User manual

Section 13: Instrument Control Library (ICL) Series 3700 System Switch/Multimeter Reference Manual
13-34 3700S-901-01 Rev. C / July 2008
channel.calibration.step()
Remarks
The specified channel must be on the unlocked slot. Only DAC and totalizer channels
can be calibrated. It is best to calibrate a single channel sequentially to completion
before changing channels.
The card assumes that the given voltage or current value is exactly what it is sourcing
for the given step. This command generates an error if the step is out of sequence,
does not exist, or the calibration is locked. Also, an error is generated if the calibration
step does not complete successfully, if the value passed is invalid or out of range for
the step, or not needed.
For DAC channels, a calibration sequence includes these steps:
1. Set Voltage, -12 to +12 range, generate Negative Point 1.
2. Send reading.
3. Set Voltage, -12 to +12 range, generate Negative Point 2.
4. Send reading.
5. Set Voltage, -12 to +12 range, generate Positive Point 1.
6. Send reading.
7. Set Voltage, -12 to +12 range, generate Positive Point 2.
8. Send reading.
9. Set Current, 0 mA to +20 mA range, generate Point 1.
10. Send reading.
11. Set Current, 0 mA to +20 mA range, generate Point 2.
12. Send reading.
13. Set Current, +4 mA to +20 mA range, generate Point 1.
14. Send reading.
15. Set Current, +4 mA to +20 mA range, generate Point 2.
16. Send reading.
For totalizer channels, a calibration sequence includes these steps:
1. Calibrate 0 V Totalizer Threshold
2. Calibrate 1.5 V Totalizer Threshold
channel.calibration.unlock()
Function
Unlocks calibration.
Usage
channel.calibration.unlock(<ch_list>, <password>)
ch_list: A string representing the slot holding the card to query.
password: A string of characters that protects the command.