5.5 Decibel
1) The red test lead must be connected to jack “
V.
Ω
.A” (10).
2) Set the range switch (1) to one of the ranges “AC V”, the best
way is to start with the 1000 V range.
3) In the lowest range 10 V~ (MT-200) resp. 12 V~ (MT-300) the
measuring value can directly be read from the red scale “dB”. In
the other ranges a dB value from the table (6) in the scale win-
dow must be added to the reading value, according to the AC
range adjusted, example:
Reading value =
12 dB
Range =
1000 V~ (add 40 dB according to table)
Measuring value =12 dB + 40 dB = 52 dB
Note: 0 dB corresponds to 1 mW = 0.775 V at 600
Ω
.
5.6 Battery test
1) The red test lead must be connected to jack “
V.
Ω
.A“ (10).
2) Set the range switch (1) to the following position:
1.5V with a battery of AA size
9V
with a 9 V battery
3) Hold the red test lead tip to the positive pole of the battery and
the black to the negative pole.
4) At the lowest scale “BAT” read the battery state:
green area “GOOD” =
battery is o.k.
white area “?” =
battery is almost exhausted
red range “REPLACE” = battery is exhausted
For the test the battery is loaded with 20 mA (MT-200) resp.
27 mA (MT-300).
5.7 Transistor test (with model MT-300 only)
1) Set the range switch (1) to position “TR”. Both LEDs in field “TR”
are blinking.
2) Plug a transistor according to its connections (E, B, C) into the
plug connections (3).
3) If the transistor is o. k., either the red LED (PNP type) or the
green LED (NPN type) is blinking. With a defective transistor
either both LEDs are blinking or none.
Note: If with the activated function “TR” and without connected
GB
17
