33 • Connecting Calibration Gas, No SV-3 Attached
screws and the material they are screwed into are appropriate to support the
weight of the system.
Connecting Calibration Gas, No SV-3 Attached
The GAS 1, GAS 2, and GAS 3 fittings on the left side of the docking station 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
standard 4 sensors or is a version that has less than the 4 standard sensors but still
has an H
2
S sensor. If the GX-6000 does not have an H
2
S sensor, then a 3-gas mix,
LEL/Oxygen/CO, should be used for the GAS 1 fitting in order to protect the CO
sensor’s charcoal filter.
The GAS 2 and GAS 3 fittings are normally used for smart sensors (i.e. PID, ESS-03,
etc.). If you have a smart sensor installed (i.e. PID, ESS-03, etc.), a special cylinder
for the target gas of that sensor needs to be used for calibration. See the tables below
for examples of needed cylinders for various GX-6000 combinations. Keep in mind
that if you are going to use a 5-gas cylinder to calibrate one of the smart sensors,
make sure that the special sensor is assigned to GAS 1 (see “Inlet Parameters” on
page 47). See “Spare Parts List” on page 116 for part numbers of available cylinders.
If your instrument has no standard sensors, then the GAS 1 fitting may be used for
gas to test a smart sensor.
Table 8: Recommended Gas Cylinders and Gas Ports for Single-Station Use
Instrument Types
Recommended Calibration Gas Cylinder
and Gas Inlet Selection
3-gas (LEL/Oxy/CO) + low range PID
GAS 1
: 3-gas mix with LEL/Oxy/CO
GAS 2
: 10 ppm IBL
3-gas (LEL/Oxy/CO) + high range
PID
GAS 1
: 3-gas mix with LEL/Oxy/CO
GAS 2
: 100 ppm IBL
Standard 4-gas (LEL/Oxy/H2S/CO) +
low range PID
GAS 1
: 4-gas mix with LEL/Oxy/H2S/CO
GAS 2
: 10 ppm IBL
Standard 4-gas + high range PID
GAS 1
: 5-gas mix with LEL/Oxy/CO/H2S/IBL
Standard 4-gas + NH3
GAS 1
: 4-gas mix with LEL/Oxy/H2S/CO
GAS 2
: NH3
Standard 4-gas + low range PID +
NH3
GAS 1
: 4-gas mix with LEL/Oxy/H2S/CO
GAS 2
: 10 ppm IBL
GAS 3
: NH3