DATREND Systems ES601-US, Operating Manual

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ES601-US OPERATING MANUAL
Manual Testing/Chapter 5
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Page 57
CALIBRATE
OFFSET:
The " OFFSET: " displayed to the right of this control is the resistance of the test
lead used in measuring point-to-point resistance. In a point-to-point test, the
OFFSET calibration is subtracted from the measured resistance to obtain the
result which is displayed by ES601-US.
Calibrate the
OFFSET
when required, particularly if the test lead used for point-
to-point measurement is changed. Performing the calibration from System
Settings Menu #2 (see Section 3.3) records the
OFFSET
in non-volatile memory.
Performing the calibration from the Sequence Controls menu updates the
OFFSET for the manual test, but does not store the calibration in the non-volatile
memory.
Calibrate the OFFSET according to this procedure:
1. Connect the Kelvin Cable to the corresponding jacks of ES601-US.
2. Connect the test lead which will be used for point-to-point
measurement to the "TO DUT CASE" jack of ES601-US.
3. Connect the free ends of the Kelvin Cable and the test lead together.
Verify a solid mechanical contact exists between the two cables at the
far end.
4. Press the CALIBRATE OFFSET button. The resistance will be
measured and displayed within one second.
5. The result should be 0.05 ohms or lower for a typical test lead of 2-
meter length. For best results, avoid use of a poor-quality or excessively
long cable having a resistance exceeding 0.1 ohm. ES601-US will
produce an alarm and reject the calibration if the resistance exceeds 3
ohms.
6. If the resistance seems unreasonably high, verify the connection
between the test lead and the Kelvin Cable. Also confirm the test lead
makes a solid contact when inserted into the "TO DUT CASE" jack.
Repeat the calibration as required until an acceptable result is obtained.
ESCAPE:
This button on the Sequence Controls menu aborts the test in progress and
returns the display to the MANUAL MODE menu.
NEXT:
Advances the test to the next step, which starts the resistance measurement.