46
FIELD CALIBRATION
6. Connect the tubing from the regulator to the
instrument inlet nozzle.
7.
Wait for the instrument gas to settle.
8.
If the displayed reading does not correspond to the
concentration of calibration gas, by pressing the
appropriate soft-key, the displayed gas value can
be altered until the gas value corresponds to the
concentration of calibration gas.
9.
When the gas value corresponds to the concentration
of calibration gas, disconnect the tubing from the
instrument and the regulator from the gas cylinder.
Replace the cap on the calibration gas cylinder.
10. Press
B2
to change range and calibrate with another
gas. Follow steps 4 - 9 for each range.
11. Press
B1
‘End’ when all required ranges have been
calibrated.
12. At this point to save the calibration ranges, press
B1
.
To exit fi eld calibration without saving the calibration
results, press
B2
.
To return to fi eld calibration mode, press
B4
.
Press
B3
to increase
the display reading
Press
B4
to decrease
the display reading
