RKI Instruments SDM-2009 - Manual (Page 35)

Calibrating a GX-2009 • 31
9. 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.
10. 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.
11. The SDM-2009 begins the calibration by applying fresh air to the instrument
for the time defined by the Air calibration parameter.
12. The SDM-2009 will perform a fresh air adjustment on the instrument.
• If the air adjustment is successful, the SDM-2009 will continue as
described in step 13 below.
• If one or more of the sensors fails the fresh air adjustment, the SDM-2009
will abort the calibration and will not apply calibration gas. If this happens,
the CAL
S
LED will flash red indicating a failure and the following screens
will alternate indicating the fresh air readings and which channels passed
and failed the fresh air adjustment with a P (pass) or an F (fail). In the
following examples, the CO channel failed the fresh air adjustment.
Figure 16: Failed Fresh Air Adjustment
In this case continue with step 16.
0 20.9
CAL AIR
CO ppm H2S ppm
CH4 %LEL OXY vol%
0 0.0
- - - - - -
FLOW NG
CO ppm H2S ppm
CH4 %LEL OXY vol%
- - - - - -
P P
ZERO NG
CO ppm H2S ppm
CH4 %LEL OXY vol%
F P
0 12.0
ZERO NG
CO ppm H2S ppm
CH4 %LEL OXY vol%
45 0.0