IB-106-340
3-6
3-4.
POWER UP.
a.
Startup Display. When power is applied to the
probe, the cell heater turns on. It takes approx-
imately one half hour for the cell to heat to operat-
ing temperature. This condition is indicated by the
top four LEDs (DIAGNOSTIC ALARMS) on the
membrane keypad (Figure 3-3). Starting with the
CALIBRATION LED, the LEDs light in ascend-
ing order until all four LEDs are on. At this point,
all four turn off and the cycle starts again. This
ramp cycle continues until the cell is up to operat-
ing temperature.
b.
Operating Display. The ramp cycle turns into a
cycle where the diagnostic LEDs light in se-
quence from the top to the bottom, one at a time.
After the bottom LED turns on, the sequence
starts again at the top with the HEATER T/C
LED (Figure 3-3).
c.
Error. If there is an error condition at startup,
one of the diagnostics LEDs will be blinking. Re-
fer to Section V, TROUBLESHOOTING, to de-
termine the cause of the error. Clear the error,
cycle power, and the operating display should
return.
d.
Keypad. The five membrane keys on the
membrane keypad are only used during calibra-
tion to adjust the high and low gas and to initiate
the calibration sequence (Figure 3-4).
3-5.
START UP OXYMITTER 4000 CALIBRA-
TION. Refer to Section VI, MAINTENANCE AND
SERVICE, for calibration instructions.
3-6.
IMPS 4000 CONNECTIONS. See the IMPS 4000
Intelligent Multiprobe Test Gas Sequencer Instruction
Bulletin for wiring and pneumatic connections.
DIAGNOSTIC
ALARMS
TEST
POINTS
HEATER T/C
HEATER
02 CELL
CALIBRATION
CALIBRATION RECOMMENDED
02 CELL mV +
02 CELL mv -
HEATER T/C +
HEATER T/C -
INC
INC
DEC
DEC
HIGH
GAS
LOW
GAS
CAL
TEST GAS +
PROCESS -
% 02
MEMBRANE
KEYS
MEMBRANE
KEYS
MEMBRANE
KEY
DIAGNOSTIC
LEDS
22220023
Figure 3-4. Calibration Keys
Summary of Contents for Oxymitter 4000
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