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PART FOUR - SERVICE AND MAINTENANCE
SECTION 3 - TROUBLESHOOTING
Model P63 pH Analyzer
Rev. 7-1201
104
For GLI Differential Technique Sensor
A.
Connect a millivolt generator (or a jumper, if gen-
erator is not available) between Terminal 4 (red)
and Terminal 5 (green) on TB1, with the (+) lead on
Terminal 4.
B.
Connect a 1%, 301 ohm resistor between Terminal
5 (green) and Terminal 8 (yellow) on TB1.
C. Connect a jumper between Terminal 3 (black) and
Terminal 5 (green) on TB1.
D. Make sure the analyzer is configured for a 300 ohm
NTC temperature element (see PART THREE,
Section 5.5 for details).
For Conventional Combination Electrode
A.
Connect a millivolt generator (or a jumper, if gen-
erator is not available) between Terminal 1 (active)
and Terminal 7 (ground) on TB1, with the (+) lead
on Terminal 1.
B.
Connect a 1%, 1K ohm resistor between Terminal 8
and Terminal 10 on TB1.
C. Connect a jumper between Terminal 3 (reference)
and Terminal 7 (ground) on TB1.
D. Make sure the analyzer is configured for a Pt 1000
temperature element (see PART THREE, Section
5.5 for details).
3.
Reconnect line power to the analyzer.
WARNING:
LINE POWER IS PRESENT. BE CAREFUL TO
AVOID ELECTRICAL SHOCK.
4.
Set the millivolt generator to provide each of the fol-
lowing outputs, checking the analyzer MEASURE
screen each time for these corresponding pH readings:
Generator Output
Corresponding Analyzer pH Reading
Zero mV
7 pH (approximately
(-) 175 mV
10 pH (approximately
(+) 175 mV
4 pH (approximately
When Using Jumper Only (not generator)
- - - -
7 pH (approximately
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