YOKOGAWA EJX Series User Manual

User's
Manual
EJX and EJA-E Series
Differential Pressure and
Pressure Transmitters
Installation Manual
Contents
1. Introduction
1.1
1.2
1.3
2. Handling Cautions
2.1
2.2
2.3
2.4
2.5
2.6
2.7
3. Installation
3.1
3.2
3.3
3.4
3.5
3.6
3.7
4. Installing Impulse Piping
4.1
4.2
4.3
5. Wiring
5.1
5.2
5.3
5.4
5.5
5.6
6. Operation
6.1
6.2
7. Errors and Countermeasures
8. Parameter Summary
CD-ROM included
IM 01C25A01-01E
For Safe Use of Product . .............................................2
Warranty . .....................................................................3
ATEX Documentation . .................................................4
Model and Specifications Check . ................................6
Selecting the Installation Location ..............................6
Pressure Connection ..................................................6
Installation of an Explosion-Protected Instrument ......6
EMC Conformity Standards ..................................... 15
Pressure Equipment Directive (PED) ...................... 16
Low Voltage Directive . .............................................. 17
Mounting................................................................... 18
Mounting the Diaphragm Seals ......................................18
Diaphragm Seals Installation Consideration . ........... 19
Mounting the Flushing Connection Ring . ................. 20
Affixing the Teflon Film ............................................. 21
Rotating Transmitter Section . ................................... 22
Changing the Direction of Integral Indicator............. 22
Impulse Piping Installation Precautions ................... 23
Impulse Piping Connection Examples ..................... 25
Process Piping Installation Precautions (EJ115) 2 6
Wiring Precautions ................................................... 28
Connections of External Wiring to Terminal Box . ..... 28
Wiring ....................................................................... 30
RTD Cable Connection (EJX910A/EJX930A) . ........ 31
Grounding ................................................................ 34
Power Supply Voltage and Load Resistance . .......... 34
Preparation for Starting Operation ........................... 35
Zero Point Adjustment . ............................................. 36
IM 01C25A01-01E
7th Edition
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