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Note
Chapter 5
Current output adjustment uses two of the CALibration subsystem queries.
Current adjustment requires voltage measurements.
CALibrationn:CONFigure:CURRent?
CALibrationn:VALue:CURRent? <value>
The current adjustment procedure measures and inputs a voltage value
developed across a known resistor value (set at the start of the procedure).
Once the calibration resistance value is set as described earlier, the general
procedure for each channel current output adjustment is:
Make the connections shown in figure 5-6 or 5-7.
1.
Send the CAL n :CONF:CURR? query to the module and read the
2.
response until a 1 is returned (typically the first query response).
Read the voltage on the DMM.
3.
Send the DMM value read with the CAL n :VAL:CURR? < value >
4.
query.
Enter the query response.
5.
Repeat steps 3, 4, and 5 until the CAL n :VAL:CURR? < value >
6.
query returns a 0.
Repeat steps 1 through 6 for each channel.
7.
The first query, CAL n :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 voltage on the DMM and return the value obtained using the
CAL n :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.
Each channel will require multiple iterations of the CAL n :VAL:CURR?
< value > query. A minimum of 9 queries, to a maximum of 50 queries, will
be required at each channel. During the process, the output voltage will
range from -5 to +5 V and the last values output will be at or near 0 volts.
Adjustments 67
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