GMI Gasurveyor 500 Series, User Handbook Manual

Page: 63 / 102

B-3
Selectable Ranges in FCM
When in FCM the following ranges are manually selectable
by pressing Switch Two ( ) : PPM, LEL, Volume GAS,
Oxygen, Toxic Range 1, Toxic Range 2.
Cal Due Date can also be edited in FCM.
Entering FCM
1) Switch the instrument on and allow it to complete
its warm-up checks.
2) Double press Switch One ( ) to initiate
instrument switch off. While OFF is displayed in
the LCD and before the instrument actually
switches off, enter the four switch access code.
Note: Allow at least one second between switch
presses when entering the four switch sequence.
The default (factory set) entry code is switch
sequence 1,2,3,4. Alternative codes are user
selectable.
When the instrument is in FCM, the “CAL” message
alternates on the display with the currently selected range.
An example of the display is shown in Figure B-3.
Figure B-3 Field Calibration Display
FIELD CALIBRATION