RKI Instruments SM-2003U - Manual (Page 28)

28 • Bump Testing and Calibrating a GX-2003 with 100% Volume Methane
Bump Testing and Calibrating a GX-2003
with 100% Volume Methane
The GX-2003 can have a %volume methane detector installed. This
detector cannot be bump tested or calibrated using the typical gas mix
that is used for the other detectors. To accommodate this special need,
the SM-2003U includes the VOL. control button. This button activates the
%volume gas function. When this function is active, the SM-2003U will
bump test or calibrate only the %volume detector in a GX-2003 when a
bump test or calibration is performed. If an instrument does not have an
active %volume detector, then the VOL. button does not function.
NOTE: The SM-2001U also includes a VOL. control button, but
it does not function on an SM-2001U since the GX-2001
does not have %volume methane capability.
To bump test or calibrate the %volume detector in a GX-2003, do the
following:
NOTE: If you have performed a bump test or calibration on a
GX-2003 and then wish to perform a bump test or
calibration on the %volume detector, begin with
instruction 8 below.
WARNING: Use only 100% volume methane when bump
testing or calibrating a GX-2003 %volume
detector. Use of a different concentration will
result in an inaccurate bump test or calibration.
1. Verify that the 100% volume methane gas cylinder is connected to
the CAL. GAS fitting on the back of the SM-2003U.
2. If performing a bump test, verify that the MODE rotary switch is in
the position that defines the desired bump test pass criteria. See
Table 4 on page 20.
If performing a calibration, skip this step
3. If the calibration station is off, turn it on using the power switch on