Pfeiffer Vacuum Leak Detector ASM 142 D

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).

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 leak detector internally calibrated?

Ensure the following are connected properly

Is the selected test mode the one used by the operator?

Select method to set target value

In sniffing test mode, select calibration method

Is the internal calibration function activated?

Is the checking function activated?

Ensure the 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%?

If the 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

Take out the old filter and insert the new filter in the port

Torque the nipple of the sniffer probe to 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

Clean the rigid nipple with alcohol and compressed dry air