Rosemount Oxymitter 4000, Инструкционный бюллетень

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IB-106-340
5-14
DIAGNOSTIC
ALARMS
TEST
POINTS
HEATER T/C
HEATER
O2 CELL
CALIBRATION
CALIBRATION RECOMMENDED
O2 CELL mV +
O2 CELL mv -
HEATER T/C +
HEATER T/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
22220044
Figure 5-12. Fault 12, Invalid Slope
l. Fault 12, Invalid Slope. The CALIBRATION
LED flashes once, pauses for three seconds, and
repeats (Figure 5-12).
1. During a calibration, the electronics
calculates a slope value. If the value of the
slope is less than 35 mV/deg or more than
52 mV/deg, the slope alarm will be active
until the end of the purge cycle.
2. See paragraph 6-2, Calibration. Verify the
calibration by carefully repeating it. Ensure
the calibration gases match the calibration
gas parameters. If you attach a multimeter to
TP1+ and TP2-, sample gas measurements
are:
8% O
2
≈
23 mV
0.4% O
2
≈
85 mV
3. Power down the Oxymitter 4000 and
remove it from the stack.
4. Replace the cell per paragraph 6-8, Cell
Replacement.