advertisement
Electromagnetic Flowmeter for Water Measurement
Model: MCB10A
User’s Manual
CM2-MCB100-2001
First issue: Apr. 2004, Rev. 1: Dec. 2004
Copyright, Notices and Trademarks
Printed in Japan - ©Copyright 2004 by Yamatake Corporation.
While this information is presented in good faith and believed to be accurate, Yamatake Corporation disclaims the implied warranties of merchantability and fitness for a particular purpose and makes no express warranties except as may be stated in its written agreement with and for its customer.
In no event is Yamatake Corporation liable to anyone for any indirect, special or consequential damages. This information and specifications in this document are subject to change without notice.
Copyright 2004 by Yamatake Corporation
All Rights Reserved
Preface
Thank you for purchasing our electromagnetic flowmeter. The model MCB is a flowmeter dedicated to water flow measurement and was developed applying the basic principle of electromagnetic flow measurement to be an inexpensive, easy-to-use instrument.
Model MCB10A i
ii
Preface
Unpacking, product checking and storage
Yamatake Corporation
Unpacking
This instrument is a precision instrument. When unpacking, handle it with care to prevent accidents or damage. Check that the following items are contained:
• MCB main unit, standard accessories and SETTING DATA sheet
Verifying the specifications
Specifications are written on the nameplate of the main unit. Referring to Specification sheet, check that these are consistent with your specifications. Check the following items, in particular:
(Main unit)
• Detector bore diameter
• Flange rating
Inquiries
If you have any questions regarding the specifications, contact the nearest Yamatake
Corporation office or Yamatake Corporation representative service offices. When making an inquiry, be sure to provide the MODEL NO. and PRODUCT NO.
Storage precautions
When storing this instrument before use, observe the following precautions:
• Store it indoors and at room temperature (25°C, 77°F) and humidity (65% RH), safely away from vibration or shock.
• Store it in its packed and shipped state.
When storing this instrument after use, follow these steps:
1. Rinse the inside of the detector with water to remove the adhering measured fluid and dry off the water.
2. Tighten the display cover and waterproof gland to keep out moisture.
3. Replace the device in its original packing.
4. Store it indoors at room temperature and humidity, safely away from vibration and shock.
Model MCB10A
Yamatake Corporation
Safety
Preface
About this manual
This manual contains information and warnings that must be observed to keep the model MCB10A electromagnetic flowmeter operating safely. Correct installation, correct operation and regular maintenance are essential to ensure safety while using this device.
For the correct and safe use of this electromagnetic flowmeter, it is essential that both operating and service personnel follow generally accepted safety procedures in addition to the safety precautions specified in this manual.
The following symbols are used in this manual to alert you to possible hazards:
WARNING
Denotes a potentially hazardous situation which, if not avoided, could result in death or serious injury.
CAUTION
Failure to observe these precautions may produce dangerous conditions that could result in operator injury or in physical damage to the device.
Safety message
Carefully read this section before installing or operating this device.
WARNING
ELECTRIC SHOCK HAZARD! Turn the power supply OFF before opening the converter cover.
WARNING
This detector is heavy. Dropping it could cause personal injury or damage to the device.
WARNING
Before removing the unit, make sure that there is no residual liquid or pressure inside the piping and the detector to avoid personal injury or damage to the unit.
Model MCB10A iii
Preface Yamatake Corporation
CAUTION
Switch the control equipment to manual control before terminating electromagnetic flowmeter operation and shutting off the output to the control equipment. This action prevents the power shut-off from directly affecting the control equipment.
CAUTION
Install the electromagnetic flowmeter in a location with an ambient temperature of 0 to 50°C (32 to 122°F) and an ambient humidity of 5 to 85% RH (no condensation) to prevent equipment malfunction or output errors.
CAUTION
Do not install the electromagnetic flowmeter near high-current power lines, motors or transformers to prevent damage from electromagnetic induction, which can cause equipment malfunction or output errors.
CAUTION
Do not install the electromagnetic flowmeter in a location subject to direct sunlight, wind, rain, severe vibration, or in a highly corrosive atmosphere. The converter and detector can be damaged. The electromagnetic flowmeter is for indoor use only.
CAUTION
Be sure to ground the welding power transformer when welding near the electromagnetic flowmeter to avoid output errors.
CAUTION
DO NOT use the electromagnetic flowmeter to ground a welder. It can damage the electromagnetic flowmeter.
CAUTION
The detector must be grounded (grounding resistance is < 100
Ω) to avoid output fluctuation, zero point instability or output drift.
iv Model MCB10A
Yamatake Corporation Preface
CAUTION
Measurable process fluids of the electromagnetic flowmeter are chilled water, water with glycol, water and hot water. No corrosive fluid and no abrasive fluid is applicable. Corrosive fluid and abrasive fluid can damage the electromagnetic flowmeter.
CAUTION
If the pipe is not filled, output errors will occur.
CAUTION
Do not rotate the unit more than 180° (one half rotation). Any further rotation can disconnect wiring.
After removing the screws, do not pull on the converter. You can break the lead wire.
When you move the converter, make sure the O-ring remains in the groove to insure an air-tight seal when the unit is reassembled.
CAUTION
Before installing the detector, make sure any foreign matter is flushed from the interior passage of the detector. Residual foreign matter could cause output fluctuations.
Do not touch the electrodes or allow oil or fat to come into contact with them to avoid output fluctuations.
Align the direction mark on the detector in the direction of the liquid flow.
Misalignment can result in a negative output.
CAUTION
The correct fastening torque must be used to prevent leakage. To avoid damage to the detector, do not exceed the listed fastening torque.
CAUTION
Before installing the detector, make sure that the pipe is exactly straight and centered. Any irregularity could cause leakage or other hazards.
Model MCB10A v
Preface Yamatake Corporation
CAUTION
Never attempt to force the detector between two flange if the space is too narrow. It can damage the detector.
CAUTION
Make certain the bore diameters of the pipe and the detector are exactly the same and install the detector so that the gasket does not protrude into the inner bore of the pipe, as this could result in leakage or other hazards.
CAUTION
Tighten each bolt a little at a time and apply uniform pressure to all the bolts. If leakage continues after tightening the bolts, make sure that the pipe is not off center, then continue to tighten each bolt a little at a time.
CAUTION
Using a gasket with too small a diameter can affect the flow velocity distribution, resulting in inaccurate measurement.
Using a gasket with too large a diameter can cause leakage. Also, any solid substance in the fluid to be measured could accumulate between the gasket and the flange, resulting in inaccurate measurement.
CAUTION
The use of rubber gaskets and a lower fastening torque is not recommended and can cause insufficient surface pressure between the lining and the grounding ring, resulting in leakage.
CAUTION
Insufficient grounding can cause output fluctuations, instability of the zero point, or output drift. Secure single point grounding with a grounding resistance of 100
Ω or less is recommended.
Do not ground a welder to the detector to avoid damaging the detector.
vi Model MCB10A
Table of Contents
Chapter 1: Configuration and structure of measuring system
1-2: Structure of this instrument and functions of its various parts............. 1-6
Chapter 2: Instrument installation
Components necessary for installation.................................................... 2-11
Selecting an installing method................................................................. 2-13
Installing method on a horizontal pipe..................................................... 2-14
Installing method on a vertical pipe ......................................................... 2-15
Installing method (1) on a metallic pipe ................................................... 2-17
Installing method (1) on a polyvinyl chloride pipe.................................... 2-18
Chapter 3: Electrical wiring
Chapter 4: Operation
Table of Contents
Chapter 5: Operation using the data setting device
5-1-1: Display and operation contents of data setting device .............................. 5-3
5-3: Description of MEASURING MODE........................................................... 5-7
5-4: Overview of operation using the data setting device.............................. 5-9
5-5: Configuration of OPERATOR'S MODE ..................................................... 5-10
5-5-1: Changing setting of damping time constant............................................... 5-12
5-5-7: Selecting flow rate to be displayed in the main display ............................. 5-19
5-5-8: Entering ENGINEERING MODE and MAINTENANCE MODE ................. 5-20
5-6: Configuration of ENGINEERING MODE.................................................... 5-22
5-6-5: Setting and changing compensation coefficient ........................................ 5-29
5-7: Configuration of MAINTENANCE MODE .................................................. 5-43
5-7-1: Configuration of OUTPUT CHECK MODE ................................................ 5-44
5-7-5: Configuration of CALIBRATION MODE..................................................... 5-48
Table of Contents
Chapter 6: Maintenance and troubleshooting
6-1: Maintenance and inspection of hardware ................................................ 6-2
List of Figures & Tables
<Figures & Photographs>
Figure 2-14:Grounding ring made of SUS material (protective fixture used).................... 2-19
Figure 2-15:Grounding ring made of SUS material (rubber gasket used).......................... 2-19
Figure 6-1: Replacement of indicator/data setter (with the cover removed) ..................... 6-2
<Tables>
Table 2-2: Recommended gasket internal diameter of full-face gaskets.......................... 2-12
Table 2-3: Internal and external diameter of rubber gaskets 0.5 to 1 mm thick............... 2-12
Table 2-4: Internal and external diameter of rubber gaskets 3 to 4 mm thick.................. 2-12
Chapter 1 : Configuration and structure of measuring system
Outline of this chapter
This chapter presents the equipment configuration of a measuring system using this instrument.
• It also describes the structure, the names and functions of various parts of the main unit.
Model MCB10A 1-1
Configuration and structure of measuring system
1-1 : Loop configuration
1-1-1 : Measuring system
Yamatake Corporation
Introduction
This instrument is an electromagnetic flowmeter and outputs analog and pulse or contact output. It measures the flow rate of a conductive fluid flowing in the sensor and outputs a signal according to the set range.
Concept of flow rate measurement by this instrument
The concept of a flow rate measuring system using this instrument is shown.
Output signal
Analog output
Pulse output
Contact output
1-2
Fluid
Figure 1-1 Conceptual drawing of measuring system (integral type)
Analog output
If instantaneous flow rate values are to be output as an analog variable to control equipment, configure the system to deliver an analog output.
Pulse output
As a pulse output, the open-collector output is available. Pulse frequencies up to 200
Hz can be delivered. The pulse output can be delivered simultaneously with an analog output.
Contact output
Instead of the pulse output, a contact output is available using the open-collector output. The contact output can be delivered simultaneously with an analog output.
Model MCB10A
Yamatake Corporation Configuration and structure of measuring system
1-1-2 : Loop configuration for analog output
An example of system configuration is shown. The instantaneous flow rate values measured by this instrument are delivered as a 4-20 mA DC analog signal.
In this loop configuration, the analog signal from the instrument can be delivered directly to a host control system.
4-20mA
Analog output
Host control system
Figure 1-2 Loop configuration for analog output
• Electromagnetic flowmeter (main unit): Measures flow rate and outputs instantaneous flow rate value as an analog signal.
When configuring a system using this instrument, it is necessary to determine the supply power voltage and load resistance to satisfy the operation conditions of this instrument.
For details, refer to Specification Sheet.
Model MCB10A 1-3
Configuration and structure of measuring system Yamatake Corporation
1-1-3 : Loop configuration for pulse output
An example of loop configuration is shown. Instantaneous flow rate values measured by this instrument are delivered as a pulse output with the specified pulse width and pulse weight.
In addition to an analog signal, this loop configuration allows the instrument to deliver a pulse output to an electronic counter, sequencer or other host control system or counter.
Electronic counter
(Capable of receiving open-collector output signal)
Figure 1-3 Loop configuration for pulse output
• Electromagnetic flowmeter (main unit): Measures flow rate and outputs a pulse output signal to an electronic counter. Displays the measured flow rate as a flow rate value.
• Electronic counter: Receives the pulse output as input and displays the totalized value. Batch or other types of control take place based on the totalized value on the electronic counter.
• Open collector: A pulse output method using a transistor contact.
1-4 Model MCB10A
Yamatake Corporation Configuration and structure of measuring system
1-1-4 : Loop configuration for contact output
An example of loop configuration is shown. If the instantaneous flow rate value measured by this instrument satisfies the upper and lower limit settings or a critical failure occurs in the instrument, that state is delivered as a contact output.
In addition to an analog signal, this loop configuration allows this instrument to deliver the contact output to a sequencer or other host control system.
Contact input equipment
(Capable of receiving open collector output signals)
Figure 1-4 Loop configuration for contact output
• Electromagnetic flowmeter (main unit): Measures flow rate and outputs an upper or lower limit alarm or critical failure as a contact output.
• Contact input equipment: Receives the contact output and displays the alarm and the like.
• Open collector: An output method using a transistor contact.
Model MCB10A 1-5
Configuration and structure of measuring system Yamatake Corporation
1-2 : Structure of this instrument and functions of its various parts
1-2-1 : Structure of main unit
Major components
This instrument consists of a detector and converter. The converter, in turn, consists of the converter proper, an indicator/data setter and a terminal box.
Indicator / data setter
Converter
1-6
Detector
Figure 1-5 General view of integral type
Names and description of various parts
The following table gives a description of the various parts.
Name Description
Detector • When a fluid passes through the inside, the sensor generates a signal of electromotive force that is proportional to the passing flow rate.
• Installs to the pipes and supports the entire instrument.
• The electrode mounting position is horizontal mounting for both electrodes.
Converter • Transforms the signal of electromotive force generated by the sensor into an instantaneous flow rate value and outputs a flow rate signal. Equipped inside with a Terminal block.
Indicator/data setter • Displays the instantaneous flow rate value and internal status of the instrument.
Model MCB10A
Yamatake Corporation
1-2-2 : Detector: Wafer type
Configuration and structure of measuring system
Description
The wafer type detector has a function and structure as follows:
• When a fluid passes through the inside, the detector generates a signal of electromotive force that is proportional to the passing flow rate.
• The electrode mounting position is for horizontal mounting for both electrodes.
Names of various parts
The structure and names of various parts of the sensor are shown.
Flow direction mark
Grounding ring
Setscrew
(4 places)
Figure 1-6 Detector details (wafer-type)
Names and functions of various parts
The following table describes the various parts of the detector.
Name Description
Flow direction mark • Indicates the flow direction of the fluid.
• Install the detector and ensure that the fluid flow conforms to the flow direction mark.
Grounding ring • Made of stainless steel
Model MCB10A 1-7
Configuration and structure of measuring system
1-2-3 : Indicator/data setter
Yamatake Corporation
Description
The indicator/data setter has the following function and structure.
• Displays the instantaneous flow rate value and internal conditions of the instrument.
• The indicator face can be turned at intervals of 90 degrees through one turn.
Names of various parts
The names of various parts of the indicator/data setter are shown.
Setscrew
Liquid crystal display
Photograph 1-1 Indicator/data setter details
1-8 Model MCB10A
Yamatake Corporation
1-2-4 : Terminal block
Configuration and structure of measuring system
Description
The terminal block contains output signal terminals. Open the transducer cover and you will find screwed miniature terminals on the left.
Names of various parts
The structure of the terminal block and the manes of its various parts are shown.
Connecting cable gland for output line conduit
Power terminal
Grounding terminal
Output signal terminal
Photograph 1-2 Indicator/data setter details
Model MCB10A 1-9
Configuration and structure of measuring system Yamatake Corporation
Names and description of various parts
The following table describes the various parts of the terminal box.
Name Description
Transducer cover
Output signal terminal
• Jet-proof structure (JIS C0920)
• I.OUT+, -: Analog current output terminals
• L: Power supply terminal. There are models for 24V DC and 100V AC. Check referring to the specification.
• PULSE/STATUS OUT+, -: Open-collector pulse output and contact output terminals
Grounding terminal • Make a single-point grounding (Class D) from the internal grounding terminal at a place as close to this instrument as possible.
• The grounding should be JIS Class D. If not grounded, malfunctions can result.
1-10
Connecting cable gland for output signal line conduit
Grounding resistance: less than 100
Ω
• Wire the signal line by entering it through this.
Model MCB10A
Chapter 2 : Instrument installation
Outline of this chapter
This chapter describes the installation and wiring of the instrument.
The necessary components and installing methods depend on the material of the grounding ring and the material of the installed piping.
The description proceeds in the following order:
• Criteria for selecting an installation environment
• Outline of installing method of the instrument
• Detailed installing methods by materials
Model MCB10A 2-1
Instrument installation
2-1 : Before installation
2-1-1 : Criteria (1) for selecting an installation location
Yamatake Corporation
Introduction
To bring out the performance of this instrument to the maximum, choose the optimum installation location according to the following criteria for selecting an installation location.
Cautions on surrounding environment
• Install at a place where the ambient temperature is in the range from -20 to +50°C
(-4°F to +122°F) and the ambient humidity is in the range from 10 to 85% RH.
Otherwise, instrument failure or output errors may result.
• Avoid a place close to a large-current cable, motor or transformer that may bring about inductive interference. Otherwise, instrument failure or output errors may result.
• Avoid a place where there are severe vibrations or a corrosive atmosphere.
Otherwise, a broken sensor neck or damaged instrument may result.
• Avoid a place exposed to direct sunlight. Otherwise, a broken plastic case may result.
Cautions on measured fluid
As to the measured fluid, install the instrument where it satisfies the following conditions. Otherwise, output errors or fluctuations may result.
• A place where the measured fluid has the necessary electric conductivity for measurement (the value depending on the transducer used in combination) and the conductivity distribution can be deemed almost even.
• A place where the measured fluid can be deemed electrochemically homogeneous.
If, for example, fluids are mixed in the upstream pipe, a place where the two fluids can be deemed to have mixed together homogeneously.
• If an ingredient is mixed in, a place where the ingredient distribution can be deemed homogeneous.
• For the following fluids, do not use this instrument even if their electric conductivity, temperature, pressure and the like are within the instrument specifications (see Appendix) because they can cause problems in measurement.
(1) Fluids which have a sufficient conductivity at high temperatures but do not satisfy the conductivity requirement at ordinary temperature (about 20°C (68°F)). (For example, fatty acids and soap)
(2) Some fluids with a surfactant mixed in (For example, rinse, shampoo and CWM)
(3) Insulating adhesive materials (For example, oil, kaolinite, kaolin, calcium stearate)
(4) Slurry fluids containing solid matter (For example, pulp slurry, mud slurry, cement slurry)
2-2 Model MCB10A
Yamatake Corporation
Cautions after installation
Instrument installation
CAUTION
(1) Avoid using this instrument as a foothold after installation because such a use may cause injury or damage to the equipment.
(2) Take care when using a hand tool. An impact from the tool may cause a broken case, resulting in injury.
WARNING
(1) When removing this instrument, do removal work after ascertaining that there is no residual liquid or pressure in the pipe or inside the sensor. Otherwise, you may be injured.
• The output signal or indication may fluctuate depending on pulsation or other conditions of the fluid. In such cases, increase the damping time constant or take some other measure.
Model MCB10A 2-3
Instrument installation
2-1-2 : Criteria (2) for selecting an installation location
Yamatake Corporation
Installed position
• Install the instrument at a place where the measured fluid always fills inside the sensor. An example of installation is shown in the figure below to illustrate this condition.
~Note
The fluid may not fill completely
Air may be entrapped
Good
The fluid may not fill completely
Pump
Good
Figure 2-1 Example of installation
•
•
•
Install the instrument under the conditions circled in the figure above with the detector full of fluid. If the sensor is not filled in full, output errors may result. If empty, output fluctuations may result.
If the measured fluid is highly viscous, we recommend installing the instrument on a vertical pipe and flowing the fluid to ensure an axially symmetrical flow.
Lay on a straight pipe section upstream and downstream of the installation location. For the straight section length, see the figure below
.
90 bend
Detector
Tee
5D or over
Detector
Gate valve fully open
5D or over
Detector
Upstream
Diverging pipe section with a cone angle of
15 or over
Detector
(Less than 15 can be deemed
10D or over to be a straight section)
Converging pipe section
(can be deemed to be a straight section)
5D or over
Detector
Valve of various types
Detector
Pump of various types
P
10D or over
5D or over
10D or over
Figure 2-2 Straight pipe section upstream of detector
(D: Nominal detector bore diameter)
2-4 Model MCB10A
Yamatake Corporation Instrument installation
• No straight pipe section is basically needed on the downstream side. However, ensure 2D or over if influences of drift are thought possible.
• Choose a place where there are little pulsations in the flow (install at a place sufficiently distant from a pump or the like).
• Ensure the necessary space for inspecting the terminal box.
400 mm
400 mm
Figure 2-3 Necessary space for inspection
Model MCB10A 2-5
Instrument installation
2-1-3 : Direction of indicator/data setter
Yamatake Corporation
Changing the indicator/data setter direction
The indicator/data setter can be changed to a horizontal or vertical direction.
Step
1
2
3
Procedure
Power off the converter. For the power-off, use the circuit breaker or the like.
The converter front cover is fixed by hexagon socket head setscrews (M3).
Loosen the setscrews with an Allen wrench (1.5).
Remove the converter front cover by turning it counterclockwise with the dedicated tool.
4
5
6
7
~Note
Remove the front cover straight toward you with care.
The indicator/data setter is fixed by three screws. Remove these screws.
~Note
The screws are not captive to the indicator/data setter, so take care not to drop them.
Remove the indicator/data setter.
~Note
A cable is attached to the rear of the indicator/data setter. This cable is connected to the connector of the converter proper.
Turn the indicator/data setter to the desired direction and align it to the threaded holes in the converter proper.
Fix the indicator/data setter again using the three screws.
8
~Note
When tightening the screws, take care not to entangle and squeeze the cable.
Attach the front cover.
~Note
Take care not to injure your fingers on the cover edge or the thread in the case.
2-6
Figure 2-4 Changing the indicator/data setter direction
Model MCB10A
Yamatake Corporation
2-1-4 : Direction of the converter
Instrument installation
Introduction
In some locations, the direction of the converter may be unsuitable if the detector is installed as it is shipped. In such a case, the converter can be repositioned.
After selecting an installation site, adjust the direction of the converter in advance by the method shown below.
Repositioning the converter
The converter can be repositioned at right angles. Follow the procedure below.
Step Procedure
1 Using an M5 hex wrench, remove the four screws securing the converter.
2 Holding the detector, rotate the converter horizontally to the desired position.
CAUTION
Do not rotate the unit more than 180° (one half rotation). Any greater rotation can break wiring parts.
If the converter is removed, make sure that the O-ring, which provides an air-tight seal, is still fitted into the O-ring groove.
3 Using a hex wrench, re-tighten the four screws to secure the converter.
Hex wrench
Figure 2-5 Repositioning the converter
Model MCB10A
CAUTION
After removing the screws, do not pull hard on the converter. Otherwise, the lead wire inside can break.
2-7
Instrument installation
2-2 : Installation method
2-2-1 : Installation of wafer-type detector
Yamatake Corporation
Basic installing method
Introduction
This instrument is capable of wafer-type mounting. Install it correctly referring to the appropriate installing method.
Example of installing the wafer-type detector
The basic installing method of the wafer-type detector is shown.
Nut (option)
Through bolt (option)
Pipe
Centering fixture (Accessories)
Gasket
(Provide a gasket if the grounding ring is made of SUS material.
For other material, a gasket comes with it)
Figure 2-6 Example of installation
CAUTION
This instrument is heavy. Dropping it on your foot may cause injury or bone fracture. Take due care.
2-8 Model MCB10A
Yamatake Corporation
Tightening torque
Instrument installation
CAUTION
Table 2-1 shows the tightening torques by bore diameters. To prevent leakage from the pipe, use the centering fixtures and fix with the prescribed tightening torque. A leakage would bring about the danger of injury.
Table 2-1 Tightening torque
Nominal bore diameter of sensor
15 mm
25 mm
40 mm, 50 mm, 65 mm, 80 mm
100 mm
Tightening torque
13 - 18 N•m (130 - 180 kgf•cm)*
20 - 30 N•m (200 - 300 kgf•cm)*
30 - 50 N•m (300 - 500 kgf•cm)*
50 - 70 N•m (500 - 700 kgf•cm)*
*: Values in parentheses are for information only.
Flange shape
Referring to Figure 2-7, use a flange that gives a large area of contact with the gasket.
Good example
Flange
Weld
Weld
Bad example
(Because the area of contact with the gaskets is small, there is a risk of leakage)
~Note
Pipe
•
•
•
Figure 2-7 Flange shape
Prior to installing the detector, always do flushing (washing of pipe) to remove foreign matter inside the pipe. Otherwise, output fluctuations may result.
Do not touch the electrodes with your hand, an oily rag or the like. Otherwise, output fluctuations may result.
Make the flow direction mark of the detector agree with the direction of the fluid flow. In case of disagreement, no output will be delivered.
Model MCB10A 2-9
Instrument installation Yamatake Corporation
CAUTION
Install after confirming that there is no inclination or eccentricity of the pipe.
Otherwise, leakage or the like may result and the danger of injury may be brought about.
~Note
Inclined pipe Eccentric
Figure 2-8 Example (1) of incorrect installation
Do not insert between flanges that are too close together by force.
Otherwise, the instrument may be broken.
2-10
Figure 2-9 Example (2) of incorrect installation
CAUTION
When installing, align the bores of the detector and pipe so that the gasket does not stick out inside the pipe. Otherwise, a leakage may result and the danger of injury may be brought about.
~Note
When tightening the bolts, proceed with the tightening work so that the bolt tightness increases evenly over the bolts. If fluid leakage does not stop after tightening, check for misalignment and gradually increase the tightening bolt. When installing, take care that the tightening bolt is within the prescribed limit. Otherwise, damaged equipment may result.
Model MCB10A
Yamatake Corporation
Components necessary for installation
Instrument installation
Introduction
For installing the sensor, the following components are required:
• Centering nuts (4 pieces)
• Through bolts and nuts (optional)
• Gasket: Provide yourself.
• Protective plate: May be needed when installing the sensor on PVC pipe.
Centering fixtures
When installing, use the centering fixtures to prevent misalignment between the pipe and sensor.
Pass bolts through the centering fixtures so that the detector rests on or in-between the fixtures.
The attaching position of the fixtures used depends on the mounting direction of the detector.
For the attaching position, see the following figures.
Flange
Centering nuts
Figure 2-10 Horizontal mounting
(Attach two pieces to each of the right and left flanges.)
Flange
Centering nuts
Figure 2-11 Vertical mounting
(Attach 4 pieces to the lower flange.)
Model MCB10A 2-11
Instrument installation Yamatake Corporation
Gasket
The recommended gasket materials are joint sheet and PTFE. For the gasket internal
diameter, follow Table 2-2. We do not recommend rubber materials, but if you use
them, follow the following precautions:
~Note •
•
Too small a gasket internal diameter may disturb the velocity distribution and have an adverse effect on the accuracy.
Too large a gasket internal diameter may bring about fluid leakage. In the case where solid materials are contained in the measured fluid, accumulations of the solid materials may cause between a gasket and a flange and have an adverse effect on the accuracy.
Table 2-2 Recommended gasket internal diameter of full-face gaskets
(Unit: mm)
Bore diameter
Size
15 mm
(1/2 inch)
25 mm
(1 inch)
40 mm
(1½ inch)
50 mm
(2 inches)
65 mm
(2½ inches)
80 mm
(3 inches)
100 mm
(4 inches)
Internal diameter
16.5
±1
25.5
±1
40.5
±1
52
±1
65
±1
79
±1
104
±1
If you use rubber gaskets and install with a small tightening torque, provide rubber
gaskets with the inner and external diameters shown in Table 2-3.
For some grounding ring materials, two rubber gaskets of different thickness are
required. (See Figure 2-15 on page 2-19.)
Table 2-3 Internal and external diameter of rubber gaskets 0.5 to 1 mm thick (Unit: mm)
Bore diameter
Size
15 mm
(1/2 inch)
25 mm
(1 inch)
40 mm
(1½ inch)
50 mm
(2 inches)
65 mm
(2½ inches)
80 mm
(3 inches)
100 mm
(4 inches)
Internal diameter
External diameter
16.5
±1
34
±1
25.5
±1
50
±1
40.5
±1
75
±1
52
±1
91
±1
65
±1
111
±1
79
±1
121
±1
104
±1
146
±1
Table 2-4 Internal and external diameter of rubber gaskets 3 to 4 mm thick (Unit: mm)
Bore diameter
Size
15 mm
(1/2 inch)
25 mm
(1 inch)
40 mm
(1½ inch)
50 mm
(2 inches)
65 mm
(2½ inches)
80 mm
(3 inches)
100 mm
(4 inches)
Internal diameter
External diameter
16.5
±1
34
±1
25.5
±1
50
±1
40.5
±1
68
±1
52
±1
84
±1
65
±1
104
±1
79
±1
114
±1
104
±1
139
±1
2-12 Model MCB10A
Yamatake Corporation
Selecting an installing method
Instrument installation
CAUTION
The necessary components and installing method depend on piping material. On confirmation of the specifications and installation conditions of the sensor to be installed, choose the appropriate installing method. A wrong installation may bring about leakage of the measured fluid or damage to the pipe flanges, resulting in injury.
Selecting an installing method by material
Choose the appropriate installing method according to the following table.
Material of pipe on which to install Material of grounding ring Page to refer to
Metal
PVC
SUS material
SUS material
Model MCB10A 2-13
Instrument installation
Installing method on a horizontal pipe
Yamatake Corporation
CAUTION
An incorrect installation may bring about leakage of the measured fluid or damage to the pipe flanges, resulting in injury.
Necessary components
Provide the following components:
• Through bolts and nuts
• Centering fixtures
• Gaskets: Different pieces required depending on the material of the pipe on which to
install the sensor. See the installing methods by pipe material on pages 2-17 to 2-18.
Procedure
Follow the following:
Step
1
Description
Pass bolts through the flange holes represented by black circles in the figure. In this occasion, put two centering fixtures on each bolt.
Figure
Flange
2-14
2 • Make the flow direction mark on the instrument agree with the fluid flow direction.
• Insert the detector together with gaskets between the flanges.
• See that the detector rests on the centering fixtures.
Gasket
Fluid flow direction
3 • Check for misalignment.
• Check the gaskets for flushness.
• On completion of these checks, pass the remaining bolts through the flange holes and tighten all bolts evenly with the tightening
Model MCB10A
Yamatake Corporation
Installing method on a vertical pipe
Instrument installation
CAUTION
A wrong installation may bring about leakage of the measured fluid and damage to the pipe flanges, resulting in injury.
Necessary components
Provide the following components.
• Through bolts and nuts
• Centering fixtures
• Gaskets: Different pieces required depending on the material of the pipe on which
to install the sensor. Refer to the installing methods by pipe material on pages 2-17
Procedure
Follow the following:
Step
1
Description
The flange holes are represented by black circles. Pass bolts through the
2 rear holes and lightly fix them with nuts. In this occasion, put one centering fixture on each bolt.
Figure
Centering fixture
Rear side
Terminal box side
Flange
2 • Make the flow direction of the instrument agree with the fluid flow direction mark.
• Insert the sensor together with gaskets between the flanges.
Fluid flow direction
Gasket
Model MCB10A 2-15
Instrument installation
Step
3
Description
Pass bolts through the remaining two flange holes represented by black circles in Steps 1 and 2, with a centering fixture put on, and lightly fix them.
Yamatake Corporation
Figure
4 • Check for misalignment.
• Check the gaskets for flushness.
• On completion of these checks, pass the remaining bolts through the other flange holes and tighten all the bolts evenly with the tight-
2-16 Model MCB10A
Yamatake Corporation
Installing method (1) on a metallic pipe
Instrument installation
Introduction
The installing method shown on this page is applicable to the following combination of pipe and grounding ring materials. For installing methods applicable to other
combinations, refer to the table on page 2-13.
Pipe: Metal
Grounding ring: SUS material
Necessary components
Provide the following components:
• Through bolts and nuts
• Centering fixtures
• Gaskets: The recommended gaskets are gasket made of PTFE or rubber.
Recommended gasket internal diameter: Refer to Table 2-2 on page 2-12.
Installing
• Install as shown below.
For the tightening torque, follow Table 2-1 on page 2-9 irrespective of gasket material.
For the gasket internal diameter, follow Table 2-2 on page 2-12.
CAUTION
When rubber gaskets are used, the tightening torque must be small. However, this may give rise to an insufficient surface pressure between the lining and grounding ring, resulting in fluid leakage and injury.
Pipe side flange
Lining
Gasket
Grounding ring
Figure 2-12 Grounding ring of SUS material
Model MCB10A 2-17
Instrument installation Yamatake Corporation
Installing method (1) on a polyvinyl chloride pipe
Introduction
The installing method shown on this page is applicable to the following combination of pipe and grounding ring materials. For installing methods applicable to other
combinations, refer to the table on page 2-13.
Pipe: Polyvinyl chloride (PVC)
Grounding ring: SUS material
Necessary components
• Provide the following components:
• Through bolts and nuts
• Centering fixtures
• Gaskets: The recommended gaskets are gaskets made of PTFE or rubber.
Recommended gasket internal diameter: Refer to Table 2-2 on page 2-12.
If rubber gaskets are used, additional gaskets are required. The gaskets should be 0.5 to 1 mm thick and of the same material as the provided rubber gaskets.
For the dimensions, refer to Table 2-3 on page 2-12.
• Protective fixtures:Needed if installing with the prescribed tightening torque gives rise to a threat of deformation of, or damage to, the PVC pipe. Use stainless steel or other metallic material 6 mm thick or more that will not deform when
the nut is tightened. For the fixture shape, see Figure 2-14.
Installing method
The installing method depends on the amplitude of the tightening torque, existence or nonexistence of protective fixtures and other conditions. Install according to the applicable conditions.
1. Installing with the prescribed tightening torque
Install as shown below.
For the tightening torque, follow Table 2-1 on page 2-9 irrespective of the gasket
material. The gasket internal diameter should conform to Table 2-2 on page 2-12.
CAUTION
When rubber gaskets are used, the tightening torque must be small. However, this may give rise to an insufficient surface pressure between the lining and grounding ring, resulting in fluid leakage and injury.
2-18
Lining
Gasket
Grounding ring
Figure 2-13 Grounding ring made of SUS material
Model MCB10A
Yamatake Corporation Instrument installation
2. In the case where installing with the prescribed tightening torque gives rise to a threat of deformation of, or damage to, the PVC pipe (protective fixture used)
Provide a protective fixture that can be attached to the outside of the PVC flange and will not deform or damage the pipe when the prescribed tightening torque is applied. Attach the protective fixture to the PVC flange and install the detector as
shown below. The tightening torque should conform to Table 2-1 on page 2-9
irrespective of the gasket material.
Protective fixture
Lining
Gasket
Grounding ring
Figure 2-14 Grounding ring made of SUS material (protective fixture used)
3. In the case of installing with a small tightening torque (rubber gasket used)
Remove the grounding rings from the sensor and insert a rubber gasket 0.5 to 1 mm thick between the lining and grounding ring. Then, fix the grounding ring again.
In this condition, install the sensor to the pipe using the provided rubber gaskets (3 to 4 mm thick). The tightening torque to be applied is the torque necessary for the liquid seal of the rubber gasket. In this case, use the two kinds of gaskets of the same material.
Model MCB10A
Lining
Rubber gasket
(0.5 to 1 mm)
Rubber gasket
(3 to 4 mm)
Grounding ring
Figure 2-15 Grounding ring made of SUS material (rubber gasket used)
2-19
Instrument installation Yamatake Corporation
2-20 Model MCB10A
Chapter 3 : Electrical wiring
Outline of this chapter
This chapter describes the electrical wiring of the main unit.
Model MCB10A 3-1
Electrical wiring
3-1 : Electrical wiring
3-1-1 : Electrical wiring
Yamatake Corporation
Introduction
For this instrument to run, 24V DC or 100V AC power wiring is required. The electrical wiring of this instrument is described below as to the following items:
• Wiring cable connecting positions
• Power source and load resistance
• Cable selection and laying
• Grounding
• Wire connection of power source and analog current output
• Wire connection for pulse output
• Wire connection for contact output
• Wiring procedure
~Note
Do not connect commercial power directly to this instrument.
Impressing commercial power on this instrument causes unrecoverable damage to the internal measuring circuit.
Power and load resistance
Use power of 24V DC ±10% or 100V AC according to the specification.
The ripple of the supply power should be 1V or less in peak-to-peak value.
The wire to connect to the loop should have a load resistance of 400
Ω or less.
For a sequencer or other applications that do fast analog/digital conversion of 4-20 mA, insert the following additional network in parallel with the load resistance:
Load resistance
250 Ω
100k
Ω
1µF
Receiving instrument
Wiring cable laying
When laying a cable between the instrument and a controller, pay attention to the following:
• The wiring should avoid a large-capacity transformer, motor, power source or other noise source. Do not put the cable in the same tray or duct together with other power cables.
• For waterproofing and wire covering damage prevention, we recommend wiring work using conduits and ducts.
3-2 Model MCB10A
Yamatake Corporation Electrical wiring
Grounding
Grounding should be from the terminal E. Grounding resistance should be less than
100
Ω . For the purpose of grounding, make sure to use 3 core cable for power supply cable.
Grounding resistance should be less than 100
Ω.
Figure 3-1 Grounding
Wiring precautions
CAUTION
Incorrect wiring polarity can do damage to the equipment. Reconfirm the wiring position.
Model MCB10A
Wire connection of power supply and analog current output
Wire connection
Power supply
Power grounding
Analog output
Pulse output
Terminal
+/L
-/N
E
Iout+
Iout-
Pout+
Pout-
Applicable conductor diameter
AWG14-22
AWG14-22
AWG16-26
AWG16-27
AWG16-28
AWG16-29
Applicable cable diameter
6-12 mm 3-core CVV cable
2.0 mm
2
6-12 mm 3-core CVV cable
2.0 mm
2
6-12 mm 2-core KEVS cable
6-12 mm
Recommended cable
2-core KEVS cable
3-3
Electrical wiring
Wire connection for pulse output
The pulse output is an open-collector output.
Do wiring work paying attention to the voltage and polarity.
Yamatake Corporation
100mA max.
Protective diode
PULSE OUT +
Load
+
PULSE OUT -
+ -
Avoid this polarity
External power source
30V DC max.
Figure 3-2 Pulse output wire connection diagram
Wire connection for contact output
Because of the open-collector output, do wiring work paying attention to the voltage and polarity.
100mA max.
Protective diode
STATUS OUT +
Load
+
STATUS OUT -
+ -
Avoid this polarity
External power source
30V DC max.
Figure 3-3 Contact output wire connection diagram
3-4 Model MCB10A
Chapter 4 : Operation
Outline of this chapter
This chapter describes the procedure for start-up of the instrument and making zero adjustment.
It also describes termination of the measuring system.
When starting up and operating the instrument for the first time, carefully follow the descriptions in this section.
Model MCB10A 4-1
Operation
4-1 : Confirmation before start-up
Yamatake Corporation
Introduction
Before you start to operate the system, confirm the following. Numbers in parentheses indicate the section to which to refer.
(1) Confirm that the electromagnetic flowmeter is installed correctly to the pipe
(Chapter 2 : Instrument installation).
(2) Confirm that the electrical wiring is correct (Chapter 3 : Electrical wiring).
(3) Fill the electromagnetic flowmeter detector with a fluid and make zero adjustment
in a static state (Chapter 5 : Operation using the data setting device).
(4) Confirm that there is no leakage at the joint of the electromagnetic flowmeter
detector (Chapter 2 : Instrument installation).
(5) Confirm that the electromagnetic flowmeter detector is filled with water and there are no stagnant bubbles in it.
(6) Turn on power and warm up for 30 minutes.
(7) Confirm whether the settings are in accordance with the data sheet inserted in the transducer. If there is a need to change settings to meet your usage, change them by the data setter or the like.
~Note •
•
If the detector is not filled with water or many bubbles have adhered inside, the flow rate indication may not reach zero. In such cases, force the water to flow once at the intended flow rate to ensure that the sensor is free of bubbles and filled with water.
With incorrect grounding, the indication of flow rate may fluctuate largely. In such cases, check the grounding condition.
4-2 : Stopping
~Note
When stopping the instrument from operation and shutting down the output to control equipment, always change over the control equipment to manual control. This operation is for preventing the shutdown of instrument output from exerting a direct influence on the control equipment.
Procedure
When stopping the instrument, follow the following procedure:
Step
1
2
Procedure
Change over the control equipment of this instrument to be stopped to manual control.
Turn off the power.
4-2 Model MCB10A
Chapter 5 : Operation using the data setting device
This section describes how to operate this system from the data setting device. This system configuration and settings can be made using the four keys on the data setting device.
Model MCB10A 5-1
Operation using the data setting device
5-1 : Startup
Yamatake Corporation
Introduction
With the model MCB10A, all settings can be configured from the data setting unit.
Startup
When the power supply is turned on, the display changes in the order of OVERALL
DISPLAY, SELF CHECK MODE, and MEASURING MODE.
OVERALL DISPLAY
SELF CHECK MODE
;
Main display 7-segment, 8-digit blinks
The line mark ( ) moves from left to right.
Sub display: SELF CHECK MODE
Displayed for 5 seconds
;
MEASURING MODE
10 0.0
7 . 0 6 9 m3/h
8 8 8 8 8 8 8 8
%
5-2 Model MCB10A
Yamatake Corporation Operation using the data setting device
5-1-1 : Display and operation contents of data setting device
Overview of mode
This system provides the following four modes available in accordance with the operations:
Mode
MEASURING MODE
OPERATOR’S MODE
Description
Mode that shows measuring status.
Mode that is set for the operator. This mode is comprised of setting and configuration of data that are set or changed frequently during startup.
[Damping constant, auto zero adjustment, counter reset, counter preset value, etc.]
CAUTION
Set or changed data are temporarily written into the memory. Note that if the configured data are not saved/written into the memory within 10 minutes, the configured data returns to the previous values.
Be sure to press the MODE key to return to the
MEASURING MODE and to save data.
ENGINEERING MODE In the set mode for engineering, the mode is comprised of data that is set or changed less frequently than the data in
“OPERATOR'S MODE.”
[ID, function selection, detector data, flow rate range, hysteresis width, pulse data, low flow cut, selecting false mode for output, etc.]
CAUTION
• When the mode is changed to MEASURING
MODE by pressing the MODE key, the set/ changed data are saved into a non-volatile memory. Be sure to press the MODE key to save the configured data.
• Set or changed data are temporarily written into the memory. Note that if the configured data are not saved/written into the memory within 10 minutes, the configured data returns to the previous values. Be sure to press the MODE key to return to the MEASURING MODE and to save data.
Model MCB10A 5-3
Operation using the data setting device Yamatake Corporation
Mode Description
MAINTENANCE MODE A mode for maintenance that is used when adjustments and checks are needed for regular maintenance and when troubles occur.
[Loop check, output adjustment, gain adjustment, etc.]
This mode is furthermore divided into the following three types:
OUTPUT CHECK MODE
CALIBRATION MODE
CRITICAL MODE
CAUTION
• CALIBRATION MODE and CRITICAL
MODE contains very important adjustment values or operations for the flow rate measurement. Wrong settings make accurate flow rate measurement impossible. For the operation, contact our service engineers.
CAUTION
• When the mode is changed to MEASURING
MODE by pressing the MODE key, the set/ changed data are saved into a non-volatile memory. Be sure to press the MODE key to save the configured data.
• Set or changed data are temporarily written into the memory. Note that if the configured data are not saved/written into the memory within 10 minutes, the configured data returns to the previous values. Be sure to press the MODE key to return to the MEASURING MODE and to save data.
5-4 Model MCB10A
Yamatake Corporation Operation using the data setting device
5-2 : Functions of the data setting device
5-2-1 : Data setting device
Name of parts
7-segment 8-digit display
Main display
Sub display
Totalization display mark
% flow rate display mark
Actual flow rate display mark
Model MCB10A
Mode key
Right shift key
Increment key
Decrement key
Names and Descriptions of Parts
This section describes displays shown on the data setting device.
• Flow rate display
The flow rate display is given at three stages: % flow rate, actual flow rate and totalized value. Operating the key, the main display to be shown at the top stage can be set selecting from the actual flow rate, % flow rate and totalized value.
RATE appears for the actual flow rate display, % for the % flow rate display, and
TOTAL for the totalized value display (see “5-3-1 : Display overview”.).
Area
Main display
7-segment 8-digit display
% flow rate display mark
(%)
Actual flow rate display mark (RATE)
Totalized value display mark (TOTAL)
Sub display
Description
Displays the flow rate display selected for the main display by DISP SELECT in OPERATOR'S MODE.
Displays when % flow rate is shown for the main display.
Displays when the actual flow rate is shown for the main display.
Displays when the totalized value is shown for the main display.
• In MEASURING MODE, shows a flow rate display other than a flow rate display selected for the main display by DISP SELECT in OPERATOR'S
MODE.
• In modes other than MEASURING MODE, indicate procedures for setting and adjusting parameters.
5-5
Operation using the data setting device Yamatake Corporation
This section describes keys on the data setting device.
Name
MODE key
Right shift key
Decrement key
Description
• Enters OPERATOR'S MODE.
• When parameters and configured data have been changed in ENGINEERING MODE or
MAINTENANCE MODE, press this key to save the data.
• Moves the cursor to the right.
• Changes the parameter at a cursor position.
• Displays the previous screen.
* OPERATOR'S
Cursor
MODE
If the key is pressed, when the cursor is placed at the upper left end (*, #, >), the screen will change.
* DAMPING
Cursor
001.0 S
If the key is pressed, when the cursor is placed at a number, the number is decremented.
Increment key
# 1.0000 m/s
SPAN 07. 069 m
3
/h
Cursor
If the cursor is placed at a decimal point, the decimal point moves rightward.
• Changes the parameter at a cursor position.
• Displays the following screen.
* OPERATOR'S
Cursor
MODE
If the key is pressed, when the cursor is placed at the upper left end (*, #, >), the screen will change.
* DAMPING
Cursor
001.0 S
If the key is pressed, when the cursor is placed at a number, the number is incremented.
# 1.0000 m/s
SPAN 07. 069 m
3
/h
Cursor
If the key is pressed, when the cursor is placed at a decimal point, the decimal point moves to the left.
* AUTO ZERO
READY
Cursor
If the cursor is placed over
READY, pressing the key starts operation.
5-6 Model MCB10A
Yamatake Corporation Operation using the data setting device
5-3 : Description of MEASURING MODE
5-3-1 : Display overview
% flow rate display
10 0.0
7 . 0 6 9 m3/h
8 8 8 8 8 8 8 8
%
Actual flow rate display
7.06 9
1 0 0 . 0 m3/h
8 8 8 8 8 8 8 8
%
RATE
Totalizer display
1 2 3 4 5 6 7 8
7 . 0 6 9 m3/h
1 0 0 . 0 %
TOTAL
1st line (Main display): 7-segment 4-digit display
% flow rate (%)
2nd line: Actual flow rate display (Significant value of 5 digits)
3rd line: Totalized value display (Significant figure of 8 digits)
1st line (Main display): 7-segment 4-digit display
Actual flow rate (RATE)
2nd line: % flow rate display (Significant figure of 4 digits), unit of actual flow rate
3rd line: Totalized value display (Significant figure of 8 digits)
1st line (Main display): 7-segment 8-digit display
Totalized value (TOTAL)
2nd line: Actual flow rate display (Significant figure of 4 digits)
3rd line: % flow rate display (Significant figure of 4 digits)
Totalization is not performed, when the output selection is set to the contact output.
However, the previous value is displayed as the totalized value.
* Details on display
% flow rate display: The % flow rate display range is from -115.0% to 115.0%.
A value up to the first decimal place is displayed. The position of the decimal point is fixed.
The integer part to be displayed has up to three digits (0 to
115).
In the main display, unnecessary zeros are deleted (but are not deleted in the sub display).
Example) 019.8% J 19.8%
-000.5% J -0.5%
The position of the negative sign (-) is fixed. (The positive sign is not displayed.)
Actual flow rate display: The flow rate displayed in the actual flow rate display is up to 115% of the range or the equivalent.
However, if the flow rate equivalent to 115% of the range exceeds the range of significant figure, the highest value
(e.g., 9.999) will be displayed.
Model MCB10A 5-7
Operation using the data setting device Yamatake Corporation
In the main display, unnecessary zeros are deleted (but are not deleted in the sub display).
Totalized value display: An totalized value is displayed in 8 digits without signs and decimal points.
In the main display, unnecessary zeros are deleted (but are not deleted in the sub display).
Next to 99999999, totalization starts from 00000000.
5-8 Model MCB10A
Yamatake Corporation Operation using the data setting device
5-4 : Overview of operation using the data setting device
Introduction
The data setting device has three types of modes: OPERATOR'S MODE,
ENGINEERING MODE, and MAINTENANCE MODE. MAINTENANCE MODE is furthermore divided into three of sub-modes: OUTPUT, CALIBRATION, and
CRITICAL. The screen flow is as follows:
Entire display flow 1
100
*1 Displayed only when PULSE is selected by FUNC SET in ENGINEERING
MODE.
*2 Displayed only when STOUT is selected by FUNC SET in ENGINEERING
MODE.
Model MCB10A 5-9
Operation using the data setting device Yamatake Corporation
5-5 : Configuration of OPERATOR'S MODE
Introduction
OPERATOR'S MODE provides the following setting and adjustment items.
Item
DAMPING constant.
Contents
Sets a damping time
Screen
* DAMPING
20.0 %
005.0 s
AUTO ZERO Auto zero adjustment
* AUTO ZERO
20.0 %
READY
CNT-RESET VALUE Sets a built-in counter reset value.
20.0 %
* CNT-RESET VALUE
0 0 0 4 4 4 4
CNT-RESET READY Resets totalized value to a built-in counter reset value.
20.0 %
* CNT-RESET READY
0 0 0 0 0 0 0 0
SPIKE CUT Sets auto spike cut.
* SPIKE CUT
20.0 %
OFF
AVERAGING Sets a moving average function.
* AVERAGING
20.0 %
OFF
DISP SELECT
MODE ENTER
ENGINEERING
Selects either % flow rate, actual flow rate or totalized value to be displayed in the main display.
Enters the
ENGINEERING MODE.
20.0 %
* DISP SELECT
%
20.0 %
* MODE ENTER
ENGINEERING
MODE ENTER
MAINTENANCE
Enters the
MAINTENANCE MODE.
20.0 %
* MODE ENTER
MAINTENANCE
5-10 Model MCB10A
Yamatake Corporation Operation using the data setting device
LCD display flow
The LCD display flow of the OPERATOR'S MODE is as shown below:
* OPERATOR'S
MODE
* DAMPING
003.0 s
* AUTO ZERO
READY
* CNT-RESET VALUE
00000000
* CNT-RESET READY
PREV 00000000
* SPIKE CUT
OFF
* AVERAGING
ON 30.0 s
* DISP SELECT
TOTAL
* MODE ENTER
ENGINEERING
* OPERATOR'S
MODE
Model MCB10A 5-11
Operation using the data setting device Yamatake Corporation
5-5-1 : Changing setting of damping time constant
Damping means a response time of the primary time lag (63.2% response) for a step response of the flow rate. If the out fluctuations are large, increase the damping. A large damping value stabilizes the output but lowers the response performance. We suggest setting the damping to the largest value the system can accept.
Electromagnetic flowmeter
MCB
63.2%
Damping (s)
Input of step response Output of response
Figure 5-1 Damping output characteristics
Set the damping time constant in accordance with the following procedure:
Step Procedure Screen
1 The screen at right is a screen display example in MEASURING MODE
(measurement state).
Press the MODE key.
2 The OPERATOR'S MODE screen appears for approx. two seconds and then the damping setting screen appears.
20.0 %
01.94 m 3 /h
00069401
20.0 %
* OPERATOR'S
MODE
* DAMPING
20.0 %
005.0 s
3 Press the J key until the cursor is at the value to be changed. In this example, the key is pressed three times to move to the position
“5.”
4 Press the K or L key to display a time constant to be changed. In this example, the K key is pressed five times to change the damping time from 5 seconds to 10 seconds.
5 Press the J key until the cursor is back at the mode indicator.
Press the MODE key to return to the
MEASURING MODE and to save data.
* DAMPING
20.0 %
005.0 s
* DAMPING
20.0 %
005.0 s
* DAMPING
20.0 %
010.0 s
CAUTION
You have only ten minutes to return to MEASURING MODE to save the new value before the system resets it to the previously saved value.
5-12 Model MCB10A
Yamatake Corporation Operation using the data setting device
5-5-2 : Auto zero adjustment
Auto zero must be carried out only under the condition when the detector is filled with process fluid at zero flow. Run this function only after installing the electromagnetic flowmeter to the process pipe. Performing this function under a condition where the process fluid is not at zero flow may cause measurement errors.
Set range: None in particular
Default None in particular
Make the auto zero adjustment in accordance with the following procedure:
Step Procedure
1 The screen at right is a screen display example in MEASURING MODE (measurement state).
Press the MODE key.
2 The OPERATOR'S MODE screen appears for approx. two seconds and then the damping setting screen appears.
3 Press the K key once to display the screen as shown.
Screen
1.0 %
01.94 m 3 /h
00069401
1.0 %
* OPERATOR'S
MODE
1.0 %
* DAMPING
005.0 s
1.0 %
* AUTO ZERO
READY
4 Press the J key to move the cursor to the position READY.
* AUTO ZERO
1.0 %
READY
5 Press the K key to start the auto zero adjustment.
If the main display selects % flowrate, the display of 0.0 blinks during adjustment. With the adjustment completed, the display stops blinking with ON switched to READY.
This zero adjustment takes about one minute.
6 Press the J key to move the cursor to the position under *.
Press the MODE key to return to the
MEASURING MODE and save data.
* AUTO ZERO
0.0 %
ON
* AUTO ZERO
1.0 %
READY
1.0 %
* AUTO ZERO
READY
CAUTION
You have only ten minutes to return to MEASURING MODE to save the new value before the system resets it to the previously saved value.
Model MCB10A 5-13
Operation using the data setting device Yamatake Corporation
5-5-3 : Setting built-in counter reset value
Set a start value of the built-in counter. The scale of this value is considered as the
Set range:
Default:
00000000 - 99999999
00000000
Set an internal counter reset value in accordance with the following procedure:
Step
1
Screen
2
Procedure
The screen at the right is a screen display example in MEASURING MODE
(measurement state).
Press the MODE key.
The OPERATOR'S MODE screen appears for approx. two seconds and then the damping setting screen appears.
20.0 %
01.94 m
3
/h
00069401
20.0 %
* OPERATOR'S
MODE
* DAMPING
20.0 %
005.0 s
3 Press the K key twice to display the screen.
20.0 %
* CNT-RESET VALUE
00044444
4 Press the J key to move the cursor to the position under a target value to be changed.
20.0 %
* CNT-RESET VALUE
00000000
5 Press the K or L key to set a desired value.
20.0 %
* CNT-RESET VALUE
00005000
6 Press the J key to move the cursor to the position under *.
Press the MDOE key to return to the
MEASURING MODE and to save data.
20.0 %
* CNT-RESET VALUE
00005000
CAUTION
You have only ten minutes to return to MEASURING MODE to save the new value before the system resets it to the previously saved value.
5-14 Model MCB10A
Yamatake Corporation Operation using the data setting device
5-5-4 : Resetting built-in counter totalized value
Reset the built-in counter to start totalization from a value set as the built-in counter reset value. If this value is set to 1000, the built-in counter starts totalization from 1000 after the counter is completely reset.
If the built-in counter is reset, the built-in counter value just before the reset appears at the side of PREV on the LCD display.
Set range: None
Default: None
Reset the internal counter in accordance with the following procedure:
Step
1
Screen
2
Procedure
The screen at the right is a screen display example in MEASURING MODE
(measurement state).
Press the MODE key.
The OPERATOR'S MODE screen appears for approx. two seconds and then the damping setting screen appears.
20.0 %
01.94 m 3 /h
00069401
20.0 %
* OPERATOR'S
MODE
* DAMPING
20.0 %
005.0 s
3 Press the K key three times to display the screen shown on the right.
20.0 %
* CNT-RESET READY
PREV 00000000
4 Press the J key to move the cursor to the position READY.
20.0 %
* CNT-RESET READY
PREV 00000000
5 Press the K key to reset.
In 0.5 seconds, the reset is completed with
ON changing to READY.
20.0 %
* CNT-RESET ON
PREV 00000000
20.0 %
* CNT-RESET READY
PREV 00123456
6 Press the J key to move the cursor to the position under *.
Press the MODE key to return to the
MEASURING MODE and save data.
20.0 %
* CNT-RESET READY
PREV 00123456
CAUTION
You have only ten minutes to return to MEASURING MODE to save the new value before the system resets it to the previously saved value.
Model MCB10A 5-15
Operation using the data setting device Yamatake Corporation
5-5-5 : Setting auto spike cut
This function eliminates steep noise spikes (spike noise) in the flow rate. Noise generated when foreign matters collide with electrode is an example of the spike noise.
When the flow rate changes sharply, this function holds the outputs according to the damping time. Generally the spike noise occurs in a few milliseconds and settles down within the output holding time and the outputs are not affected. For ordinary flowrate changes, the output responds after the damping hold time.
It is not recommended to use this function for applications requiring high response and performance, e.g., the function should not be used when a pump frequently generates pulsation.
Electromagnetic flowmeter
MCB
Spike noise
Output
(not affected by noise)
Figure 5-2 Auto spike cut output characteristics
Set the auto spike cut in accordance with the following procedure.
Step
1
2
Procedure
The screen at right is a screen display example in MEASURING MODE
(measurement state).
Press the MODE key.
The OPERATOR'S MODE screen appears for approx. two seconds and then the damping setting screen appears.
Screen
20.0 %
01.94 m
3
/h
00069401
20.0 %
* OPERATOR'S
MODE
* DAMPING
20.0 %
005.0 s
3 Press the K key four times to display the screen shown on the right.
* SPIKE CUT
20.0 %
OFF
4 Press the J key to move the cursor to the
OFF position.
* SPIKE CUT
20.0 %
OFF
5-16 Model MCB10A
Yamatake Corporation Operation using the data setting device
Step
5
Procedure
Press the K or L key to select ON or OFF.
Screen
* SPIKE CUT
20.0 %
ON
6 Press the J key to move the cursor to the position under *.
Press the MODE key to return to the
MEASURING MODE and save data.
* SPIKE CUT
20.0 %
OFF
CAUTION
You have only ten minutes to return to MEASURING MODE to save the new value before the system resets it to the previously saved value.
5-5-6 : Setting moving average processing
This function is used to carry out the moving average processing of the measured flow rate values. The model MCB performs the flow rate calculation every 400 ms. For example, if the moving average process time is set to 2 seconds, the moving average processing will be carried out 2 sec./400 ms = 5 times.
If pulsation are generated, this function can be used to suppress the flow rate fluctuations.
The moving average processing can be given by the following formula:
k
∑
Qk
Qcurrent
=
Example) When the moving average processing is set to 2 sec.:
Qcurrent
=
k
+
Q
+
Q
5
+
Q
+
Q
where q
k
is a value currently measured, and Q
k
is a previous output value.
Set range: ON / OFF
ON (1.0 to 30.0 s)
Default: OFF
Electromagnetic flowmeter
MCB
Moving average time (s)
Input of step response Response output
Figure 5-3 Output characteristics of moving average processing
Model MCB10A 5-17
Operation using the data setting device Yamatake Corporation
Set the moving average processing in accordance with the following procedure:
Step
1
2
Procedure
The screen at right is a screen display example in MEASURING MODE
(measurement state).
Press the MODE key.
The OPERATOR'S MODE screen appears for approx. two seconds and then the damping setting screen appears.
Screen
20.0 %
01.94 m
3
/h
00069401
20.0 %
* OPERATOR'S
MODE
* DAMPING
20.0 %
005.0 s
3 Press the K or L key to display the screen shown on the right.
20.0 %
* AVERAGING
OFF
4 Press the J key to move the cursor to the
OFF position.
20.0 %
* AVERAGING
OFF
5
6
Press the K key to switch the OFF screen to the ON screen.
Press the J key to move the cursor to the value to be changed.
Press the K or L key to display a value to be set.
20.0 %
* AVERAGING
ON 01.0 s
20.0 %
* AVERAGING
ON 05.0 s
7 Press the J key to move the cursor back to the position under *.
Press the MODE key to return to the
MEASURING MODE and save data.
20.0 %
* AVERAGING
ON 05.0 s
CAUTION
You have only ten minutes to return to MEASURING MODE to save the new value before the system resets it to the previously saved value.
5-18 Model MCB10A
Yamatake Corporation Operation using the data setting device
5-5-7 : Selecting flow rate to be displayed in the main display
Select the flow rate to be always shown in the main display. The flow rates other than that selected for the main display are shown in the sub displays. Thereby, three flow rates can always be monitored.
Set Description
%
RATE
TOTAL
% flow rate
Actual flow rate
Totalized value
% (% flow rate): Displays % flow rate
RATE (Actual flow rate)
Setting range: %, RATE, TOTAL
Default: RATE
Select the flow rate to be shown in the main display in accordance with the following procedure:
Step
1
Procedure
The screen at right is a screen display example in MEASURING MODE
(measurement state). Press the MODE key.
Screen
20.0 %
01.94 m 3 /h
00069401
2 The OPERATOR'S MODE screen appears for approx. two seconds and then the damping setting screen appears.
20.0 %
* OPERATOR'S
MODE
* DAMPING
20.0 %
005.0 s
3 Press the K or L key to display the screen as shown on the right.
20.0 %
* DISP SELECT
%
4
5
6
Press the J key to move the cursor to the position for the flow rate display method (%,
RATE, TOTAL). The screen at right shows an example where % flow rate has been set for the main display.
Press the K or L key to select a flow rate display to be set. The screen at right shows an example where RATE (actual flow rate) display has been selected.
Press the J key to move the cursor to the position under *.
Press the MODE key to return to the
MEASURING MODE and to change to the set flow rate display.
20.0 %
* OPERATOR'S
MODE
0.30
* DISP SELECT
RATE
RATE
0.30
* DISP SELECT
RATE
RATE
CAUTION
You have only ten minutes to return to MEASURING MODE to save the new value before the system resets it to the previously saved value.
Model MCB10A 5-19
Operation using the data setting device Yamatake Corporation
5-5-8 : Entering ENGINEERING MODE and MAINTENANCE MODE
Introduction
This section describes how to enter ENGINEERING MODE, in which setup parameters for the electromagnetic flowmeter are to be configured, and
MAINTENANCE MODE, in which calibration and check are to be carried out.
The procedure for entering ENGINEERING MODE is shown below.
Step
1
Screen
2
Procedure
The screen shown right is a screen display example in MEASURING MODE
(measurement state).
Press the MODE key.
The OPERATOR'S MODE screen appears for approx. two seconds and then the damping setting screen appears.
20.0 %
01.94 m
3
/h
00069401
20.0 %
* OPERATOR'S
MODE
* DAMPING
20.0 %
005.0 s
3 Press the K key twice to display the screen as shown.
20.0 %
* MODE ENTER
ENGINEERING
4 Press the J key once to move the cursor to the position shown on the screen.
20.0 %
* MODE ENTER
ENGINEERING
5 Press the K key.
With the display is changed, ENGINEERING
MODE is active.
The screen appears in approx. two seconds.
20.0 %
# ENGINEERING
MODE
20.0 %
# ID SET
XXXXXXXX
5-20 Model MCB10A
Yamatake Corporation Operation using the data setting device
The procedure for entering MAINTENANCE MODE is shown below.
Step
1
2
Procedure
The screen shown on the right is a screen display example in MEASURING MODE
(measurement state).
Press the MODE key.
The OPERATOR'S MODE screen appears for approx. two seconds and then the damping setting screen appears.
Screen
20.0 %
01.94 m 3 /h
00069401
20.0 %
* OPERATOR'S
MODE
* DAMPING
20.0 %
005.0 s
3 Press the K key once to display the screen as shown on the right.
20.0 %
* MODE ENTER
MAINTENANCE
4 Press the J key once to move the cursor to the position shown on the screen.
20.0 %
* MODE ENTER
MAINTENANCE
5 Press the K key.
With the display changed, MAINTENANCE
MODE is active.
The screen appears in approx. two seconds.
20.0 %
> MAINTENANCE
MODE
20.0 %
> OUTPUT CHECK
MODE OFF
Model MCB10A 5-21
Operation using the data setting device Yamatake Corporation
5-6 : Configuration of ENGINEERING MODE
Introduction
ENGINEERING MODE has the following setting and adjustment items:
For details on items, see “5-6-1 : Setting ID” to “5-6-14 : Setting contact output
ID SET
Item Contents
Sets ID and TAG No.
Screen
20.0 %
# ID SET
XXXXXXXX
FUNC SET Setting of open collector output, selects pulse output or contact output.
20.0 %
# FUNC SET
PULSE
EX, DIA Sets the detector information (Ex value and bore diameter).
#
MCB
20.0 %
EX 300.0
DIA 200
SPAN Sets the flow rate range.
#
20.0 %
1.0000 m/s
SPAN 7.0690 m 3 /h
GRAVITY Sets the specific gravity when mass flow rate unit is selected.
# GRAVITY
20.0 %
1.0000
COEFFICIENT Sets a compensation coefficient for flow rate calculation.
20.0 %
# COEFFICIENT
1.0000
PLS SCL Sets flow rate (pulse scale) per pulse.
# PLS
SCL
20.0 %
10.000 Hz
200.00 l/P
PLS WID Sets the output pulse width.
# PLS
WID
20.0 %
10.000 Hz
0010 ms
5-22 Model MCB10A
Yamatake Corporation
Item
DROP OUT
Contents
Sets drop out.
Operation using the data setting device
Screen
# DROPOUT
20.0 %
10 %
LOW FLOW CUT Sets low flow cut.
20.0 %
# LOW FLOW CUT
10 %
HI-ALM/LOW-ALM Sets upper/lower limit alarm.
# HI-AIM
LO-AIM
20.0 %
100 %
0 %
ERROR OUT MODE
I. OUT
Determines the analog output failsafe direction.
20.0 %
# ERROR OUT MODE
I.OUT
HOLD
ERROR OUT MODE
P. OUT
Determines the pulse output failsafe direction.
20.0 %
# ERROR OUT MODE
P.OUT
HOLD
ST. OUT MODE Sets a contact output status.
20.0 %
# ST. OUTMODE
NORMAL CLOSE
~Note
After the MODE key is pressed, configured data in the
ENGINEERING MODE are saved in non-volatile memory. When configure data, be sure to press the MODE key to save the data.
Model MCB10A 5-23
Operation using the data setting device
LCD display flow
The ENGINEERING MODE display flow is as follows:
# ENGINEERING
MODE
Yamatake Corporation
# ID SET
XXXXXXXX
# FUNC SET
PULSE
# EX 300.0
MCB DIA 100
# 1.0000 m/s
SPAN 7.0690 m
3
/h
# GRAVITY
1.0000
# COEFFICIENT
1.0000
# PLS 10.000 Hz
SCL 196.36 m 3 /P
# PLS 30.000 %
WID 0010 ms
# DROP OUT
10 %
# LOW FLOW CUT
10 %
# HI-ALM 100 %
LO-ALM 10 %
# ERROR OUT MODE
I.OUT HOLD
# ERROR OUT MODE
P.OUT HOLD
# ST. OUT MODE
NORMAL CLOSE
5-24 Model MCB10A
Yamatake Corporation Operation using the data setting device
5-6-1 : Setting ID
You can enter a unique 8-digit alphanumeric code for the flowmeter.
Up to eight alphanumeric characters using any combination of letters (A to Z), numbers (0 to 9), - (dash), / (slash), space and period.
Set an ID in accordance with the following procedure:
Step
1
Procedure
Enter ENGINEERING MODE (see section 5-
4-10) and display the screen where the ID is to be set.
Screen
12.3 %
# ID SET
XXXXXXXX
2 Press the J key to move the cursor to the position under a desired character to be changed.
12.3 %
# ID SET
XXXXXXXX
3 Press the K or L key to select a desired character.
12.3 %
# ID SET
FXXXXXXX
4 If a target TAG NO. has been set, press the J key to move the cursor to the position under
#.
Press the MODE key to return to
MEASURING MODE and to save data.
12.3 %
# ID SET
FIC-0001
Model MCB10A 5-25
Operation using the data setting device Yamatake Corporation
5-6-2 : Selecting pulse output or contact output
Pulse output or contact output are selectable. Both of them are open collector outputs.
When pulse output has been selected:
Set pulse scale, pulse width, drop out, and burn out.
When contact output has been selected:
As a contact output, self diagnosis output (critical failure) or upper/lower limit alarm is output.
Select % flow rate value for upper/lower alarm or output status (OPEN or
CLOSE in normal (normal state)).
Setting range: PULSE: Selection of pulse output
STOUT: Selection of contact output
Default: PULSE
Select pulse output or contact output in accordance with the following procedure:
Step
1
2
Procedure
Enter ENGINEERING MODE in accordance with the entry into ENGINEERING MODE
(see section 5-4-10). Then press the K or L key to display the screen at right.
Press the J key to move the cursor to the position for set function.
Press the K or L key to display a function to be set. Select either PULSE (pulse output) or
STOUT (contact output).
Screen
# FUNCSET
20.0 %
PULSE
# FUNCSET
20.0 %
PULSE
20.0 %
# FUNCSET
STOUT
3 Press the MODE key to return to the
MEASURING MODE and to save data.
# FUNCSET
20.0 %
STOUT
CAUTION
You have only ten minutes to return to MEASURING MODE to save the new value before the system resets it to the previously saved value.
5-26 Model MCB10A
Yamatake Corporation Operation using the data setting device
5-6-3 : Setting detector information
Set detector information necessary for combination with the converter.
EX value: Each detector has a unique calibration factor (EX value).
This value is determined at shipment in accordance with the actual flow rate calibration. DO NOT change this value or the flowmeter output will be incorrect.
Detector type: Detector type is set as MCB.
Bore diameter: Sets the bore diameter (inside diameter) of the detector. The correct bore diameter is set as factory default setting.
Setting range: Detector constant: 200.0 to 699.9
Detector type: MCB
Bore diameter: 15 to 100
Set the detector information in accordance with the following procedure:
Step
1
2
3
Procedure
Enter ENGINEERING MODE in accordance with the entry into ENGINEERING MODE
(see section 5-4-10). Then press the K or L key to display the screen at right.
Press the J key to set the detector constant.
Using the K or L key, enter the numeric value found in the EX column stamped on the nameplate of the detector to be combined.
Verify the detector type is MCB.
Screen
#
12.3 %
EX 300.0
MCB DIA 050.0
#
12.3 %
EX 320.0
MCB DIA 050.0
#
12.3 %
EX 320.0
MCB DIA 050.0
4
5
Then press the J key to select the bore diameter.
Verify the bore diameter matches with the diameter on the name plate.
Using the J key, move the cursor to the position under #.
Press the MODE key to return to the
MEASURING MODE and save data.
#
12.3 %
EX 320.0
MCB DIA 100.0
#
12.3 %
EX 320.0
MCB DIA 100.0
CAUTION
You have only ten minutes to return to MEASURING MODE to save the new value before the system resets it to the previously saved value.
Model MCB10A 5-27
Operation using the data setting device Yamatake Corporation
5-6-4 : Setting flow rate range
Set the flow rate range. The lower limit of the range is ZERO. The upper limit, which is the value when the output reaches 100%, is entered here along with the selection of engineering and time units. The range has an upper limit value of 5 m/s in flow velocity when it is calculated at the upper stage of the display. It has a lower limit value of 1 m/s.
Set the flow rate range so that the regular flow rate is greater than or equal to 50% of the flow rate range.
Pressing the MODE key automatically deletes unnecessary zeros, if any, from the flow rate range.
Example: 07.069 J 7.0690 (Unnecessary zero is deleted.)
Setting range:
Flow rate range: 0 to 0.0001, 0 to 99999.
Units of flow rate:
Unit of SI volume flow rate: m
3
, 1, cm
3
Unit of SI mass flow rate: t, kg, g
Unit of non-SI volume flow rate: mG, G, kG, B, mIG, IG, kIG
Unit of SI mass flow rate: lb
Unit of time: d, h, min., s
Set the flow rate range in accordance with the following procedure:
Step
1
2
Procedure
Enter ENGINEERING MODE in accordance with the entry into ENGINEERING MODE
(see section 5-4-10). Then press the K or L key to display the screen at right.
Press the J key to move the cursor to a desired digit to be set.
Screen
#
12.3 %
1.4147 m/s
SPAN 10.000 m 3 /h
#
12.3 %
1.4147 m/s
SPAN 10.000 m
3
/h
3 Using the K or L key, change the value to a desired one.
#
12.3 %
1.4147 m/s
SPAN 20.000 m 3 /h
4 In addition, press the J key to move the cursor to the position under a desired flow rate unit. Using the K or L key, select the unit.
#
12.3 %
1.4147 m/s
SPAN 20.000 l/h
5
6
Then press the J key to move the cursor to the position under the time unit. Using the K or L key, select the unit.
Press the J key to move the cursor to the position under #.
Press MODE key to return to the
MEASURING MODE, and to save data.
#
12.3 %
1.4147 m/s
SPAN 333.33l/ min
#
12.3 %
1.4147 m/s
SPAN 333.33l/ min
CAUTION
You have only ten minutes to return to MEASURING MODE to save the new value before the system resets it to the previously saved value.
5-28 Model MCB10A
Yamatake Corporation Operation using the data setting device
5-6-5 : Setting and changing compensation coefficient
This function is used to set or change the compensation coefficient which is used to multiply the output flow rate as required.
Set range: 0.10000 to 5.9999
Default: 1.0000
Set and change a compensation coefficient in accordance with the following procedure:
Step
1
2
Procedure
Enter ENGINEERING MODE in accordance with the entry into ENGINEERING MODE
(see section 5-4-10). Then press the K or L key to display the screen at right.
Press the J key to move the cursor to the position under a desired value to be set or changed.
Screen
12.3 %
# COEFFICIENT
1.0000
12.3 %
# COEFFICIENT
1.0000
3 Using the K or L key, change the value to the desired one to be set.
12.3 %
# COEFFICIENT
1.0050
4 Press the J key to move the cursor to the position under #.
Press the MODE key to return to the
MEASURING MDOE and to save data.
12.3 %
# COEFFICIENT
1.0050
CAUTION
You have only ten minutes to return to MEASURING MODE to save the new value before the system resets it to the previously saved value.
Model MCB10A 5-29
Operation using the data setting device Yamatake Corporation
5-6-6 : Setting specific gravity
This function is used to set the specific gravity when selecting a weight unit (t, kg, g, lb) in the flow rate range setting.
Set range: 0.1000 to 5.9999
Default: 1.0000
Set the specific gravity in accordance with the following procedure:
Step
1
2
Procedure
Enter ENGINEERING MODE in accordance with the entry into ENGINEERING MODE
(see section 5-4-10). Then press the K or L key to display the screen at right.
Press the J key to move the cursor to the position under a desired value to be set or changed.
Screen
# GRAVITY
# GRAVITY
12.3 %
1.0000
12.3 %
1.0000
3 Using the K or L key, change the value to the desired one to be set.
# GRAVITY
12.3 %
1.0050
4 Press the J key to move the cursor to the position under #.
Press the MODE key to return to the
MEASURING MODE and to save data.
# GRAVITY
12.3 %
1.0050
CAUTION
You have only ten minutes to return to MEASURING MODE to save the new value before the system resets it to the previously saved value.
5-30 Model MCB10A
Yamatake Corporation Operation using the data setting device
5-6-7 : Setting pulse scale
This function is used to set the flow rate per pulse and associated units for a flowmeter.
Pulse scale of the totalization value indicated on the display is equal to the pulse scale set here.
Set range: 0.0001 to 99999.
However, the pulse scale should be set so that the pulse output span frequency fs
(shown in the auxiliary display) is between 0.0001 Hz and 500 Hz.
0.0001 Hz < fs < 500 Hz
Units of flow rate:
Unit of SI volume flow rate:
Unit of SI mass flow rate: m
3
, 1, cm t, kg, g
3
Unit of non-SI volume flow rate: mG, G, kG, B, mIG, IG, kIG
Unit of SI mass flow rate:
Unit of time: lb d, h, min., s
Default: 10.000 m
3
/P
~Note
Select the same unit systems (volume unit or mass unit) for the flow rate range and pulse scale. Selection of different unit systems for them will cause set errors (Err-22 PULSE WEIGHT SETTING
ERROR). (See “5-8-2 : Non-critical error” on page 5-54.)
Calculation method of span frequency:
Span frequency fs can be calculated by the following formula: fs = (Flow rate range)/(Pulse scale)
To calculate fs, pay attention to the following points:
* Convert flow range into the range per second.
* Select the same unit of flow rate for flow rate range and pulse scale.
Example)When flow rate range: 60 l/min., and pulse scale: 10 cm
3
/P:
1. Convert the flow rate range into the flow rate range per second.
60 l/min. J 60/60 l/s
= 1 l/s
2. Select the same unit of flow rate for flow rate range and pulse scale.
In this example, the unit of pulse scale is changed.
10 cm
3
/P J 10/1000 l/P
= 0.01 l/P
3. Calculate the span frequency.
(1 l/P) / (0.01 l/P)
= 100 Hz fs = 100 Hz
Model MCB10A 5-31
Operation using the data setting device
3 Using the K or L key, change the value to a desired pulse scale to be set.
Yamatake Corporation
Set pulse scale in accordance with the following procedure:
Step
1
2
Procedure
Enter ENGINEERING MODE in accordance with the entry into ENGINEERING MODE
(see section 5-4-10). Then press the K or L key to display the screen at right.
Press the J key to move the cursor to the position under a desired value to be set or changed.
Screen
12.3 %
# PLS 27.780 Hz
SCL 100.00 l/p
12.3 %
# PLS 27.780 Hz
SCL 100.00 l/p
12.3 %
# PLS 13.890 Hz
SCL 200.00 l/p
4 Press the J key to move the cursor to the position under #.
Press the MODE key to return to the
MEASURING MDOE and to save data.
12.3 %
# PLS 13.890 Hz
SCL 200.00 l/p
CAUTION
You have only ten minutes to return to MEASURING MODE to save the new value before the system resets it to the previously saved value.
5-32 Model MCB10A
Yamatake Corporation Operation using the data setting device
5-6-8 : Setting pulse width
Set a pulse width. The pulse width should be set in accordance with the specifications of the pulse receiver installed.
Set range
DUTY 50%
Pulse width that is DUTY 50% of the span frequency, and 1,000 ms (1s) maximum. The pulse duty ratio defines the pulse ON time versus the pulse
OFF time as a percentage of the total pulse cycle.
NUM (setting of a real value)
0001 to 1,000 ms (1 s)
* With DUTY 50%, no setting error appears.
* With NUM (with a real value set), a setting error occurs if the pulse width exceeds the DUTY ratio of 70% in span frequency.
Default:
DUTY 50%
Method of setting pulse width:
The DUTY ratio is B/A (%) in the diagram at right.
B
1. NUM (when real pulse width is selected)
DUTY ratio < 70%
Set the pulse width as shown above.
Calculation method: When the range is 360 m
3
, and pulse scale is 2 l/P,
First convert the unit of range to calculate the span frequency.
Convert the range into the unit of per-second (/s).
360 m
3
/s J 0.1 m
3
/s
A
Convert the unit of flow rate range to be same as the unit of pulse scale.
0.1 m
3
/s J 0.1*1000 l/s
100 l/s
Calculation of span frequency
(100 l/s) / (2 l/P)
= 50 Hz
50 Hz
J
20 ms (= A)
Calculation of pulse width where the DUTY ratio is equivalent to 70%
B= 0.7
×
A
= 0.7
×
20 ms
= 14 ms
Therefore, set the pulse width to less than 14 ms.
Model MCB10A 5-33
Operation using the data setting device Yamatake Corporation
2. DUTY 50% (Automatically set)
Selecting DUTY 50% automatically sets the pulse width as follows:
Calculation method 1
Make calculations to obtain a pulse width that is DUTY 50% of the span frequency. The pulse width is automatically set. In this case, the calculated value of the pulse width does not appear on the display.
Calculation method 2
In addition, if the pulse width calculated by the calculation method 1 exceeds 1 second, the pulse width is set to 1 second.
Calculation method 1: When the range is 360 m
3
/h, and pulse scale is 2 l/P,
First convert the unit of range to calculate the span frequency.
Convert the range into the unit of per-second (/s).
360 m
3
/h J 0.1 m
3
/s
Convert the unit of flow rate range to be same as the unit of pulse scale.
0.1 m
3
/s J 0.1
×
1000 l/s
100 l/s
Calculation of span frequency
(100 l/s) / (2 l/P)
= 50 Hz
50 Hz J 20 ms (= A)
Calculation of pulse width where the DUTY ratio is equivalent to 50%
B = 0.5
×
A
= 0.5
×
20 ms
= 10 ms
Therefore, the pulse width is 10 ms.
Calculation method 2: When the range is 36 m
3
/h, and pulse scale is 100 l/P,
First convert the unit of range to calculate the span frequency.
Convert the range into the unit of per-second (/s).
36 m
3
/h J 0.01 m
3
/s
Convert the unit of flow rate range to be same as unit of pulse scale.
0.01m
3
/s J 0.01
×
1000 l/s
10 l/s
Calculation of span frequency
(10 l/s) / (100 l/p)
= 0.1 Hz
0.1 Hz J 10 s (= A)
Calculation of pulse width where the DUTY ratio is equivalent to 50%
B = 0.5
×
A
= 0.5
×
10 s
= 5 s
Because the calculated pulse width exceeds 1 s, it takes 1s.
5-34 Model MCB10A
Yamatake Corporation
3
Operation using the data setting device
Set a pulse width in accordance with the following procedure:
Step
1
2
Procedure
Enter ENGINEERING MODE in accordance with the entry into ENGINEERING MODE
(see section 5-4-10). Then press the K or L key to display the screen at right.
Press the J key to move the cursor to the position under NUM.
Screen
12.3 %
# PLS 27.778 %
WID NUM 010.00ms
12.3 %
# PLS 27.778 %
WID NUM 010.00ms
Pressing the K key switches a screen for entering a numeric value for pulse width to a screen for fixing the DUTY ratio to 50%.
12.3 %
# PLS
WID DUTY 50 %
4
5
To enter a numeric value for pulse width, press the K key to return to the screen for the entry of numeric values. Using the J key, move the cursor to the position under a desired digit to be set.
Using the K or L key, change the value to a desired value to be set.
12.3 %
# PLS 27.778 %
WID NUM 010.00ms
12.3 %
# PLS 13.889 %
WID NUM 005.00ms
6 Press the J key to move the cursor to the position under #.
Press the MODE key to return to the
MEASURING MODE and to save data.
12.3 %
# PLS 13.889 %
WID NUM 005.00ms
CAUTION
You have only ten minutes to return to MEASURING MODE to save the new value before the system resets it to the previously saved value.
Model MCB10A 5-35
Operation using the data setting device Yamatake Corporation
5-6-9 : Setting drop out
This function is used to set the drop out value for the pulse output. The pulse output will be cut off at this point to avoid flow pulsation in range values close to zero, thus preventing incorrect totalization of the flow rate.
Pulse counting pauses when the flow rate reaches this preset percentage of the set range.
Setting range: 0 to 10%
Default: 5%
Set drop out in accordance with the following procedure:
Step
1
2
Procedure
Enter ENGINEERING MODE in accordance with the entry into ENGINEERING MODE
(see section 5-4-10). Then press the K or L key to display the screen at right.
Press the J key.
Screen
# DROPOUT
12.3 %
05 %
# DROPOUT
12.3 %
05 %
3 Using the K or L key, change the value to a desired value to be set.
# DROPOUT
12.3 %
06 %
4 Press the J key to move the cursor to the position under #.
Press the MODE key to return to the
MEASUREMENT MODE and to save data.
# DROPOUT
12.3 %
06 %
CAUTION
You have only ten minutes to return to MEASURING MODE to save the new value before the system resets it to the previously saved value.
5-36 Model MCB10A
Yamatake Corporation Operation using the data setting device
5-6-10 : Setting low flow cutoff
This function is used to set the low flow cutoff value. When the flow rate reaches the entered value, the analog output is cut off and latched to 4 mA (display flow rate of
0%) to avoid errors due to flow pulsation in range value close to zero.
Also, for reverse flow rate, the output is latched to 4 mA (display flow rate of 0%)
The lower limit of the low flow cutoff setting is determined by the velocity range.
1. If the velocity range exceeds 3 m/s, the lower limit value is 1%.
2. If the velocity range is 3 m/s or less, the lower limit value will cut the velocity of
0.03 m/s or less flow the rate.
Example: If the velocity range is set as 2 m/s, the lower limit of the low flow cutoff value is 1.5%. (= 0.03/2 = 0.015 = 1.5%)
Setting range: 1 to 10%
Default: 5%
Set low flow cut in accordance with the following procedure:
Step
1
2
Procedure
Enter ENGINEERING MODE in accordance with the entry into ENGINEERING MODE
(see section 5-4-10). Then press the K or L key to display the screen at right.
Press the J key.
The cursor then moves to the position of the low flow cut value.
Screen
12.3 %
# LOW-FLOW CUT
05 %
12.3 %
# LOW-FLOW CUT
05 %
3 Using the K or L key, change the value to a desired value to be set.
12.3 %
# LOW-FLOW CUT
06 %
4 Press the J key to move the cursor to the position under #.
Press the MODE key to return to
MEASURING MODE and to save data.
12.3 %
# LOW-FLOW CUT
06 %
CAUTION
You have only ten minutes to return to MEASURING MODE to save the new value before the system resets it to the previously saved value.
Model MCB10A 5-37
Operation using the data setting device Yamatake Corporation
5-6-11 : Setting upper and lower limit alarm
This function is used to set the upper and lower limit alarm set points when the contact output is selected.
An alarm is output when the flow rate exceeds these preset upper and lower limits.
The alarm output status depends on the “Setting contact output status” described later.
Set range: HI-ALM 0% to +115%
LO-ALM 0% to +115%
Default: HI-ALM +115%
LO-ALM 0%
Set the upper/lower limit alarm in accordance with the following procedure:
Step
1
2
Procedure
Enter ENGINEERING MODE in accordance with the entry into ENGINEERING MODE
(see section 5-4-10). Then press the K or L key to display the screen at right.
Using the J key, move the cursor to the position under a digit to be set or changed.
Screen
12.3 %
# HI-ALM +115%
LO-ALM +000%
12.3 %
# HI-ALM +100%
LO-ALM -000%
3 Using the K or L key, change the value to the desired value to be set.
12.3 %
# HI-ALM +080%
LO-ALM -000%
4 Press the J key to move the cursor to the position under #.
Press MODE key to return to the
MEASURING MODE and to save data.
However, set as follows: HI-ALM > LO-ALM.
12.3 %
# HI-ALM +080%
LO-ALM -000%
5-38 Model MCB10A
Yamatake Corporation Operation using the data setting device
5-6-12 : Selecting failsafe mode for analog outputs
This function is used to determine the analog output direction when the flowmeter detects a critical status condition.
CAUTION
The failsafe mode is very important for the overall safety of the control process.
Choose the failsafe direction carefully, as equipment damage can result from a wrong choice.
Setting range: LOW Analog output is driven to low scale value. (TYP 3.7 mA)
HIGH Analog output is driven to high scale value. (TYP 21.8 mA)
HOLD Analog output is held at its last good value.
Default: LOW
Set failsafe mode for analog output in accordance with the following procedure:
Step
1
2
Procedure
Enter ENGINEERING MODE in accordance with the entry into ENGINEERING MODE
(see section 5-4-10). Then press the K or L key to display the screen at right.
Press the J key.
Screen
12.3 %
# ERROR OUT MODE
I.OUT LOW
12.3 %
# ERROR OUT MODE
I.OUT LOW
3 Using the K or L key, determine the failsafe mode for analog output.
12.3 %
# ERROR OUT MODE
I.OUT HIGH
4 Press the J key to move the cursor to the position under #.
Press the MODE key to return to the
MEASURING MODE and to save data.
12.3 %
# ERROR OUT MODE
I.OUT HIGH
CAUTION
You have only ten minutes to return to MEASURING MODE to save the new value before the system resets it to the previously saved value.
Model MCB10A 5-39
Operation using the data setting device Yamatake Corporation
5-6-13 : Selecting failsafe mode for pulse output
This function is used to determine the pulse output direction when the flowmeter detects a critical status condition.
CAUTION
The failsafe mode is very important for the overall safety of the control process.
Choose the failsafe direction carefully, as equipment damage can result from a wrong choice.
Set range: OFF Outputs no pulse.
HOLD Pulse output signal held at its present state
Default: OFF
Set failsafe mode for pulse output in accordance with the following procedure:
Step
1
2
Procedure
Enter ENGINEERING MODE in accordance with the entry into ENGINEERING MODE
(see section 5-4-10). Then press the K or L key to display the screen at right.
Press the J key.
Screen
12.3 %
# ERROR OUT MODE
P.OUT OFF
12.3 %
# ERROR OUT MODE
P.OUT OFF
3 Using the K or L key, determine the failsafe mode for pulse output.
12.3 %
# ERROR OUT MODE
P.OUT HOLD
4 Press the J key to move the cursor to the position under #.
Press the MODE key to return to the
MEASURING MODE and to save data.
12.3 %
# ERROR OUT MODE
P.OUT HOLD
CAUTION
You have only ten minutes to return to MEASURING MODE to save the new value before the system resets it to the previously saved value.
5-40 Model MCB10A
Yamatake Corporation Operation using the data setting device
5-6-14 : Setting contact output status
This function is used to set contact output status for normal operation.
This function is effective only when contact output has been selected is the function specification.
Set range: CLOSE Sets the open collector output to ON.
OPEN Sets the open collector output to OFF.
Default: OPEN
Set the contact output status in accordance with the following procedure:
Step
1
2
Procedure
Enter ENGINEERING MODE in accordance with the entry into ENGINEERING MODE
(see section 5-4-10). Then press the K or L key to display the screen at right.
Press the J key.
Screen
12.3 %
# ST. OUT MODE
NORMAL CLOSE
12.3 %
# ST. OUT MODE
NORMAL CLOSE
3 Using the K key, set the contact output status.
12.3 %
# ST. OUT MODE
NORMAL OPEN
4 Press the J key to move the cursor to the position under #.
Press the MODE key to return to the
MEASURING MODE and to save data.
12.3 %
# ST. OUT MODE
NORMAL OPEN
CAUTION
You have only ten minutes to return to MEASURING MODE to save the new value before the system resets it to the previously saved value.
Model MCB10A 5-41
Operation using the data setting device Yamatake Corporation
5-6-15 : Selecting failsafe mode for pulse output
This function is used to determine the pulse output direction when the flowmeter detects a critical status condition.
CAUTION
The failsafe mode is very important for the overall safety of the control process.
Choose the failsafe direction carefully, as equipment damage can result from a wrong choice.
Set range: OFF Outputs no pulse.
HOLD Pulse output signal held at its present state.
Default: OFF
Set failsafe mode for pulse output in accordance with the following procedure:
Step
1
2
Procedure
Enter ENGINEERING MODE in accordance with the entry into ENGINEERING MODE
(see section 5-4-10). Then press the K or L key to display the screen at right.
Press the J key.
Screen
12.3 %
# ERROR OUT MODE
P.OUT OFF
12.3 %
# ERROR OUT MODE
P.OUT OFF
3 Using the K or L key, determine the failsafe mode for pulse output.
12.3 %
# ERROR OUT MODE
P.OUT HOLD
4 Press the J key to move the cursor to the position under #.
Press the MODE key to return to the MEA-
SURING MODE and to save data.
12.3 %
# ERROR OUT MODE
P.OUT HOLD
CAUTION
You have only ten minutes to return to MEASURING MODE to save the new value before the system resets it to the previously saved value.
5-42 Model MCB10A
Yamatake Corporation Operation using the data setting device
5-7 : Configuration of MAINTENANCE MODE
Introduction
MAINTENANCE MODE consists of the following three types: OUTPUT CHECK
MODE, CALIBRATION MODE, and CRITICAL MODE. For details on the modes, see the following pages.
LCD display flow
The LCD display flow of MAINTENACE MODE is as follows:
> MAINTENANCE
MODE
Displayed for 3 sec
> OUTPUT CHECK
MODE OFF
> CALIBRATION
MODE OFF
> CRITICAL
MODE OFF
Model MCB10A 5-43
Operation using the data setting device
5-7-1 : Configuration of OUTPUT CHECK MODE
Yamatake Corporation
Introduction
OUTPUT CHECK MODE has the following setting and adjustment items.
For details on the function of items, see the following pages.
Screen Item
OUTPUT
CHECK
I.OUT
Content
Outputs a fixed value of analog current output to perform loop checks.
12.3 %
> OUTPUT CHECK
I.OUT 100%
OUTPUT
CHECK
P.OUT
Outputs a fixed value of pulse output to perform loop checks.
12.3 %
> OUTPUT CHECK
P.OUT 100%
OUTPUT
CHECK
ST.OUT
Outputs a fixed value of contact output to perform loop checks.
12.3 %
> OUTPUT CHECK
ST.OUT CLOSE
LCD display flow
The screen flow of OUTPUTCHECK MODE is as follows:
> OUTPUT CHECK
I.OUT 100%
> OUTPUT CHECK
P.OUT 100%
> OUTPUT CHECK
ST.OUT CLOSE
> OUTPUT CHECK
MODE OFF
5-44 Model MCB10A
Yamatake Corporation Operation using the data setting device
5-7-2 : Performing loop checks of analog outputs
Analog output check
The electromagnetic flowmeter can be used as a constant current generator to check analog outputs. Other instruments in the analog current output loop, such as recorders and controllers can be checked.
Default setting
Displays the current output value.
Setting range
Range settings are allowed ranging from 0 to 100%.
Perform loop checks of analog outputs in accordance with the following procedure:
Step
1
2
Procedure
Enter MAINTENANCE MODE in accordance with the entry into
MAINTENANCE MODE (see section 5-4-
10). Then display the screen at right.
Press the J key to move the cursor to the
OFF position.
Press the K key. With the display switched from OFF to ON, the output check mode is then active.
Screen
20.0 %
> OUTPUT CHECK
MODE OFF
20.0 %
> OUTPUT CHECK
MODE OFF
20.0 %
> OUTPUT CHECK
MODE ON
20.0 %
> OUTPUT CHECK
I.OUT 000.0%
3 Press the J key to move the cursor to the position under a desired value to be checked.
20.0 %
> OUTPUT CHECK
I.OUT 000.0%
4
5
Pressing the K or L key, change the value to the desired value to be checked. As shown on the screen on the right, the output to the range, given as an analog output, is 100% i.e.
20 mA.
Press the J key to move the cursor to the position under >.
Movement to another screen by using the K or
L key returns to an analog output according to the actual flow rate.
20.0 %
> OUTPUT CHECK
I.OUT 100.0%
20.0 %
> OUTPUT CHECK
I.OUT 100.0%
Model MCB10A 5-45
Operation using the data setting device
5-7-3 : Performing loop checks of pulse outputs
Yamatake Corporation
Pulse output check
The electromagnetic flowmeter can be used as a pulse generator to check pulse outputs.
This screen appears when pulse output has been selected in FUNC SET of
ENGINEERING MODE (see “5-6-2 : Selecting pulse output or contact output”).
Default setting
Displays the current output value.
Setting range
Range settings are allowed ranging from 0 to 100%.
Perform loop checks of pulse outputs in accordance with the following procedure:
Step
1
2
Procedure
Enter MAINTENANCE MODE in accordance with the entry into
MAINTENANCE MODE (see section 5-4-
10). Then display the screen at right.
Press the J key to move the cursor to the
OFF position.
Press the - key. With the display switched from OFF to ON, the output check mode is then active.
Screen
20.0 %
> OUTPUT CHECK
MODE OFF
20.0 %
> OUTPUT CHECK
MODE OFF
20.0 %
> OUTPUT CHECK
MODE ON
20.0 %
> OUTPUT CHECK
I.OUT 000.0%
3 Press the K key to display the screen at right.
20.0 %
> OUTPUT CHECK
P.OUT 000.0%
4 Press the J key to move the cursor to the position under a desired value to be checked.
20.0 %
> OUTPUT CHECK
P.OUT 000.0%
5
6
Pressing the K or L key, change the value to the desired value to be checked. On the screen at right, a frequency pulse corresponding to flow rate signal 100% is output.
Press the J key to move the cursor to the position shown on the screen at right.
Movement to another screen by using the K or
L key returns to a pulse output according to the actual flow rate.
20.0 %
> OUTPUT CHECK
I.OUT 100.0%
20.0 %
> OUTPUT CHECK
I.OUT 100.0%
5-46 Model MCB10A
Yamatake Corporation Operation using the data setting device
5-7-4 : Performing loop checks of contact outputs
Contact output check
Contact outputs of electromagnetic flowmeter can be turned on and off to perform loop checks of contact output signals.
This screen appears when contact output has been selected in FUNC SET of
ENGINEERING MODE (see “5-6-2 : Selecting pulse output or contact output”).
Default setting
Displays the current contact output status.
Setting range
Set range “CLOSE” and “OPEN”
Perform loop checks of contact outputs in accordance with the following procedure:
Step
1
2
Procedure
Enter MAINTENANCE MODE in accordance with the entry into
MAINTENANCE MODE (see section 5-4-
10). Then display the screen at right.
Press the J key to move the cursor to the
OFF position.
Press the K key. With the display switched from OFF to ON, the output check mode is then active.
Screen
20.0 %
> OUTPUT CHECK
MODE OFF
20.0 %
> OUTPUT CHECK
MODE OFF
20.0 %
> OUTPUT CHECK
MODE ON
20.0 %
> OUTPUT CHECK
I.OUT 000.0%
3
4
Press the K key twice to display the screen at right.
In this status, a contact output corresponding to the display is output.
Press the J key to move the cursor to the
OPEN or CLOSE position that indicates the status of contact output.
20.0 %
> OUTPUT CHECK
ST.OUT CLOSE
20.0 %
> OUTPUT CHECK
ST.OUT CLOSE
5 Press the J key to move the cursor to the position under >.
Movement to another screen by using the K or
L key returns the contact output to the output status according to the current status.
20.0 %
> OUTPUT CHECK
ST.OUT CLOSE
Model MCB10A 5-47
Operation using the data setting device
5-7-5 : Configuration of CALIBRATION MODE
Yamatake Corporation
Introduction
CALIBRATION MODE has the following setting and adjustment items:
Configuration of CALIBRATION MODE requires a dedicated calibrator.
Wrong operation may hinder accurate measurements of the flow rate. To operate in this mode, contact Yamatake representative.
Screen Item
CAL I.OUT
LOW 4.000 mA
Content
Adjusts 4 mA analog current output.
12.3 %
> CAL I.OUT OFF
LOW 4.000
CAL I.OUT
HIGH 20.00 mA
Adjusts 20 mA analog current output.
12.3 %
> CAL I.OUT OFF
CAL P.OUT
FREQ 90 Hz
Adjusts 90 Hz pulse output.
CAL GAIN
ZERO
CAL GAIN
5 m/s
Adjusts 0 m/s gain.
Adjusts 5 m/s gain.
12.3 %
> CAL P.OUT OFF
FREQ
12.3 %
> CAL GAIN OFF
ZERO READY
12.3 %
> CAL GAIN OFF
5-48 Model MCB10A
Yamatake Corporation Operation using the data setting device
LCD display flow
The LCD display flow of CALIBRATION MODE is as follows:
> CAL I. OUT OFF
LOW 4.000
> CAL I.OUT OFF
> CAL P.OUT OFF
FREQ
> CAL GAIN
ZERO READY
> CAL GAIN
5.0 READY
> CRITICAL
MODE OFF
Model MCB10A 5-49
Operation using the data setting device
5-7-6 : Configuration of CRITICAL MODE
Yamatake Corporation
Introduction
CRITICAL MODE has the following setting and adjustment items:
Item
ROM VER
DATE
Displays the ROM version and date.
Content Screen
> ROM VER.
20.0 %
DATE YY-MM-DD
SHIPPING DATA
(default value)
RECOVERY
INITIAL
DATA
RECOVERY
You can return the device to factory setting/default values for pertinent operational and configuration parameters.
These parameters are entered before the device is shipped, so they are commonly referred to as
“shipping data”.
They include factory calibration data and factory settings or initial default settings for customer configuration data.
Initial data recovery eliminates all calibration data and configuration parameters.
DO NOT use this function.
LCD display flow
The screen flow of CRITICAL MODE is as follows:
20.0 %
> SHIPPING DATA
> INITIAL
20.0 %
DATA
> ROM VER. 3.00
DATE 02-07-15
> SHIPPING DATA
CAUTION
> INITIAL DATA
> OUTPUT CHECK
MODE OFF
CAUTION
INITIAL DATA RECOVERY function is only for Yamatake service/maintenance specialist.
Please DO NOT use this function.
If this function is turned ON, all calibrated data will be deleted. The device needs to be sent back to the factory to calibrate again.
5-50 Model MCB10A
Yamatake Corporation Operation using the data setting device
5-7-7 : Displaying ROM version and date
Displaying ROM version
The ROM version and date of the converter can be displayed on the display screen.
Display the ROM version and data in accordance with the following procedure:
Step
1
2
Procedure
Enter MAINTENANCE MODE in accordance with the entry into
MAINTENANCE MODE (see section 5-4-
10). Using the K or L key, display the screen at right.
Press the K key twice to display the screen at right.
Screen
20.0 %
> OUTPUT CHECK
MODE OFF
20.0 %
> CRITICAL
MODE OFF
3 Press the J key to move the cursor to the
OFF position. Then press the - key to switch the display from OFF to ON.
20.0 %
> CRITICAL
MODE ON
4 After the entry into CRITICAL MODE, the screen at right appears. On the screen, the
ROM version and date can be checked.
> ROM VER.
20.0 %
DATE YY-MM-DD
Model MCB10A 5-51
Operation using the data setting device
5-7-8 : Returning to settings at shipment
Yamatake Corporation
SHIPPING DATA (default value) RECOVERY
Performing SHIPPING DATA RECOVERY returns the internal data settings of the device to the settings at time of shipment.
Note that executing this operation erases the data that was set and changed by the customer.
Perform SHIPPING DATA RECOVERY in accordance with the following procedure:
Step
1
2
Procedure
Enter MAINTENANCE MODE in accordance with the entry into MAINTENANCE MODE
(see section 5-4-10). Using the K or L key, display the screen at right.
Press the K key twice to display the screen at right.
Screen
20.0 %
> OUTPUT CHECK
MODE OFF
20.0 %
> CRITICAL
MODE OFF
3 Press the J key to move the cursor to the
OFF position. Then press the K key to switch the display from OFF to ON.
After the entry into CRITICAL MODE, the screen at right appears.
20.0 %
> CRITICAL
MODE ON
> ROM VER.
20.0 %
DATE YY-MM-DD
4 Press the K key to display the screen at right.
20.0 %
> SHIPPING DATA
5
6
Press the J key to move the cursor to the
READY position, and then keep pressing the
K key for three seconds or more.
SHIPPING DATA RECOVER starts.
The display will change as shown on the screen at right.
20.0 %
> SHIPPING DATA
20.0 %
> SHIPPING DATA
RECOVERY ON
5-52
7 When SHIPPING DATA RECOVERY ends, the data settings return to those at the time of shipping, and then the MEASURING MODE screen reappears.
20.0 %
01.94 m 3 /h
00069401
Model MCB10A
Yamatake Corporation Operation using the data setting device
5-8 : Description of error messages
Introduction
Errors are classified into critical failure and non-critical failure.
5-8-1 : Critical failure
Critical failure may obstruct the electromagnetic flowmeter operation, if not corrected, ultimately damage the flowmeter. When critical failure occurs during operation, an error message will appear on the converter’s display and the electromagnetic flowmeter will continue to output the preset value in the abnormality treatment
(failsafe) direction. The error message and the self-diagnostic results will be visible on the display.
Perform the proper correction measures, referring to the actions below.
Error code of critical failure
Error code Error content
Err-02 CPU (ROM, RAM)
CHECK SUM
ERROR
Action
1. Restore power.
LCD display
Err - 02
CPU CHECK
ERROR
Err-04 NVM
READ AFTER
WRITE ERROR
1. Restore power.
Err - 04
NVM CHECK
ERROR
Err-05 AD converter error 1. Restore power.
Err - 05
ADC CHECK
ERROR
Err-06 POWER supply is too low.
1. Check the power supply voltage.
Err - 06
POWER DOWN
ERROR
Model MCB10A 5-53
Operation using the data setting device Yamatake Corporation
5-8-2 : Non-critical error
Non-critical failures will not seriously affect electromagnetic flowmeter operation.
When an error occurs during operation and is regarded as a non-critical problem by the converter self-diagnostics, the output will not burn-out and the electromagnetic flowmeter will continue to output the measured value.
If a wrong setting is found, an error message is displayed for a second, and then the screen set wrongly is displayed.
Error code of non-critical errors
Error code
Error content Action
Err-12 Upper/lower limit alarm set error
HI < LO is set.
Set HI>LO.
LCD display
Err - 12
SETTING ERROR
HI<LO
Err-21 Span is set to 12 m/s or more.
Check the settings of flow rate range and detector information
(bore diameter and detector type).
Err-22 Pulse frequency is too large or too small.
The flow rate range unit system is different from the pulse unit system.
Example:
SPAN m
3
/h pulse scale t/h
1. Check pulse scale.
2. Check the setting of pulse frequency.
3. Adopt a unified unit system.
Err-23 The pulse width is too large.
When pulse frequency is output, the duty is
70% or more.
Check the following settings:
1. Pulse width
2. pulse scale
3. Span
Err - 21
SPAN ERROR
OVER 12
Err - 22
PULSE WEIGHT
Err - 23
PULSE WIDTH
OVER DUTY 70%
5-54 Model MCB10A
Yamatake Corporation Operation using the data setting device
Non-critical error (CALIBRATION MODE)
S H I P P I N G D A T A
OVER LIMIT AUTO ZERO ERROR
Display conditions: If the velocity is ±0.2 m/s or more at zero adjustment.
Displayed for 2 seconds (sub-indication)
OVER LIMT AUTO SPAN ERROR
Display conditions: If the input velocity is ±30% or more at gain adjustment.
Displayed for 2 seconds (sub-indication)
INTIAL DATA RECOVERYDE
Display conditions: When INTITIAL DATA RECOVERY is executed.
Displayed for 3 seconds (sub-indication) after rebooted and after the entire LCD indication is displayed.
SHIPPING DATA RECOVERY
Display conditions: When SHIPPING DATA RECOVERY is executed. Displayed for 3 seconds (subindication) after rebooted and after the entire
LCD indication is displayed.
5-8-3 : Status indication
E M P T Y
S T A T U S
OVER LIMIT +115%
Display conditions:
If the present flow rate exceeds +115% of the measuring range.
Blinks (main indication)
EMPTY STATUS
Display conditions:
When the detector liquid level is at the electrode level or lower.
Blinks (7-segment, two rows)
NOT CALIBRATED
Display conditions:
If no adjustments have been done (after
INITIAL DATA RECOVERY).
Blinks (main indication)
MEASURING MODE
Display conditions:
When returning to MEASURING MODE (after power-on, after setting is completed by the
MODE key, and while internal arithmetic operation is taking place after communication).
Displayed for 2 seconds (sub-indication)
Model MCB10A 5-55
Operation using the data setting device Yamatake Corporation
5-56 Model MCB10A
Chapter 6 : Maintenance and troubleshooting
Outline of this chapter
This chapter presents an instrument maintenance and inspection procedure and information to refer to when doing troubleshooting. Ensure the measures to take according to the phenomena.
Model MCB10A 6-1
Maintenance and troubleshooting Yamatake Corporation
6-1 : Maintenance and inspection of hardware
6-1-1 : Replacement of indicator/data setter
Procedure
Replacement procedure is as follows.
Step
1
2
3
4
5
6
7
8
Procedure
Turn off the power to the converter. For the power-off, use a circuit breaker or the like.
The converter front cover is fixed by hexagon socket head screws (M3).
Loosen these screws with an Allen wrench (1.5).
Remove the transducer front cover by turning it counterclockwise with the dedicated tool.
~Note
Remove the front cover straight toward you with care.
Remove the 3 fixing screws.
~Note
The screws are not captive to the indicator/data setter, so take care not to drop them.
Remove the indicator/data setter.
~Note
A cable is attached to the rear of the indicator/data setter. This cable is connected to the connector of the converter proper.
Place the indicator/data setter in the desired direction and align it with the threaded holes in the converter proper.
Fix the indicator/data setter again using the three screws.
~Note
When tightening the screws, take care not to entangle and squeeze the cable.
Attach the front cover.
~Note
Take care not injure your fingers on the cover edge or the thread in the main body.
6-2
Figure 6-1 Replacement of indicator/data setter (with the cover removed)
Model MCB10A
Yamatake Corporation
6-2 : Troubleshooting
6-2-1 : Types of troubles
Maintenance and troubleshooting
Introduction
The troubles that can occur when booting and starting up the instrument include the following three types:
• Troubles caused by inconsistencies between the specifications and actual service conditions of the instrument
• Troubles caused by mistakes in settings or operations
• Troubles caused by failures of the instrument
The troubles that can occur while running the instrument are divided into critical failures and non-critical failures as described below, and they are recognized, indicated or treated as such by the self-diagnosis function of the instrument.
If a trouble should occur, take the appropriate measure referring to the troubleshooting guide given here.
Critical failure
A critical failure is defined as a state or failure that causes a grave hindrance to the operation of the instrument and may lead to damage to the instrument itself if left untreated. If a grave trouble occurs while the instrument is running, an error message is displayed on the display panel of the main unit and the output continues to deliver the value that was set in the direction of abnormality processing
Non-critical failure
A non-critical failure is defined as a state or failure that does not cause a grave hindrance to the operation of the instrument. If some trouble occurs while the instrument is running but the instrument judges it by self-diagnosis as a minor trouble, the output does not switch to the abnormality processing output and the instrument continues to deliver the instantaneous flow rate value.
Model MCB10A 6-3
Maintenance and troubleshooting
6-2-2 : Troubles at startup
Yamatake Corporation
Troubleshooting
If a trouble should occur at the start of running, take measures according to the following table. If the trouble cannot be solved even if measures are taken according to the following table, the instrument may have broken down. Contact the nearest
Yamatake Corporation office or Yamatake Corporation representative service offices.
Trouble Points to check and measures
Nothing is displayed on the indicator when powered on.
• Check the specifications of the power source.
• Check the wiring.
• Check that the ambient temperature is not under -4°F
(-20°C).
• Check the signal line for correct connection.
No output is sent out when powered on.
Pulse output is not delivered.
• Check the counter type, input specifications and contact capacity.
• Check the pulse setting of the flowmeter.
6-4 Model MCB10A
Yamatake Corporation
6-2-3 : Trouble during operation
Maintenance and troubleshooting
Troubleshooting
If trouble occurs during operation, maintain in the following procedure.
1. Search for the symptom of the trouble in the table on this page. If found, maintain according to the table.
2. If communication is possible, read the error message and self-diagnosis results.
Maintain referring to “Error messages and troubleshooting”.
3. If the above steps cannot solve the trouble, the instrument may have broken down.
Contact the nearest our customer service offices.
Trouble
The output value fluctuates with a much larger amplitude than the expected variation range of flow rate.
The output value exceeds
100%.
The output value stays at
0%.
The output is burnt out.
The pulse output is too large or too small for the flow rate.
Check point and troubleshooting
• Check that the instrument is grounded correctly.
• Check that the damping time constant is set correctly.
• Clean the electrodes.
• Check that the range is set correctly.
• Check that zero is adjusted correctly.
• Check that the signal line is connected correctly.
• Check the upstream and downstream valves.
• Check that the range is set correctly.
• Isn't the instrument in the constant current mode?
• Check that the flow rate is not within the set range of low-flow cutoff.
• Check that the flow rate is not reversed (negative flow rate).
• Check the detector for unfilled condition, too low conductivity, excessive noise, or the like.
• Take measures referring to “Error messages and measures”.
• Is the pulse setting (weight and width) correct?
• Is the output from the main unit correct?
• Is a pulse counter of appropriate specifications used?
• Is the dropout value correctly set between 0 and
10%.
Model MCB10A 6-5
Maintenance and troubleshooting Yamatake Corporation
6-6 Model MCB10A
Document Number:
Document Name:
Date:
Issued/Edited by:
CM2-MCB100-2001
Magcube Electromagnetic Flowmeter
General type
Model: MCB10A
User’s Manual
Apr. 2004 (First issue)
Dec. 2004 (Rev. 1)
Yamatake Corporation
2-12-19 Shibuya
Shibuya-ku, Tokyo 150-8316
Japan
Tel :
Fax :
81-3-3486-2310
81-3-3486-2593
This has been printed on recycled paper.
Savemation
Saving through Automation
http://www.yamatake.com/
advertisement
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Related manuals
advertisement