User guide

I-E67-84-1B February,2002 14-1
SECTION 14 - TROUBLESHOOTING
INTRODUCTION
This section provides troubleshooting
information for the TB84PH Advantage Series
analyzer and associated sensor. Using Table
14-1, problem and error conditions can be
identified and the corrective action for these
conditions can be tested. Refer to Section
13, Diagnostics, for descriptions of problem
and error code conditions.
ANALYZER TROUBLESHOOTING
Table 14-1. Analyzer Troubleshooting Guide
Problem Problem Corrective Action
Code Text
String
PC1 LO.GLS.Z 1) Verify sensor wiring is properly connected.
2) Verify glass electrode is intact. Replace sensor
if glass electrode is broken.
3) Remove any liquids, oils, scales or corrosion from
TB84PH terminal block or extension cable junction
box terminals. Replace extension cable if
corrosion is present.
4) Verify sensor responds to pH buffers. Replace
sensor if sensor does not respond.
5) Change configuration to proper analyzer type if
sensor is not a glass pH sensor.
PC2 HI.REF.Z 1) Verify sensor wiring is properly connected.
2) Verify reference is clean. Remove any foreign
material. See Section 14, Maintenance.
3) Clean sensor then verify sensor responds to pH
buffers. Replace sensor if sensor does not
respond.
4) Change configuration to increase reference
impedance limit if sensor is functioning properly
in buffers and in the final installed location.
PC4 GND LP 1) Verify sensor wiring is properly connected.
2) Verify sensor does not have any exposed wires from
nicks or equivalent. Repair if possible or
replace.
3) Remove any liquids, oils, scales or corrosion from
TB84PH terminal block or extension cable junction
box terminals. Replace extension cable if
corrosion is present.
4) Verify sensor responds to pH buffers. Replace
sensor and/or sensor extension cable (if present)
if sensor does not respond.
5) Electronically test sensor. Replace sensor if
sensor does not meet requirements.
PC5 OPEN 1) See PC4 corrective actions.