Figure D-4. Resistance Calibration Connections (CAL)

Current output adjustment uses two of the CALibration subsystem queries. Current adjustment requires voltage measurements.

CALibrationn:CONFigure:CURRent?

CALibrationn:VALue:CURRent? <value>

Once the calibration resistance value is set as described earlier, the general procedure for each channel current output adjustment is:

1.Make the connections shown in Figure D-5 or D-6.

2.Send the CALn:CONF:CURR? query to the module and read the response until a 1 is returned (typically the first query response).

3.Read the voltage output on the DMM.

4.Send the DMM value read with the CALn:VAL:CURR? <value> query.

5.Enter the query response.

6.Repeat steps 3, 4, and 5 until the CALn:VAL:CURR? <value> query returns a 0.

7.Repeat steps 1 through 6 for each channel.

The first query, CALn:CONF:CURR?, sets the channel to the calibration mode and returns a 1 when the channel is ready for calibration. When a 1 is returned, the channel output voltage is set to the first adjustment point.

Read the output voltage on the DMM and return the value obtained using the CALn:VAL:CURR? <value> query. This query returns an integer indicating the calibration state of the channel. A value other than 0 or 2 from this query indicates additional values are needed.

Appendix D

Voltage/Current Output Adjustment 160

Page 160
Image 160
HP E1418A manual Figure D-4. Resistance Calibration Connections CAL