Yamatake Corporation Maintenance and Troubleshooting
ST3000 Smart Transmitter Series 900 Electronic Differential Pressure/Pressure Transmitter 7-9
7-3 : Disassembly and Assembly
7-3-1 :Before You Start
WARNING
• Never open the case cover while the transmitter is ON or in a hazardous location.
• Handle the explosion-proof transmitter with care. It may lose its explosion-proof
performance due to corrosion, deformation, damage to the case cover, or damage
to a screw or a joined part.
• The explosion-proof performance of the special explosion-proof pressure transmit-
ter is not guaranteed unless it is LOCKED. Always tighten the case cover com-
pletely, and lock the case cover.
Dismounting and mounting the case cover
This transmitter has a locking structure. Before dismounting the case cover, unlock the
mechanism using a hexagonal wrench (included).
When remounting, insert the case cover fully and lock it, using a hexagonal wrench.
CAUTION
After mounting the case cover, make sure that no dust or rain gains ingress into the
transmitter case.
Figure 7-1 Locking Case Cover
Lock
Case cover
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