I> Threshold And Drop-Off - ISA T1000 PLUS User Manual

DOC. MIE91093 Rev. 1.34 Page 19 of 145
. Set the save function, as follows.
Test control > Save > Confirm at trip > ESC
. Set the timer with the following selections:
Timer start/stop > START > INT (RET)
STOP > EXT > Clean (Voltage) (RET)
Edge ESC
NOTE: stop clean or voltage according to the relay trip contact
connections.
1.1.3. I> Threshold and drop-off
The first session is finding threshold I>. Select ON; slowly
increase the current. As the relay trips, pressing the multi-
function knob tripping values can be saved. The TRIP LED (43)
turns on for 5 seconds; during 5 seconds, parameters at trip
are displayed; then, the standard measurement is restored.
Confirm save results pressing the multi-function knob, and
proceed.
NOTE: stored value is the current as the relay trips. This
corresponds to the relay threshold only if the current did not
change very much while the relay timing elapsed, so current
should be increased quite slowly. A more accurate threshold