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8 Diagnosis, asset management and service
WIKA Operating Instructions - Process pressure transmitter CPT-2x
5. Remove the form seal for the measuring cell and remove it by a
new one
6. Screw the process component into the process fitting, tighten the
hexagon (wrench size see chapter "
Dimensions
", max. torque see
chapter "
Technical data
")
7. Insert new O-ring seal for the process fitting
8. Install the process pressure transmitter in the welded socket,
tighten compression nut
The cleaning is finished.
The pressure transmitter is directly ready for operation, a fresh adjust-
ment is not required.
8.3 Diagnosis memory
The instrument has several memories available for diagnostic pur-
poses. The data remain there even in case of voltage interruption.
Up to 100,000 measured values can be stored in the sensor in a ring
memory. Each entry contains date/time as well as the respective
measured value.
Depending on the instrument version, values that can be stored are
for example:
•
Level
•
Process pressure
•
Differential pressure
•
Static pressure
•
Percentage value
•
Scaled values
•
Current output
•
Lin. percent
•
Measuring cell temperature
•
Electronics temperature
When the instrument is shipped, the measured value memory is ac-
tive and stores pressure value and measuring cell temperature every
10 s, with electronic differential pressure also the static pressure.
The requested values and recording conditions are set via a PC with
PACTware/DTM or the control system with EDD. Data are thus read
out and also reset.
Up to 500 events are automatically stored with a time stamp in the
sensor (non-deletable). Each entry contains date/time, event type,
event description and value. Event types are for example:
•
Modification of a parameter
•
Switch-on and switch-off times
•
Status messages (according to NE 107)
•
Error messages (according to NE 107)
The data are read out via a PC with PACTware/DTM or the control
system with EDD.
Measured value memory
Event memory
