Cleaning Frg-702 - Agilent Technologies FRG-700 User Manual

Technical Information
10 Mount the magnet unit (4) and lock it with the screw (3).
11 Carefully mount the electronics unit (2). (Make sure the pin of the Pirani
element is properly plugged into the corresponding hole of the electronics unit).
12 Push the electronics unit up to the mechanical stop and lock it with the hexagon
socket set screw (1).
13 Adjust the gauge.

Cleaning FRG-702

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 pliers.
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.
Replacing the Pirani element
1 Slide the screw fitting (13a) and the copper seal (13b) over the Pirani
element (13).
2 Mount the Pirani element.
Agilent Inverted Magnetron Pirani Gauge FRG-700 and FRG-702 User Manual 39