Pro's Kit MT-2207 - Decibels Measurement; Capacitance Measurement; TROUBLESHOOTING

8
Decibels Measurement
1. Set the selector switch to AC 10V range.
2. Connect the BLACK test lead to the “-COM” jack and the RED test lead to the
Red “+” jack.
3. Connect the test leads to the measuring circuit specially in series with a
0.047μF/400V Metalized Polyester Capacitor. And then read the bottom Red
dB scale.
4. For more dB scope, change the selector switch to the others of ACV ranges
and make the same actions. Add the appropriate number of dB scale reading
as noted on the chart below.
NOTE: For absolute dB measurements, circuit impedance must be 600 Ohm. 0
dB = 1mw dissipated in a 600 Ohm impedance (equivalent to 0.755V across 600
Ohm)
ACV RANGE
ADD dB Number
50
14
250
28
500
34
1000
40
Capacitance Measurement
WARNING: DO NOT APPLY VOLTAGE TO MEASURING TERMINAL WHILE
MAKING ANY CAPACITANCE MEASUREMENTS.
BEFORE TESTING ANY CAPACITORS, DISCHARGE THE CAPACITOR
COMPLETELY.
1) Set the selector switch to the C X1/X10/X100/X1K/X10K(R
X10K/X1K/X100/X10/X1) range.
2) Connect the BLACK test lead to the “-COM” jack and the RED test lead
to the Red “+” jack.
3) Connect the test leads to the capacitor to be measured (Note the polarity
of capacitor).
4) Watch the needle deflection to the right topside, and read the Red
C2000uF scale on the Dial.
TROUBLESHOOTING
Nevertheless, problems or malfunctions may occur.
For this reason, the following is a description of how you can eliminate possible
malfunctions yourself:
Error
Possible cause
The multimeter does not
work.
Are the batteries exhausted?
Check the state of the batteries and the
fuse 0.5A.
No measurements
possible via V/mA
socket.
Is the fuse defective? Check the fuse 0.5A
(fuse replacement)