PART FOUR - SERVICE AND MAINTENANCE
SECTION 3 - TROUBLESHOOTING
Model P33 pH/ORP Analyzer (panel-mount 1/4 DIN)
Rev. 6-1100
90
Verifying Interconnect
Cable Integrity
For a GLI 5-wire Differential Technique sensor, the
temperature value should be approximately “25
°
C.”
For a conventional combination electrode, the tem-
perature 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:
WHEN LINE POWER IS PRESENT, BE CAREFUL TO
AVOID ELECTRICAL SHOCK.
1.
After disconnecting line power, remove the millivolt
generator, temperature simulation resistor, and the
jumper from the analyzer’s 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.
WARNING:
WHEN LINE POWER IS PRESENT, BE CAREFUL
TO AVOID ELECTRICAL SHOCK.
4.
Use a two-point method to calibrate the analyzer. (For
ORP measurement, only use the “1 POINT SAMPLE”
method described in PART THREE, Section 4.3.) If
calibration was:
■
Successful:
Analyzer and sensor are operating
properly, but interconnect cable is
probably faulty.
■
Unsuccessful: Sensor is probably inoperative.
