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OMG100N1.21
7)
Disconnect the sample tube from the instrument. Then, run the pump for a minimum
of 30 seconds. The gas readings should return to nominal values for fresh air.
Regardless of the instrument configuration the following data will be stored for each
reading:-
ID code (8 characters)
Reading Type (0=User, 1=Auto, 2=peak, 3=hold)
Current time/date
Gas readings (CO
Sample pressure (for indication only)
Temperature x 2
Humidity
6.3
Alternative Reading Methods
There are three other reading types or methods which each require slightly different
operating procedures.
Logged reading
Peak reading
Hold reading
6.3.1
Logged Reading
Logged readings need to be configured and initiated via the 'Utilities' menu by pressing
'Key 6 - Logging'. During configuration the user will be asked to supply an ID, reading
interval and pump run-time.
These parameters are used to control the reading frequency in logging mode. Once
logging mode is activated the instrument will automatically record a reading at every
interval until stopped by the operator or the memory becomes full. Logging is also
suspended temporarily whilst the user is accessing the menu options.
Whilst the logging mode is active the 'Hold', 'Pump' and 'Store' key will be deactivated,
only logged readings can be stored.
6.3.2
Peak Reading
The operator can toggle the reading mode between normal (current) and peak readings.
Whilst in peak reading mode the instrument will only display peak values for each of the
channels. These values can then be stored by pressing the 'Store' key or automatically at
the appropriate logging interval (if logging is enabled).
The peak value is reset after a reading is stored or by exiting the peak mode using the
appropriate soft-key. The current mode of operation can be identified by the status of
the soft-key, either 'Normal' or 'Inverse', where inverse indicates peak mode is active.
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Copyright Geotechnical Instruments (UK) Limited
G100 Range
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