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B - Performance and Calibration Procedures
88
7.
Turn on the output and program the
15mA current readback range.
Measure the output current.
“OUTP ON,(@1)”
“SENS:CURR:RANG 0.015,(@1)”
“MEAS:CURR? (@1)”
8. Set the ammeter to the 10mA range, and record the output current
reading on the ammeter. The
difference between the ammeter reading
and the measurement query result should be within the limits specified
Readback Accuracy
−15mA Current Limit.
9. Turn off the output and connect a 20k ohm resistor in series with the
ammeter across the output as shown in Figure B-1c. You do not need
a shorting switch.
“OUTP OFF,(@1)”
10.
Turn on the output and program the
0.5mA current readback range.
Measure the output current.
“OUTP ON,(@1)”
“SENS:CURR:RANG 0.0005,(@1)”
“MEAS:CURR? (@1)”
11. Set the ammeter to the 1mA range, and record the output current
reading on the ammeter. The
difference between the ammeter reading
and the measurement query result should be within the limits specified
Readback Accuracy
−0.5mA Current Limit.
Current Priority Tests
Current Programming and Readback Accuracy
NOTE: The voltage limits in Current Priority Mode are not programmable.
Action Program Commands
1. Reset the dc source and connect an ammeter directly across the HI and
LO terminals as shown in Figure B-1a.
(*RST resets the dc source to its default settings with the output off.)
“*RST”
2. Turn on the dc source and program the Current Priority mode.
(The default output current is set to 0A.)
“OUTP ON,(@1)”
“SOUR:FUNC:MODE CURR,(@1)”
3.
Set the ammeter to the 1
µA range, and record the output current
reading on the ammeter. The reading should be within the limits
specified in the performance test record card under Current Priority
Programming Accuracy @ 0A.
4. Program the output current to 0.5mA. Measure the output current.
“CURR 0.0005,(@1)”
5. Set the ammeter to the 1mA range, and record the output current
reading on the ammeter. The reading should be within the limits
specified in the performance test record card under Current Priority
Programming Accuracy @ 0.5mA.
6.
Program the output current to
−0.5mA. Measure the output current.
“CURR -0.0005,(@1)”
7. Set the ammeter to the 1mA range, and record the output current
reading on the ammeter. The reading should be within the limits
specified in the performance test record card under Current Priority
Programming Accuracy @
−0.5mA.