RKI Instruments SDM-2012 Standalone Configuration - Manual (Page 57)

Calibrating a GX-2012 • 52
11. Press and hold the CAL
S
button until the CAL
S
LED turns on (about one
second) then release it. During the calibration, the CAL
S
LED will flash
amber indicating that a calibration is in progress.
If you wish to cancel the calibration, press and hold the CAL
S
button for at
least one second until CANCEL appears on the screen.
12. If at any point during the calibration the gas flow to the instrument becomes too
low, the calibration will be aborted and the screen will indicate a flow failure.
If a flow failure occurs, confirm all tubing connections are correct and that all
lines are clear.
• To return to the home screen, press and hold the EDIT ENTER button for
about 3 seconds.
• To start another calibration, press and release the CAL
S
button.
• To perform a bump test, press and release the BUMP
T
button.
13. The SDM-2012 begins the calibration by applying fresh air to the instrument
for the time defined by the AIR TIME calibration parameter.
14. The SDM-2012 will perform a fresh air adjustment on the instrument.
• If the air adjustment is successful, the SDM-2012 will continue as
described in step 15 below.
0
20.9
0
0.0
%
ppm
ppm
CH
4
O
2
CO
H
2
S
CAL AIR
%LEL
0
20.9
0
0.0
%
ppm
ppm
CH
4
O
2
CO
H
2
S
CAL AIR
vol%
%LEL
Standard 4-Gas GX-2012 or GAS %Volume Sensor Installed and GAS
Menu Item in Edit Mode Set to Std Menu Item in Edit Mode Set to ALL
- - -
- - -
- - -
- - -
%LEL
%
ppm
ppm
CH
4
O
2
FLOW NG
CO
H
2
S