GMI Gasurveyor 500 Series, User Handbook Manual

Page: 65 / 102

B-5
4) Repeat steps 2 and 3 until all gas ranges have
been zeroed.
5) Proceed to FIELD CALIBRATION PROCEDURE to
calibrate the instrument.
Field Calibration Procedure
1) Zero gas ranges before attempting calibration. See
previous section ZEROING THE INSTRUMENT for
details.
2) Make sure that the instrument pump is running and
the gas range selected is compatible with the
calibration gas.
Note: A single press of Switch One ( ) toggles the
pump Off / On.
3) Remove the cap from calibration gas cylinder. Make
sure that the regulator valve is in the fully closed
position (Off) then connect the gas regulator to
the gas cylinder (push down gently and tighten
clockwise, hand tight). See Figure B-5 for details.
Figure B-5 Connecting Gas
FIELD CALIBRATION