Sensor service instructions, Model ph87 retraction sensor assembly, Continued) – Yokogawa pH/ORP Retractable PH97 User Manual
Page 13: Sensor service instructions (continued)
13
IM M1263JL-A
CONTINuE SErVICING OF ThE mODEL Ph97 SENSOr By FOLLOwING ThE STEP-By-STEP INSTruCTIONS
[E] ThrOuGh [G] IN OrDEr AS ShOwN BELOw:
Sensor Service Instructions (Continued)
Model PH87 Retraction Sensor Assembly
11
Sensor Service Instructions
(Continued)
9
[Step G]. TO TEST SENSOR PERFORM A 2-POINT
CALIBRATION WITH pH BUFFER AS SHOWN BELOW.
IF THE SENSOR TESTS WITHIN ACCEPTABLE
LIMITS REINSTALL AND PLACE SENSOR BACK
IN SERVICE BY FOLLOWING ASSEMBLY
INSTRUCTIONS.
IF TESTING PROVES SENSOR T0 BE FAULTY
CONTINUE WITH THE SERVICE INSTRUCTIONS
FOR SENSOR REPLACEMENT.
[STEP E]. REMOVE STAGE #1
ASSEMBLY FROM VALVE ASSEMBLY.
WITH THE STAGE #1 SUBASSEMBLY
COMPLETELY REMOVED FROM THE
VALVE ASSEMBLY THE SENSOR MAY
NOW BE TESTED OR REPLACED.
[STEP F]. BEFORE TESTING THE
SENSOR BE SURE THAT IT IS CLEAN
[STEP G]. TO TEST SENSOR PERFORM A
2-POINT CALIBRATION WITH PH BUFFER AS
SHOWN BELOW.
IF THE SENSOR TESTS WITHIN ACCEPTABLE
LIMITS REINSTALL AND PLACE SENSOR
BACk IN SERVICE BY FOLLOWING ASSEMBLY
INSTRUCTIONS.
IF TESTING PROVES SENSOR T0 BE FAULTY
CONTINUE WITH THE SERVICE INSTRUCTIONS
FOR SENSOR
REPLACEMENT.