18
4 Mounting
WIKA Operating Instructions - Process pressure transmitter CPT-2x
The Second Line of Defense (SLOD) is a second level of the process
separation in form of a gas-tight leadthrough in the housing neck,
preventing products from penetrating into the housing.
With these instruments, the process assembly is completely en-
capsulated. An absolute pressure measuring cell is used so that no
ventilation is required.
With relative pressure measuring ranges, the ambient pressure is
detected and compensated by a reference sensor in the electronics.
1
2
1
2
Fig. 13: Position of the filter element - gastight leadthrough
1 Filter element
2 Gas-tight leadthrough
1
Fig. 14: Position of the filter element - IP69K version
1 Filter element
Instruments with absolute pressure have a blind plug mounted
instead of the filter element.
4.4 Process pressure measurement
Keep the following in mind when setting up the measuring system:
•
Mount the instrument above the measuring point
Possible condensation can then drain off into the process line.
Filter element - Position
Second Line of Defense
Filter element - Position
IP69K version
Measurement setup in
gases
