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YOKOGAWA MT10 Instruction Manual

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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.

● The contents of this manual are subject to change without prior notice.

● 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.

● 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

■ Ambient Temperature and Humidity (See CAUTION 3 and 4)

● 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.

● 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

■ 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.

● 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.

● 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.

■ 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)

■ 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.

■ 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.

● 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.

● 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).

■ 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.

■ 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

■ Communication Data

Transmission: measured data

reception: zero calibration

■ 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