Rosemount 1054B - ORP Troubleshooting Guide

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SYMPTOM PROBLEM ACTION
Change in ORP reading (value 1. Old or coated glass electrode 1. Clean or replace glass electrode
shrinking)
ORP value locks up (no charge 1. Coated electrode 1. Replace electrode
in reading) 2. Clean electrode
1054B ORP value not the same 1. Grab sample incorrect 1. Re-evaluate sample technique
as grab sample of process and equipment
2. Unclear what is correct 2. Test with Quinhydrone or known
solution
3. 1054B out of calibration 3. Recalibrate per start-up and
calibration section
Fault code tcH/tcL 1. Miswire 1. Check wiring between the sensor
and 1054B
2. Open or shorted RTD 2. Replace RTD with new one
Fault code inH or inL 1. Open wire from preamplifier 1. Check wiring between amplifier
and 1054B
2. Bad preamplifier 2. Replace preamplifier
3. Defective CPU 3. Replace CPU PCB
Fault code Std 1. Ground loop offset (in process) 1. Check all input wiring
2. Voltage on the 1000 ft after
preamp process 2. Recheck buffer accuracy
Fault code SEn 1. Open wire between sensor 1. Repair wire
and 1054B
2. Maximum Cable length has
been exceeded 2. Check wiring
Fault code EEP 1. Defective EEPROM 1. Replace CPU PCB
Fault code CHS 1. Defective CPU 1. Replace CPU PCB
No alarm relay closure 1. Defective power card 1. Replace power PCB
2. Defective CPU 2. Replace CPU PCB
No output current 1. Defective output board 1. Replace power PCB
2. Miswire 2. Check for short
Low output current 1. Circuit loading with excessive 1. Consult output loading limits
resistance on output 1054B specs (600 ohms max)
MODEL 1054B pH/ORP SECTION 5.0
START-UP AND CALIBRATION
TABLE 8-4. Troubleshooting Guide 1054B ORP