Figure 5-7. Fault 7, High Case Temp - Emerson Oxymitter 5000 Instruction Manual

Oxymitter 5000
DIAGNOSTIC
ALARMS
CALIBRATION RECOMMENDED
TEST
POINTS
INC INC
HIGH LOW
GAS GAS
DEC DEC

Figure 5-7. Fault 7, High Case Temp

Rosemount Analytical Inc. A Division of Emerson Process Management
HEATER T/C
HEATER SW2
O2 CELL
CALIBRATION
J1
O2 CELL mV +
TP1
O2 CELL mv -
TP2
HEATER T/C +
TP3
HEATER T/C -
TP4
CAL
TEST GAS + TP5
PROCESS -
TP6
% O2
28550019
Instruction Manual
g. Fault 7, High Case Temp
The HEATER LED flashes three times,
pauses for three seconds, and repeats (Fig-
ure 5-7).
1. If the case temperature exceeds 185°F
(85°C), the temperature control will
shut off and a fieldbus alarm will be
sent.
2. This signifies that the environment
where the Oxymitter 5000 is installed
exceeds the ambient temperature re-
quirements or that heat due to convec-
tion is causing case temperature to rise
above the limit.
3. Placing a spool piece between the
stack flange and the Oxymitter 5000
flange may eliminate this problem.
4. If a spool piece does not solve the
problem, relocation is the only solution.
IB-106-350 Rev. 1.2
April 2001
Troubleshooting 5-9
5