WIKA CPH6000 Betriebsanleitung Seite 34

6. Commissioning, operation
Class
7
Measurement uncertainty of the test item in % FS (i.e. of the span) or % rd (i.e. of reading)
Measurement type
8
Measurement type for the test item (gauge or absolute)
EN
Medium
9
Test medium (pneumatic → gas or hydraulic → oil)
Supply
10
Voltage supply for test item (on/off)
If no external supply is required for the test item, "OFF" should be selected to conserve energy
→ See chapter 4.2 "Electrical connections".
Hold time
12
Optional delay time [sec]
Actual
14
True value of the test item (will be recorded during the calibration)
CALIBRATION mode
In the CALIBRATION mode the data shown above the dashed dividing line is the same as in the "MEASURING with test item"
mode.
▶
Calibration process can be performed.
▶
With [▲] or [▼] the function can be
switched between pressure signal and
electrical signal.
Current measured value of the
1
CPT6000 reference pressure
sensor
Current measured value of the test
2
item
Deviation between the test item and
3
reference
Set point of the calibration
4
Actual value of the calibration
5
P - 01: Test item no. 1
6
<01>: Test step no. 1
IDENT number of the test item
7
Current value of the output signal of the test item
8
With the calibration of pressure measuring instruments with electrical output signals (pressure transmitters/transmitters) the
reference is calibrated to the display (i.e. the pressure is always adjusted so that the reference value matches the set point
exactly).
As an exact setting of the pressure is not always possible under certain circumstances, the true reference value is also
recorded along with the actual value (test item value) and the set point (reference value). With the WIKA-Cal software, this can
be listed in the calibration certificate.
If the calibration is to follow DKD guidelines, then the measured values for each subsequent test point should
not be recorded until a defined time has passed (for example 30 seconds), consisting of a load change time and
settling time (see Fig. 1 "Calibration cycle in accordance with DKD guideline 6-1" for measurement uncertainty >
0.6 % of measuring span).
34
Calibration 13:41
Reference
0.000 10.000
1
0.000
bar
Testitem
0.000
6.000
3
0.004
bar
3 Dev.:
0.004 bar
0.07 %FS
4
0.000 bar
Set:
5
0.000 bar
True:
01
6
P-01:
123456
ID no:
7
Pressure signal
(test item)
WIKA operating instructions, pressure calibrator model CPH6000
Calibration
Reference
0.000
0.000
Testitem
4-20 mA
4.011
Dev.:
P I/U
0.004
switchable
0.07
0.000
Set:
0.000
True:
01
P-01:
123456
ID no:
Electrical signal
(test item)
13:41
10.000
bar
8
bar
bar
%FS
bar
bar