Yokogawa pH/ORP Retractable PH97 - Manual (Page 14)

14
IM M1263JL-A
Sensor replacement Instructions
BEFOrE SErVICING rEmOVE ThE mODEL Ph87 SENSOr FrOm SErVICE FOLLOwING ThE STEP-By-STEP
INSTruCTIONS [A] AND [D] IN OrDEr AS ShOwN BELOw:
12
Model PH87 Retraction Sensor Assembly
Sensor Replacement Instructions
TO DISASSEMBLE THE MODEL PH87 SENSOR WITH A SENSOR MOUNTED JUNCTION BOX,
FOLLOW THE STEP-BY-STEP INSTRUCTIONS [A] THROUGH [D] IN ORDER AS SHOWN BELOW:
[Step A]. REMOVE
JUNCTION BOX COVER AND DISCON-
NECT ALL WIRES FROM TERMINALS.
[Step C]. WHILE FIRMLY GRIPING
SHEATH PUSH ON COUPLER TUBE -
JUNCTION BOX ASSEMBLY TO
UNSEAT SENSOR O-RINGS
[Step B]. WHILE FIRMLY GRIPING
THE SENSOR AND THE SHEATH AT
THE SAME TIME UNTHREAD THEM
FROM THE COUPLER ASSEMBLY BUT
DO NOT COMPLETELY DISENGAGE
THREADS.
[Step D]. COMPLETELY UNTHREAD
SENSOR FROM COUPLER TUBE
ASSEMBLY.
CONTINUE WITH SERVICE
INSTRUCTIONS AT STEP "N".
[STEP A]. REMOVE
JUNCTION BOX COVER AND DISCONNECT
ALL WIRES FROM TERMINALS.
[STEP B]. WHILE FIRMLY GRIPING
THE SENSOR AND THE SHEATH AT
THE SAME TIME UNTHREAD THEM
FROM THE COUPLER ASSEMBLY BUT
DO NOT COMPLETELY DISENGAGE
THREADS.
[STEP D]. COMPLETELY UNTHREAD
SENSOR FROM COUPLER TUBE
ASSEMBLY.
CONTINUE WITH SERVICE
INSTRUCTIONS AT STEP “N”.
[STEP C]. WHILE FIRMLY GRIPING SHEATH
PUSH ON COUPLER TUBE JUNCTION BOX
ASSEMBLY TO UNSEAT SENSOR O-RINGS