B - Performance Test and Calibration
Performance Tests
IMON Zero Verification
This test verifies that IMON Zero is within calibration. IMON zero must be in calibration to perform the tests in this section. If the IMON value is not within calibration, go to the calibration section of this appendix and calibrate IMON zero, IPROG, current programming and readback and resistance programming and readback. See figure
Action
1.Turn off load module and connect DVM to IMON as per figure
2.Turn on Load – press [ Recall } – scroll to *RST – press [Enter ]
3.Read IMON voltage from DVM.
4.If IMON in step 3 in not within specification then calibrate IMON zero, IPROG, Current mode and Resistance mode.
Normal Result
Voltage reading less than 0.166mV for models N3302A through N3305A Voltage reading less than 0.320mV for model N3306A
CC Mode Tests
These tests verify that the module operates in the CC mode and that IMON, current programming, and readback to the front panel display are within specification. Values read back over the GPIB are the same as those displayed on the front panel. To read back the current value via the GPIB, use MEAS:CURR:ACDC?
Current Programming and Measurement Accuracy Test
This test verifies that the current programming and measurement accuracy are within specification. If the test readings are out of tolerance the module may require calibration. If the test readings significantly disagree with the specified values or no readings can be obtained go to the
Make a copy of the module test card for the model to be tested to record test values.
1. | Connect the Electronic Load, power source, DVM and current shunt as shown in figure |
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2. | Turn on the Electronic Load and press [ Recall ]. Scroll until display reads *RST and press [ Enter ]. | ||||||||||||
3. | Turn on the power source. Set the power source voltage and current to the values listed in the following table. | ||||||||||||
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| N3302A |
| N3303A |
| N3304A | N3305A | N3306A | ||||
| Power Source Voltage Setting | 5V |
| 20V |
| 5V | 8V | 5V |
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| Power Source Current Setting | 33A |
| 12A |
| 61A | 61A | 130A |
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4. | Checking high current range, Low input current. Press [ CURR ] [ 1 ] then [ Enter ]. Wait 10 seconds then record the | ||||||||||||
| actual input current ( DVM reading / current shunt resistance ) and front panel current reading on the test card under | ||||||||||||
| high current range low current. |
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5. | Checking high current range, maximum input current. Press [ CURR ] [ select current from following table] [Enter ]. | ||||||||||||
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| N3302A | N3303A |
| N3304A |
| N3305A |
| N3306A |
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| 30 | 10 |
| 60 |
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| 60 |
| 120 |
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Wait 30 seconds, then record the actual input current ( DVM reading / current shunt resistance ) and front panel current reading on the test card under high current range high current.
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