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2.4 CALIBRATE
Fig. 2.11 Calibration Screen
If ppm Methane (CH
4
) is to be calibrated, it is important
that it is calibrated first. After this, the order of calibration
is not important.
Refer to CALIBRATION GAS CONCENTRATIONS
Instruction Sheet (Part No.13939) for details of gases
required by instrument type. Calibration gas must be
applied at the instrument probe inlet. The correct calibration
gas regulator should be used.
The gas will flow through the instrument and exit at the
instrument rear outlet. Refer to USE OF BALANCED FLOW
REGULATOR VALVE Instruction Sheet (Part No.99104)
for details of gas concentration and flow rate to be used.
2.4.1 Ranges
All the ranges for the sensors in this instrument can be
calibrated, excluding Oxygen (O
2
) which calibrates
automatically on zeroing.
Note: Oxygen is shown for viewing purposes only.
2.4.2 Test Gas
The concentrations set for the previous calibration will be
shown. If the concentrations, in the cylinder you intend to
use this time, are different then you need to change the
values.
FIELD CALIBRATION
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