Testing Diodes; Testing Batteries; Data Hold Function; Activating The Display Illumination - Monacor DMT-2004 Instruction Manual

5.5 Testing diodes

•
Never measure a diode when voltage is applied; always measure it
separately, otherwise the measurement will be inaccurate . For this pur-
pose, it may be necessary to solder the diode out of the circuit .
Set the selector switch (4) to the position
to the cathode of the diode and the red test tip to the anode . With a
measurement current of 1 mA max ., the forward voltage up to 1 .999 V
will be displayed .
If a value around 0 V is displayed, the diode has a short circuit .
If "1" is displayed, the diode is interrupted, connected in reverse direc-
tion (reverse the polarity of the diode) or has no contact to the test tips .

5.6 Testing batteries

It will be possible to test 1 .5 V and 9 V batteries . According to the battery
type, set the switch (4) to the position "1 .5V" or "9V" . Apply the black
test tip to the negative pole and the red test tip to the positive pole of
the battery . The battery voltage will be displayed .
Battery type
9 V battery
1 .5 V battery

5.7 Data hold function

It will be possible to hold a measured value on the display, e . g . to be
able to read the value more easily when the test tips have been removed
from the object to be measured . For this purpose, press the button
"HOLD" (2) . "HOLD" will appear on the display . To return to the present
value, deactivate the function with the button "HOLD" ("HOLD" will
disappear) .

5.8 Activating the display illumination

To activate the display illumination, press the button
it, press the button once again .
high
> 8 .2 V
> 1 .35 V
. Apply the black test tip
Charge status
weak
7 .2 V to 8 .2 V
1 .22 V to 1 .35 V
low
< 7 .2 V
< 1 .22 V
(3) . To deactivate
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