Interface Page 49 of 76
2.7 Measurement Procedure
Before a measurement is made verify the following:
1. 1855 instrument [POWER] ON.
2. 15-minute warm-up.
3. Test parameters programmed and shown on MEAS DISPLAY.
4. Test cables or fixture connected.
5. NULL function initiated.
6. Device under test connected.
To initiate a test:
• Press [TRIGGER].
• The test voltage is shut off when all test steps are completed,
• OR when a test result is judged a FAIL per programmed test limits.
• The test result is displayed on MEAS DISPLAY
NOTE:
If for any reason the output must be terminated during a test, press the right arrow marked
“DISCHARGE”.
The 1855 instrument judges the measurement value based on the COMPARE function set up
previously. Refer to paragraph 2.4.5 for instructions on setting the COMPARE Pass/Fail
judgment parameter. Upon completion of the test the output voltage is terminated and the display
shows the test result.
CAUTION:
Before touching the DUT or the 1855 instrument, make sure all capacitive devices have been
fully discharged.
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