Yokogawa EJX530B - Manual (Page 62)

<9. Maintenance>
9-3
IM 01C27F01-01EN
P
Reference pressure
Pressure generator
Supply pressure
P
Reference pressure
Precision digital manometer
Pressure source
Using pressure
generator
Using pressure source
with manometer
F0901.ai
Figure 9.1 Instrument Connections
9.4 Disassembly and
Reassembly
CAUTION
Precautions for the intrinsic safety explosion
prevention type instrument
Intrinsic safe type transmitters must be, as
a rule, removed to a non-hazardous area
for maintenance and be disassembled and
reassembled to the original state. Check and
confirm the insulation when it is reassembled to
the original state.
Check and confirm the insulation when it is
reassembled to the original state.
Refer to section 2.7 “Insulation Resistance and
Dielectric Strength Test” for details of Resistance
Test.
IMPORTANT
• Perform the provisioning when replacing the
RF assembly. Refer to 7.4 Connecting to the
Field Wireless Network for details.
• Replace the batteries and perform the
parameter settings when replacing the CPU
assembly. Refer to 9.4.6 Replacing the
Batteries.
This section describes procedures for disassembly
and reassembly for maintenance and component
replacement.
CAUTION
Always remove Battery pack and shut off
pressures before disassembly and assembly.
Use proper tools for all operations.
Table 9.2 shows the tools required.
Table 9.2 Tools for Disassembly and Reassembly
Tool Quantity Remarks
Phillips
screwdriver
1 JIS B4633, No. 2
Slotted
screwdriver
1
Allen wrenches 3 JIS B4648
One each, nominal 3,
4 and 2.5 mm Allen
wrenches
Wrench 1 Width across flats, 17 mm
Torque wrench 1
Adjustable
wrench
1
Socket wrench 1 Width across flats, 16 mm
Socket driver 1 Width across flats, 5.5 mm
Tweezers 1