stored using the default logging ID.
After each reading the instrument should be purged with fresh air.
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
2
, O
2
)
Sample pressure (for indication only)
Temperature x 2
Humidity
Alternative Reading Methods
There are three other reading types or methods which each require slightly different operating
procedures.
Logged reading
Peak reading
Hold reading
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.
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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