Cleaning Frg-700 - Agilent Technologies FRG-700 User Manual

Technical Information

Cleaning FRG-700

Cleaning the measuring chamber and the polarity insert
1 Using a polishing cloth rub the inside walls of the measuring chamber and the
polarity insert to a bright finish.
The sealing surfaces must only be worked concentrically.
NOTE
2 Rinse the measuring chamber and the polarity insert with cleaning alcohol.
3 Allow both to dry.
Cleaning or replacing the anode
1 Remove the used ignition aid (10a) with tweezers.
2 Using a polishing cloth rub the anode pin to a bright finish
Do not bend the anode. Do not carry out mechanical work on the ceramic part.
NOTE
3 Rinse the anode with cleaning alcohol.
4 Allow the anode to dry.
5 Insert a new ignition aid (10a) into the mounting tool.
6 Carefully press the anode (clean or new) centered and parallel to the tool axis
into the ignition aid and insert it to a depth of approx. 15 mm. The final
positioning is established after the anode is installed.
Cleaning the Pirani element
1 Remove the FPM seal (13a) from the Pirani element (13).
2 Fill the Pirani measuring tube with cleaning alcohol and let it work.
3 Pour the alcohol out of the tube.
4 Dry the tube (e.g. with a blow dryer <150 °C).
5 Slide a new FPM seal over the Pirani element and insert it into the
corresponding groove.
6 Reinstall the Pirani element.
Agilent Inverted Magnetron Pirani Gauge FRG-700 and FRG-702 User Manual 35