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Operation
Proceed as follows for automatic zeroing:
Plug the cable set (or other lead set/fixture) into the front panel TEST connector.
Short the two clips of the 1880 test leads (or other lead set/fixture) together. The P+,
P- should be shorted directly together and I+, I- shorted together. When using the
1880 Cable Set, Figure 2-1 shows how the leads should be positioned to accomplish
this, i.e. the clips should be symmetrically positioned with the incoming cables on the
same side.
Cable
Cable
Red
Black
P+
I+
P-
I-
Right
Way
Cable
Cable
Black
Red
P+
P-
I+
I-
Wrong Way
Figure 2-1: Test Lead Positioning for Zeroing
Keep hands clear of the shorted leads or fixture and press the [ZERO] button on 1880
front panel. The zero correction is measured, stored and applied to all measurements
as long as the ZERO light (red) remains on.
If [ZERO] is turned off (red light out) this correction is lost and no longer applies.
NOTE
When ranging other than AUTO is chosen, zeroing should be performed on the selected
range to ensure measurement accuracy.