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Calibration
User Calibration
The G100 range of instruments is fully calibrated during manufacture and when returned for service.
However, to improve accuracy between services a user/field calibration can be performed.
This section sets out the correct procedures to achieve an accurate user calibration.
Two important terms that are used within this section are "Zero" and "Span".
Zero: The point at which the instrument is calibrated when there is none of the target gas present.
Span: The point at which the instrument is calibrated when a known quantity of the target gas is present.
Calibration Gases
User calibration of the instrument will improve the data accuracy in the range of the calibration gases
used. However, it may cause less accurate readings of concentrations outside this calibrated range. Users
should select the correct calibration gas for the expected gas levels on their particular application. Only
use gases with a known certified gas concentration.
Thermo Scientific
Note If the calibration is completed incorrectly it may decrease the accuracy of the
instrument.
Note Certified calibration gases can be supplied by Geotechnical Instruments (UK)
Limited.
WARNING For each gas used the appropriate material safety data sheet must be read
and understood before proceeding. Calibration gases and the use of pressure regulators can
be dangerous.
7
G100 Range CO
Analyser
2
7-1
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