» How to calibrate the total gas with 1% methane

Instructions for calibration. You buy the tank, and MSI will provide free refills of the test gas! We carry 1% Methane, 99% Methane, and a 1% blend for the chromatograph

Video Coming Soon.... but until then, here's how:

In MControl Version 2-6-5, the total gas is calibrated a little different than the earlier versions. The signal voltages for the CCD and TCD filaments are used to define the appropriate gain for each filament. This allows the MLogger to have a two-point (1% Methane and 100% Methane) calibration on the TCD filament which improves its linearity. Running the test gas into the Sample In port at the back of the system gives a complete gas check of the system.

• At least one test, with 100% Methane test gas, through the Sample-in port is recommended. Subsequent checks can be done using the Zero Air port; this will use less test gas.
• All exhaust lines must be connected to the MLogger and routed outside the work area.
• The Zero Air and Carrier Air lines must be routed away from the exhaust lines to avoid recycling any gas.
• Zero the instrument before any calibration is performed, (see Zero the Filaments Using the Status Bar).

Calibration with the 1% Methane Test Gas
1. Zero the CCD and TCD detectors.
2. Attach the 1% methane bottle (yellow label) to the Sample In port at back of the MLogger.
3. Open the valve on the test gas bottle, and verify that the ball valve is turned to Rig.
4. Check the MAIN FLOW meter and verify that gas is flowing from the bottle. The TG FLOW should be set at .5 SCFH air.
5. Observe the Total Gas climb until it reaches a maximum and begins to settle.
6. Left click on Setup in the MControl tool bar and then left click on the Gas Detector tab.
7. Look at the signal voltage for the CCD filament from the Status bar in MControl. Enter that number in the field labeled CCD Voltage at 1% gas.
8. Look at the signal voltage for the TCD filament from the Status bar in MControl. Enter that number in the field labeled TCD Voltage at 1% gas.
9. Left click the Apply button and then left click the OK button.