Section 2 Detective+
LOG MENU
The LOG MENU acts similarly to the MENU system just described. Options are:
START or STOP. One of these two options is displayed depending on the cur-
rent state of the data logger. Press START to turn data logging on, and STOP
to turn logging off.
USER
Allows selection of a user name, which is used in the data log (see later). The
act of changing the user is an event which is logged by the data logger.
SITE
As user, but site location.
4.3 Quickcal
The instrument has the ability to perform a ‘quick calibration’ of four gas chan-
nels: CH4; CO; H2S and O2 in ‘one go’. The system prompts the user through
the procedure. Before QuickCal is initiated, the instrument should have been
zeroed. Now follow this procedure:
Press both of the middle 2 buttons, and hold them down for 5-7 seconds.
The instrument will announce that the Quick Calibration has been initiated,
and remind the user that the instrument should have been zeroed before this
procedure is invoked.
The instrument will now alternately flash the gas concentrations it is expecting
to be applied and the prompt CALIBRATE ALL INPUTS, with the two outer keys
labelled with YES and NO. Pressing YES moves on in the QuickCal sequence,
NO abandons the QuickCal and the instrument returns to the normal gas
monitoring screen.
The instrument will now issue the prompt 'Is gas on sensors?' with the two
outer keys labelled YES and NO as before. Ensure the correct test gas is applied
to the instrument, and press YES. Pressing NO returns the instrument to the
normal gas monitoring display.
If YES is pressed the display will change to SENSORS SETTLING, with a line of
dots appearing on the bottom line of the display to indicate the instrument is
working. The instrument will now wait until there appears to be a good steady
flow of gas, and then the calibration will be performed. If the instrument per-
ceives that the gas level is not steady then the message 'Gas not stable!' will
be displayed and the calibration aborted.
Quick Cal Detective+
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