Gas Data GFM 436, User Manual

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9ENG8008 GFM436 User Manual
GFM436 Product Specification- 20
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used to multiply the PID reading to give an accurate total hydrocarbon value in the borehole. This figure is accurate
for the Ionscience Ltd Phocheck range of PIDs up to a value of 10 which occurs at approximately 9% methane in the
borehole.
This characteristic varies between PID manufacturers. For example, typically only 5 – 6% of methane will diminish
the PID response of a RAE Systems unit to only one tenth of the correct value thus needing a PID compensation
factor of 10. Instrument characteristics when subjected to high levels of methane do differ considerably (see chart
of typical responses below).
6.4 Third Party Approvals
6.4.1 ATEX, UKEX and IECEx
This instrument is ATEX, UKEX and IECEx Certified under normal operation.
ATEX, UKEX and IECEx accreditation is void under the following circumstance:
If the instrument is removed from its leather case
If the instrument is charging or plugged into a computer i.e. not under normal operation