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Chapter 4 Remote Interface Reference
Calibration Commands
96
Calibration Commands
See chapter 3 ‘‘Calibration Overview’’, starting on page 66 for an overview
of the calibration features of the power supply. For more detailed discussion
of the calibration procedures, see the Service Guide.
Note
When you calibrate the power supply, you should not set the OVP and OCP
to ON state in order to prevent OVP or OCP from tripping.
CALibration:COUNt?
This command queries the power supply to determine the number of times it
has been calibrated. Your power supply was calibrated before it left the factory.
When you receive your power supply, read the count to determine its initial
value. Since the value increments by one for each calibration point, a complete
calibration will increase the value by 5 counts.
CALibration:CURRent <numeric value>
This command can only be used after calibration is unsecured and the output
state is ON. It enters a current value that you obtained by reading an external
meter. You must first select the minimum calibration level (
CAL:CURR:LEV
MIN
) for the value being entered. You must then select the middle and
maximum calibration levels (
CAL:CURR:LEV MID
and
CAL:CURR:LEV MAX
) for the value being entered. Three successive values must be selected and
entered. The power supply then computes new calibration constants. These
constants are then stored in non-volatile memory.
CALibration:CURRent:LEVel {MINimum | MIDdle|MAXimum}
This command can only be used after calibration is unsecured and the output
state is ON. It sets the power supply to a calibration point that is entered with
CAL:CURR
command. During calibration, three points must be entered and the
low-end point (MIN) must be selected and entered first.
CALibration:CURRent:PROTection
This command calibrates the overcurrent protection circuit of the power
supply. It takes about 7 seconds to execute the command. The calibration must
be unsecured and the output shorted before calibrating the overcurrent
protection. The power supply automatically performs the calibration and
stores the new overcurrent constant in nonvolatile memory. Notice that
current calibration precedes before sending this command.