RKI Instruments SDM-2012 Standalone Configuration - Manual (Page 59)

Calibrating a GX-2012 • 54
menu item in Edit Mode is set to Std, continue with step 17.
If a %volume sensor is installed in your GX-2012 and if the GAS menu item in
Edit Mode is set to ALL, GAS 2 calibration gas will then be applied to that
sensor for the time defined by the GAS TIME calibration parameter.
17. The SDM-2012 will then purge the system with fresh air for the time defined by
the AIR TIME calibration parameter.
18. After the fresh air purge is complete, the screen will alternate between the gas
readings and the calibration results. If the calibration passed, the auto
calibration values will be displayed. If the calibration failed, the gas readings at
the end of the gas application will be displayed. The calibration results are
indicated with a P (pass) or an F (fail) to the left of the channel units. Use the
EDIT ENTER button to scroll between the calibration results for the standard
four sensors and the calibration results for the %volume sensor (if installed).
The CAL
S
LED will stop blinking and be steadily green if all channels passed
the calibration or steadily red if any channel failed the calibration. In the
examples below, the CO sensor failed calibration.
Figure 29: Calibration Results, Standard 4-Gas GX-2012 or
GAS Menu Item in Edit Mode Set to Std
98
vol%
CH
4
CAL G2
CAL AIR
P
P
F
P
%LEL
%
ppm
ppm
CH
4
O
2
CO
H
2
S
CAL
49
12.0
12
24.5
%LEL
%
ppm
ppm
CH
4
O
2
CO
H
2
S
CAL