Inrush Function; Rel/Hz Button; Rel Function - Sonel CMP-3000 Manual De Uso

6.2.2 INRUSH function

The INRUSH function captures the starting current precisely in
the beginning of 106-millisecond period when the device is just
started, To perform the measurement:
 activate the AC measurement,
 briefly press INRUSH/PEAK button,
 fasten the clamp on the cord supplying power to the tested object,
 turn ON the tested object,
 read the results.

6.3 REL/Hz button

6.3.1 REL function

This mode enables a measurement relative to a reference value.
 To enable the mode, press REL/Hz. Then, the displayed readout
value is taken as the reference value, and the readout will be re-
set.
 From this moment, the readings will be presented as the ratio of
the measured value to the reference value.
 To enable the mode, press REL/Hz.
The displayed main result is the difference between the reference
value (read-out at the moment of activating REL mode) and the cur-
rent read-out. Example: if the reference value is 20 A, and the cur-
rent reading is 12.5 A, then the main result on the display will be
-7.5 A. If the new reading is identical to the reference value, then
the result will be zero.
 When the function is activated, the automatic adjustment
of the measuring range is not available.
 If the reading is outside the measurement range, symbol
OL is displayed In this situation, turn off the function and
manually switch to a higher range.
 This function is not available for diode test.
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CMP-3000 – USER MANUAL