Installation
Model 3110XL
Teledyne Analytical Instruments
12
3.
Set the calibration gas flowrate to 1 SCFH.
4.
Attach the vent line followed by the span gas line using the
quick disconnect fittings.
5.
Navigate to the SPAN VALUE screen (see Section 3.2.6)
and set the span value to the known oxygen concentration in
ppm of the span gas.
6.
Observe the oxygen reading on the screen to determine when
the reading has stabilized.
7.
Navigate to the SPAN screen and select SPAN: START, then
press ENTER.
8.
When the screen changes and displays SPAN: FINISH, select
SPAN: FINISH to set the span.
9.
Allow the span gas to flow for several minutes to verify the
proper span setting.
10.
Calibration is complete. Remove the span gas line first
followed by the vent line.
2.4.3 Bleeding the Regulator and Purging the Gas Line
When using bottled gas (gas cylinder) as a calibration gas for trace
analysis applications, the regulator and sample lines should be purged to
remove traces of trapped air. Otherwise, trapped air in the lines
(especially between the regulator and cylinder) will cause the analyzer
reading to slowly change over a period of hours.
To bleed the regulator and sample line:
1.
Attach the regulator to the gas cylinder. Then attach a sample
line with a flow control/shut off valve preferably at the far
end of the sample line.
2.
Open the shut off valve slightly, and then open the valve on
the gas cylinder.
3.
Adjust the regulator to the desired pressure (usually 5 psi)
then close the cylinder valve.
4.
Open the cylinder valve to pressurize the regulator fully then
close the cylinder valve again.
5.
Open the sample flow control valve and allow the gas to
bleed down and vent to a safe area. Observe the secondary
gauge (low pressure side) on the regulator. As the low
