GENERAL OPERATIONAL INSTRUCTIONS
Note: Fully charge the unit before use when the instrument is first received or if the instrument
has been in storage for six months or more.
Switching the Instrument On
To switch on the instrument, press the ‘On/Off’ key briefly. There will be a short beep and a
slight pause followed by the Geotech logo.
The power on self-test will commence.
Assuming there are no warnings to display the instrument will continue to the ‘Main Read
Screen’.
Switching the Instrument Off
Purge with fresh air. Run the pump for approximately 30 seconds or until the readings have
returned to normal levels.
Note: Before the instrument is switched off a clean air purge should be performed. This ensures
that the instrument is free from gas and ready for the next measurement. This final purge is
especially important for the oxygen sensor as it may degrade if stored when contaminated with
gas.
To switch off the instrument, press the ‘On/Off’ key briefly.
Note: If the ‘Auto Off’ utilities setting is set to ‘Yes’, the analyser will switch off automatically
after ten minutes if not in use.
Entering Data
During normal operation the user may be prompted to enter data or information via the keypad, i.e.
entering an ID code or setting an alarm level.
When entering data into the instrument all fields are fixed format and are populated from the right.
Numeric Data
To enter a new time 09:25:00 the user would type in 092500 using the numeric keypad in the
following sequence:-
* __:__:_0
* __:__:09
* __:_0:92
* __:09:25
* _0:92:50
* 09:25:00
Press the ‘Enter’ key to confirm/accept data keyed.
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