OFFSET Command
Applies to: ALL modes (general purpose).
The CT-BOX device is already factory-calibrated during the production process. However, at power-up the device has a very small offset error (< 10 ppm), due to the intrinsic magnetic properties of the DCCT technology. In order to obtain a very accurate measurement, it is possible to nullify this offset.
Command Format:
R/W |
Command |
Response |
Description |
|---|---|---|---|
W |
|
|
Set the currently measured current as zero of the device |
Warning
The offset compensation must be performed when the primary current is equal to 0, i.e. when no current is flowing through the DCCT.
Note
If the detected offset value is too big it is not accepted, and the unit
replies with error code 24 (see List of the Error Codes).
Note
The offset compensation is stored in the unit and is retained after a power cycle.
Example(s):
OFFSET:ZERO
ACK