Teledyne GC-Pro/FID - Gas Chromatograph - Manual (Page 50)

Operation GC-Pro FID
Teledyne Analytical Instruments 36
After the air is flowing through the sensor and warm-up time has
been completed, activate the following gases:
4.4.2 Carrier Gas
Set the carrier gas source regulator to 80 psig and adjust the analyzer
sample regulator until the sample pressure gauge reads the
recommended sample pressure of 7.0 psig.
4.4.3 Span Gas
1. Feed span gas to the analyzer (see Section 4.4.3). Gas switching
can be performed manually or handled through the auto
calibration valves (if the option is added). See Section 4.7.10.3.
2. Observe that the analyzer sample flow meter reads from 0.3 to
1.0 SCFH.
4.4.4 Fuel
1. Open the main valve on the fuel source and set the fuel pressure
regulator to 40 psig.
2. Adjust the fuel regulator until its pressure gauge reads the
recommended pressure of 4.0 psig.
Note: Adjust fuel settings only when the red LED (flame failure
light) is off.
4.5 Sample Pump
A built-in sample pump is provided to draw sample gas from
ambient air. The gas flow rate should be maintained at about 1000 to
1200 cc/minute using the Front Panel flow control valve (clockwise
increases flow). See Figure 1-1.
4.6 Flame Ignition
After the warm up countdown on the display reaches zero, open the
gas control door and observe that the amber heater lamp is blinking
(indicating that the temperature controller is maintaining the temperature
setpoint) and the red Flame Out lamp on the front panel is on. See
Figure 1-1.