HP E1418A - Manual (Page 160)

Current Adjustment
Current output uses an internal resistance value to calibrate all channels.
This resistance value is approximately 244
Ω
.
Note You may also use an external resistance value on each channel for current
output calibration. If you wish to specify an external resistor value, you
must send the
DIAGnostic:CALibration:OUTPut CHANnel command and
perform the adjustment at each channel output. Any resistor value may be
used but values in the range of 50
Ω
to 500
Ω
are recommended.
To set the internal resistance value use the following CALibration
commands:
CALibration:CONFigure:RESistance?
CALibration:VALue:RESistance
The resistance value set, either internal or external, is not stored.
When using the internal resistor value, the general procedure is:
1. Make the connections shown in Figure D-4.
2. Send the CALibration:CONFigure:RESistance? query to the module
and read the response until a 1 is returned (typically the first query
response).
3. Read the resistance on the DMM.
4. Send the DMM value read to the module using the
CALibration:VALue:RESistance command.
The resistor value is only set once for current calibration of all channels.
If you are using an external resistor value, for each channel:
1. Send the CALibration:CONFigure:RESistance? query to the module
and read the response until a 1 is returned (typically the first query
response).
2. Measure the channel’s external resistor value on the DMM.
3. Send the DMM value read to the module using the
CALibration:VALue:RESistance command.
159 Voltage/Current Output Adjustment Appendix D
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