press the RANGE button - the "Auto Range" display indicator
will turn off,
press the RANGE button to step through the available ranges
until you select the range you want,
press and hold the RANGE button for 2 seconds to exit the
ManualRanging mode and return to AutoRanging.
6.2
Relative mode
Press REL button to enter the relative mode, the REL indicator
turns on, zero the display, and stores the displayed reading as a
reference value.
In the relative mode, the value shown on the LCD is always the
difference between the stored reference value and the present
reading. For example, if the reference value is 24,00V and the pre-
sent reading is 12,50V, the display will indicate -11,50V. If the new
reading is the same as the reference value, the display will be zero.
Press the REL button again to exit the relative mode.
6.3
DATA HOLD Function and Backlight
display
To freeze the LCD meter reading, press the HOLD button. The
data hold button is located on the left side of the meter (top button).
While data hold is active, the HOLD display icon appears on the
LCD. Press the data hold button again to return to normal
operation.
Press and hold the HOLD button key for more than 2 seconds
to turn on the backlight. This will also activate the Data Hold
function. To release the Data Hold function and return the tester to
normal operation, press the HOLD button momentarily. To turn off
the backlight, press and hold the HOLD button for more than 2
seconds.
6.4
MODE button
The MODE button is used for DC/ACV or OHM/Diode/Conti-
nuity selection.
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CMP-400 – USER MANUAL