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WIKA operating instructions process pressure transducer, model CPT6020
0020507001F 05/2019 EN
EN
Operation
RANGE_MIN?
N/A
+n.nnn
Minimum range in
current units.
RANGE_MAX?
N/A
+n.nnn
Maximum range in
current units
UNIT_INDEX?
UNIT_INDEX<sp><n>
n
Mensor unit index: 1-39
or 99 for CUST_UNIT.
See Table 6.1.2.5
UNIT?
N/A
cccccccccc
Unit text 10 char -
mmHg, psi, kPa…
CUST_UNIT?
CUST_UNIT<sp><n>
+n.nnn
Sets custom unit
multiplication (xx/psi).
See Section 6.1.2.6
Calibration Related Commands
CAL_DATE?
CAL_DATE<sp><yy,mm,dd>
(Password Protected)
nn,nn,nn
Calibration date
SPAN?
CAL_SPAN<sp><n>
(Password Protected)
+n.nnn
Customer span multipler
- 0.99 to 1.01. See
Section 6.1.2.7
ZERO?
CAL_ZERO<sp><n>
(Password Protected)
+n.nnn
Customer zero adder.
See Section 6.1.2.7
N/A
TARE<sp><n>
n
Turns tare on/off - 1/0
Temperature Related Command
TEMP?
N/A
+nnn.n
Temperature in deg. C.
Output Control Commands
OUTPUT_MASK?
OUTPUT_MASK<sp><n>
n
Configures output for
PRESS? Query and
Continuous Output– see
6.1.2.10
Table 6.1.2 – Sensor Command Set
Password Protection
In the Sensor Command Set, data that affects calibration is protected by a user settable 4 character password (designated as
“Password Protected”). The default password is “0000”. This is changed using the PWD_CHANGE command. It should be
changed once the user receives the device. The factory password will override the user’s password in the case that the user loses
their password.
Filter & Window
The filter is a percentage of the previous reading averaged with the current reading - as long as the current reading is within the
window of the previous reading. The window is set as a %FS of the transducer’s range. If the current reading is outside of the
window from the previous reading, the filter is unused and the current reading is displayed without manipulation. This scheme
allows the user to tune the transducer’s response as they like. It also allows the transducer to respond to rapid pressure changes
without having to change the filter. The default values are 0.01% FS for the window and a filter of 90%.
