GMI PPM Gasurveyor 500, User Handbook Manual

Page: 56 / 90

PPM GASURVEYOR 500 USER HANDBOOK
B-4
In CAL mode, the instrument buttons have the functions
shown in Figure B-4.
Single Press Double Press
Press and
Hold
Button 1
Button 2
Figure B-4 CAL Mode Button Functions
Zeroing the Instrument
Note: There is no requirement to zero the Search range
since this is derived from PPM.
1) Enter FCM. See the previous section ENTERING
FCM.
2) Double press Button Two to zero current gas
range.
3) Single press Button Two to select the next gas
range.
4) Repeat steps 2 and 3 until all gas ranges have been
zeroed.
5) Proceed to FIELD CALIBRATION
PROCEDURE to calibrate the instrument.