Edwards CP35KB, Instruction Manual, Page: 13 / 20

D0300010001EN - Maintenance
Page 7
Figure 2 Sectional view of the CPG35K(B) gauge head
Mechanical maintenance
Removing and replacing the anode ring and the cathode plate
1. With a pair of flat nose pliers it is possible to remove the anode ring and the cathode
plate ( Figure 2 item 4) fixed elastically in the measurement chamber from the
measurement chamber.
2. Replace or clean the removed parts (see Cleaning of the gauge head ).
3. After having inserted the anode ring it should be strictly observed that the two open
sides of the anode ring are equally distant from the cathode plate and that the ignition
pins don't touch the chamber (distance approximately 1 mm).
Note:
Do not allow the ceramic bushing to get wet as it is able to absorb water.
The leakage current which results then causes the pressure to be shown on the operating
device as higher than it actually is.
1 Small flange NW25, NW40, DN40 CF
2 Gauge head body
3 Anode pin
4 Cathode plate
5 Anode ring with ignition pin
6 Ceramic disc
7 Current leadthrough
8 Connection socket