2-13
OPERATION
2.7 VOC TARGET GAS SELECTION
This congurable option allows the user to select a different
VOC gas from that which was originally used to calibrate the
instrument.
To select a different VOC gas, press and hold for 5
seconds until the VOC target gas selection is displayed, as
shown in Fig. 2.18.
Fig. 2.18 VOC Gas Selection
Isobutylene was originally used to calibrate the instrument, as
identied between two arrowheads.
To select a different VOC gas, press the button to scroll
through the available options.
When the required option is highlighted, press and hold the
button to select.
The ‘CUSTOM’ option allows the user to name a VOC gas and
set a relative sensitivity. See ‘CONFIGURATION HANDBOOK’
for further details.
Note: Only the most common VOC gases are listed. If
the required gas is not listed, response factors
can be used to obtain more accurate VOC gas
measurements. For further details see “Response
Factors” on page A-2.
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