Agilent Technologies N3280A manual Negative Current Limit -CL, Action Program Commands

Performance and Calibration Procedures

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.

7.Turn on the output and program the 15mA current readback range. Measure the output current.

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.

10.Turn on the output and program the 0.5mA current readback range. Measure the output current.

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.

“OUTP OFF,(@1)”

“OUTP ON,(@1)” “SENS:CURR:RANG 0.015,(@1)” “MEAS:CURR? (@1)”

“OUTP OFF,(@1)”

“OUTP ON,(@1)” “SENS:CURR:RANG 0.0005,(@1)” “MEAS:CURR? (@1)”

Negative Current Limit (-CL)

Action	Program Commands
1. Reset the dc source and connect an ammeter directly across the HI and	“*RST”
LO terminals as shown in Figure B-1a.
(*RST resets the dc source to its default settings with the output off.)

2.Turn on the dc source and program the output voltage to −10 volts. (The default output current limit is set to 1mA.)

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.

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.

“OUTP ON,(@1)” “VOLT −10,(@1)”

“CURR:LIM 0.5,(@1)” “MEAS:CURR? (@1)”

6. Turn off the output and connect a 1k ohm resistor in series with the	“OUTP OFF,(@1)”
ammeter across the output as shown in Figure B-1c. You do not need
a shorting switch.

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