Delta NANOTRACE DF-745 Instruction Manual download pdf (Page 64)

60 DF-745 User Interface

7.4.10.4 Signal Monitor

Figure 63: Signal Monitor Menu

The Signal Monitor depicts 18 system parameters in numerical order. Each parameter is

unique for each system. In the event of a system error, these parameters can be used as a

diagnostic tool. See page 47 for additional information on system errors.

Figure 64: Signal Monitor Screen

7.4.10.5 Pump Capacity Test

The pump capacity test can be used to determine the ultimate vacuum that the aspirator or

pump is capable of pulling and as a result its’ capacity to pull sufficient sample through the

analyzer. The test is automatic in nature, in that once started, the analyzer isolates the

moisture cell by closing the upstream and downstream valves and then the vacuum is

monitored for 20 seconds and is displayed on the screen. Any pressure lower than 115 Torr

is considered acceptable. If the aspirator or pump is unable to pull 115 Torr, a failure is

indicated by the appearance of Figure 67 and the recommendation to rebuild the pump or

check for leaks. At the end of the 20 second test, whether the aspirator or pump passes or

fails, the user must hit Escape to return to the main display.

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Delta NANOTRACE DF-745 Instruction Manual Page 64