SCALE Command

Applies to: ALL modes (general purpose). Password protected.

The SCALE command is used when performing a calibration. At full-scale reference primary current, this command calculates and stores the proper positive and negative gain values. The calculated gains are stored automatically and can be read back with the GAIN command (GAIN:POS:? / GAIN:NEG:?).

Warning

This command overwrites the factory calibration data. It is therefore to be used only in special cases, and it can be used only after having unlocked the password protection with the PASSWORD command, in order to avoid accidental calibration loss.

Calibration is performed separately for positive and negative current: the first argument of the command is the primary current direction, the second argument is the reference current measurement value.

Command Format:

R/W	Command	Response	Description
W	SCALE:POS:<current>	ACK / NAK:x	Calculate the calibration parameters for positive current
W	SCALE:NEG:<current>	ACK / NAK:x	Calculate the calibration parameters for negative current

Parameter(s):

Name	Type	Description
<current>	float	Reference current measurement in Ampere [A]

Note

If the password protection has not been unlocked, the unit replies with error code 23 (Password required); see List of the Error Codes.