Table of Contents
Advertisement
Manual
00809-0500-4881
Potential cause
Loose or open O
Recommended actions
Potential cause
O
cell degraded or failed.
2
Recommended action
Check O
interface (LOI) (see
•
•
•
9.3.2
Ref Current Err
Resistance temperature device (RTD) excitation current error. Reference current should be
5.02 mA.
Potential cause
Loose or open lead or circuit wire connection for COe sensor or cold junction connector
(CJC) sensor current loop.
Recommended actions
Potential cause
COe sensor grounded.
Recommended actions
Potential cause
COe sensor failed.
Recommended actions
Potential cause
CJC sensor grounded.
Rosemount OCX8800C
cell circuit connection.
2
1. Check O
cell circuit wires for breaks or loose connections.
2
2. Repair lead wire breaks or loose connections.
cell impedance by reading the O
2
Figure
4-4) or the O
If cell impedance is zero, replace O
If cell impedance is less than 5000 ohms, check for cell housing ground fault. Repair
ground fault.
If cell impedance is greater than 5000 ohms and no ground fault is indicated,
replace O
cell with cell replacement kit.
2
1. Check all COe and CJC sensor current loop wiring per
10-18.
2. Correct wiring faults.
1. Check resistance of COe sensor leads to ground per
2. Replace COe sensor if resistance is less than 10M ohms.
1. Check resistance of both COe sensor elements per
2. Replace COe sensor if resistance of sensor element is not between 100 and 250
ohms.
Cell Imped value via the local operator
2
Snsr R value via HART
®
2
cell with cell replacement kit.
2
Figure 9-2
Figure
Figure
Troubleshoot
April 2023
(see
Figure
5-2).
and
Figure
10-18.
10-18.
187
Advertisement
Table of Contents
