HARDWARE
VF8 DELTA/DELTA XL/KAPPA 18-9
6. Press the Start/Stop key ( ) on the calibration unit to start the flow of gas,
checking the gauge reading on the front of the unit to verify an adequate gas
supply.
7. Access the tpO
2
/CO
2
setup menu.
8. Click on
Start Calibration.
or
— Press and hold the calibration key on the front of the tpO
2
/CO
2
pod for
two seconds.
— Calibration information appears on the right side of the menu. The moni-
tor sounds a tone when calibration is complete.
9. Remove the sensor from the calibration chamber, holding it away from
sources of CO
2
. The monitor performs a final response test of the CO
2
sensor.
If the calibration is successful, the date and time of the calibration are displayed on the
tpO
2
/CO
2
menu, and the site timer, once it is enabled, starts counting down the timed
monitoring session.
Calibration typically takes 3 to 5 minutes. The monitor performs the following
functional checks:
— Temperature Test — Turns on the sensor heater and verifies the sensor heats
to the set temperature (±0.05 °C) within 3 minutes
— Range Test — Verifies the sensor produces voltages within acceptable ranges
when exposed to the reference gas
— Stability Test — Verifies the sensor produces stable voltages for at least 1
minute after exposure to the reference gas
NOTE: The calibration unit automatically cuts off the flow of reference gas after 20
minutes, but the gas flow can be stopped before that by pressing the
Start/Stop key.
NOTE: If you do not remove the sensor within 30 minutes after the start of
calibration, the sensor heater switches off and a new calibration is required.
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