Delta NANOTRACE DF-745 Instruction Manual download pdf (Page 53)

User Interface DF-745 49

Figure 44: Pump Capacity Test Log

7.4.7 Analyzer Setup

The analyzer setup menu allows the user access to the Gas Scale Factor settings, Alarm

Setups, Analog Output setup and Graph setup.

Use the arrow keys ( and  to scroll up and down through the list. Pressing ESC will

return to the main display.

7.4.7.1 Sample GSF

Figure 45: Sample GSF Menu

The GSF setup (Gas Scale Factor) is critical for obtaining quantitatively correct results. It

accounts for the fact that moisture molecules have different absorption features in different

buffer gases.

The GSF should be applied when the user has any knowledge of a change in the buffer gas

or change in the percentages of a mixed background gas. The default setting from the

factory is 100% N

, yielding a GSF of 1.00.

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Delta NANOTRACE DF-745 Instruction Manual Page 53