Emerson Oxymitter 5000 Instruction Manual page 106

Oxymitter 5000
Figure 8-8. Fault 6, High High Heater Temp
DIAGNOSTIC
ALARMS
CALIBRATION RECOMMENDED
TEST
POINTS
INC
HIGH
GAS
DEC
Alarms
Very Hi O2 Temp
8-12
HEATER T/C
HEATER SW2
O2 CELL
CALIBRATION
O2 CELL mV +
TP1
O2 CELL mv -
TP2
HEATER T/C +
TP3
HEATER T/C -
TP4
INC
CAL
LOW
GAS
TEST GAS + TP5
DEC
PROCESS -
TP6
% O2
KEYPAD
LOI
Fault 6, High High Heater Temp
Figure 8-8 shows the electronic assembly for an
Oxymitter 5000 with a membrane keypad (upper
view) and an Oxymitter 5000 with an LOI (lower
view).
Membrane Keypad
When Fault 6 is detected, the HEATER LED
flashes twice, pauses for three seconds, and
repeats.
J1
1. The High High Heater Temp alarm will
activate when the thermocouple produces
a voltage of 37.1 mV [1652°F (900°C)].
2. The triac and the temperature control may
be at fault.
3. Remove power. Allow Oxymitter 5000 to
cool for five minutes. Restore power.
4. If the condition repeats, replace the
electronic assembly per "Electronic
Assembly Replacement" in Section 9:
Maintenance and Service.
LOI
When Fault 6 is detected, the LOI displays the
"Very Hi O2 Temp" message.
1. The very high O2 temperature alarm will
activate when the thermocouple produces
a voltage of 37.1 mV [1652°F (900°C)].
2. The triac and the temperature control may
be at fault.
3. Remove power. Allow the Oxymitter 5000
to cool for five minutes. Restore power.
4. If the condition repeats, replace the
electronic assembly per "Electronic
Assembly Replacement" in Section 9:
Maintenance and Service.
Instruction Manual
IM-106-350, Rev 2.2
July 2008