User guide

I-E67-84-1B February,2002 13-2
The occurrence of a Problem Code fault
condition triggers the Fault icon to energize,
the Spike output to modulate (if configured),
and a Diagnostic Relay Output to energize (if
configured). These diagnostic indicators
provide local and remote reporting capability.
Tables 13-1 and 13-2 contain all the Problem
Codes supported by the TB84PH Advantage Series
analyzer. Each entry lists the Problem Code
number, displayed text string, and a short
description of the fault. See Section 14,
Troubleshooting, for resolving a fault
condition.
Table 13-1. Common Problem Code Definitions
Problem Text Description
Codes String
PC1 LO.GLS.Z Low pH measuring electrode impedance.
PC2 HI.REF.Z High reference electrode impedance.
PC4 GND LP Ground Loop present or shorted sensor cable.
PC5 OPEN Open sensor cable or sensor out of solution.
PC6 HI.AO1 Analog Output One above upper range value (+0.4 mA
Hystersis).
PC7 LO.AO1 Analog Output One below lower range value (-0.2 mA
Hystersis). Fault only applicable for 4-20 mA
configurations.
PC8 HI.PV Process Variable above analyzer range.
PC9 LO.PV Process Variable below analyzer range.
PC10 HI.TEMP Temperature above analyzer range.
PC11 LO.TEMP Temperature below analyzer range.
PC12 HI.T.AD Open or missing temperature sensor.
PC13 LO.T.AD Shorted temperature sensor.
PC14 +HI.OFF Large positive sensor offset (greater than 180 mV).
PC15 -HI.OFF Large negative sensor offset (less than -180 mV).
PC16 HI.EFF High sensor efficiency (greater than 110%).
PC17 LO.EFF Low sensor efficiency (less than 60%).
PC18 HI.AO2 Analog Output Two above upper range value (+0.4 mA
Hystersis).
PC19 LO.AO2 Analog Output Two below lower range value (+0.4 mA
Hystersis). Fault only applicable for 4-20 mA
configurations.
Table 13-2. Uncommon Problem Code Definitions
Problem Text Description
Codes String
PC20 BAD.SEE Bad Serial EEPROM or pH/ORP/pION Input PCB Assembly.