35 • Connecting Calibration Gas, SV-3 Attached
To connect calibration gas to the SDM-6000, do the following:
1 . If the area around the docking 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 left side of the docking station and route it to a fresh air area or
connect a cylinder of zero air with a demand flow regulator to the AIR fitting.
NOTE:
If you are testing a GX-6000 with an IR CO
2
sensor in the 0-10,000
ppm or 0-5.00 %vol range, a CO
2
scrubber will have to be installed
somewhere in the air line while testing the IR CO
2
instrument.
2 . Install the demand flow regulator(s) on the calibration gas cylinder(s).
NOTE:
Do not connect pressurized gas directly to the SDM-6000. Be sure to
install a demand flow regulator on the cylinder before connecting it to
the SDM-6000.
3 . Connect the demand flow regulator to the appropriate inlet fitting using 3/16
inch ID sample tubing.
Connecting Calibration Gas, SV-3 Attached
The GAS 1, GAS 2, GAS 3, GAS 4, GAS 5, and GAS 6 fittings on the left side of the
SV-3 are designed to be used with a calibration gas cylinder that is fitted with a
demand flow regulator. The AIR fitting may be used with a demand flow regulator and
a cylinder of zero emissions air, but this is not normally necessary since the docking
station will generally be in a fresh air area.
The type of calibration gas cylinder used for the GAS 1 fitting depends on the gas
sensors installed in the GX-6000. A 4-gas mix, LEL/Oxygen/CO/H2S, is used for the
GAS 1 fitting if the GX-6000 being used with the docking station contains the
Instrument 1
: Standard 4-gas + SO2
Instrument 2
: Standard 4-gas + SO2 + NH3
GAS 1
: 5-gas mix with LEL/Oxy/
CO/H2S/SO2
GAS 2
: NH3
Instrument 1 and 2
: Standard 4-gas + low range
PID + NH3
GAS 1
: 4-gas mix with LEL/Oxy/
H2S/CO
GAS 2
: IBL
GAS 3
: NH3
Instrument 1 and 2
: Standard 4-gas + high
range PID + NH3
GAS 1
: 5-gas mix with LEL/Oxy/
CO/H2S/IBL
GAS 2
: NH3
Instrument Types
Recommended Calibration Gas
Cylinder and Gas Inlet Selection