AirCom VGR-D4 Owner's Manual
AirCom VGR-D4 is a versatile flow control device designed for precise measurement and control of gases. Its compact design and user-friendly touch screen interface make it suitable for a wide range of applications. This device can be powered from a standard AA battery, USB micro-B charger, or an external power supply. It offers features like integrated temperature compensation, flow totalizer, and adjustable filter settings.
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MASS FLOW METER Series VG Manual ! This symbol alerts the user to important operating, maintenance and servicen information. IMPORTANT INSTRUCTIONS ! • Do not remove the electronics housing. A damaged hologram seal will void the warranty. • There are no serviceable parts inside the unit. • Repairs must only be performed by qualified personnel ATTENTION ! This unit has several power supply possibilities. If you use the external 24 Vdc power supply, it is strongly recommended to have this device grounded. SUBJECT TO CHANGE ! Due to our policy of ongoing product development, we reserve the right to change the information in this manual without notice. RECYCLING Note the existing regulations of your country. TOXIC, FLAMMABLE GASES AND ATEX ! In the case of toxic and flammable gases, the respective safety guidelines in each country must be followed. This VG-device is NOT Ex certified. In the case of flammable and toxic gases, fittings, cable glands and pipes intended for that purpose must be used. The responsibility for safe operation lies with the user and designer of the facilities. OXYGEN SERVICE ! AirCom Pneumatic GmbH is not liable for any damage or personal injury, whatsoever, resulting from the use of our standard mass flow meters or controllers for oxygen gas. You are responsible for determining if this mass flow meter or controller is appropriate for your oxygen application. You are responsible for cleaning the mass flow meter or controller to the degree required for your oxygen flow application. RECEIPT OF YOUR INSTRUMENT When receiving the instrument, carefully check the outside packing carton for damage that may have incurred during shipment. If the carton is damaged, notify the local carrier and submit a report to the factory or distributor. Remove the packing slip and check that all ordered components are present and match your specifications (as ordered). Make sure any spare parts or accessories are not discarded with the packing material. Do not return any equipment to the factory without first contacting AirCom Pneumatic GmbH. INSTALLATION Please note before the start-up: ! • Do not use sealing tape or liquid sealant • Piping must be cleaned before installation of instrument. Products in this manual may contain metal or elastomer seals, gaskets, o-rings or valve seats. It is the “user’s” responsibility to select materials that are compatible with their process and process conditions. Using materials that are not compatible with the process limitations of the device, may result in equipment damage and/or personnel injury or death. It is recommended that the user check the devices on a regular schedule to ensure that it is leak free as both metal and elastomer seals, gaskets, o-rings and valve seats may change with age and exposure to process gas.. POWER ! If it becomes necessary to remove the instrument from the system or change a battery, the power to the device must be disconnected. Always switch off the power before you disconnect terminal connections in potentially dangerous surroundings to avoid sparks. TABLE OF CONTENTS 1. Introduction 1.10 Features of mass flow meter series VG 1.11 Instructions and warnings 1.12 The measurement principle 1.13 Real, Standardized and Normalized flow 1.14 CMOS technology 1.15 Block diagram 3 3 3 3 4 5 5 2. General device specifications 2.10 Safety 2.11 Electrical data for series VG 2.12 Battery 2.13 Optionale Module 2.14 Operation with other gases 2.15 Pressure loss 2.16 Temperature compensation 2.17 Pressure compensation 2.18 Response time 2.19 Filter settings 6 7 7 7 7 8 8 9 9 9 9 3. Installation and commissioning 3.10 Mounting position and mounting location 3.11 Requirements for pipework 3.12 Fittings and filters 3.13 Filters / Gas cleanliness 3.14 Electrical power supply 3.15 How to replace the battery 3.16 Warm-up time 10 10 10 10 11 11 11 11 4. Operating 12 In case of improper operation, the measurement or control function of the device may be impaired or even completely fail. 4.10 Introduction 12 4.11 Main Menu 14 4.12 Settings 19 5. Maintenance 5.10 Cleaning 5.11 Returns 23 23 23 6. Appendix 6.10 Troubleshooting 6.11 Dimensional drawings ¼“ in mm 6.12 Dimensional drawings ¼“ in Zoll 6.13 Dimensional drawings ½“ in mm 6.14 Dimensional drawings ½“ in Zoll 6.15 Wetted parts series VG 6.16 Overview Default settings 24 24 25 25 26 26 27 28 7. Overview menu VG mass flow meter 30 1. INTRODUCTION Thank you for choosing devices from the VG series. These operating instructions will help you to install and operate the measuring devices. Please read through these instructions carefully before installing the devices. Our aim has been to write a full and practical guide. We would be grateful if you would notify us of any shortcomings or mistakes. Please contact your sales partner if you have questions about any aspect of the products. 1.10 FEATURES OF VG MASS FLOW METERS In developing and manufacturing the devices, we have focused primarily on customers and their applications. Our aim is to implement customers' requirements in the form of new developments or enhancements on an ongoing basis. The essential features are: • Compact design • Dot-matrix LCD touch screen • Multiple gases possible (3 gases) • Flexible due to the many different settings accessible through the touch screen • Back-light screen in USB and 12…30 Vdc power mode • Power also possible with USB micro-B connector • Optional alarm module with power, 3 contacts and 2 inputs • Display can be rotated 180 degrees • Fast and accurate measurement and control • Integrated temperature compensation and flow totalizer (standard) 1.11 INSTRUCTIONS AND WARNINGS Read all of the operating instructions thoroughly before installing and commissioning equipment. Misconceptions and incorrect use can lead to breakage of the measuring device or risk of personal injury. Should one of these cases occur, the responsibility lies solely with the operator of the device. The installation, commissioning and operation and maintenance must be done by appropriately qualified personnel. 1.12 THE MEASUREMENT PRINCIPLE The thermal mass flow measurement principle is particularly suitable for the measurement and control of clean and dry gaseous media. The most significant advantage is that the measurement process measures the real mass flow and is largely independent of temperature and pressure. Stated simply, the thermal measurement principle measures the heat transport by gas flowing past. In the case of VG mass flow measuring instruments, a constant heat input gives a flow-dependent temperature difference (ΔT). Two temperature sensors are positioned in the measuring channel (T1, T2), one before the heating system (H) and one after it. If there is no flow, the heat spreads symmetrically in directions T1 and T2. The temperature difference T1-T2 is therefore zero. Flow rates > 0 create a temperature difference. The sensor T1 at the inlet is cooled by the gas flowing past it, and the temperature of the second sensor T2 rises due to the heat drawn from the heating system. The temperature difference is related non-lineary to the mass flow, with very high repeatability. The electronics will, based on the calibration, convert this temperature difference in a linear and proportional indication of the mass flow of the gas. 1.13 REAL, STANDARDIZED AND NORMALIZED FLOW The user-selectable engineering units of the red-y compact has been divided in two groups: “Real and Normal” units and “Other units” This separation is not only there to find the unit you want to select quicker, it also separated the “Normalized flow” from the “Standardized flow” The redy compact has basically 2 reference conditions: One for “Real and Normal” units and one for “Other units” The factory setting is as follows: 1) For all units that are used in "normal" (like ln/min), the reference conditions are always 0°C and 1013.25 mbara. This cannot be adapted. 2) For all the other units that are “standard” (like ls/min and sccm) and the l/min the reference conditions has to be be defined when the unit is ordered. The reference value for all units that are not “Normal” or “Real” it has to be defined with the purchase order. It cannot be changed after the units has been delivered. On the sticker of the red-y compact we will mention a reference condition. This reference condition is for the “Standard” units only. The “normal” units will always be 0°C and 1013.25 mbara. In future version of the firmware the reference conditions will be adjustable in the menu. 1.14 CMOS TECHNOLOGY The VG measuring and control devices are equipped with an innovative CMOS semiconductor sensor that sets new standards for accuracy, speed and measurement dynamics. With our CMOS technology the sensor element, amplifier and A/D converter form a single silicon chip. 1.15 BLOCK DIAGRAM The following GCM block diagram shows the structure of the device. The block diagram does not show the optional manual control/needle valve (Model VGR) that would normally be placed on the outlet of the unit. 2. GENERAL DEVICE SPECIFICATIONS Media (real gas calibration): Air, O2*, N2*, He, Ar, CO2, H2, CH4, C3H8 (other gases and gas mixtures on request) *O2 & N2 are calibrated with air. Accuracy: Eco ±2.0% of full scale; Ranges > 200 ln/min ±3.0% of full scale Special ±1.0% of full scale (only G¼” instruments and real gas calibrations) Dynamics: Eco 1:50 (Meter reads zero if flow is less than 1.7% of full scale) Special Special: 1:100 (Meter reads zero if flow is less than 0.83% of full scale) Response time: Maximum 300 msec (filter setting dependend) Flow update by sensor 40 ms (Battery mode 500 ms) Display update 240 ms (Battery mode 500 ms) Repeatability: ±0.5% of full scale Long-term stability: < 1% of reading / year Temperature coefficient: < 0.025% FS measuring range type per °C < 0.012% FS measuring range type per 1°F Pressure coefficient: < 0.2% / bar of reading (typical N2) < 0.014% / psi of reading (typical N2) Working pressure range: 0.2 - 11 bara (3-160 psia) Test pressure: 16 bara (232 psia) Storage conditions: -20 to 80°C (-4 to 176°F), 0-95% RH, non-condensing Temperature range: 0 – 50°C (32 bis 122°F), 0-95%, RH, non-condensing Do not expose device to direct sun light. Warm-up time: Materials Electronics housing: < 5 sec. for full accuracy ABS (Acrylnitril-Butadien-Styrol) Body Material: Anodized aluminium or stainless steel 1.4404 (316L) Sensor area: Silicon, glass, epoxy Seal material: FKM, optional EPDM (FDA compatable) Wetted parts: See appendix (see chapter 6.17 Wetted Parts List) Integration Display: Process connection: Touch display 128x64 px Backlighted only with external power supply (Micro-USB or 24 Vdc) G¼" (BSPP* female) up to 60 ln/min, G½" (BSPP* female) up to 450 ln/min *British Standard Pipe Parallel Inlet section: None required Mounting orientation: Any position (consult manufacturer above 5 bara (72 Psia) if the compact will be mounted vertical) Connection cable: For external power supply: 2 m with loose ends (fly leads) 2.10 SAFETY Test Pressure Leak rate to external: Protection class: EMC 16 Bara (232 psia) 1 x 10-6 mbar*l/s He IP-50 EN61326-1 2.11 ELECTRICAL DATA Supply voltage: Power supply VG meter & regulator Standard AA battery Option: External power 8...30 Vdc, 120 mA. We recommend a power supply with a minimum current of 150 mA. 2.12 BATTERY The battery operated compact 2 can operate on any common AA battery. The lifetime is strongly dependent on the usage and the quality of the battery. In general we can state that the battery lasts for about 3-6 months under non-continuous use. (see Note 1+2) We recommend to use external power (USB micro-B or 24 Vdc) if you application needs continuous measurement like measuring totalized fl ow. To extend the lifetime of the battery, the back-light is disabled during battery operation, you cannot activate it. We strongly recommend to use the “auto power off” in the menu for battery driven devices (see chapter 4.12.7 Battery auto off) More information on the battery in chapter 3.14 Electrical power supply and 3.15 How to replace the battery?. Note 1: When we supply the unit, the “auto power off” will be set to 15 minutes Note 2: The unit can be set to performance mode when powered from the battery, this will strongly increase the battery usage. See chapter 4.12.1 Measurement for more information. 2.13 OPTIONAL MODULES As an additional option you can purchase a power supply or an alarm module. The power supply module, is provided with a voltage from 8 to 30 Vdc, will power the unit. The unit comes with a 2 meter cable. The alarm module can in addition to the above power module, provide 3 customer individually settable alarms and 2 inputs. The module is supplied with a 2 meter fly-lead cable. Each of the 3 alarm contacts can be configured as high, low, window and totalizer alarm. Once the alarm becomes active, the 3 potential free alarm contacts can be reset in many different ways. Automatic, through the touch screen or with one of the 2 input signals. Other options like hysteresis settings and delays are also available. For detailed information see 4.11.2 Alarm Menu in this manual. ! ! Both the power and the alarm module are mounted similar to the battery module (see 3.15 How to replace the battery). They replace the battery module, so you cannot use these modules in combination with battery power. An external magnet can unintentionally influence the alarm contacts. Generic specifications optional alarm module Power input: Voltage supply range : 8… 30 Vdc (Power supply hereafter refered to as the 24 Vdc power supply) Max. current : 300 mA Protection input: Polyfuse (trip current > 500mA) and reverse polarity protected Switch ratings switch 1 + 2 (SPST hard contact): Maximum current 0.5 A Maximum voltage 30 Vdc Relais lifetime > 5 Mio. Switch ratings switch 3 (DPST contact): Maximum current 0.5 A Maximum voltage 30 Vdc Relais lifetime > 5 Mio. Inputs 1 + 2 (Opto-couplers): Voltage range (polarity sensitive): 5 – 30 Vdc (@ 5mA max) Min. recommended pulse width 100 msec (Sample interval: 20 msec) 2.14 OPERATION WITH OTHER GASES Each measuring device can store data for up to 3 types of gas or operational states that need to be defined at the time of purchase. ! Note: Please note that, among other effects, the zero-point error (offset display) will be higher if the device is not operated with the type of gas, for which it had been calibrated. A difference in zero indication is also possible if the 2.15 PRESSURE LOSS Our thermal mass flow meters have a low pressure drop. The pressure drop depends mainly on the medium, the pressure conditions and the flow rate. Please note that the size of the pipes has a large effect on the pressure loss. For example from around 60 ln/min, we recommend a pipe inside diameter of at least 10 mm. Please also note that some fi ttings have a reduced diameter and can cause considerable pressure drop in your system. Be especially careful with vacuum applications, please select a relative big pipe diameter). 2.16 TEMPERATURE COMPENSATION The thermal mass flow meters measure the mass flow of gases, the result being largely independent of pressure and temperature. In addition to the fundamental principle an internal sensor measures the gas temperature and, with the help of a 3-dimensional table of interpolation values, a correction factor is calculated automatically. The flow indication is thus temperature-compensated. 2.17 PRESSURE COMPENSATION During calibration, the specified operating pressure is taken into account. Changes to the pressure conditions may introduce an additional error. This is around ±0.2% per bar. Please note that the control behavior is influenced by substantially different pressure conditions. (relevant for units with an intergrated needle valve only) 2.18 RESPONSE TIME The response time is time required to display 98% of its final value after a sudden change in flow. This response time for the compact 2 is around 300 ms but is dependent on your filter settings. On battery operation you might experiencea slower response time than on external power. (See chapter 4.12.1 Measurement for more information.) 2.19 FILTER SETTINGS The filter settings smoothens the reading of pulsating or noisy flows. It can be set through the set-up menu. Higher filter settings will slow down the response time of the unit. (Please always first try to find and remove the cause of your noisy or pulsating flow e.g. add volume to your system). More information on the filter settings in chapter 4.12.4 Filter 3. INSTALLATION AND COMMISSIONING 3.10 MOUNTING POSITION AND MOUNTING LOCATION Although the recommend mounting position is horizontal, the unit can used be upright, vertical or upside down. With a vertical mounting position, dependent on the type of gas and at pressures above 5 bara (72 psia, 500 kPa(abs)), a zero-point offset can be possible. This effect is caused by convection in stationary media. With regard to mounting location, the following situations can cause problems: • • • • • Strong heat sources, or ambient temperatures outside the specification Strong sources of electromagnetic radiation such as spark discharges Humid environments and the associated condensation lead to damage of the electronic components In general, aggressive environments reduce the service life. Liquid running backwards can penetrate into the measuring instrument. An elevated mounting location generally helps, or using check valves. If your ambient air contains high humidity and at night the temperature goes down, it is possible that you will get some condensation inside the unit. Please take precautions to avoid this. • ! At installation make sure to respect the flow direction of the gas. It is indicated by an arrow on the back side of the instrument’s housing. 3.11 REQUIREMENTS FOR PIPEWORK The most common causes of faults concern the way that devices are connected to the gas supply. Please note the following points: • The pipes must be absolutely clean. Please flush them before installing the measuring instruments! • Please ensure there are no pieces of thread sealant (f.i. Teflon tape) in the piping! • Use appropriate pipe materials (pressure rating, durability) Even when connected to fixed pipework, we recommend that the devices are mounted using the appropriate mounting holes • From 60 ln/min, we recommend the following flow-calming sections of straight and unobstructed straight tubing: Inlet: 10 x diameter; outlet: 5 x diameter • Use appropriate fittings (see chapter 3.12 Fittings and filters). • Malfunctions can be caused by unstable pressure controllers, pumps that oscillate, and volumes before and/or after the measuring device that are generally too small. Install an air reservoir with 2 liter volume in the feed pipe (2 liter is an example, the volume depends on the application). • The size of the pipe must be matched to the measuring/control device. A diameter that is too small results in an increased pressure drop. • Check for any leaks before commissioning the devices. • For maintenance work, we recommend that a bypass system is used. This is particularly important where the gas supply must not be interrupted. SEALANTS The design of the devices enables sealing at the ends with O-rings or flat seals. It is essential that you avoid: • the use of sealing tape to seal threads. Small pieces can cause incorrect measurements and controlvalve malfunctions. As well as that, if the device has to be checked or recalibrated, there will be an extra charge for the additional cleaning work. • sealing with liquid sealants will incur a higher cleaning charge for cleaning the device in an ultrasonic tank. 3.12 FITTINGS AND FILTERS You can order a wide range of process fittings and adapters for the compact. Some compression fittings are available with an internal 50μ filter. Please refer to our website contact you local distributor for more details. Please also consider that fittings and filters can create additional pressure drops over the flow meter. ! Please note that the length of the tread on you fitting that is screwed inside the body is for the G¼˝ no longer than 10mm (3/8”) and for the G½˝ no longer than 13mm (½˝) to avoid internal damage. 3.13 FILTERS / GAS CLEANLINESS We always recommend that a filter, or at least a fine-mesh sieve (50 microns), is installed before the measuring devices. It often happens that solid matter such as welding residues, metal or plastic chips, rust, sealing tape, etc. affect the function. In pressurized-air applications using compressors, the air must be dry and free of oil. Please ensure that a suitable processing unit is located before the devices. In the case of gases from cylinders, in general no filter is needed. 3.14 ELECTRICAL POWER SUPPLY The VG series can be provided with power from a standard AA battery or from a common USB micro-B charger that you typically use for the charging of your android phone. There are optional modules by which you can apply a 8 to 30 Vdc external power. The lifetime of the battery strongly depends on the type and quality of the AA battery you use. We recommend (and determine the specifications with) an Alkaline-Manganese Dioxide Battery with a capacity of 3000 mAh (ANSI: 15A IEC: LR6). Other types of batteries (for instance Zinc Carbon, Zinc Chlorine, NiCd, NiMH or Li-ion) can be used, as long as the voltage is 1.2 to 1.8 Vdc. Using other batteries will influence the life of the battery when used in the red-y compact 2 flow meter. It is also possible to use rechargeable batteries, but the unit will however not charge the battery if powered by the USB micro-B. We strongly recommend to remove the battery from the case if you do not use the meter for longer periods of time to avoid damage to the flow meter in case the battery starts to leak. The unit will retain its settings so when you re-insert the battery the settings will be the same as when you took it out. (The totalizer will be stored to the non-volatile memory once every 10 minutes, so the stored value will never be older than 10 minutes) There is no need to remove the battery if you connect the USB power supply. When you run the unit on power from the USB micro-B and have a battery inserted, you can remove the USB connector and the battery automatically takes over. When the unit is powered by the battery you will not see the backlight to conserve energy. The backlight is only operational when there is a power supply other than a battery and the unit is not in ECO mode. (When you replace or install a battery, all power to the unit should be disconnected.) 3.15 HOW TO REPLACE THE BATTERY? When you replace or install a battery, all power to the unit should be ! disconnected. The battery is in plastic compartment mounted above the body and connected to the main display/electronics housing. This plastic part has 3 notches on each side. With one hand hold the housing on the sides of the display and with your other hand grab the side where the plastic notches are located. Pull the battery compartment from the main housing. Replace the battery and push the battery compartment back on the main housing. By pushing the battery compartment into place you automatically connect the battery to the electronics. It will take a few seconds for the meter to start up. You have to press the screen for about 3 seconds in order to switch the unit on. Replacing the battery will not automatically turn on the unit. Inserting the battery incorrectly will not damage the unit. 3.16 WARM-UP TIME All instruments of Series VG are ready for use within seconds of connecting the power. There is no significant warm-up time (<5 sec). 4. OPERATION ! In case of incorrect operation of the flow meter the measurement function can be impaired. 4.10 INTRODUCTION The Series VG has a touch screen based on pressure. You can operate the screen with your finger or an object that does not create any scratches on the display. The display has a backlight that only operates if the unit is powered by an external power source. To start the unit, insert a battery or connect an external power supply (USB or 24 Vdc). Press the screen for at least 3 seconds until the unit switches on. When connecting the unit to an external power source it will be turned on automatically. Once you switch the unit on you are able to access a menu structure with which you can adjust the meter for your specific applications and preferences. Before you put the unit into operation verify that the unit is suitable for your application (gas, range, pressure and temperature). You find these details on the supplied calibration sheet. If any of these ! details deviate from your application please contact the factory. The flow direction indicated by an arrow on the back side of the housing has to be respected. 4.10.1 START-UP SCREEN When the unit starts up, it will show a startup screen for 4 seconds (Screen name: Sensor mode). After this screen you will see the main home screen that indicates the primary values. The home screen can be shown in horizontal or vertical mode (see figures above). On the right top you see the battery icon or the symbol for external power. The bar graph represents the current flow graphically. The display also shows the selected gas and the selected measuring units. Note: If you hold the screen too long during start up, you get into the “service mode”. Hold the display for 6 seconds to leave the service mode. Note: The display has a vertical and horizontal home mode. The unit will select the mode depending on the position of the flow meter. In chapter 4.12.2.3 Orientation you will learn how to adjust the display position manually.Display flow reading resolution. 4.10.2 RESOLUTION OF FLOW INDICATOR The VG series has the ability to show the actual flow in many different engineering units. This means that the number of digits in the readout can change a lot. In automatic resolution mode the VG series calculates the required number of digits depending on the range and selected units. This resolution is however adjustable by the user (See chapter 4.12.5 Resolution). 4.10.3 ALARMS AND NOTIFICATIONS ON HOME SCREENS Flow Rate If the flow is higher than 108% of the calibrated full scale, the message: “OVF” will be shown in the “Alarms and notification” section in the top of the screen. If you select an engineering unit for the flow indication that has too many digits to display for the range of the unit, the area where the flow is normally displayed, will show: “Out of range”. Select a different flow unit in section 4.12.3 Units. Totalizer If the totalized value exceeds the 8 available digits or you selected a totalized unit that exceeds the current totalized flow, the totalizer will show all 9’s on it display. (9999999). You will have to select an engineering unit for the totalizer indication that is big enough to show all totalized flow (for instance m3n or kg). Select a different flow unit in section 4.12.3 Units. Alarm notifications If you make use of the optional alarm module you will see the status on the main screen. More information on the Alarm module see chapter 4.11.2 Alarm Menu. 4.10.4 HOME SCREENS AND MENU ACCESS The VG series has in horizontal mode the following customer selectable “home screens” (In vertical mode there is only one “home screen”.): These home screens are: „Overview“: Shows flow + flow totalizer + bar graph „Flow“: Shows flow in big digits „Total“: Shows the totalized fl ow in big digits „Alarme“: Alarm screens 1 to 3 (or notifi cation if no alarm module is connected) ** only active with alarm module You can switch between the home screens by touching the screen for less than one second. It is possible to hide screens with the display menu. (See section 4.12.2.1 Home screen) Home screen 1: Screen which shows both the actual flow and the totalizer in smaller digits. The bar graph represents 0-100% of the maximum flow range. The A1, A2 and A3 represent the alarms and only show when you have installed the optional alarm module. Home screen 2: Screen which shows the actual flow. Home screen 3: Screen which shows the totalized flow in big digits. Home screen 4 to 6: Screens dedicated to the individual alarm (Each alarm has its own page. Here you can read the main settings of an alarm. If the alarm is activated you can reset it here if the manual reset is activated. These screens are only relevant if the alarm module is installed. If you touch any of the home screens longer than one second you will access the Main Menu. You will see the screen shown on the right. The menu will always be displayed in horizontal mode. From this menu you can modify your preferences and access the alarm settings menu. If you have the password activated, you have to enter your passcode before you have access to the Main menu (See 4.12.6 Security). 4.10.5 BUTTONS AND SELECTION Each menu has a name (See top inverted bar) and on the upper right you see 2 numbers (example 1/6). The first number shows which item you selected, the second number how many items there are in the menu you selected. At the bottom of most screens you find the inverted buttons. Meaning of buttons: Return: Return to the previous menu. If you hold it for longer than 0.5 sec you return to the home screen Up/down: increase/decrease (you can also select a menu item by touching the relevant line) Select/confirm: Store selected value 4.11 MAIN MENU NOTE: The menu is only available in horizontal mode Below is an overview of the main menu structure and a 2 page complete version can be found on the last pages of this manual. 4.11.1 MAIN MENU > Alarms ** > Totalizer > Gas selection > Settings > Info Power off / Reboot* In the main menu you have access to the Alarms, totalizer settings, gas selection, settings, information about the status and settings of your unit. If your unit is battery powered, it will give the option “Power off” on the bottom line. If the unit is externally powered it will give you the option to “Reboot” the unit. ** Alarms will be visible but if the Alarm module is not installed this menu option cannot be used. 4.11.2 ALARM MENU If you have installed the optional alarm module and once the alarm function is selected from the main menu, you can select which of the 3 alarms (A1, A2 or A3) you want to configure. Please note that alarm 3 has a different contact type and capacity than alarms 1 and 2 (see diagram in 2.13 Optional Modules). If an alarm has already been configured the primary function is mention behind the Alarm (Example A1: flow high). 4.11.2.1 SELECT ALARM MENÜ Once you selected A1, A2 or A3, you go into the specific alarm menu. You have the following options: Enable (Default: disabled): If you active this, the alarm becomes operational. You can see that an alarm is enabled on any home screen. If an alarm has been enabled the corresponding alarm name is shown underlined (see picture on the right). Reset: If applicable you can manually reset an alarm here (The other reset location is on the alarm home screen). If the alarm is enabled you see a star behind the word “Reset”. Function: With this submenu you can set the function of the alarm (Options: Flow high, low or window and totalizer). For more details see next page. Configure: In this menu item you can set the details of the alarm like it alarm value(s), how the alarm is reset, Alarms delays, hysteresis and more. For more details see next page. 4.11.2.2 FUNCTION ALARM MENÜ Under the function alarm item you define the functionality of the alarm Flow high (Default): with this function the alarm gets activated if the flow goes over a predefined value set in the threshold by the customer. Flow low: with this function the alarm gets activated if the flow is under a predefined value set in the threshold by the customer Flow window: with this function the alarm gets activated if the flow is outside a “Window” that is predefined by the customer. For example if upper threshold is set to 5 and lower threshold to 4 the alarm will get active if flow is lower than 4 or higher than 5. Totalizer: The compact has 2 build in totalizer. One is permanent and non-resettable. The second one is a resettable totalizer. You can bring it back to zero (see 4.11.3 Totalizer) The totalizer alarm works with the resettable totalizer. You enter a value in the threshold and once that value is reached the alarm is activated. 4.11.2.3 CONFIGURE ALARM MENÜ Once you defined the function of an alarm you can define the details of the operation in this menu. Numerical entry screen: If you have to enter numeric values (Like an alarm value (Threshold)) you will see a little keyboard on the screen where you can enter a numerical value. The decimal point is located behind the number display field. Once you entered a decimal point followed by another number, the dot changes into an “E”. If you press this you can enter the scientific notation, for instance 1.0E-3 = 0.001 or 2.2E2=220. Threshold is the activation value. If you for instance selected a high alarm, the alarm will be active when the flow value comes over the Threshold value. The value is entered in flow engineering values that the unit is set for at that moment (for instance in mln/min). If you change the engineering units of the unit in a later stage, the Threshold value will automatically adjust itself to the new flow unit. ! Please note that there is no limit to the value you can enter as a threshold. Please double check your entered value. Hysteresis (Default: 0=OFF): The hysteresis is the difference between the value where the alarm turns ON from turning OFF and the value where it turns OFF from turning ON. This difference is defined in % of full scale. In figure 10 an example of a 50% threshold value high alarm with a 10% hysteresis. The blue line in the top graph reflects the gas flow, the vertical dotted lines the switching points. The blue area’s in the graph below is where the alarm is activated. The reset is set to automatic. ! Please note that you can enter a value of 100% as hysteresis value. If you do that the alarm will no longer switch off. Alarm delay (Default: 20ms): The alarm delay is a delay in milliseconds between the moment the alarm situation occurs to the moment that the alarm is activated. It can be set from 20 to 9999999 msec (=2.777 hr). Alarm duration (Default: 500ms): The alarm duration is minimum time that the alarm is active after it is activated. It can be set from 100 to 9999999 msec (=2.777 hr) Note: This function is only active if the reset is set to automatic. Reset source (Default: Manual): The alarm can be reset in different ways. Below a list of the 4 possible settings: Automatic: The alarm is reset the moment the alarm situation is no longer valid. This unless you programmed an alarm duration. For a totalizer alarm this setting will reset the totalizer as soon as the threshold has been exceeded. Manual: The alarm stays active until you manually reset the alarm through the touch screen of the flow meter. Input 1: The alarm stays active until you activate input 1 Input 2: The alarm stays active until you activate input 2 Reset trigger: (Note: this function only relates to alarm reset by input 1 or 2). When you use input 1 or 2 as an alarm reset, you can set exactly on which action the alarm is reset. If for example the input is a manual push button, the rising edge is the moment that you push the button and the falling edge the moment when you let go of the push button. ! Please note that the reset overrides the alarm. Even if the alarm is still valid, if you set this reset trigger to high level, the alarm is ignored until the level becomes low again. If the blue represents the input being active you can see the different trigger points below. Output driver (Default: Normal): the output driver setting offers the possibility to invert the action from the alarm switch and set the alarm to a predefined state which is convenient for testing systems. The “Always low” and “Always high” override all alarm settings and flow signals. Please make sure that you take precautions before you use these options in a “life” system. 4.11.3 TOTALIZER The totalizer calculates how much gas has totally passed through the flow meter based on the measured flow and the factor time. The instrument has 2 totalizers. Each can display a maximum of 8 digits. The totalizer value will be stored internally as an IEEE 754 floating point number. The internal totalizer will never rollover, the maximum value far exceeds the lifetime of the instrument. One of the two totalizers is resettable, the other can never be reset and always continues to count for the lifetime of the instrument. Both the totalizer values are stored every 10 minutes in a permanent memory so even if there is no power supply the last stored value will still be kept. If you apply power again the saved value will be restored (Unless you activated the “reset on start” feature). Please note that if the flow rate exceeds the full scale of the unit (overflow), the totalized value will not be correct. Even if there is an overflow the totalizer operation will continue normally. However since the flow value is limited the totalizer is totalizing the limited flow value only. If the totalizer value exceeds the possible 8 digit display, you can set the totalizer engineering units to a suitable unit that can display the value within the 8 digits, for instance m3n or kg. See section 4.12.3 Units. Reset: Reset the resettable totalizer to zero Reset manual: Select this option to manually reset the resettable totalizer Reset on start: Activate this option if you want that the resettable totalizer is set to zero every time you switch the unit on. Please note: Upon start-up the totalizer will be silently reset without asking for confir mation. It simply resets the resettable totalizer to zero every time you switch the unit on. Remark: With the alarm module it is possible to reset the totalizer with an external remote switch or signal. Read: Read the totalizers (for instance in-case you only activated the flow screen). N: is the non-resettable totalizer, R: is the current value of the resettable totalizer. Home screen view: Here you can select if you want to read the Non-resettable or Resettable totalizer on the main screen. 4.11.4 SETTINGS In this menu you can adjust your preferences. See section 4.12 Settings for details. 4.11.5 INFO Info brings you to menu that informs you about the current configuration of the unit. When you select “Software” under the Info menu you can see the current firmware version and the date that this version was released. Under “Configuration” you see the active settings for the flow and the totalizer. The temperature and pressure refer to the reference conditions for the selected flow units. (See 1.15 Real, Standardized and Normalized flow) 4.11.6 REBOOT OR POWER OFF If your unit is battery powered, it will give the option “Power off” in the main menu. You can switch the unit on again by touching the display for 3 seconds. If the unit is externally powered it will give you the option to “Reboot” the unit. “Reboot” restarts the unit. If you select one of these options the unit will ask you to confirm your selection. 4.12 SETTINGS In the settings menu you can adjust the user variables. See the chapters below for more details. 4.12.1 MEASUREMENT The compact has 2 measurement modes. When you set the measurement to “Auto”: 1) When on battery it takes a flow sample every 300 milliseconds and due to that extends the battery life 2) When on external power (24 Vdc or USB) it takes a flow sample every 40 millisecond and due to that will have a faster response and a more accurate totalizer when you have fluctuating flows. With this menu you can force either measurement mode independent of the power source. Please note that when you set the measurement mode to “Performance” and you use the unit on battery the battery life is limited. If the measurement setting is forced to “performance” and the unit is operating on the battery, the display shows “PERF”. If the measurement setting is forced to “Economy” and you use an external power supply the display shows “ECO”. Please note that in “ECO” mode the backlight is always off. 4.12.2 DISPLAY In the display menu you can configure the settings for the display. Below you find more details on the individual settings of the display. 4.12.2.1 HOME SCREEN There are 6 different home screens in horizontal mode (one in vertical mode) (See chapter 4.10.4 Home screens) and in this menu you can deactivate up to 5 of the home screens. Deactivated screens do not show up as a home screen. 4.12.2.2 BACKLIGHT In this menu you can select the brightness of the backlight. The backlight is only available if you use an external power or 24 Vdc. 4.12.2.3 ORIENTATION The screen can be orientated (turned) in the most convenient position for reading (upside down or vertical). If this menu is set to Auto, the unit will do this automatically. A sensor determines it’s orientation. The sensor can be overridden with the 0, 90, 180 or 270 degrees settings. This is very convenient if you want the gas inlet to be on the right side of the flow meter or place the meter vertical. Note: The menu can only be displayed in horizontal mode and the vertical screen mode has only one “Home screen”. Remark: at installation make sure you respect the flow direction of the gas indicated by an arrow on the rear of the instrument. 4.12.2.4 DISPLAY AUTO OFF The display can be set to switch off after a defined time following your last touch event. If you set the “Display auto off” to “Disabled”, the display stays on till the power is switched off. When the display is switched off, the backlight will also switch off. The totalizer is still working. You can activate the display again by touching it. 4.12.2.5 LIGHT AUTO OFF In this menu you can define a time before the backlight automatically switches off (after the last touch event). The backlight goes on again when you touch the display. When the setting is “Disabled” the light is continuously on. When the backlight is switched off you can still read the display. The backlight only works if there is an external power connected. On battery power supply or in ECO mode the backlight is not operational. 4.12.3 UNITS (EINHEITEN) In the Units menu you can set the required engineering units for the totalizer and the flow indication. If there is a unit selected with too many digits, the device will show: “Out of range” on the display. If you select a totalizer unit that would create too many digits the totalizer will show 9999999. More information in section 4.10.3 Alarms and notifications on homescreens. For more information on “normal” and “standard” flow units see chapter 1.15 Real, Standardized and Normalized flow of this manual. 4.12.4 FILTER With the filter settings you adjust the reading of quickly changing flows. The filter basically averages the readings from the sensor. More information can be found in chapter 2.19 Filter Settings. There are two separate filters that are adjustable and independent of each other. Dynamic and Averaging filter: Dynamic Filter: The dynamic filter will increase the number of readings that are averaged when the flow is less dynamic and decrease the number of readings that are averaged when the flow shows quick changes. So when the flow is quickly rising or falling it will take less averages in it calculations. On this way the unit will react faster to changes in the flow. Averaging Filter: The averaging filter is a “moving average filter”. It calculates the average value of a number of measurements and shows the average on the display. As you increase the filter setting from off to maximum, you increase the number of measurements the average is calculated from. ! Before you apply higher filter values, please try to identify the cause of the flow pulsations. This could be a compressor, pressure amplifiers, incorrectly sized fittings, non-return valves or pressure regulators. Sometimes creating more “dead volume” before of behind your flow meter could solve the problem. 4.12.5 RESOLUTION In this menu you can adjust the resolution of your flow and totalizer values shown on the display. The red-y compact 2 has the ability to show the actual flow and the totalizer in many different engineering units. This means that the number of digits in the readout can change a lot. In automatic resolution mode (menu option "Auto") the number of digits are computed depending on range and current selected unit. The minimum number of digits is 4, the maximum 6 (Excluding the decimal point). Below you find the table on how many digits will be visible in this auto mode. Range until from Example display values from until Display resolution 0.01 0.09 0.01 0.09999 0.00001 0.1 0.9 0.1 0.9999 0.0001 1 9 1 9.999 0.001 10 99 10 99.99 0.1 100 999 100 999.9 0.1 1000 9999 1 000 9 999 1 10 000 99 000 10 000 99 990 10 100 000 999 999 100 000 999 900 100 Notes: 1. Because the value is right-aligned, it is possible that depending on the actual flow you can see a change in the number of digits behind the decimal point. For example if the flow is changing from 2 to 2.01 and then 2.1 you can see: 2.0, 2.01 and 2.1 on the display. 2. If the maximum number of digits is exceeded you see out of range on the display. In that case select an ther unit (see chapter 4.12.3 Units). 3. The step size in auto mode between each reading is depending on the range but it is always well within the accuracy of the flow meter. For other setting mentioned below, this does not have to be the case. The other settings are the minimum step that the value will take between values. Example: If you have a flow of 189.673 mln/min than the unit will show 189.6 in auto mode. When selecting the other settings you would see: Resolution setting 0.0001 0.001 0.01 0.1 auto 1 10 100 1000 10 000 ! Flow Displayed Remarks 189.673 The display cannot show more than 6 digits 189.673 189.67 189.6 189 673 189.6 189 180 100 0.0 0.0 Note: The numbers are not rounded off, but they are made invisible (also called a floor function) The totalizer and the bar graph will not be effected by this setting and will also work based on the real high resolution flow. 4.12.6 SECURITY To avoid the unauthorized changing of settings in the menu, it is possible to protect the menu with a self-defined password. If you enable this option you first have to enter a 4-digit numeric password to gain access to the menus. In this setting you can also define that password. You can only activate the password after you have defined your own personal password under “Set password” 4.12.7 BATTERY AUTO OFF To extend the battery life to the maximum we recommend that you set this menu so that, when powered with a battery, the red-y compact 2 will switch off automatically after the indicated number of minutes. Please note that this menu has no effect if the unit is powered by USB or the external 24 Vdc. Once the unit is switched off it no longer totalizes the flow. Note: When we supply the unit, the “auto power off” will be set to 15 minutes 4.12.8 FACTORY RESET If you activate the factory reset, all variables will be reset to the factory default (for instance the password protection will be disabled). The continuous totalizer, however, keeps its value. Only the resettable totalizer gets reset to zero. The reset takes about 30 seconds. 5. MAINTENANCE When operated properly and with the use of clean and dry gas, red-y compact devices do not require any routine maintenance. There are no internal moving parts in the measurement part of the device. However, we recommend that the calibration is checked after 12 months. If your red-y compact is still within tolerance, this time interval can be extended. The timing of the periodic check is the customer's responsibility. 5.10 CLEANING TO REMOVE CONTAMINATION Depending on the type of contamination, on-site cleaning of the measuring or control device may be possible. As a first step, we recommend flushing with N2 or dry air. If it is contaminated with liquids (ex. oil), pure methanol alcohol (100%) can be used. After cleaning, rinse the red-y compact with the optional needle valve position fully open with dry air or nitrogen for approximately 15 minutes to dry out all liquids. ! Notes: • The warranty is null and void if the housing was removed.Only use the proper tools. • Be careful when handling the device and the individual components. • Make sure that the disassembly environment is clean. • Do not touch the circuit board or electronic components without first grounding yourself and the surroundings. Electrostatic discharges can destroy components. • After cleaning, you should have the device checked or, if necessary, recalibrated by your sales partner at the next opportunity. 5.11 RETURNS When returning a device please insure suitable packaging. Please contact us before you return the unit to us. To repair the unit we require a detailed and accurate description of the problem, the required service and the possible causes of the faults. Please contact our service department: [email protected] ! Note: If the device has come into contact with aggressive or toxic gases, please ensure that it is properly cleaned/flushed before returning the device to us. Please always complete the contamination declaration form. 6. APPENDIX 6.10 TROUBLESHOOTING In the following table we have compiled fault symptoms, their possible causes and suitable measures you can take. If you do not recognize your fault symptom, or the proposed measures were not successful, please consult your sales partner. If you are planning to return a product, please refer to the chapter 5.11 Returns. If you have to remove the measuring or control device from the pipeline, please observe any flushing procedures and the relevant safety guidelines. You will find a guide on how to remove and clean the devices in the chapter 'Operation and Maintenance'. Error Output indicates high flow continuously Possible causes Measures Flow is too high (Overflow) Reduce the flow rate. If necessary, the full scale can be extended. Please consult your sales partner. Device is heavily contaminated Please consult AirCom Pneumatic GmbH Sensor faulty Please consult AirCom Pneumatic GmbH Sensor contaminated Kontaktieren Sie AirCom Pneumatic GmbH The device is being operated with a diffe- For multi-gas instruments, you can set the appropriate rent gas from its calibration. gas type Flow is shown despite zero flow. The manual valve is leaking Meter does not indicate the expected value. Offset due to mounting position Particularly with small measurement ranges, heavy gases and gauge pressures > 5 bar, a zero-point offset can occur where the mounting position is vertical >> chimney effect. Where possible, mount the device horizontally Contaminated valvev Flush the valve repeatedly with clean dry nitrogen Leakage Flow rate > than reference: Leakage between measuring device and your reference Flow rate < than reference: Leakage upstream of the measuring instrument Contamination With contamination by sealing tape, for example, it is possible that the flow divider is partially blocked. In this case the device displays more than the reference. Please consult your sales partner The device is being operated with a diffe- Connect the intended gas, or change the type of gas rent gas than calibrated. in the 'Calibration' menu Different reference conditions Verify “Normal” or “Standard” conditions Inlet pressure is too low Check your inlet and outlet pressures Der Eingangsdruck ist zu tief Prüfen Sie die Druckverhältnisse Pressure drop too high Check for blockage or polution. Check fittings ID Battery empty Replace battery Menu settings incorrect Adjust the auto off menu’s Unit always enters service mode when switched on Die Firmware ist nicht korrekt Setzen Sie das Messgerät auf Werkseinstellung zurück. Out of Range Wrong unit selection Select a unit that fits better to the current flow. Forgot Password ? Please consult AirCom Pneumatic GmbH Totalizer shows 9999999 Overflow totalizer units Select a different unit (try m3n or kg) Disfunction alarm contacts An external magnet can unintentionally influence the alarm contacts Please remove the interfering magnet Unit, backlight or display unexpectedly switched off 6.11 DIMENSIONAL DRAWINGS ¼“ IN MM (Units with ¼” BSPP process connections) “P” referes to the optional fittings length. Fittings are options only. Standard process connection is female ¼” BSPP tread. 6.12 DIMENSIONAL DRAWINGS ¼“ IN INCHES (Units with ¼” BSPP process connections) “P” referes to the optional fittings length. Fittings are options only. Standard process connection is female ¼” BSPP tread. 6.13 DIMENSIONAL DRAWINGS ½“ IN MM (Units with ½” BSPP process connections) “P” referes to the optional fittings length. Fittings are options only. Standard process connection is female ½” BSPP tread. 6.14 DIMENSIONAL DRAWINGS ½“ IN INCHES (Units with ½” BSPP process connections) “P” referes to the optional fittings length. Fittings are options only. Standard process connection is female ½” BSPP tread. 6.15 WETTED PARTS RED-Y COMPACT 2 SERIES Gerät Body Grundkörper Gerät VGM / VGR 1.4404 (316L) or Aluminium Body: O-Rings Grundkörper: O-Ringe FKM (Standard), EPDM (option) Flow divider Strömungsteiler 1.4305 Control valve Regelventil 1.4305/1.4105/1.6908 Control valve: O-Rings Regelventil: O-Ringe FKM (Standard), EPDM (option) Sensor material Sensormaterialien Silicon, silicon oxide, silicon nitride Silizium, Siliziumoxid, Siliziumnitrit Epoxy Sensor packaging 1.4305 Abbreviation Kurzbezeichnung Bezeichnung Remarks EPDM Ethylene-propylene-diene-monomer rubber Ethylen-Propylen-Dien-Kautschuk Epoxy Adhesive for sensor fixation, protection for wire bonding Klebstoff für Sensorfixierung, Schutz für Bonddrähte FKM Fluor rubber Fluor-Kautschuk For units with EPDM O-rings it is possible to get a FDA compatible materials statement. Please contact AirCom Pneumatic GmbH. 6.16 OVERVIEW DEFAULT SETTINGS No. Group 1 Totalizer 2 Gas selection 3 Settings 4 5 Subgroup Settings Settings Name Home screen view Options Non- Resettable Resettable Gas 1 Gas 2 Gas 3 Default X X Measurement Auto Economy Performance X Display Home screens (multiple choice) Overview Flow Totalizer Alarm (A1) Alarm (A2) Alarm (A3) X X X Backlight 0% (Off) 20% 40% 60% 80% 100% (Max) Display X Remarks 1) 6 7 Settings Settings Display Display X Orientation Auto 0 degree 90 degree 180 degree 270 degree X Display auto off Disabled 1 minute 3 minutes 5 minutes 15 minutes 30 minutes X 8 Settings Display Light auto off Disabled 5 seconds 10 seconds 30 seconds 60 seconds 120 seconds 9 Settings Units Flow Custom 2) 10 Settings Units Totalizer Custom 2), 3) Dynamic filter Off Low Medium High Very high Maximum X Averaging filter Off Low Medium High Maximum X Flow Auto 1 0.1 0.01 0.001 0.0001 X Totalizer Auto 1 0.1 0.01 0.001 0.0001 Security Enable password Battery auto off Disabled 15 minutes 30 minutes 60 minutes 11 12 13 Settings Settings Settings 14 Settings 15 Settings 16 Settings Filter Filter Resolution Resolution X X 1) If ordered for air or N2 or O2 and the unit is calibrated with air and all have the same operating conditions, range and dynamics, all these 3 gasses will be programmed. The gas is set default on the customer ordered gas. 2) The reference condition of all units under “Real and Norm” are always 0⁰C and 1013.25 mbara. (Both for the totalizer and flow units). The reference conditions of all “Other Units” are always defined at the time of ordering. 3) If no units are specified for the totalizer, it is set it the same as the main unit without the time factor. For example: ln/ min becomes ln, kg/hr becomes kg, etc. The totalizer unit can be changed by the user anytime. See 4.11.2 Totalizer and 4.12.3 Units. 7. OVERVIEW MENU RED-Y COMPACT 2 ALARM MENU (ONLY VALID IF THE ALARM MODULE HAS BEEN INSTALL) AirCom Pneumatic GmbH Siemensstraße 18 P.O. Box 10 40 01 D-40885 Ratingen Telephone: +49 2102 73390 - 0 Fax: +49 2102 73390 - 10 E-Mail: [email protected] Website: www.aircom.net ">

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Key features
- Compact Design
- Touch Screen
- Multiple Power Options
- Temperature Compensation
- Flow Totalizer
- Filter Settings
- Alarm Module (Optional)
- Multiple Gas Compatibility
- Pressure Loss Control
Frequently asked questions
It can be used with Air, O2, N2, He, Ar, CO2, H2, CH4, C3H8 and other gases upon request, see specifications in the document.
Yes, the VGR-D4 can be powered with a standard AA battery or an external power supply (USB micro-B or 8-30 Vdc).
The calibration sheet that comes with the device lists the gas, range, pressure, and temperature for which it is calibrated. Contact the factory for any deviations.
The VGR-D4 is ready for use within seconds of connecting the power; there is no significant warm-up time.
Yes, it features a test pressure of 16 bars (232 psia) and a leak rate to external of 1 x 10-6 mbar*l/s He.