User’s
Manual
Yokogawa Electric Corporation
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EJA Series Differential Pressure and
Pressure Transmitters
Installation Manual
IM 01C22A01-01E
IM 01C22A01-01E
2nd Edition
CD-ROM included
1. Introduction
1.1 For Safe Use of Product ..............................................2
1.2 Warranty ......................................................................2
1.3 ATEX Documentation ..................................................4
2. Handling Cautions
2.1 Model and Specifi cations Check .................................5
2.2 Selecting the Installation Location ..............................5
2.3 Pressure Connection ..................................................6
2.4 Installation of Explosion Protected Type .....................6
2.5 EMC Conformity Standards ..................................... 13
2.6 PED (Pressure Equipment Directive) ...................... 13
2.7 Low Voltage Directive ............................................... 14
3. Installation
3.1 Mounting................................................................... 15
3.2 Mounting the Diaphragm Seals ............................... 15
3.3 Diaphragm Seals Installation Consideration ............ 16
3.4 Affi xing the Tefl on Film ............................................. 17
3.5 Rotating Transmitter Section .................................... 18
3.6 Changing the Direction of Integral Indicator............. 18
4. Installing Impulse Piping
4.1 Impulse Piping Installation Precautions ................... 19
4.2 Impulse Piping Connection Examples ..................... 21
4.3 Process Piping Installation Precautions ................... 22
5. Wiring
5.1 Wiring Precautions ................................................... 23
5.2 Connections of External Wiring to Terminal Box ...... 23
5.3 Wiring ....................................................................... 23
5.4 Grounding ................................................................ 25
5.5 Power Supply Voltage and Load Resistance ........... 25
6. Operation
6.1 Preparation for Starting Operation ........................... 26
6.2 Zero Point Adjustment .............................................. 27
7. Errors and Countermeasures
8. Parameter Summary
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