key one time after the set up has been complete. The MDI system will display the following text for a MDI system displaying measurement values in the psi engineering unit. Select pressure modules in the MDI base unit. Be certain to install the module so that the modules are in the desired module bays. The subtraction process is always defined as the subtraction of the measured value of the right module from that of the measured value of the left module (d/p= Left measurement value - right measurement value) L-R PSI PSI xxxx xxxx When the dual module differential firmware is active the following measurement sequence will result from pressing the PORT SELECT (PORT SEL) key. Step 2 With the modules installed, turn the MDI sys- tem on by pressing the on/off key. ON OFF First press of the port select key: L-R PSI PSI xxxx xxxx Step 3 With the MDI system on and displaying pres- sure measurement data from the two installed Quick Select modules press the Set Up key. Second press of the port select key: PSI L-R PSI xxxx xxxx SET UP Step 4 Using the up/down and left/right arrow keys Third press of the port select key: locate the section of the set up menu that includes dp measurement set up. This menu will appear on the MDI system screen as follows: PSI mA xxxx xxxx Calib Rtmodule dp Meas TCmodule Fourth press of the port select key: mA PSI xxxx xxxx Step 5 Use the arrow keys to highlight the text “dp Meas”. When highlighted the text will flash on the display. Fifth press of the port select key: PSI PSI xxxx xxxx Calib Rtmodule dp Meas TCmodule the Sixth press of the port select key will return to the first dp screen as shown below and allow repeat of the choice of available port select configurations Step 6 With the text “dp Meas” flashing press the enter key. ENT L-R PSI PSI xxxx xxxx The MDI system will respond with the following display. dp Meas Mode: NONE L-R L+R ****IMPORTANT**** When static pressure is being applied to both modules at -45- Revision 4.3 3/2004 zero differential pressure press the TARE Key to eliminate any offset caused by the elevated static to optimize measurement accuracy. play. Calib dp Meas Notes on interpreting the displayed measurement values: Step 6 With the text “dp Meas” flashing press the 1 – On a display set up with an L-R indication on one side of the display and a straight engineering unit designation on the otherside of the display the value under the L-R designation is the resulting value from the subtraction of the right Quick Select measurement from that of the left Quick Select measurement. The value on the opposite side of the display, under the engineering unit without the L-R prefix represents the pressure measurement from the Quick Select pressure module installed in the corresponding side of the MDI system. By using the port select function it is possible to read the differential pressure measurement value as well as either of the inputs independently. enter key. ENT The MDI system will respond with the following display. dp Meas Mode: NONE L-R L+R Step 7 To perform pressure measurement using the dual module summation mode select “L+R”; to exit this dp set up and return to basic pressure measurement select “NONE”. To proceed, with use the arrow keys to select the text “L+R” 2 – Due to the length of the engineering unit designation when the d/p is expressed in a user engineering unit the L-R indication will be not be present on the display. The display is limited to 16 characters/line and cannot display both the L-R and a U_XXXXXX engineering unit label. Section 21.3 dp Meas Mode: NONE L-R L+R Step 8 With the text “L+R” flashing press the enter key. ENT After pressing the enter key the MDI system will return to basic pressure measurement. Setting Up Dual Module Summation Pressure Measurement Step 9 To activate the dual module dp mode of op- Step 1 With the MDI system off, install the two Quick eration press the port select key one time after the set up has been complete. The MDI system will display the following text Select pressure modules in the MDI system. As this is a summation process the modules may be in either module bay. L+R Step 2 With the modules installed, turn the MDI sys- tem on by pressing the on/off key. PSI xxxx When the dual module summation firmware is active the following measurement sequence will result from pressing the PORT SELECT key Step 3 With the MDI system on and displaying pres- sure measurement data from the two installed Quick Select modules press the Set Up key. First press of the port select key: SET UP L+R PSI xxxx Step 4 Using the up/down and left/right arrow keys locate the section of the set up menu that includes dp measurement set up. This menu will appear on the MDI system screen as follows: PSI xxxx Second press of the port select key: PSI L+R PSI xxx x xxxx Rtmodule Third press of the port select key: PSI xxxx Step 5 Use the arrow keys to highlight the text “dp Meas”. When highlighted the text will flash on the dis- mA xxxx Fourth press of the port select key: Revision 4.3 3/2004 PSI xxxx for a MDI system displaying measurement values in the psi engineering unit. ON OFF Calib dp Meas Rtmodule -46- mA xxxx PSI xxxx Data Log Backup Battery is Low Fifth press of the port select key: PSI xxxx When this message appears on the display the battery should be replaced as soon as possible. Consult Section 24.2 for details on battery replacement. Acceptable batteries are listed in section 24.2. PSI xxxx The Sixth press of the port select key will return to the first dp screen as shown below and allow repeat of the choice of available port select configurations L+R PSI xxxx Section 22.1 The sequential data logging function provides three means of capturing and storing measurement data. These are: PSI xxxx • automatically at a defined time interval • automatically with delayed start • manually at the push of the data store key Notes on interpreting the displayed measurement values: 1 – On a display set up with an L+R indication on one side of the display and a straight engineering unit designation on the other side of the display the value under the L+R designation is the resulting measurement for the summation of the left Quick Select measurement added to the measurement value of the right Quick Select module. The value on the opposite side of the display, under the engineering unit without the L+R prefix, represents the pressure measurement from the Quick Select pressure module installed in the corresponding side of the MDI system. By using the port select function it is possible to read the summation pressure measurement value as well as either of the inputs independently. In the automatic data logging mode, data logging can be programmed to occur at a time interval of from 0.1 to 65,000 seconds. The manual mode of data logging allows storage of the displayed measurement data at the push of a key. In the sequential data logging mode the MDI has the capacity to store a maximum of 714 data sets with the time/date stamp function disabled. If the time date stamp is enabled the MDI system data logging memory can store a maximum of 387 data sets. Each data set includes the following; the record number, the measured value and the engineering units of the measurement value. If the time/date stamp is enabled the time (hours/minutes/ seconds) and date (Year/Month/Day) are included with the logged measurement data. 2 – Due to the length of the engineering unit designation when the d/p is expressed in a user engineering unit the L+R indication will be not be present on the display. The display is limited to 16 characters/line and cannot display both the L+R and a U_XXXXXX engineering unit label. Section 22.0 Sequential Data Logging Function (Optional) When used in conjunction with the Event Timer function (see Section 25) the MDI system can be set up to take data during a selected future time period at an operator programmed time interval. For example, the combination of data logging and event timer provides the ability to set up the MDI system to take pressure measurements from 9:00 PM to 11:00 PM at a timed interval of one data set every 10 seconds, without operator intervention. Data Logging Function (Optional) There are two basic ways to perform data logging with the MDI system. These are • sequentially ungrouped storage • grouped for certification generation of an instrument under test. Section 22.2 Sequential data logging is detailed in this section (Section 22) of this manual. Setting up the Data Logging Function (Optional) The setup menu for the data logging function is accessed through a dedicated key on the keypad of the MDI system. This key has the designation DATA LOG. Pressing the data log key provides access to the complete data logging set up menu. Data logging with the enhanced certification generation data logging is detailed in Section 23. Note: Base units equipped with optional data logging include a lithium battery to back up the Random Access Memory (RAM) used to store data logged values. If the battery voltage is low the following message will appear on the DATA LOG key pressed. DATA LOG When the data log key is pressed the MDI system will respond with one of two prompt screens. If the unit is not equipped with the certification generation enhancement the calibrator will display: -47- Revision 4.3 3/2004 Line 1 Line 2 Line 3 Auto Review Label Step 2 Using the up/down and right/left arrows browse Manual Off Erase through the data log menu and locate the word “label”. The menu line that contains the label function appears as: Label If the MDI system is equipped with the certification generation data logging enhancement the response will be: Step 3 Using the left/right arrow keys select the word Label. When selected the word label will flash. Select Mode Std CertGen Label ENT The MDI system will respond by displaying: ENT Enter Label --------------- To access the certification generation capability of the MDI, using the right pointing arrow key highlight the text CertGen and with it flashing press the enter key. Step 5 Use the Up/down arrows to enter letters, numbers or a blank and the right/left arrows to move the cursor to the position in which the character is to be entered. When the label information is displayed press the enter key. ENT The up/down and left/right arrows can be used to choose the desired selection from the data log set up menu. Information on the function of each of the above menu options follows. ENT The label is now stored and will appear in sequence with the corresponding data logged values when the stored information is viewed on the display or uploaded to a computer. Proceed to section 23 of this manual for details on the certification generation mode of data logging. Proceed through the balance of Section 22 for details on the use of the capabilities provided by the standard sequential data logging operation mode. Section 22.4 Labeling Function – Standard Data Logging Mode Automatic data logging can be accomplished by the following procedure. Step 1 With the MDI system on and reading pressure press the data log key on the keypad. DATA LOG The MDI system will respond by displaying: To enter a label follow the steps below. THE LAST DATA LOG MENU SCREEN USED. Step 1 With the MDI system on and reading pressure/ temperature, press the data log key on the MDI system keypad. Step 2 Using the up/down and right/left arrows browse through the data log menu and locate the word “Auto” The menu line with the word “Auto” appears as: DATA LOG Auto In response the MDI system display will respond: Manual To initiate automatic, time interval, data logging select the word “Auto” by using the arrow keys. When selected THE LAST DATA LOG MENU SCREEN USED 3/2004 Automatic Data Logging – Standard Data Logging Mode The automatic data logging function allows for the automatic, unattended logging of measurement data. The data logging process commences immediately after the completion of the set up of the automatic data function to be performed. The label option allows the input of an alphanumeric label of up to 16 characters in length. Multiple labels can be used. For example, a label can be entered and data taken to be stored under the label. After completion of the measurement activities to be included under the first label another label may be entered and the next data set will follow that label in the data storage and transmission sequence. Label information can be viewed on the MDI system display and is transmitted when stored values are reviewed via the computer upload program detailed in Section 24. Revision 4.3 Erase Step 4 With the word Label flashing press the enter key. To perform “standard” sequential manual or time based data logging highlight the text “Std” and with it flashing on the display press the enter key. Section 22.3 Erase -48- the word “Auto” will flash on the display. For manual, operator controlled, data entry proceed to Section 22.5. Auto Date/Time Stamp Disable Enable Manual In this example we have opted to forego the date/time stamp of the stored data values. Step 3 With the word ‘‘Auto” flashing press the enter key. Step 9 With the desired format displayed press the ENT enter key. ENT The MDI system will respond by displaying: Enter Interval sec. xxxxxx The MDI system will immediately begin storing the pressure data requested at the desired interval until instructed to stop the data logging process. Step 4 Using the number keys enter the desired time Step 10 To stop the data logging process press the Data interval in seconds. The interval may be from 0.1 seconds to 65,000 seconds. Log key. The MDI system will respond by displaying: Auto Manual Review Off Enter Interval sec. 12345 Step 11 Using the arrow keys select the word off. When Step 5 After the desired time interval is shown on the selected the word “Off” will flash. display press the enter key. Auto Manual Review Off ENT Step 6 The MDI system will respond by displaying the Step 12 With the word “Off” flashing press the enter following: key to disable the data log function. Readings to Log NoneLeftRghtBoth ENT Automatic, time interval based, data logging has now been terminated. Step 7 Using the arrow key select the desired Quick Select pressure modules to be monitored and logged. Readings to Log NoneLeftRghtBoth Section 22.5 Manual Data Logging Data Logging Mode – Standard In this example we have opted to log the output from both Quick Select pressure modules. Follow the procedure below to conduct manual, operator controlled, data logging. Step 8 With the Quick Select module(s) to be moni- Step 1 With the MDI system on and reading pressure press the data log key. tored selected and flashing press the enter key. DATA LOG ENT The MDI system will respond by displaying: The MDI system will respond by displaying: Date/Time Stamp Disable Enable THE LAST DATA LOG MENU SCREEN USED Step 2 Using the up/down and right/left arrows browse Note: If data storage is done with the time/date stamp option activated, the MDI system can store 387 sets of pressure measurements. If data storage is done without the time/date stamp option activated the MDI system can store 714 sets of pressure measurements. A data set is the full package of information defining the logged output from one module. through the data log menu and locate the word “Manual”. The menu line with the word “Manual” appears as: Auto Manual To initiate manual data logging select the word “Manual” using the arrow keys. When selected the word “Manual” will flash on the display. Using the arrow keys select the desired storage format. The desired format will flash when selected. Auto Manual Step 3 With the word “Manual” flashing press the -49- Revision 4.3 3/2004 DATA LOG enter key. ENT The MDI system will respond by displaying: The MDI system will respond by displaying: Auto Manual Review Off Readings to Log NoneLeftRghtBoth Step 9 Using the arrow keys select the word “Off”. Step 4 Using the arrow key select the desired Quick When selected the word “Off” will flash. Select modules to be monitored. Auto Review Readings to Log NoneLeftRghtBoth Manual Off Step 10 With the word “Off” flashing press the enter In this example we have opted to log the output from both Quick Select pressure modules. key to disable the data log function. ENT Step 5 With the Quick Select module(s) to be moni- tored and logged selected and flashing press the enter key. Manual, operator initiated, data logging has now been terminated. ENT Section 22.6 The MDI system will respond by displaying: Date/Time Stamp Disable Enable Review of Stored Data – On Instrument Display Standard Data Logging Mode Data stored in either the manual or automatic data logging functions can be reviewed on the display of the MDI system or up loaded to an IBM compatible PC. For information regarding uploading of stored data to a personal computer skip to Section 24.0. Note: If data storage is done with the time/date stamp option activated the MDI system can store 387 sets of pressure measurements. If data storage is done without the time/date stamp option the MDI system can store 714 sets of pressure measurements. Sets of pressure measurement data include all the data stored to define the output of one module. The MDI system provides the ability to review, on the display, the data logged measurement values. To review stored values follow the procedure below. Step 1 With the MDI system on and reading pressure Using the arrow keys select the desired storage format. The desired format will flash on the display when selected. press the data log key on the keypad. DATA LOG Date/Time Stamp Disable Enable The MDI system will respond by displaying the following: In this example we have opted to forego the date/time stamp of the stored data values. THE LAST DATA LOG MENU SCREEN USED Step 6 With the desired format selected and flashing Step 2 Using the up/down and right/left arrows browse press the enter key. through the data log menu and locate the word “Review.” The menu line with the word “Review” appears as: ENT Review Step 7 The MDI system is now ready to log data on To initiate the review process select the word “Review” using the arrow keys. When selected the word “Review” will flash. command. To store a measured pressure, flow, leak test, switch test, min/max data set, current or voltage value press the data store key. Review DATA STORE enter key. ENT press the Data Log key. 3/2004 Off Step 3 With the word “Review” flashing press the Step 8 To disable the manual data logging capability Revision 4.3 Off -50- Step 4 The MDI system will respond by displaying the 1) The remaining data will stay in the original sequence with blank data fields left where the stored data points have been deleted. last data logged value stored in memory. The display of the data logged value will appear as follows: +xxx +123456 time eng 2) The MDI system will not compress the data to the new, smaller data set. 3) The newly erased fields cannot be used for the storage of new data values until a complete data erase has been done. where: +xxx = the 1-3 digit number representing the record number for the data point in the sequence of logged data. +12345 = stored measurement value. eng = is the engineering unit of the stored value. time = time pressure measurement taken, when date/time stamp was enabled. The process to delete selected data points is as follows: Step 1 With the MDI system on and reading pressure press the datalog key on the MDI system keypad. DATA LOG Important Note: If both the left and right pressure/flow or electrical measurements are logged the MDI system will store the data from the left module or side of the display in the odd numbered records and the data from the right module or right side of the display in the even numbered records. There is no stored indication of right or left module for the stored data values. In response the MDI system will display: THE LAST DATA LOG MENU SCREEN USED Step 2 Using the up/down and right/left arrows browse through the data log menu and locate the word “Review.” The menu line with the word Review appears as: Step 5 To review data logged values use the arrow Review keys to browse through the stored values. Pressing the corresponding arrow key will result in the following action in the data log review process. Using the arrow keys select the word Review. When selected the word Review will flash. Auto Manual Review Off Key Result < brings the next lowest stored address value to the display. > brings the next highest stored address value to the display. ^ skips 10 stored values in increasing address direction. v skips 10 stored values in decreasing address direction. % brings first data point to display. mA/V brings last data point to display. Step 3 With the word review flashing press the enter key. ENT Step 4 Data points may be browsed through by using the keys as indicated below: Key Result > brings the next lowest stored address value to the display. < brings the next highest stored address value to the display. ^ skips 10 stored values in increasing address direction. v skips 10 stored values in decreasing address direction. % brings first data point to display. mA/V brings last data point to display. Step 6 When the review process is complete press the data log key to return to normal pressure measurement. DATA LOG Section 22.7 Off Erasing of Selected Stored Data Standard Data Logging Mode In some instances the ability to delete specific stored data points can be useful. In particular, this can be the case when data of questionable integrity has been stored in the data log memory. The MDI system allows for the deletion of specific operator selected stored data points. There are limitations to this capability. To erase a stored data value press the clear entry key, designated CE, while the data to be deleted is displayed. CE The MDI system will respond by displaying: These limitations are as follows: -51- Revision 4.3 3/2004 ***WARNING*** Erase This Entry Ent if OK Pressing the enter key with the erase command flashing will irrevocably erase all stored data. If it is required that any of the stored data be retained select the word “cancel” and press the enter key on the keypad. Step 5 To delete the displayed stored data point press the enter key. ENT Erase ALL Entrys Cancel Erase The MDI system will respond by displaying: + xxx Erased Entry Step 6 To erase all stored data press the enter key. ENT Step 6 Using the arrow keys additional data points can The MDI system will now resume standard pressure measurement activities. be reviewed and kept or deleted as desired. Step 7 To exit this function press the data log key. Section 23.0 DATA LOG The certification generation operating mode is designed to simplify the capture of measurement data taken during the calibration for easy generation of calibration certification sheets. It has been designed for use with FieldLink 2 software. However, even without the FieldLink 2 software the certification generation mode of data logging will simplify calibration activities. Performance of calibrations will be facilitated through operator prompts provided by the MDI when used in the enhanced certification generation mode. Further, the manipulation and use of calibration data is facilitated by the enhanced data labeling capability provided by this mode of operation. The MDI system will now resume normal pressure measurement activities. Section 22.8 Erasing All Stored Data Standard Data Logging Mode Step 1 With the MDI system on and reading pressure press the data log key. DATA LOG In response the MDI system will display: THE LAST DATA LOG MENU SCREEN USED Section 23.1 Step 2 Using the up/down and right/left arrows browse through the data log menu and locate the word “Erase”. The menu line with the word Erase appears as: Label data press the data log key. Erase DATA LOG Erase. When selected the word Erase will flash. The MDI will respond to the data log entry by displaying the following. Erase Step 4 With the word Erase flashing press the enter key. Select Mode Std CertGen ENT “Std” represents standard sequential data logging without the benefit of formatting to aid in the calibration process. Standard data logging is most commonly used for time based data logging of processes or system controls or sampling of such things as HVAC ducts. The MDI system will respond by displaying: Erase ALL Entrys Cancel Erase The word cancel will be flashing. Select the word erase using the arrow keys to erase stored data. “CertGen” represents the Certification Generation mode of data logging. This is the mode that is detailed here. To review or use standard data logging refer to Section 22 of the users manual. Step 5 Using the right arrow select the word Erase and press the enter key. ENT Revision 4.3 3/2004 Set Up and Use of Certification Generation Data Logging Mode Step 1 With the MDI on and displaying measurement Step 3 Using the left/right arrow keys select the word Label Certification Generation Enhanced Data Logging Mode To access the “CertGen” capabilities use the arrow keys -52- to highlight the text “CertGen” . memory used. As data is added to the data log memory during the data acquisition process the percent level will increase. This will be seen on the display as each data set is added to the data log memory. In addition the complete memory available summary as shown above will be displayed each time the “CertGen” process is initiated. Select Mode Std CertGen Step 2 With the text “CertGen” flashing press the enter key. ENT The MDI can store a minimum of 10 complete calibrations including: 10 “as received” data points, 10 “as left” data points, tag name, ambient temperature at time of “as found” tests, ambient temperature at time of “as left tests”and the indication of the action taken. The MDI will respond by displaying: CertGen Erase Exit The text “CertGen” will be flashing, indicating that pressing the enter key will activate the “CertGen” data logging process. Step 5 Pressing any key will clear the memory avail- able summary from the display and allow continuation of the “CertGen” process. Selecting and entering the “Exit” option will return the calibrator to standard measurement activities. After pressing any key the MDI will respond by displaying the following. Selecting the text “Erase” will allow deletion of any previous data logged information. The “Erase” selection deletes all data logged information, including any information stored from either “Std” or “CertGen” operating modes. If “Erase “ is selected the MDI will respond by displaying: New Tag Previous Tag The text “New Tag” will automatically be selected and be flashing on the display when the “CertGen” process is initiated. Erase All Entrys Cancel Erase Step 6 To initiate the data logging of measurement in- formation for the generation of a certification sheet press the Enter key with the text “New Tag” flashing. Selecting “Cancel” will result in the MDI reverting to basic measurement activities. Selecting “Erase” will result in the deletion of ALL stored data logging information. ENT The MDI will respond by displaying the following. Enter Tag Name - - - - - - - - - - - - - - - Step 3 Using the arrow keys, highlight the text “Cert- Gen to proceed with the certification generation process ”. CertGen Exit Erase Step 4 With the text “CertGen” flashing on the display Use the up and down arrow keys to enter letters and or numbers to define an instrument tag name. The entry/ selection sequence press the enter key. is as follows: ENT Up/down arrows provide access as follows: The MDI will respond by displaying the following: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, _, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z xxx Rec Used xxx% xxx Points left This display provides an indication of the approximate data logging memory available for storage of additional measurement and calibration data. The number of actual points that may be stored will vary based on the length of tag names assigned and whether or not the ambient temperature logging option has been exercised. By maintaining pressure on the up/down arrow the displayed number or letter will continue to change until the last character has been reached. By pressing and releasing the up/down arrow a single step from letter or number can be accomplished. The percent indication is the percent of data logging -53- Revision 4.3 3/2004 The left/right arrow keys allow for entry of alpha numeric data in any of the 16 available positions. temperature and electrical measurement data). In addition to storing the measurement test data the heading or label information for each calibration is also stored in memory. This information includes: tag name, ambient temperature, “as found” label, “as left” label and action taken. The tag name can be any combination of alphabetical or numeric entries. The maximum entries per tag name is 16 characters. The tag name is the key designation under which all subsequent calibration for this calibration data set will be organized. Tag names or tag numbers are routinely identifiers assigned to measurement instruments when put into service within a facility. If no tag identifier is assigned to the device to be tested it is recommended that one be created by combining some abbreviation for the manufacturer’s name and the instrument serial number for the device to be tested. The use of the “CertGen” firmware requires the entry of a tag name for each device to be calibrated. Prior to initiating the calibration process the base unit will prompt the operator with a screen providing the remaining storage capacity for data in terms of number of data points. If the operator enters a number of test points that exceeds the available memory the following message will be displayed: Value exceeds # remaining points Pressing any key will return the prompt requesting entry of the number of test points to be run. The number of test points entered must be less than or equal to the remaining test points available. Memory requirement for the calibration heading information are already factored into the information provided regarding the number of test points remaining. The number displayed may be completely allocated to measurement data without worry about leaving space for needed labelling. Use the up/down and left/right arrows to enter a tag name, as shown here. Enter Tag Name AB12345 - - - - - Step 7 With the desired tag name displayed press the enter key. ENT Step 8 Using the numeral keys enter the desired number of “as found” data points to be logged. In this example 10 data sets will be stored in the calibrator’s data logging memory. The MDI will respond by displaying: Collect Readings AsFound AsLeft Enter #of Testpts 10 The text “AsFound” will be flashing when this screen appears. Select “AsFound” to store the initial (uncorrected/unadjusted) calibration data. To collect “as found” data press the enter key with the text “AsFound” flashing on the display. Step 9 With the desired number of test points entered and displayed press the enter key. ENT ENT The MDI will respond by returning basic measurement operation. The MDI will respond by prompting the operator to enter the number of “as found” data points to be taken. A data point consists of the pressure measurement as read on the instrument and the current or voltage output from the device under test as measured on the instrument. Therefore, each data point is actually two (2) measurement values. The prompt appears as follows. Step 10 Prior to beginning the collection of data the MDI should be set up to display the information to be logged in the MDI’s memory. For example, in standard transmitter calibration the calibrator display will routinely display the measured value from the Quick Select pressure module being used as the pressure standard and the measured current (mA) value output from the transmitter (input to the mA and COMM jacks on the calibrator front panel) as a result of the pressure input applied to the transmitter. Therefore the MDI will typically be displaying either of the two following sets of information when performing the calibration process. Enter#of Testpts .000000 The number of test points can be any value from 1 to 21. Important Note: The MDI can store sufficient measurement data to calibrate 10 devices each with 10 “as found” and 10 “as left” data points (corresponding to 200 test points. Each test point includes both pressure/ Revision 4.3 3/2004 mA xxxxx -54- PSI yyyy the upward pointing arrow to move in increasing order 10 data points at a time. or PSI yyyy mA Done: Completes the collection of “AsFound” measurement data. See step 13 for continuation of the “CertGen” process. xxxxx Redo: Provides the ability to discard all the “As Found” data taken under the tag name being tested. Prior to deleting the data the operator will be prompted by the query. where: yyyy= xxxx= the pressure measurement value the current measurement value (output from the device under test) ERASE all data Yes No Step 11 With the data to be logged shown on the dis- play, introduce the first pressure/temperature measurement to be logged. After the system has stabilized press the data store key. Selecting yes will result in the deletion of the just taken “as found data”. DATA STORE Step 13 After selecting “Done” the MDI will offer the opportunity to enter the ambient (environmental) temperature at the time the calibration is being done. This is accomplished by the display of the following. The MDI will briefly show the following information on the display each time a measurement set is logged to memory. Ambient Temperature Skip Enter xxyy% 1234 1234 To skip the act of logging the ambient temperature value select the text “Skip” and press the enter key. where: xx = the number of data points (records) and data fields used for calibration labelling information stored in this calibration data set. yy = the percent of data logging memory allocated to stored data. ENT To “capture” the ambient temperature and make it part of the calibration record use the arrow keys to select the text “Enter”. Ambient Temperature Skip Enter 1234 = the measured values in the engineering units chosen. Repeat the process, subjecting the MDI and the device under test to the controlled pressure/ temperature input for each test point to be taken and store the measured values by pressing the data store key for each measurement set to be logged. Step 12 Step 14 To proceed with the entry/recording of the ambient temperature value with the text “Entry” flashing press the enter key. ENT Step 15 DATA STORE Note: If the MDI has a GQS-RT or TC temperature mod-ule and the probe is installed it will automatically offer the opportunity to store the measured temperature value. After the last set of data to be logged has been stored the MDI will prompt the operator with the following display. AsFound readings View Done Redo If a different value is to be entered or if the MDI is not equipped with a temperature module the temperature can be entered via the numeral keys on the keypad. With manual temperature entry completed the display will look as follows: The options available are as follows: View: Allows operator to scan through the stored values using the arrow keys. Use the left pointing arrow to move in decreasing order from data point to data point. Use the down-ward pointing arrow to move in decreasing order 10 data points at a time. Use the right pointing arrow to move in increasing order from data point to data point. Use Enter Amb Temp oF 73.4 for an ambient temperature of 73.4 degrees Fahrenheit. -55- Revision 4.3 3/2004 ENT Step 16 With the desired temperature value displayed press the enter key. The MDI will respond by displaying: ENT Enter#of Testpts The MDI will respond by displaying: .000000 Action Taken None Recal Repl Step 20 Use the numeral keys to enter the number of “as left” data records to be stored. The number selected can be any value between 1 and 21. In this example 5 “As Left” data records will be taken and stored in the MDI’s memory. Using the arrow keys select the desired course of action. None: if no action is required and the device under test is performing satisfactorily. Enter#of Testpts Recal: If adjustments are to be made to the device under test. 5 Repl: If it has been determined that the tested device must be taken off line and replaced. Step 21 The selected entry will become part of the stored data for the calibration being done against the previously entered tag name. logged shown on the display, apply the first pressure/ temperature measurement to be logged. After the system has stabilized, press the data store key. Be certain that the desired data to be logged is shown on the MDI’s display. With the data to be DATA STORE Step 17 With the desired selection highlighted press the enter key. ENT The MDI will briefly show the following display. xx yy% 1234 1234 The MDI will respond by displaying: Collect As Left Yes No AsFnd where: xx = the number of data sets (records) stored in this calibration data set. yy = the percent of data logging memory allocated to stored data. 1234 = the measured values in the engineering units chosen. Step 22 Repeat the process, subjecting the MDI and the device under test to the controlled pressure/ temperature input for each test point to be taken and store the measured values by pressing the data store key for each measurement set to be logged. Use the arrow keys to highlight the desired selection. The typical selections are: Yes: If recalibration is selected as the action taken. Proceed to Step 18 for details on taking “As Left” data. No: If replace is selected as the action taken. AsFnd: If no action is taken because the device under test was found to be within specification. Selecting “AsFnd’’ will result in the following comment being added to the calibration record for the device under test: DATA STORE After the last set of data to be logged has been stored the MDI will prompt the operator with the following display. “Use AF for AL” Step 18 To take “As Left” data and store the AsLeft readings\ View Done Redo measured values in the MDI’s memory use the arrow key to high-light the text “yes” under the “As Left” data prompt screen. The options available are as follows: ColÐlect As Left Yes No AsFnd View: Allows operator to scan through the stored values using the arrow keys. Use the left pointing arrow to move in decreasing order from data point to data point. Use the downward pointing arrow to move in decreasing order 10 data points at a Step 19 With the text “yes” flashing press the enter key Revision 4.3 3/2004 -56- time. Use the right pointing arrow to move in increasing order from data point to data point. Use the upward pointing arrow to move in increasing order 10 data points at a time. for an ambient temperature of 73.4 degrees Fahrenheit. Step 26 With the desired temperature value displayed press the enter key. ENT Done: Completes the collection of “As Found” measurement data. See step 13 for continuation of the “CertGen” process. The MDI will respond by displaying the following: Action Taken None Recal Repl Redo: Provides the ability to discard all the “As Found” data taken under the tag name being tested. Prior to deleting the data the operator will be prompted by the query. Using the arrow keys select the desired course of action. Select: None: if no action is required and the device under test is performing satisfactorily. Recal: If adjustments are to be made to the device under test. Repl: If it has been determined that the tested device must be taken off-line and replaced. ERASE all data Yes No Selecting yes will result in the deletion of the just taken “as left”data. Step 23 After selecting “Done” the MDI will offer the opportunity to enter the ambient temperature at the time the “as Left” calibration is done. This is accomplished by the display of the following prompt screen. The selected entry will become part of the stored data for the calibration being done against the previously entered tag name. Ambient Temp Skip Enter Step 27 With the desired selection highlighted press the enter key. ENT To skip the logging of the temperature information select the text “Skip” and press the enter key. After completion the MDI will once again display the memory available summarization screen as follows: ENT xxx Rec Used Points left To “capture” the ambient temperature and make it part of the calibration record use the arrow keys to select the text “Enter”. xxx% This display provides an indication of the approximate data logging memory available for storage of additional measurement and calibration data. Ambient Temp Skip Enter Step 28 Press any key to return to the first “CertGen” Step 24 To proceed with the entry/recording Screen as follows: of the ambient temperature value with the text “Enter” flashing press the enter key. New Tag Previous Tag ENT Step 25 Highlighting and selecting: Note: If the MDI has a GQS-RT or GQS-TC1 temperature module installed, it will automatically offer the opportunity to store the measured value the base unit is receiving from the RTD or thermocouple. New Tag: will result in initiating a new calibration certification process. Previous Tag: will allow the review of data previously taken for specifictag names. If a different value is to be entered or if the MDI is not equipped with an RTD probe and GQS-RT module the temperature can be entered via the numeral keys on the keypad. With manual temperature entry completed the display will look as follows: Press the clear entry key to return to standard MDI measurement and test activities. CE Section 24.0 Enter Amb Temp oF 73.4 -57- MDI System Set Up for Uploading Stored Data Into an IBM Compatible PC Revision 4.3 3/2004 The following steps will allow you to upload stored data to an IBM compatible PC. text ISO1745. When selected the text ISO1745 will flash. Disable ISO1745 Journal In¼qui½ry Step 1 Turn the power off on the base unit. Step 2 Connect the 9 pin RS232 cable to the MDI Step 11 With the text ISO1745 flashing press the system and to a serial port on the PC. enter key. ENT Step 3 Turn the power to the base unit on and with the MDI system on and reading pressure press the setup key. The MDI system is now set up for data logging. Next, the computer to be used for uploading must be prepared. SET UP Section 24.1 Step 4 Using the arrow keys locate and select the text RS232. When selected the text RS232 will flash. Important Note: Information regarding the installation and use of the upload utility software is provided in the supplemental software manual provided with the product. Please consult the User’s Manual for the Upload Utility shipped with the MDI system. Owner Alarm DateTime RS232 Step 5 With the text RS232 flashing, press the enter key. ENT Section 24.2 The MDI system will respond by displaying: Step 6 Using the arrow keys select the word Enable. When selected the word Enable will flash. ***WARNING*** RS232 interface Disable Enable Replace battery with recommended batteries only. Use of another battery may present a risk of fire or explosion. Replacement batteries are available through most industrial supply and electronic supply distributors. Caution, battery may explode if mistreated. Do not recharge, disassemble or dispose of in fire. Step 7 With the word Enable flashing press the enter key. ENT The MDI system will respond by displaying: Note: Baud Rate 9600 2400 1200 300 1- Installation category 1 2- Pollution degree 2 ***CAUTION*** Step 8 Using the left/right arrow keys select the de- This procedure should only be performed by a trained electronic technician. The MDI incorporates CMOS components that can be damaged by electrostatic discharge. Technicians performing battery replacement must be properly grounded to avoid damaging sensitive electronic components. sired baud rate. When selected the baud rate will flash. Baud Rate 9600 2400 1200 300 In the above example 9600 baud has been selected. Step 9 With the desired baud rate flashing press the Follow the procedures below to change the battery back up unit. enter key. ENT Note: The MDI system should be turned off prior to initiating battery replacement procedure. The MDI system will respond by displaying: Disable ISO1745 Journal Inquiry Step 1 Turn the MDI indicator bottom side up and locate the four (4) phillips head screws that secure the upper and lower case halves together. Step 10 In order to use the upload software provided with the MDI system use the arrow keys to select the 3/2004 Battery Back Up Replacement When the display indicates that the battery back up is low the lithium battery should be replaced as soon as possible. The battery is a standard 3 volt lithium battery. Replacement should be made with a Panasonic BR1225 or CR1220 battery. RS232 interface Disable Enable Revision 4.3 Installing and Operating Upload Software -58- Step 2 Remove and place aside the four Phillips head The event timer sets the starting and ending times for unattended monitoring to be performed during a future time period. The Event Timer function is programmed as follows. screws. Step 3 Holding the two case halves together, turn the instrument over (right side up) and slip off the top of the case. Step 1 With the MDI system on and measuring pres- sure press the set up key. Step 4 Note the orientation of the cables and the con- SET UP nector used for each cable. Then, carefully disconnect the two ribbon cables. One cable connects the keypad to the main board and the second connects the display to the main board. Step 2 Using the arrow keys select the event timer, designated EvntTimr, option on the set up menu. When selected the text “EvntTimr” will flash on the display. Step 5 Locate battery to be replaced. The battery unit is near connection P6, immediately to the right of pin 10. EvntTimr Dampen LeakRate Status Step 6 Remove depleted battery and install replace- ment unit. Be certain to install appropriate 3 volt lithium battery as outlined in introduction to this section. Step 3 With the text EvntTimr selected and flashing on the display press the enter key. Step 7 Remove jumper on connection P6 between pin ENT 7 and pin 8. Wait 2-3 seconds and reinstall jumper in original location. The MDI system will respond by displaying: HHMMSS XXXXXX Step 8 Carefully reconnect cable between printed circuit board and keypad. Step 9 Carefully reconnect cable between printed where: HH = hours in military time MM = minutes (0-60) SS = seconds (0-60) circuit board and display. Step 10 Replace top half of case. Step 11 Holding the two case halves together, turn the Use the number keys to enter the hours, minutes and seconds in the corresponding entry fields to establish the start time. unit over (bottom side up). Step 12 Reinstall four (4) screws used to connect the top and bottom sections of case. Step 4 When entered the start time will look as follows Step 13 Follow steps in Section 3.5 to reinstall the for a time of 9:30 PM. desired Quick Select pressure modules. 213000 XXXXXX Step 14 Power unit up and down three (3) times to en- able the battery backup logic. appears on the display press the enter key. Event Timer Function ENT The Event Timer allows for unattended data logging during a desired time period. For example, if it is necessary to monitor the pressure levels of a flue or HVAC duct during a specific time period the Event Timer, used in combination with the data logging function, can satisfy this requirement. The MDI system will respond by displaying: HHMMSS XXXXXX Stop Step 6 Enter the desired stop time using the number keys. When properly entered a stop time of 11:30 PM will look as follows: Delayed initiation of unattended measurement activities requires the set up of both the Event Timer and data logging function. Section 25.1 Start Step 5 When the desired start time has been input and Battery replacement is now complete. Section 25.0 Start HHMMSS 233000 Event Timer Set-Up stop Step 7 When the desired stop time has been input and To program the MDI system for delayed monitoring and data logging follow the steps below. appears on the display of the MDI system press the enter key. -59- Revision 4.3 3/2004 ENT 10 minutes. Step 5 After the desired time interval is entered and The MDI system will respond by displaying: shown on the display press the enter key. Event Timer Disable Enable ENT The MDI system will respond by displaying the following: Step 8 Use the right arrow key to select the word En- Readings to Log NoneLeftRghtBoth able. When selected the word Enable will flash on the display. Event Timer Disable Enable Step 6 Using the arrow key select the desired Quick Select Modules to be monitored. Readings to Log NoneLeftRghtBoth Step 9 With the word Enable flashing press the enter key. ENT Section 25.2 In the above example the left module has been designated as the Quick Select Module to be monitored for data logging. Data Log Set Up for Operation with the Event Timer Step 7 With the Quick Select module(s) to be moni- Automatic data logging must be set up to control the data logging parameters to be followed in time delayed data logging. For delayed data logging the logging function must be set up as follows. tored selected and flashing press the ENT key. ENT After the Quick Select pressure module(s) to be monitored has been entered the MDI system will respond by displaying: Step 1 With the MDI system on and reading pressure press the data log key. DATA LOG Date/Time Stamp Disable Enable The MDI system will respond by displaying the following: Note: If data storage is done with the time/date stamp option the MDI system can store 387 sets of pressure measurements. Sets of pressure measurement data include pressure measurement from the left, right or both modules. THE LAST DATA LOG MENU SCREEN USED Step 2 To program the MDI system for time delayed data logging use the arrow keys to locate and select the word “Auto” in the data log menu. When selected the word Auto will flash on the display. If data storage is done without the time/date stamp option the MDI system can store 714 sets of pressure measurements. Sets of pressure measurement data include pressure measurement from the left, right or both modules. Auto Manual Review Off Step 3 With the word Auto flashing press the enter key. Step 8 Using the arrow keys select the desired storage ENT format. The desired format will flash on the display when selected. The MDI system will respond by displaying: Date/Time Stamp Disable Enable Enter Interval sec. xxxxxx In the above example the date time stamp function has been enabled and the stored data will be labeled with time date information in the database. Step 4 Using the number keys enter the desired time in- terval in seconds. The interval may be from 0.1 seconds to 65,000 seconds. Step 9 With the desired format displayed press the Enter Interval sec. 600 enter key. ENT The above example shows an interval of 600 seconds or Revision 4.3 3/2004 After pressing the enter key immediately turn the MDI -60- system off. Step 1 With the MDI system on and reading pressure press the SET UP key. When the event timer and data log functions are set up as outlined in Section 25, the MDI system will automatically turn itself on and make the programmed measurements over the desired time interval. At the conclusion of the programmed monitoring period the MDI system will automatically turn itself off. SET UP Step 2 Using arrow keys select the alarm function from the setup menu. When selected the word “Alarm” will flash on the display. To review logged data or perform any other data logging functions such as data labeling or uploading to a personal computer see the main data logging section (Section 22) of this manual. Section 26.0 Owner Alarm DateTimeRS232 Step 3 With the word Alarm flashing press the enter key. ENT Alarm Function – Overview (Optional Feature) This is an optional feature, if the option is not installed the MDI system will respond with: The MDI system can be equipped with a set of single pole single throw (SPMDI) relays for use in triggering annunciator lights, fans, sirens, etc. The relays have the following specifications: Option not installed If this message appears press any key to resume normal operation. Relay Specifications Parameter Specification Step 4 After pressing the enter key the display will read: Switch Arrangement: Form C Resistance (max): 50 micro ohms Switching Power (max): 30 W, 62.5 VA (resistive load) Switching Voltage (max): 110 V dc, 125 Vac Switching Current (max): 1 Amp Switching Capability (min): 10 micro amp, 10 mVdc Alarm Relay Enable Disable To set alarm levels, using the arrow keys, select the word Enable. When selected the word will flash. Alarm Relay Enable Disable The relay contact closures are accessed through the 9 Pin female D connector on the right side of the MDI system. Pin out information for set point contacts is as follows: Step 5 With the word “Enable” flashing press the enter key. ENT Step 6 After pressing the enter key the MDI system will query: High Setpoint ???????? Important Note: Set points must be entered for the specific engineering unit to be monitored. For example if a setpoint of 10 is entered the alarm relay will trip when measured and displayed pressure exceeds the numerical value of 10. The MDI system will not automatically convert the entered trip point to a new numerical value to reflect a change in engineering units. Pin 1 Relay 1 common Pin 7 Relay 1 (normally open or normally closed) Pin 8 Relay 2 common Pin 9 Relay 2 (normally opened or normally closed) Section 26.1 Step 7 Using the number keys, enter the alarm level from left to right, including any decimal point. In this example a high setpoint of 10 has been selected. Alarm Set Up High Setpoint 10.0 The alarm level trip points can be programmed from the keypad as follows. Step 8 After the desired alarm value has been keyed -61- Revision 4.3 3/2004 and is seen on the display press the enter key. Low Contact Open Close ENT Step 9 The MDI system will respond by displaying the Step 17 When the desired configuration has been following: selected and the text is flashing on the display, press the enter key. High Contact Open Close ENT Step 18 After the enter key has been pressed the MDI If Open is selected, the high limit contact will be open when the measured pressure exceeds the setpoint value. If Close is selected, the contact will close if the setpoint is exceeded. system will respond by displaying: Monitor Function Left Right Step 10 Using the arrow keys select the desired me- This will determine whether the MDI system is monitoring the left or right Quick Select pressure or temperature module. Using the arrow keys select the desired pressure module to be monitored. chanical configuration. When selected the configuration type will flash. In this example we have configured the system to close the relay contact when the alarm value is exceeded. Step 19 Use the left/right arrow keys to select the High Contact Open Close desired module to be monitored. In this example the left module has been identified for monitoring. Step 11 With the desired configuration selected and the Monitor Function Left Right text is flashing on the display, press the enter key. ENT Step 20 With the desired module selected and flashing, Step 12 After pressing the enter key the MDI system press the enter key. will respond. ENT Low Setpoint ???????? The alarm function is now armed and operating. This function is automatically disabled when the MDI system is turned off and must be re-initiated by enabling the alarms via the set up menu. Step 13 Using the number keys on the keypad, enter the desired alarm level from left to right including decimal point. In this example a low setpoint of one (1) has been selected. Section 27.0 Recertification of the Calibrator Both the base unit and the pressure modules can be recalibrated and recertified in the field. The base unit includes a firmware based, menu driven procedure that provides operator prompts to facilitate the recalibration process. The procedure encompasses both the acquisition of “as found” data and performing adjustment and recalibration of the base unit and modules. The recertification program is accessed via the set up menu key. Low Setpoint 1.0 Step 14 After the desired alarm value has been keyed and appears on the display press the enter key. ENT Step 15 The MDI system will respond by displaying the following: Section 27.1 Low Contact Open Close The calibration data is password protected with an access code. The recalibration access code is different than the owner access code. Both of the access codes are provided with the MDI at time of shipment and are located on the base unit and the calibration certificate. If the access code has been lost contact the factory and be prepared to provide the serial number of the base unit. The serial number is located on the product label on the underside of the base unit. If Open is selected, the low limit contact will be open when the measured pressure exceeds the setpoint value. If Close is selected, the contact will close if the setpoint is exceeded. Step 16 Using the arrow keys select the desired me- chanical configuration. In this example we have configured the system to close the relay contact when the Revision 4.3 3/2004 Access Codes -62- Section 27.2 Calibration/Recertification Overview dashed line across the display, press the set up key. SET UP The base unit calibration firmware provides a means of linearization and recertification of pressure modules and the base unit’s electrical input (Vdc/mA) calibration reference. In addition, the base unit employs a precision 1 VDC reference for interfacing with the modules which can be calibrated. The calibration of this reference is critical to ensure the combined output of pressure module and base unit is within rated accuracy.The following equipment is required to perform recalibration or recertification of the MDI. Section 27.3 Step 4 Using the arrow keys locate the text “Calib” in the set up menu. Calib Rtmodule Using the arrow keys select the text “Calib” from the set up menu. When the calibration function has been selected it will flash on the display. Required Equipment Step 5 With the text “Calib” displayed and flashing 1. A precision voltage supply capable of providing 1 Vdc ± 50 microvolts (±0.00005 Vdc) press the enter key. 2. Primary pressure standard with an accuracy rating of 4:1 compared to the rating of the pressure module to be tested. Step 6 The MDI will respond by displaying: ENT Access code ? .00000 3. Test leads with banana jacks and mini clips. Step 7 Enter the 5 digit calibration access code pro- 4. Recommended - Model CQS calibration quick select module. Although recalibration and recertification work can be performed with out it, this module will greatly simplify the process and reduce risk of damage to the base unit. Section 27.4 vided with the base unit. AcÐcess code ? 12345 Note: The access code is specific for the base unit being used. The code is provided on the certification sheet that accompanied the product shipment from the factory. See section 27.1 “Access Code” for information on lost passwords. As Recieved Readings of the Base Unit Electronics Please note. The following convention is used when referring to modules or module bays in this procedure. Step 8 With the correct access code displayed press the enter key. ENT The MDI will respond by displaying: Electrical Pressure The electrical calibration process allows for the calibration of the current and voltage input measurement capability of the base unit and calibration of the 0/1 vdc analog component of the interface between the base unit and the Quick Select module in use. Module Bay #1 Module Bay #2 Step 9 When this screen appears, the word “Electrical” for electrical recertification is already flashing. Therefore, press the enter key to commence the electrical calibration. Step 1 Remove any installed measurement modules. If the CQS calibration module is to be used, install it in module bay #1 at this time. ENT Step 2 Turn power on and allow for at least 15 minutes The MDI will respond by displaying: warm up time. Calibration Reference Check Step 3 With the MDI powered up and displaying a -63- Revision 4.3 3/2004 Step 10 To perform “as received” readings use the down Step 13 The value displayed under the dashed line arrow key to select Reference Check. When selected the text “Reference Check” will flash on the display. To skip as received readings and proceed immediately to calibration skip to Section 27.5. represents the as received reading for the 1 Vdc measurement. The reading will look as follows: ——— 1.0V +.99998 Ref Check Calibration Reference Check (reading must be between 0.99990 and 1.00010 for base unit to be within specification) Step 11 With text Reference Check Flashing press the After taking note of the reading press the enter key to proceed to the next as received reading. The MDI will respond by displaying the following Enter Key. ENT ——— 0.1V -.xxxxx Ref Check The MDI will respond by displaying: ——— 1.0V -.xxxxx RefCheck This is used for calibration of the 20 mA measurement capability. The measured value must be within 0.03% of the applied voltage for the current measurement to be within the 0.03% of full scale specification *****WARNING***** If the voltage standard is set to a level in excess of the recommended calibration input or is connected to incorrect pins or in contact with pins adjacent to the specified input pins during the calibration process the base unit electronics may be damaged. Use extreme caution when connecting test leads and applying test voltage inputs. Step 14 To check the measured voltage using a pre- cision voltage source: Apply 0.10000V to J3 pin 7 To apply the 0.1 Vdc signal use the same procedure as outlined in steps 11 and 12 of this section. The Model CQS Calibration Quick Select module is available to simplify connection of the voltage standard to the base unit. The module provides banana jack connections for the input of the voltage standard to the MDI base unit. Step 15 The value displayed under the dashed line represents the as received reading for the 1 Vdc measurement. The reading will look something like follows: ——— Step 12 To check the measured voltage using a pre- cision voltage source apply 1.00000 volt ±50 microvolts. Do not use a voltage less than or greater than 1 volt ±50 microvolts. When the MDI is ready to measure the reference voltage it will display: 0.1V Take note of the measured value. Step 16 To repeat taking the as received readings press the enter key to return to the 1.0 Vdc as received reading screen. To exit the as received readings mode press the CE key. Apply 1.00000V to J3 pin 7 CE These pins are located in the connector in module bay #1 as shown below. As received readings for the mA and Voltage measurements performed through the miniature banana jacks on the instrument keypad can be done by simply setting the base unit up to measure the electrical parameter (current or voltage) to be tested and inputting a series of known values to the correct jacks. Refer to Section 7.0 to determine the set up procedure for the measurement of current and/or voltage inputs. Pin 7 Pin 6 RS 232 As received readings are now completed. Section 27.5 To apply the 1 Vdc signal to the MDI connect the precision voltage generator so that the positive line is connected to pin 7 and the ground is connected to Pin 6. Revision 4.3 3/2004 Adjustment/Calibration Base Unit Electronics Step 1 With the MDI on and displaying pressure mea- surement data press the set up key. -64- SET UP Step 10 Select the text “Calibration”, when selected the word calibrate will flash on the display Cal½i¼brate Ref¼erÐence Check Step 2 Using the arrow keys locate the text “Calib” in the set up menu. Calib RTmodule Step 11 With the text “Calibrate” flashing press the enter key. Using the appropriate arrow keys select the text “Calib” from the set up menu. ENT Step 3 When the calibration function has been selected Step 12 Using a precision voltage source apply 1.00000 it will flash on the display. volt (+50 microvolts applied voltage should, at a minimum, equal 1.0 volt. Do not accept a voltage less than 1.0 volt minus 50 microvolts or greater than 1.0 volt plus 50 microvolts) to pin 7 of the sensor connection plug located in the right (looking into the MDI with the unit in the upright position and the module bays nearest the operator) module bay of the base unit. Connect the ground for the voltage source to pin 6. Calib RTmodule Step 4 With the text “Calib” displayed and flashing press the enter key. ENT Step 5 The MDI will respond by displaying: Access code ? .000000 Looking into the right module bay (when looking at the MDI from behind) pin 7 is the 2nd pin from the top in the right column. In the left column, pin 6 is the center pin, third from the top or bottom of the column. Step 6 Enter the 5 digit calibration access code pro- vided with the MDI base unit. These pins are located in the connector in module bay #1 as shown below. Access code ? 12345 Step 7 With the correct access code displayed press the enter key. ENT Pin 7 Pin 6 The MDI will respond by displaying: RS 232 Electrical Pressure The electrical calibration process allows for the calibration of the current and voltage input measurement capability of the base unit as well as the calibration of the 0/1 Vdc analog component of the interface between the base unit and the Quick Select module in use. *****WARNING***** Voltage levels in excess of the recommended calibration input, incorrect pin connection or contact with pins adjacent to the specified input pins during the base unit calibration process may damage the unit. Use extreme caution when applying voltage signals to the base unit. Step 8 Use the arrow keys to select the word “elec- trical”. When selected the word will flash on the instrument display. Electrical PresÐsure An accessory calibration module is available to simplify connection of the voltage standard to the base unit. This module is model CQS Calibration Quick Select module. This module provides banana jack connections for the input of the voltage standard to the MDI base unit. Step 9 When this screen appears, the word “Electrical” for electrical recertification is already flashing. Therefore, press the enter key to commence the electrical calibration. ENT Step 13 The MDI will display the following: ApÐply 1.00000V to J3 pin 7 The MDI will respond by displaying: Cal½i¼braÐtion Ref¼erÐence Check -65- With 1.00000 volt (±50 microvolts) applied press the enter key. Revision 4.3 3/2004 ENT xxxxx workÐing The MDI will respond by displaying: After completion of the adjustments for the 30.0000 volt input the MDI will display: xxxxx working Apply 20.0000 mA to mA jack The word “working” flashes as the MDI makes the necessary internal adjustment to calibrate the voltage measurement electronics to 1.0000 volts. The reading must be within ±0.005%FS (.99995 to 1.00005 Vdc) for base unit to be within specification. The reference check mode can be used to verify calibration accuracy. Step 18 Using a precision current generator apply a 20.0000 mA (±5 microamps) input to the mA jacks. Use the COM and mA jacks on the MDI keypad. Step 19 When the proper current is being applied press After completion of the adjustments for the 1.00000 volt input the MDI will display: the enter key. ENT ApÐply 0.100000V to J3 pin 7 The MDI will respond by displaying: xxxxx workÐing With 0.100000 volt (±50 microvolts) applied press the enter key. After completion of the 20 mA recertification the MDI will display: ENT The MDI will respond by displaying: Cal½i¼braÐtion done Save Can¼cel xxxxx workÐing Step 20 Using the left/right arrow keys select “Save” to After the MDI completes auto-adjusting the measured value it will display: write the new data to the EEPROM calibration storage. To discard the electrical readings select Cancel. Apply 10.0000V to volts jack ***WARNING*** 10.0000 volt (±500 microvolts) input to the miniature recessed banana jacks. Use the COM and V jacks on the calibrator keypad. Selecting and entering the word “Save” will overwrite the calibration data previously stored in EEPROM memory. Previously stored calibration data will be permanently destroyed. Step 15 When the proper voltage is being applied press Step 21 With the desired selection flashing (Save or Step 14 Using a precision voltage generator apply a Cancel) press the enter key. the enter key. ENT ENT Step 22 If “cancel is selected the MDI will exit the The MDI will respond by displaying: calibration mode. If “save” is selected the calibrator will prompt you to enter the date of the new calibration as follows: xxxxx workÐing After completion of the adjustments for the 10.0000 volt input the MDI will display: mmddyy - - - - - - Apply 30.0000V to volts jack Step 23 Using the number keys enter the current date such as: Step 16 Using a precision voltage generator apply a mmddyy 031196 30.0000 volt (±3 millivolts) input to the voltage jacks. Use the COM and V jacks on the MDI. Step 17 When the proper voltage is being ap- For March (03), eleventh (11), 1996 plied press the enter key. Step 24 With the desired date entered and displayed, ENT press the enter key. The MDI will respond by displaying: Revision 4.3 3/2004 ENT -66- SET UP Step 25 Turn off the MDI and install the desired Quick Select pressure module per instructions provided in Section 3.2. Step 5 Using the arrow keys locate the text “Calib” in the set up menu. Step 26 Turn on theMDI to resume general pressure Calib Rtmodule measurement activities. Note: During electrical recertification any of the calibration ranges may be skipped by pressing the clear entry (CE) key. When the clear entry key is pressed during the electrical calibration process the MDI will advance to the next electrical input in the calibration sequence. Section 27.6 Select the text “Calib”. When selected the text will flash on the display. Step 6 With the text “Calib” displayed and flashing press the enter key. ENT Recertification of Quick Select Pressure Modules Step 7 The MDI will respond by displaying: AcÐcess code ? .000000 The MDI is available in a selection of accuracies from ±0.1% of span through ±0.025% of span, covering ranges from 0.25 inches of water to 10,000 psi. Whereas, the MDI can be calibrated in the field, appro-priate pressure standards must be used to assure the accu-racy of the MDI system is not degraded by the calibration process. As recommended by standards organizations such as A.S.M.E., N.I.S.T and various U.S. and world government agencies calibration standards should be at least 4 times more accurate than the device to be calibrated. Step 8 Enter the 5 digit calibration access code pro- vided with the MDI base unit. AcÐcess code ? 12345 Step 9 With the correct access code displayed press the enter key. ENT Therefore, if you will be calibrating a ±0.1% of span Quick Select pressure module, a standard of equivalent range would have to have an accuracy of at least ±0.025% of span. If the standard to be used is of a higher range than the Quick Select pressure module to be calibrated, even greater accuracy is required. For example, if a ±0.1% of span Quick Select pressure module with a range of 50 psi is to be calibrated with a 100 psi standard, the calibrating standard should have a minimum accuracy of ±0.0125% of span. The MDI will respond by displaying: Elec¼triÐcal PresÐsure Step 10 Using the down arrow key select the word “Pressure”. When selected, the word Pressure will flash on the display: Elec¼triÐcal PresÐsure To recertify a Quick Select pressure module follow the procedure outlined below. Step 11 With the word “Pressure” flashing Step 1 With the power to the MDI off install the Quick press the enter key. Select pressure module to be calibrated in the left module bay (looking down on the unit with the keypad up and the display at the top). ENT The MDI will respond by displaying: Zero Cal Yes No Step 2 Power up the MDI system by pressing the on/off key. ON OFF Step 12 To perform zero calibration (adjustment) select Yes and press the enter key. ENT Step 3 Set the left side of the display for the engi- neering units to be used for the calibration process. Information on engineering unit selection is provided in Section 8, Engineering Unit Selection. To skip zero adjustment and proceed to full scale calibration (adjustment) select No and press the enter key. Step 13 With the pressure module at zero pressure, Step 4 With the MDI on and displaying pressure mea- press the enter key. surement data press the set up key. -67- Revision 4.3 3/2004 ENT Quick Select module when calibration activities commenced. Note: The following should be done to zero each type of pressure module: Enter presÐsure apÐplied 100.01 PresÐsure Type Zero Source In the above example a pressure of 100.01 is being applied to the left Quick Select pressure module. Absolute – Apply absolute zero using vacuum pump. Gauge – Vent to atmosphere Compound – Vent to atmosphere Differential – Vent both ports to atmosphere Vacuum – Vent to atmosphere Step 17 With the full scale (F.S.) pressure ap- plied and the corresponding value shown on the display, press the enter key. ENT The calibrator will respond by displaying: xxxxx workÐing The MDI will respond by displaying: Linearity Cal Yes No Where xxxxxx is the voltage being read from the Quick Select pressure module and the flashing word “working” indicates that the calibrator is making the internal adjustments necessary for the recalibration. Step 18 If calibration activity is to be limited to zero and span, using the arrow keys select the word No (when selected the word “No” will flash on the display). If linearity adjustment is to be performed proceed to Step 21. After approximately 3 seconds the MDI will display: Full Scale Cal Yes No Linearity Cal Yes No Step 14 To perform full scale calibration (adjustment) select Yes and press the enter key. Step 19 With the word No flashing press the ENT enter key. To skip full scale adjustment and proceed to re-linearization process select No and press the enter key. ENT The MDI will respond by displaying: Important Note: If full recalibration of the pressure module is desired the zero and span adjustment must be reset through these procedures prior to entering the linearization mode. The zero and span values established in these procedures will be used for the zero and span values of the new calibration data. If zero and span are not reset at this time the recalibration will use the values for zero and span stored in memory from the previous zero and span activities. Calibration done Save Can¼cel Step 20 To save the new zero and span values to mem- ory, thereby overwriting the previously stored values in the EEPROM, select the word “Save” and press the enter key. To discard information and retain the information currently in the EEPROM of the calibrator select “Cancel” and press the enter key . If the save option is selected proceed to Step 21. To re-linearize module proceed to Step 26. Apply the full scale pressure for the Quick Select pressure module being calibrated. Step 15 (Coming as close as possible to the full scale measurement range of the pressure module being calibrated) with the pressure applied press the enter key. Step 21 If “cancel” is selected the MDI will exit the cali-bration mode. If “save” is selected the calibrator will prompt you to enter the date of the new calibration as follows: ENT mmddyy - - - - - - The MDI will respond by displaying: Enter presÐsure applied .00000 Step 22 Using the number keys enter the current date such as: Step 16 Using the keypad enter the exact value of the mmddyy 031196 pressure applied to the Quick Select pressure module. Be certain to use the engineering unit in use for the left Revision 4.3 3/2004 -68- For March (03), eleventh (11), 1996 Step 23 With the desired date entered and displayed, Step 30 Apply the pressure required for point one and press the enter key. enter the numerical value, using the number keys of the exact pressure level applied. (Use the engineering unit in use for the left pressure module at the time the calibration process was started). When point 1 has been applied and entered the display will look as follows for calibration point of 10.002. ENT Step 24 Turn off the MDI and install the de- sired Quick Select module. Step 25 Turn on the MDI to resume general pressure measurement activities. Apply and en¼ter value 10.002 Step 26 To re-linearize a Quick Select pressure module select the word “Yes” to the linearity query. Step 31 With the applied pressure displayed Important Note: If full recalibration of the pressure module is desired the zero and span adjustment must be reset through these procedures prior to entering the linearization mode. The zero and span values established in these procedures will be used for the zero and span values of the new calibration data. If zero and span are not reset at this time the recalibration will use the values for zero and span stored in memory from the previous zero and span activities. press the enter key. ENT The MDI will respond by displaying: +xxxxx working After 3-5 seconds the MDI will request the next calibration point by displaying. Apply and en¼ter value 2.00000 Linearity Cal Yes No Step 32 Apply the pressure required for the next cali- Step 27 With the word “Yes” flashing press the bration point and enter the applied pressure value with the number keys. For the second point a pressure of 20.003 has been applied. enter key. ENT Apply and en¼ter value 20.003 The MDI will respond by displaying: Clr Old Lin Data Cancel Pro¼ceed Step 33 With the required pressure level ap- plied and shown on the display press the enter key. Step 28 Use the arrow keys to select “Proceed” to con- ENT tinue the linearization process. Select “Cancel” using the arrow keys to discontinue the re-linearization process. Step 34 Repeat steps 23-26 as many times as ***WARNING*** required to produce the desired number of linearization points. Points must be in sequence (low to high). Entering “Proceed” will erase linearization data in the EEPROM of the calibrator. A maximum of 18 linearization points plus the zero and span points may be programmed for Quick Select pressure modules. Factory calibration consists of a 10 point linearization combined with a 10 point upscale and 10 point down scale linearization and hysteresis check. Clr Old Lin Data Cancel Pro¼ceed Step 29 To continue the linearization process, with the word “Proceed” flashing press the enter key. Important Note: The number of calibration points needed to assure adequate correction for non-linearity is as follows: ENT The MDI will respond by displaying: Sensor Accuracy 0.025% & 0.05% including temperature Apply and en¼ter value 1.00000 -69- Number of Points 20 (5% increments) Revision 4.3 3/2004 0.025-0.07% (10% increments and zero) 0.1% (20% increments and zero) 0.25% (25% increments and zero) 11 6 5 Step 35 When the final linearization point to be performed has been completed press the clear entry key. CE The MDI will respond by displaying: Calibration done Save Can¼cel Step 36 To save the new linearization data to memory, thereby overwriting the previously stored values in the EEPROM, select “Save” and press enter. To discard the newly generated calibration information select “Cancel” and press enter. Step 37 If “cancel” is selected the calibrator will exit the calibration mode. If the enter key is pressed with the word “save” flashing the calibrator will prompt entry of the date of the new calibration as follows: mmddyy - - - - - Step 38 Using the number keys enter the current date such as: mmddyy 031196 For March (03), eleventh (11), 1996 Step 39 With the desired date entered and displayed, press the enter key. ENT Step 40 Turn off the MDI and install the de- sired Quick Select module. Step 41 Turn on the MDI to resume general pressure measurement activities. Revision 4.3 3/2004 -70- TO CONVERT FROM TO bar atm Pa 1013.25 0.01 14.5038 14.6959 1.45038 10-4 0.145038 0.014198 bar atm Pa kPa cmH2O @ 20°C -71- 0.0193368 1.33322 0.0013322 0.00131579 133.322 0.491154 .0142233 14.2233 .037108 0.4453 1.46096 mmHg @ 0°C in.Hg @ 0°C gm/cm1 kg/cm2 in. sea water ft sea water m sea water 100.731 30.702 2.55851 980.665 .980665 .100730 .099409 0.030702 0.030301 10073.0 3070.2 255.851 2.52505 10-3 2.55851 10-3 98.0665 98060.5 9.67842 10-4 0.980665 0.967842 9.80665 10-4 33.8639 0.0338639 0.0334211 3386.39 29.8368 0.0298368 0.0294470 2983.68 0.432756 ftH2O @ 20°C 248.64 97.891 1000 1 101325 100000 100 0.036063 2.45392 10-3 9.66105 10-4 9.7891 10-4 0.0024864 0.0098692 9.86923 10-6 1 0.986923 9.86923 10-4 0.010 0.00001 1.01325 1 0.001 in.H2O @ 20°C 2.4864 0.97891 10.0 1000 1 0.0145038 68.9476 0.0689476 0.0680460 6894.76 mbar mbar psi 1 psi 10.0730 3.0702 .255851 98.0665 .0980665 3.38639 0.133322 2.98368 0.24864 0.097891 1 0.001 101.325 100 0.100 6.8947 kPa 407.511 402.18 0.40218 27.730 in.H2O @ 20°C 102.90 31.3638 2.6136 1001.8 1.0018 34.593 1.3619 30.480 2.5400 1 10.215 40.512 12.3482 1.02900 394.41 .3941 13.619 0.53620 12 1 0.3937 4.02118 0.010215 0.0040218 1035.08 1021.5 1.0215 70.433 cmH2O @ 20°C 760.0 10-3 35.959 10-4 3.3760 1.02900 .08575 32.868 .032868 1.13491 0.04468 1 0.083333 0.035281 0.3352 75.553 23.029 1.91908 735.559 .735559 25.400 1 22.380 1.8650 0.73424 7.5006 7.5006 750.06 3.352 gm/cm1 kg/cm2 in. sea water 2.03602 70.030696 0.07030686 26.9484 in.Hg @ 0°C 1.033227 10-5 .0109716 1.019716 1033.227 1019.716 1.019716 2.9745 0.90664 .07555 28.959 .028959 1 0.03937 0.881089 0.073424 0.028907 .382613 1.35951 0.030425 .521096 11.6621 0.0025354 .971840 9.9821 10-4 3.9085 3.9085 396.031 10-4 390.85 102.716 31.308 2.60896 1000 1 .102716 0.031308 2.60895 10-3 1 .001 39.37007 12 1 383.292 .383292 34.5316 0.0345316 13.23581 1.35951 30.425 2.5354 .99821 0.295300 10.19716 0.0101972 2.95300 29.9213 10-4 29.5300 0.75006 0.0295300 .00101972 0.00101972 .39085 51.7149 mmHg @ 0°C 33.52 0.03352 2.3108 ftH2O @ 20°C .684482 m sea water .099276 9.9276 10.0591 9.9276 .29621 .33619 3.2606 1 .08333 31.9410 1 .3048 .0254 9.7355 .0319410 .0097355 1.1030 0.043424 .013236 0.97183 0.080986 .024684 0.031884 .0097182 0.32571 3.2571 33.002 32.571 .032571 .0099276 2.2457 ft sea water APPENDIX A. – PRESSURE CONVERSION FACTORS CONVERSION FACTORS FOR UNITS OF PRESSURE Revision 4.3 3/2004 APPENDIX B – ASCII CHARACTER CODE This chart shows the ASCII character set and corresponding code numbers in decimal, hexadecimal and binary form. Decimal 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 Revision 4.3 Binary 00000000 00000001 00000010 00000011 00000100 00000101 00000110 00000111 00001000 00001001 00001010 00001011 00001100 00001101 00001110 00001111 00010000 00010001 00010010 00010011 00010100 00010101 00010110 00010111 00011000 00011001 00011010 00011011 00011100 00011101 00011110 00011111 00100000 00100001 00100010 00100011 00100100 00100101 00100110 00100111 00101000 00101001 00101010 00101011 00101100 00101101 00101110 00101111 00110000 00110001 00110010 00110011 00110100 00110101 00110110 00110111 3/2004 Hexadecimal 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F 20 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30 31 32 33 34 35 36 37 ASCII Character (NUL) (SOH) (SRX) (ETX) (EOT) (ENQ) (ACK) (BEL) (BS) CI) (LF) (VT) (FF) (CR) (SO) (SI) (DLE) (DCI) (DC2) (DC3) (DC4) (NAK) (SYN) (SRX) (CAN) (EM) (SUB) (ESC) FS) (GS) (RS) (115) (SP) ! ’’ # $ % Et ‘ ( ) * + ’ . / 0 1 2 3 4 5 6 7 Decimal 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 -72- Binary 00111000 00111001 00111010 00111011 00111100 00111101 00111110 00111111 01000000 01000001 01000010 01000011 01000100 01000101 01000110 01000111 01001000 01001001 01001010 01001011 01001100 01001101 01001110 01001111 01010000 01010001 01010010 01010011 01010100 01010101 01010110 01010111 01011000 01011001 01011010 01011011 01011100 01011101 01011110 01011111 01100000 01100001 01100010 01100011 01100100 01100101 01100110 01100111 01101000 01101001 01101010 01101011 01101100 01101101 01101110 01101111 Hexadecimal 38 39 3A 3B 3C 3D 3E 3F 40 41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4E 4F 50 51 52 53 54 55 56 57 58 59 5A 5B 5C 5D 5E 5F 60 61 62 63 64 65 66 67 68 69 6A 6B 6C 6D 6E 6F ASCII Character 8 9 : ; < = > ? @ A B C D E F G H I J K L M N O P Q R S T U V W X Y Z [ / ] ^ ‘ a b c d e f g h 1 j k l m n o Decimal 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 Binary 01110000 01110001 01110010 01110011 01110100 01110101 01110110 01110111 01111000 01111001 01111010 01111011 01111100 01111101 01111110 01111111 10000000 10000001 10000010 10000011 10000100 10000101 10000110 10000111 10001000 10001001 10001010 10001011 10001100 10001101 10001110 10001111 10010000 10010001 10010010 10010011 10010100 10010101 10010110 10010111 10011000 10011001 10011010 10011011 10011100 10011101 10011110 10011111 10100000 10100001 10100010 10100011 10100100 10100101 10100110 10100111 Hexadecimal 70 71 72 73 74 75 76 77 78 79 7A 7B 7C 7D 7E 7F 80 81 82 83 84 85 86 87 88 89 8A 8B 8C 8D 8E 8F 90 91 92 93 94 95 96 97 98 99 9A 9B 9C 9D 9E 9F AO A1 A2 A3 A4 A5 A6 A7 ASCII Character p q r s t u v w x y z { | } ~ (DEL) Decimal 168 169 170 171 172 173 174 175 -73- Binary 10101000 10101901 10101010 10101011 10101100 10101101 10101110 10101111 Hexadecimal A8 A9 AA AB AC AD AE AF ASCII Character Revision 4.3 3/2004 Decimal Binary Hexadecimal 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 10110000 10110001 10110010 10110011 10110100 10110101 10110110 10110111 10111000 10111001 10111010 10111011 10111100 10111101 10111110 10111111 11000000 11000001 11000010 11000011 11000100 11000101 11000110 11000111 11001000 11001001 11001010 11001011 11001100 11001101 11001110 11001111 11010000 11010001 11010010 11000011 11010100 11010101 11010110 11010111 11011000 11011001 11011010 11011011 11011100 11011101 11011110 B0 B1 B2 B3 B4 B5 B6 B7 B8 B9 BA BB BC BD BE BF C0 C1 C2 C3 C4 C5 C6 C7 C8 C9 CA CB CC CD CE CF D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 DA DB DC DD DE Revision 4.3 3/2004 ASCII Character -74- Decimal Binary Hexadecimal 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 11011111 11100000 11100001 11100010 11100011 11100100 11100101 11100110 11100111 11101000 11101001 11101010 11101011 11101100 11101101 11101110 11101111 11110000 11110001 11110010 11110011 11110100 11110101 11110110 11110111 11111000 11111001 11111010 11111011 11111100 11111101 11111110 11111111 DF E0 E1 E2 E3 E4 E5 E6 E7 E8 E9 EA EB EC ED EE EF F0 F1 F2 F3 F4 F5 F6 F7 F8 F9 FA FB FC FD FE FF ASCII Character APPENDIX C Product Specifications PHYSICAL SPECIFICATIONS Dimensions 10.9 in. (L) x 6.74 in. (W) x 4.0 in. (H) Panel Cutout 6.56 in. x 3.53 in. Weight Max. 4.08 lbs. w/2 pressure modules installed Case Material High impact ABS Sensor Module Capacity 2 bays for Heise HQS “Quick Select®” sensor modules Display 2 line LCD, 0.037 in. height per line. Can display simultaneous readings from 2 modules. Electrical Connection Standard banana jacks BASE UNIT OPERATING SPECIFICATIONS Operating Temperature Range 32° to 120°F Storage Temperature –4° to 158°F Update Rate 130 ms (nominal) with one sensor installed Resolution ±0.002% of span, 60,000 counts (max) Warm-Up 5 minutes for rated accuracy Electrical Measurements 0-50 mA or 0-30 Vdc Options Datalogging with Hi-Lo Relay Feature – Datalogging manually or automatically stores up to 643 measured values for upload to PC. Includes upload utility software. Hi-Lo relay feature allows programming of setpoints for activation of alarms or control valves. (Hi-Lo not available with FM approval.) Backlit Display Built-in NiCad Rechargeable Battery Pack Built-in 24Vdc Loop Power Supply Handle Panel Mounting Brackets Power Requirements Standard: ac adapter provided for 110Vac/60 Hz Available: ac adapter provided for 220Vac/50 Hz ac adapter provided for 100Vac/60 Hz Optional: Built-in rechargeable NiCad Battery Pack* *(Life: 20 hours nominal without backlit LCD, 2 hours nominal with backlit LCD. Activating RS232 results in approximately 30% reduction in battery life.) Certification N.I.S.T. Traceable certification document provided for base display unit and sensor modules PRESSURE SENSOR MODULE SPECIFICATIONS HQS-1 Pressure Types Gauge, differential & compound Available Ranges (See Chart) Available Accuracies ±0.06 (0/2-0/200 in. H2O), ±0.07 (0/0.25-0/1 in. H2O) or 0.1% of Span Compensated Temperature Range 20°F to 120°F Temperature Effect ±.004% of Span per °F over compensated range (from reference temperature range of 70° ±3°) Repeatability ±0.01% of span (range 0/1 in. H2O or higher) ±0.02% of span (ranges below 0/1 in. H2O) Sensitivity ±0.002% of span (typical) Media Compatibility Clean, dry, non-conductive, non-corrosive gas Under/Overpressure Capability –15 to 50 psi Maximum Static (line) Pressure 100 psi Process Connection Standard: 1/8 NPT female Optional: G 1/8 British standard HQS-2 Pressure Types Gauge, absolute, compound and vacuum Available Ranges (See Chart) Available Accuracies ±0.025, 0.05 or 0.1 % of Span (±0.025 & 0.05% not available on 0/10,000 psi range) Compensated Temperature Range 20°F to 120°F Temperature Effect Standard: ±.004% of Span per °F over the compensated range (from reference temperature range of 70° ±3°) Optional: No additional error due to temperature over the compensated range Repeatability ±0.01% of span Sensitivity ±0.002% of span (typical) Media Compatibility 0/5 psi range only: Clean, dry, non-conductive, non-corrosive gas 0/10-0/10,000 psi ranges: Any medium compatible with 316 SS isolation. Optional: Cleaned for Oxygen Service (0/10-0/10,000 psi ranges only) Overpressure Capability 200% for ranges up to 1000 psi 150% for ranges over 1000 psi Process Connection Standard: 1/8 NPT female Optional: 1/8 NPT female with flush port (ranges 10 psi and over) G 1/8 British standard G 1/8 British standard with flush port (ranges 10 psi and over) Welded VCR fitting with standard finish -75- TEMPERATURE INTERFACE MODULES HQS-RT1 and HQS-RT2 interface modules allow the ST-2H to measure temperature with an RTD: HQS-RT1: Accommodates Pt100, Ni120, Cu120 and other common 2, 3 or 4 wire probes with resistance outputs of 400 ohms or less. HQS-RT2: Accommodates Pt1000 and other common 2, 3 or 4 wire probes with resistance outputs of 4000 ohms or less. Selectable Units of Measure °C, °F, °K, °R and ohms Input Receptacle Accepts TA4F type RTD connector RTD Probes Available Pt-100 probes, 6˝ or 12˝ length, with or without handle. DIN Class A accuracy. Includes mating TA4F connector. Consult factory for details and availability. The HQS-TC1 interface module allows the ST-2H to measure temperature with a thermocouple: HQS-TC1 Compatibility Programmed to provide direct temperature readout from types J, K, T, E, R, S, B & N thermocouples or direct millivolt readout from any thermocouple. Reference Junction Automatic internal or manual external Resolution Automatic or manually selectable, up to .01° Units of Measure Selectable; °C, °F, °K, °R and millivolts Receptacle Accepts “miniature thermocouple connector”, Omega® type SMP ACCESSORIES 110Vac/60 Hz ac Adapter 220Vac/50 Hz ac Adapter Field Link 2 Software package – to create certification documents from datalogged data Revision 4.3 3/2004 STANDARD RANGES HQS-2 HQS-1 psi ˝H2O Other Engineering Units** (gauge and (gauge/ absolute differential pressure) pressure) *5 10 15 30 50 60 100 150 200 250 300 500 600 1000 1500 2000 2500 3000 5000 6000 7500 10,000 0.25* 0.5* 1.0* 2.0* 3.0* 5.0* 10* 15* 25* 50* 100* 150* 200* psi in. H2O in. Hg ftSW Bar mBar kPa mPa mmHg cmH2O mmH2O kg/cm2 User Selectable **Note: Engineering units identified above are accessible through the unit select feature. However, readout will default to the primary unit of measure on start-up. Sensor modules scaled in primary units other than in. H2O (HQS-1) or psi (HQS-2) are also available. Consult factory. vacuum *5 10 15 compound ±5 ±10 ±15 –15/+30 –15/+60 ±0.125* ±0.25* ±0.5* ±1.0* ±1.5* ±2.5* ±5.0* ±7.5* ±12.5* ±25* ±50* ±75* ±100* * Non-isolated, for clean dry gas only ELECTRICAL SPECIFICATIONS Electrical Sourcing Specification: 24 Vdc at 25mA. Electrical Measurement Specification: Input volts Accuracy 0/10 Vdc ±0.025% F.S. 0/30 Vdc ±0.10% F.S. Input (mA) Accuracy 0/20mA ±0.03% F.S. 0/50mA ±0.05% F.S. Auto-ranging 10/30 Vdc and 20/50mA Temperature Effects Electrical Measurement: ±0.001% of span per °F over the compensated range. INTERFACE AND DATA LOGGING RS232 Serial Interface: with 9-pin D type at 300, 1200, 2400, 9600 baud. Field Calibration: Calibration module and proper pressure and electrical standards are required. Optional Data Logging Capacity: Standard measurements: 714 records Date/time stamped measurements: 384 records. Optional Certification Generation Firmware: Stores 10 complete sets of the calibration data including 10 “as found” and 10 “as left” data sets. ACCESSORIES AC Adaptors: Provide 9 Vdc output. Part Number Adapts From 831X016-01 110 Vac, 60Hz 831X016-02 100 Vac, 50Hz 831X016-03 230 Vac, 50Hz Calibration Quick-Select Module: For calibration of base unit electronics. Part Number: CQS. System Protection Module: Protects base unit when only one measurement is required. Part Number: HQS-XS. Cable Assembly: Connects base unit to 9-pin female serial port on computer. Part Number: 838X011-01. Adapter 9-Pin to 25-Pin: Serial port connector on computer. Part Number: 838X012-01. Hoses: Provide 1/2-20 UNF internal fittings. For use with pumps and general process connections. Part Number: 840X007-01 – 3 ft hose. Part Number: 840X007-02 – 5 ft hose. 1 /8 NPT external fitting adaptor to convert hose connector from 1/2-20 to NPT. Part Number: 840X006-01. ST-2H DIMENSION DRAWINGS 0.56 9.24 1.10 6.33 6.74 3.31 1.25 4.00 0.93 1.44 3.47 0.97 Revision 4.3 3/2004 -76- 1.51 TABLE I System Accuracy (reading in temperature units): Includes the MDI base unit and GQS-TC1 interface module. (Does not include inaccuracy of the thermocouple device. Consult thermocouple manufacturer or ISA MC96.1 for thermocouple accuracy specifications. Typical inaccuracies range from ±1 to ±2.2°C.) Accuracy @ 25°C Ambient (Including Internal Reference Junction) Expressed as ±°C Max. additional error due to ambient temperature deviation from 25°C. Expressed as additional C error per each C deviation from 25°C Thermocouple Type Measurement Range (°C) Accuracy @ 25°C Ambient (Not Including Internal Reference Junction) Expressed as ±°C J –210 to –151 –150 to 1200 0.7 0.3 1.1 0.4 0.02 0.01 K –240 to –201 –200 to –101 –100 to 999 1.5 1.0 0.5 2.2 1.5 0.8 0.05 0.03 0.02 T –250 to –201 –200 to –101 –100 to 400 1.5 0.8 0.5 2.2 1.2 0.8 0.05 0.03 0.02 E –250 to –201 –200 to –101 –100 to 400 1.2 0.6 0.3 2.0 1.1 0.6 0.04 0.02 0.01 R&S –50 to 299 300 to 1768 3.4 1.2 3.6 1.3 0.10 0.04 B 100 to 199 200 to 499 500 to 999 1000 to 1820 14.00 14.0 5.0 3.0 1.2 14.0 14.00 5.0 3.0 1.2 0.44 0.16 0.08 0.04 N –250 to –226 –225 to –101 –100 to 1300 4.3 2.1 1.0 5.7 2.8 1.4 0.14 0.07 0.02 Conversion Factors (to convert °C specifications to other units of measure): To convert from °C to °F: °F = (1.8 x °C) + 32 To convert from °C to °K: °K = °C + 273.15 To convert from °C to °R: °R = (1.8 x °C) + 427.67 TABLE II System Accuracy (based on direct millivolt reading from thermocouple – includes MDI base unit and GQS-TC1 interface module. ((Does not include inaccuracy due to the thermocouple device. Reference junction not applicable to direct millivolt readings.) Input Range of Accuracy @ 25°C Max. additional error due to ambient temperature deviation from 25°C. Expressed as additional millivolt error per each °C deviation from 25°C –10 to 100 millivolt ± 0.0125 millivolts .001 -77- Revision 4.3 3/2004 APPENDIX D Remote Communications Mode MDI Digital Indicator - Remote Mode RS232 Operation Many of the features of the MDI indicator can be accessed and controlled by a remote terminal, PC or PLC. This is accomplished by selecting the remote function in the setup menu which is accessed via the front panel of the indicator. Press the “setup” key then use the arrow key(s) to scroll through the choices to the RS232 function. With RS232 flashing press the “ent” key to select. Next select “enable”, choose an appropriate baud rate (based on the terminal or pc’s serial port configuration) and use the arrow keys to select “remote”. The last choice is to select an end of message character which can be CrLf (carriage return/line feed) or “prog” which allows for the entry of an ASCII code for an end of message character (e.g. 13 for carriage return, etc.). For more information regarding the operation of the serial port see section 18.0 on page 39 of the operating manual. Basic Hardware and Software Setup Step 1. Connect cable to MDI Indicator serial port and PC com port. The cable connection should be null modem (i.e transmit and recieve are flipped between the two devices). Step 2. Power up MDI Indicator by pressing the on/off button. Step 3. Configure the serial port on the MDI indicator as follows: A. Press “Setup” B. Cursor to “RS232” <ENT> C. Cursor to “Enable” <ENT> D. Cursor to “9600” <ENT> E. Cursor to “Remote” <ENT> The MDI indicator’s serial port is now configured for 9600 baud communication. Step 4. Configure the com port in a PC Terminal application. A. Click on the Settings menu option and pull down to select Communications B. Click on 9600 Baud, 8 Data Bits, 1 Stop Bit, Parity None, Flow Control None, select the appropriate Com Port, and click OK. The Terminal application is now configured to communicate with the MDI Indicator in the Remote Mode. Step 5. Verify Communication between MDI Indicator and PC 1. Type a question mark character and press enter on the terminal keyboard. The Indicator should respond with a display of pressure readings from both sensors similar to the following: ? 0.004469,-0.000227 2. If there is no response, verify the cable connections, cable type (modem vs.. thru), the Com Port settings then repeat steps 1 through 5 above. Revision 4.3 3/2004 -78- Step 6. Communication link is established After communications have been sucessfully established you are ready to use the commands listed in the following command library to “talk to” and modify the behavior of the MDI indicator. Command Syntax The MDI indicator expects a CR (carriage return) character as the terminator on the command string. In the following examples the underscore character ( _ ) represents a single space. Commas must be included where indicated. The command can be transmitted in upper case or lower case. Command Library Summary Following is a list of commands and a description of their function. Commands can be sent from a terminal or PC using a terminal package or imbedded in custom software which includes a command. A command followed by a question mark character will return the status of the feature (on/off or value where applicable). The status of the feature can be changed by sending the command and an appropriate value as summarized in the following table. Note: Commands must be terminated with a carriage return. Note: The underscore character ( _ ) in the following table represents a single space. Command ? Function Returns the current displayed value(s) BATCK? Returns the battery charge status DAMP? Returns the status of the damping function DAMP_0 DAMP_1 DAMP_2 DAMP_3 Turns damping off Sets damping to level 1 Sets damping to level 2 Sets damping to level 3 EUNIT? Returns a code representing the current engineering unit(s) EUNIT_1 Sets left display to PSI EUNIT_2 Sets left display to inHG EUNIT_3 Sets left display to inH2O EUNIT_4 Sets left display to FtSeawater EUNIT_5 Sets left display to Bar EUNIT_6 Sets left display to mBar EUNIT_7 Sets left display to Kpa EUNIT_8 Sets left display to MPA EUNIT_9 Sets left display to mmHg EUNIT_10 Sets left display to cm Water EUNIT_11 Sets left display to mm Water EUNIT_12 Sets left display to kg/cm2 EUNIT_13 Sets left display to User Defined Engineering Unit (see engineering unit feature in manual) Note: Each displayed value can be set to a unique engineering unit by including both in the command line as in the following example: EUNIT_2,_11. This will set the left display to inches HG and the right display to mm Water. Command EUNIT_15 EUNIT_16 EUNIT_17 EUNIT_18 EUNIT_19 Response Degrees C Degrees F Degrees K Degrees R Ohms -79- Revision 4.3 3/2004 Note: EUNIT_15 through EUNIT_19 commands apply only when a temperature module is installed in one of the MDI ports HOLD? Returns the status of the display hold feature HOLD_1 HOLD_0 KEYLOCK? KEYLOCK_1 KEYLOCK_2 Activates hold Deactivates hold Returns the status of the keylock feature Activates (locks out) front panel access Deactivates front panel keylock LAMDIERR? Returns the value of the last error code MINMAX? Returns the min and max values for each installed module PORT? Returns a value representing the current port configuration PORT_0 Set left display to pressure right display to Ma PORT_1 Set left display to Ma and right display to pressure PORT_2 Set left and right displays to pressure PORT_3 Set left display to left minus right differential display PORT_4 Set right display to left minus right differential display PORT_5 Set left display to left plus right PORT_6 Set right display to left plus right TARE? Returns status of tare function TARE_1,_0 TARE_0,_1 TARE_1,_1 TARE_0,_0 ZERO Zeros installed sensors ZERO_0,_1 ZERO_0,_1 ZERO_1,_1 Revision 4.3 3/2004 Activate tare on left display only Activate tare on right display only Activate tare on both displays Deactivate Tare on both displays Zero left display only Zero right display only Zero both ports -80- APPENDIX E RTD PROBE CONNECTOR SWITCHCRAFT TINI QG (TA4F) PIN 1 2 3 4 FUNCTION 2W+ 4W+ 4W– 2W– 2 WIRE RTD TA4F 1 2 3 4 3 WIRE RTD TA4F 1 2 3 4 4 WIRE RTD TA4F 1 2 3 4 -81- Revision 4.3 3/2004 APPENDIX F Certification of the TC1 Thermocouple Interface Module THEORY With the TC1 module installed in the base unit (set-up to display in mV), a precision millivolt calibrator/supply will apply a known mV signal to the module/base unit system (simulating the Seebeck voltage) in place of a thermocouple. The applied mV signal can then be read on the base unit display and compared to the nominal input provided by the precision millivolt calibrator/supply. The TC1 module cannot be adjusted. If the module will not meet the specified accuracy, contact the factory or instrument supplier. CERTIFICATION PROCEDURE 1. Remove all existing modules from the base unit (handheld calibrator firmware rev. 3.01 or later, digital indicator firmware 2.00 or later) and install the TC1 in the either module bay. 2. Attach copper wire to the + and - terminal posts of a precision millivolt calibrator/source, rated at .0025% or better. 3. Wire the opposite end of the wires to a miniature “U” type (copper-copper) thermocouple connector, and plug the connector into the receptacle located in the top of the TC1 module. 4. Turn on the millivolt calibrator/source and adjust until it is supplying 0mV to the TC1 module. 5. Turn on the base unit by pressing the on-off switch. Allow the base unit to complete its startup routine. 6. Press the “Setup” button. 7. Using the arrow key, toggle once to the right and down 7 times until “TCmodule” is flashing. 8. Press enter. 9. Set engineering unit to “millivolt” by pushing the right arrow button until “mV” is flashing. 10. Press enter. 11. While the precision millivolt calibrator/source is providing 0mV to the module, read the mV display on the base unit. 12. If the reading is within ± .01 millivolts, the base unit/TC1 system is within specification and may be certified. 13. Repeat the certification procedure at 50 and 100 mV. Revision 4.3 3/2004 -82- -83- Revision 4.3 3/2004 Visit our web site www.heise.com All specifications are subject to change without notice. All sales subject to standard terms and conditions. © Copyright Ashcroft Inc. 2005 I&M002-10091-11/00 (HST-MAN) 1P6/00 4P7/06 250 SP Revision 4.3 3/2004 Ashcroft Inc. 250 E. Main Street Stratford, CT 06614, USA Tel: (203) 378-8281 Fax: (203) 381-9042 email: [email protected] @ashcroft.com ">

Public link updated
The public link to your chat has been updated.
Advertisement
Key features
- Modular Design
- Interchangeable Quick Select Modules
- Pressure and Temperature Measurement
- RTD and Thermocouple Interface
- Simultaneous Measurement
- Leak Detection
- Flow Velocity Measurement
- Data Logging (Optional)