ABB STT04 Instruction Manual page 225

Table N-1. Problem Codes of TB82 Transmitter
Code Description
HI.PV PV above transmitter range Verify process conditions are within transmitter range. PV must
HI.R.CKT Reference impedance
circuit failure - high range
error
HI.REF.Z High reference electrode
impedance
HI.RZ.AD Reference impedance
above transmitter A/D range
HI.T.AD Open or missing
temperature sensor
Corrective Action
be within transmitter range.
Verify sensor wiring connections.
Verify sensor does not have any exposed wire from nicks, etc. If
it does, repair (if possible) or replace.
Remove any liquids, oils, scales or corrosion from transmitter ter-
minal block or extension cable junction box terminals.
Verify sensor responds to pH buffers. Replace sensor and/or
sensor extension cable (if present) if sensor does not respond.
Electronically test sensor (refer to the product instruction).
Replace if it does not meet requirements.
Verify sensor wiring connections.
Verify reference is clean. Remove any foreign material.
Clean sensor and verify it responds to pH buffer. Replace sensor
if it does not respond.
Change configuration to increase reference impedance limit if
sensor is functioning properly in buffers and is in final installed
location.
Input PCB reference impedance circuit failure exists. Disable
diagnostics and order replacement input PCB assembly. Existing
input PCB assembly should properly function until new assembly
is received.
Verify sensor wiring connections.
Verify reference is clean. Remove any foreign material.
Clean sensor and verify it responds to pH buffer. Replace sensor
if it does not respond.
Change configuration to increase reference impedance limit if
sensor is functioning properly in buffers and is in final installed
location.
Input PCB reference impedance circuit failure exists. Disable
diagnostics and order replacement input PCB assembly. Existing
input PCB assembly should properly function until new assembly
is received.
Verify process conditions are within transmitter range. PV must
be within transmitter range.
Verify process conditions are within configured output range. If
PV is outside configured range, increase output range.
Verify sensor wiring connections.
Remove any liquids, oils, scales or corrosion from transmitter ter-
minal block or extension cable junction box terminals.
Clean sensor and perform a buffer and process calibration.
Conduct temperature calibration. If not using temperature sen-
sor, verify configuration for TMP.SNS is NONE.
Electronically test sensor and temperature compensator (refer to
the product instruction). Replace sensor if it does not meet
requirements.
Replace pH/ORP/pION input PCB assembly.
PROBLEM AND ERROR CODES (TB82)
TB82 TRANSMITTER
(continued)
N - 19