Pfeiffer Vacuum Leak Detector ASM 142

Is the internal calibration function activated?

Is the checking function activated?

Calibration Checking with Internal Calibrated Leak

Ensure leak detector is in Stand-by mode

Enter the signal value delivered by the internal calibrated leak

Enter the internal calibrated leak parameters set value

Is the difference between the signal and parameters set value lower than 15%?

Perform complete calibration of the leak detector if difference is higher than 15%

Is the leak detector internally calibrated?

Ensure the following are connected properly

Cancel external calibration procedure if needed

Select method to set target value

Enter target value directly (if applicable)

Ensure the new needle has the same diameter as the old needle.

Select the method for needle adjustment

Connect a flowmeter (0/100 sccm) between the helium leak detector (or pump) and the sniffer probe.

Is the inlet pressure below 10 mbar?

Cut the new needle to 85 mm / 3.35 inch and insert it correctly into the nozzle.

Enter the flowmeter reading (sccm).

Does the flowmeter display the maximum flow value (60 ± 2 sccm)?

Connect a calibrated leak to the inlet port of the detector

Select the gas used for calibration

Program all parameters of the used calibrated leak

Place the external calibrated leak on the test port

Record internal parameters values displayed during calibration

Did the digital voice announce 'Detector ready for cycle'?

Confirm use of uncalibrated leak detector for test cycle if calibration failed

Check if 'AL' is displayed permanently

Verify bargraph availability for leak value reading