Instruction
Manual
MT10
Mini Manometer
IM 265301-01E
5th Edition
This User's Manual contains useful information about the functions and operating procedures as well as the handling precautions for the
MT10 mini manometer. To ensure correct use of the MT10 mini manometer, please read this manual thoroughly before use.
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The contents of this manual are subject to change without prior notice.
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All rights reserved. No part of this manual may be reproduced or transmitted in any form or by any means without the written
permission of Yokogawa.
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Every effort has been made in the preparation of this document to ensure the accuracy of its contents. However, should you have any
questions or find any errors, please contact your nearest Yokogawa representative as listed on the back cover of this manual.
Trademarks
IBM PC/AT is a registered trademark of International Business Machines Corporation.
Disk No. BA02
5th Edition : April 2010 (YK)
All Rights Reserved, Copyright © 1997, Yokogawa Electric Corporation
When Product Is Delivered to You
Please check the contents of the package. If the wrong instrument or accessories have been delivered, if some accessories are
missing, or if they appear abnormal, contact the dealer from whom you purchased them. At that time, please give the dealer the
model name, suffix code, and serial number found on the name plate attached at the rear of the product.
1.
Safety Precautions
Be sure to follow the instructions and requirements on safety described in this manual when handling the product. If this
instrument is used in a manner not specified in this manual, the protection provided by this instrument may be impaired.
Yokogawa Electric Corporation assumes no liability for the customer's failure to comply with those instructions and require-
ments.
WARNING
Describes precautions that should be observed to prevent the danger of serious injury or death to the
user.
CAUTION
Describes precautions that should be observed to prevent the danger of minor or moderate injury to the
user, or the damage to the property.
<Note>
Provides information that is important for proper operation of the instrument.
The following symbols are used on this instrument.
To avoid injury, death of personnel or damage to the instrument, the operator must refer to an explanation in the
Instruction Manual.
Direct current
WARNING 1. Precautions Against Explosion
Do not operate the instrument in the presence of flammable or explosive gases or vapors since this
instrument is not explosion-proof. Operation of the instrument in such an environment constitutes
a safety hazard.
2. High-pressure Gases
• Use a measuring tube and pressure connector rigid enough to withstand the pressure being
measured.
• Check the measuring tube, pressure connector and their joints to ensure that there is no leaking
of the fluid being measured or separation in the joints. Any such leakage or separation can be
hazardous to personnel or equipment near the instrument because of the pressure. Exercise due
care since the greater the pressure is, the greater the risk will be.
3. Connection of AC Power
Confirm that the POWER switch is off before plugging in the power cord.
4. Protective Grounding for AC Power Supply
To prevent electrical shock, use only the power cord supplied by YOKOGAWA. Connect the
power cord to a grounded AC outlet. Use a power cord whose rated voltage complies to the rated
voltage of the instrument. Do not use an extension cord that does not have protective grounding.
5. Do not use any AC power supply other than the power supply kit(model 366969) manufactured by
YOKOGAWA.
CAUTION
1. Do not apply a pressure exceeding the specified maximum allowable input. It may damage the
instrument. (For the maximum allowable input, see Chapter 7, "Specifications.")
2. Avoid measuring the pressure of a corrosive gas, hot fluid (50
°
C or higher), liquid, or mixture of a
gas and liquid.
3. Internal condensation may occur if the instrument is moved to another place where both ambient
temperature and humidity are higher, or if the room temperature changes rapidly. In such cases
acclimatize the instrument to the new environment for at least one hour before starting operation.
4. If exposed to direct sunlight, the instrument heats up to temperatures higher than the surrounding
air. Do not use the instrument in a location exposed to direct sunlight.
5. When tightening the connector to the input port, do not place only one spanner on the connector.
It may damage the internal piping of the instrument. Use two spanners: one to hold onto the
flattened portion of the input port and another to hold the connector. Then, tighten the connector to
the input port.
6. Remove the batteries when they have run out or when not using the instrument for a long time.
Leaving them installed may result in a failure due to leakage of battery acid.
7. Keep the instrument away from volatile chemicals and do not allow a rubber or vinyl product to
come into contact with the case or operation panel. It may result in discoloration.
8. Do not remove the cover from the instrument. When the instrument needs internal inspection or
adjustment, contact your dealer or the nearest Yokogawa representative as listed on the back
cover of this manual.
9. If you notice smoke or unusual odors coming from the instrument, immediately stop using it. Con-
tact your dealer or the nearest Yokogawa representative.
2.
Parts and Their Functions
Zero-adjuster screw
(use the hexagon
wrench included
in the accessories)
RANGE 130kPa
kPa
INPUT
500kPa Max
HOLD
POWER
BATTERY
ALARM
MINI MANOMETER
Pressure input port
HOLD status
LED
Battery cover
Battery cover screw
Display
HOLD (measurement
holding) key
POWER switch
Rubber cover
(one end attached
to the case)
Battery alarm
LED
Connector for AC adapter
RS-232-C interface
connector
When rubber cover is closed
When rubber cover is open
3.
Before Starting Measurement
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Ambient Temperature and Humidity (See CAUTION 3 and 4)
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The instrument must be used only where the following conditions are met:
• Ambient temperature: 5 to 40
°
C
• Ambient humidity: 20 to 80 % RH
No condensation is allowed.
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Do NOT use the instrument in the following places:
• Near heat sources
• Where an excessive amount of soot, steam, or dust is present
• Where corrosive gases may be present
• Near strong magnetic field sources
• Near high-voltage equipment or power lines
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Power (See WARNINGS 3 and 4)
This instrument can be driven by either AA-size batteries or AC power through the dedicated AC adapter. When the batteries
have nearly run out, the battery alarm LED lights up.
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Installing the batteries
(1) Turn off the power.
(2) Use a coin or a tool with a screwdriver-like tip to loosen the screw
holding battery cover and detach the cover.
(3) Replace all four batteries with new ones. Note the polarity of each
battery when installing the new ones. Make sure that they are all in-
stalled correctly, as shown on the holder.
(4) Put the cover back in its original position and tighten the screw.
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Connecting the AC adapter (See CAUTION 10)
(1) Turn off the power.
(2) Plug the AC adapter cable into the connector of the instrument.
(3) Plug the power cord into the AC adapter and then plug the other end of
the cord into an AC outlet.
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Input Connection Procedure (See CAUTION 5)
This item takes the optional connector assembly (B9310RR) as an example
in explaining how to connect a pressure-leading tube to the input port.
(1) Wind duct tape tightly around the connector to prevent leakage.
(2) Tighten the connector firmly to the input port (Rc1/4 female) to pre-
vent leakage.
(3) Insert the tip of the pressure leading tube through the opening of the
nut and then insert the sleeve at the tip of the tube. Firmly fix the
sleeve to the tube with the nut. Finally screw the nut into the connec-
tor.
4.
Measuring the Pressure (See WARNINGS 1 and 2 and CAUTIONS 1 and 2)
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Power On/Off and Behavior at Power-on
Pressing the POWER key on the front panel turns on the power. Pressing it again turns the power off. Immediately after the
power is turned on, all display elements appear on the LCD panel and the instrument is then ready for measurement.
<Note>
Sometimes the display may enter the hold mode at power-on. If this occurs, press the HOLD key to cancel the mode
before you begin operating the instrument.
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Zero Calibration (Zero CAL)
Compensation for effects resulting from variations in temperature and/or the installation environment in order to carry out
precision pressure measurements is called "zero calibration" (zero CAL). This feature may not be necessary in regular mea-
surements (measurements in a horizontal position). It is advisable, however, that you use the zero-CAL function to measure
pressure with better accuracy. Also activate the zero-CAL function, once in a while, if your operating environment is likely to
vary during continuous measurement.
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Implementing Zero Calibration Manually
1)
Set the input to open atmosphere.
2)
Lift the left end of the zero-CAL cover.
3)
Using the supplied Allen wrench, adjust the zero-CAL control so the display reads 0.
The reading increases as you turn the control clockwise, and decreases as you turn it counterclockwise.
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Implementing Zero Calibration Via Communication
1)
Set the input to open atmosphere.
2)
Send a zero-calibration command from a personal computer (see "Programming" in Chapter 5, "Communication Func-
tions," for details on commands).
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Holding a Measurement
Use the HOLD key to hold an indicated measurement. The indication will not be updated until the HOLD mode is released.
Pressing the HOLD key stops updating an indicated measurement and the LED beside the HOLD key lights up. Pressing the
HOLD key again restarts updating and the LED turns off.
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Behavior Upon Error
An error code (Er.xx) corresponding to the cause of an error is displayed on the LCD panel. (For error codes, see "Trouble-
shooting" in Chapter 6, "Maintenance and Calibration.")
5.
Communication Function
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Communication Data
Transmission: measured data
reception: zero calibration
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RS-232-C Interface Specifications
Electric characteristic : Conforms to EIA RS-232-C
Connection : Point-to-point
Communications : Half-duplex
Synchronization : Start-stop system (asynchronous)
Baud rate : 1200 bps
Start bit : 1 (fixed)
Data length : 8 bits
Parity : No (off)
Stop bit : 1 bit
Connector : DELC-J9PAF-13L6 from JAE (or the equivalent)
Hardware and software handshaking: None
Receive buffer size : 37 bytes
+
–
+
–
Input port
(Rc1/4 or NPT1/4)
Sleeve
Nut
For screwing
Fixed
Fixed
For loosening
Connector