General Handling Instructions; Operation Mode; To Connect / Change Sensors; Zero Correction Of The Pressure Sensor ('Offs') - WIKA CPT2500 Instruction Manual

Pressure sensor CPT2500 with USB adapter CPA2500 and USBsoft

2 General handling instructions

2.1

Operation mode

The measurement is started by a trigger condition. Then the device automatically gives back the meas-
ured values in the adjusted cycle time without any request, until the stop condition is fulfilled. For the
communication and configuration of the device, the software USBSoft2500 is necessary.
Adjustable parameters are among other ones:
Cycle time:
Measured values:
cycle time < 5 ms
cycle time > 5 ms
Trigger conditions:
Pre-trigger:

2.2 To connect / change sensors

Only pressure sensor model CPT2500 are allowed to be used! If other sensors are used the adapter and
the sensor may be destroyed.
To change the sensor you have to disconnect the adapter. Sensors have to be connected before acti-
vating the adapter. Otherwise they are not found by the adapter correctly.
During the connecting it is possible that the connector does not snap in the jack correctly. In this case you
have to hold the connector at the bend relief not at the casing. Don`t plug the connector wedged. An accu-
rate attached jack can be easily plugged in without great effort. To disconnect the sensors it is not allowed
to pull at the cable. In this case you have to hold the connector at its casing.

2.3 Zero correction of the pressure sensor ('OFFS')

For the measurement a zero offset can be conducted:
shown vale = measured value - offset
The zero correction in combination with the slope correction (see below) is mainly used to adjust the devi-
ation of sensors. The entry has to be made in the configuration software. The offset information will be
stored in the sensor. So you can set it individually for each sensor.

2.4 Slope correction of the pressure sensor ('SCAL')

The measurement`s slope can be affected by this factor (factor in %):
shown value = measured value * (1 + scale / 100)
The slope correction in combination with the zero correction (see above), are mainly used to adjust the
deviation of sensors. The entry has to be made in the configuration software. The scale information will be
stored in the sensor. So you can set it individually for each sensor.

2.5 Pressure connection to the pressure sensor

The measuring adapter is conceived that way, that all sensors of the CPT2500-series can be connected
without new calibration. Therefore a multiplicity of fully exchangeable sensors for metering ranges of
-1 ... 0 bar relative to 0 ... 1000 bar absolute are available.
For overpressure, low-pressure or absolute pressure measurements: screw the sensor in the threat
(G1/2") or connect a flexible hose with an appropriate adapter to the pressure sensor.
WIKA Operating Instructions, model CPT2500
1ms ... 10sec., programmable in steps of ms
it is possible to choose the values to be recorded
(measurand, min. peak, max. peak)
a complete data set is always recorded, containing the following values:
- actual pressure at the moment of the data transfer
- minimum pressure (min. peak) in the period of the last cycle time
- maximum pressure (max. peak) in the period of the last cycle time
- average value of the pressure in the period of the last cycle time
5 for the measuring start / 6 for the measuring stop
50 data sets (at a cycle time of
time < 5 ms)
5ms) respectively 200 measurands (cycle
5