PART FOUR - SERVICE AND MAINTENANCE
SECTION 3 - TROUBLESHOOTING
Rev. 6-501
Model P53 pH/ORP Analyzer (universal-mount 1/2 DIN)
95
Verifying Interconnect
Cable Integrity
5.
Change the MEASURE screen to show temperature:
For a GLI Differential Technique sensor, the
temperature value should be approximately “25
°
C.”
For a conventional combination electrode, the
temperature value should be approximately “0
°
C.”
If these readings are achieved, the analyzer is operating
properly, but the sensor or interconnect cable (if used) may
be inoperative. If you cannot get these readings, the ana-
lyzer is probably inoperative.
WARNING:
LINE POWER IS PRESENT. BE CAREFUL TO AVOID
ELECTRICAL SHOCK.
1.
After disconnecting line power, remove the millivolt
generator and temperature simulation resistor. (When
using a GLI Differential Technique sensor, also remove
the jumper from the analyzer TB1 terminals.)
2.
Reconnect the sensor directly to the analyzer (pur-
posely bypassing the interconnect cable and junction
box, if used).
3.
Reconnect line power to the analyzer.
4.
Use a two-point method to calibrate the analyzer. (For
ORP measurement, use the “1 POINT SAMPLE”
method described in PART THREE, Section 5.3.) If
calibration was:
•
Successful:
The analyzer and sensor are
operating properly, but the interconnect cable is
probably faulty.
•
Unsuccessful:
The sensor is probably inoperative.
