Pfeiffer Vacuum Leak Detector ASM 142 S

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.

Insert the needle correctly into the nozzle.

Enter the flowmeter reading (sccm).

Automatic Calibration Procedure

Record internal parameters values displayed during calibration

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

Confirm use of uncalibrated leak detector if calibration failed

Connect a calibrated leak to the inlet port of the detector

Select the gas to be used for calibration

Program the parameters of the calibrated leak

Place the external calibrated leak on the test port

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 signal and parameters set value lower than 15%?

If difference is higher than 15%, perform a complete calibration of the leak detector

Remove the screw at the end of the sniffer probe using a 2.5 hexagonal key

Insert the new filter into the port

Hold the assembly straight up and screw on the nipple of the sniffer probe, ensuring torque is less than 1 N.m

Install the screw so that it is totally inside the nipple, ensuring a few threads are visible

Needle and Nipple Cleaning (For sniffer probe with rigid nipple only)

Remove the needle using needlenose pliers

Clean the needle delicately with alcohol and a lint-free cloth