Instruction Manual
IB-106-340 Rev. 2.4
April, 2001
Rosemount Analytical Inc. A Division of Emerson Process Management Troubleshooting 7-9
Oxymitter 4000
DIAGNOSTIC
ALARMS
TEST
POINTS
HEATERT/C
HEATER
O2 CELL
CALIBRATION
CALIBRATION RECOMMENDED
O2 CELL mV +
O2 CELL mv -
HEATERT/C +
HEATERT/C -
INC INC
DEC DEC
HIGH
GAS
LOW
GAS
CAL
TEST GAS +
PROCESS -
% O2
SW2
TP1 J1
TP2
TP3
RED
YEL
GRN
ORG
TP4
TP5
TP6
ON
22220037
Figure 7-6. Fault 6, High High Heater Temp
f. Fault 6, High High Heater Temp
The HEATER LED flashes twice, pauses for
three seconds, and repeats (Figure 7-6).
1. The high high heater tem p alarm will
activate when the thermocouple pro-
duces a voltage of 37.1 mV
(1652°F/900°C).
2. The triac and the temper ature control
may be at fault.
3. Remove power. Allow Ox ymitter 4000
to cool for five minutes. Restore power.
4. If the condition repeats, r eplace the
electronic assembly per paragraph 6-
5b, Electronic Assembly Replacement.
7