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Instruction Manual
IM-106-340, Rev. 4.0
May 2006
5-3
Oxymitter 4000
Figure 5-2. Calibration Keys
Keys
INC and DEC. The INC and DEC keys are used to set the values of the
calibration gases. Attach a multimeter across TP5 and TP6. The calibration
and process gases can now be monitored. Pressing the INC or DEC once will
cause the output to switch from the process gas to the calibration gas.
Pressing INC or DEC a second time will increase or decrease the calibration
gas parameter. If the keys have been inactive for one minute, the output
reverts to the process gas. When a calibration has been initiated, the value at
TP5 and TP6 is the % O
2
seen by the cell.
Oxygen levels, as seen on the multimeter, are:
8.0% O
2
= 8.0 volts DC
0.4% O
2
= 0.4 volts DC
CAL
The CAL key can:
• Initiate a calibration.
• Sequence through calibration.
• Abort the calibration.
NOTE
Refer Section 9: Maintenance and Service, for calibration instructions.
Model 751 Remote Powered Loop LCD Display (Optional)
Refer to Remote Powered Loop LCD manual for calibration and operation.
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