RKI Instruments SM-2003U - Manual (Page 18)

18 • Hardware Setup
To connect calibration gas to the SM-2001U or SM-2003U do the
following:
1. If the area around the calibration station is not considered a fresh
air area (an area free of combustible and toxic gases and of normal
oxygen content, 20.9%) install a tube not longer than 10 feet on the
filter attached to the AIR fitting on the back of the docking station
and route it to a fresh air area or connect a cylinder of zero air to
the fitting using a demand flow regulator.
2. Install the demand flow regulator on the calibration gas cylinder.
3. Connect the demand flow regulator to the CAL. GAS port using
sample tubing.
Setting the MODE Switch
The MODE switch can be used to lengthen or shorten the bump test time
by shortening or lengthening the calibration gas application time. It can
also be used to set the calibration station to automatically perform a
calibration if the instrument fails a bump test. Since shortening the time
GX-2001
LEL/Oxy/H2S 4-gas mix with CH4/Oxy/H2S/CO
GX-2003
GX-2003: LEL/Oxy H2S/CO 4-gas mix with CH4/Oxy/H2S/CO
GX-2003
%Vol CH4/LEL CH4/Oxy/H2S/
CO • 4-gas mix with CH4/Oxy/H2S/CO
• 100% Volume CH4
GX-2003
%Vol CH4/LEL CH4/Oxy/CO • 3-gas mix with CH4/Oxy/CO
• 100% Volume CH4
GX-2003
LEL/Oxy/CO 3-gas mix with CH4/Oxy/CO
GX-2003
LEL/Oxy/H2S 4-gas mix with CH4/Oxy/H2S/CO
Table 3: Recommended Gas Cylinders
Typical Instrument Types
Recommended Calibration Gas
Cylinder(s)