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Performance and Calibration Procedures
87
5. Set the ammeter to the 1A range, and record the output current
reading on the ammeter. The ammeter reading should be within the
limits specified in the test record card under Voltage Priority
Programming Accuracy + 0.5A Current limit. The
difference between
the ammeter reading and the measurement query result should be
within the limits specified under Readback Accuracy + 0.5A current.
6. Turn off the output and connect a 1k 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)”
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.
Negative Current Limit (-CL)
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 output voltage to
−10 volts.
(The default output current limit is set to 1mA.)
“OUTP ON,(@1)”
“VOLT −10,(@1)”
3. Set the ammeter to the 1mA range, and record the output current
reading on the ammeter. The ammeter reading should be within the
limits specified in the performance test record card under Voltage
Priority Programming Accuracy
−1mA Current limit.
4. Program the output current limit to 0.5A. Measure the output current.
“CURR:LIM 0.5,(@1)”
“MEAS:CURR? (@1)”
5. Set the ammeter to the 1A range, and record the output current
reading on the ammeter. The ammeter reading should be within the
limits specified in the test record card under Voltage Priority
Programming Accuracy
−0.5A Current limit. The difference between
the ammeter reading and the measurement query result should be
within the limits specified under Readback Accuracy
−0.5A current.
6. Turn off the output and connect a 1k 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)”