Copyrights 2000 – 2012, Analog Technologies, Inc. All Rights Reserved. Updated on 11/22/2012
7
Analog Technologies
VC97
Multimeter
2352 Walsh Ave. Santa Clara, CA 95051. U. S. A. Tel.: (408) 748-9100, Fax: (408) 748-9111 www.analogtechnologies.com
Note
1. Don’t input voltage and current signal in the “V
Ω
Hz”
jack when measuring the capacitor.
2. Be sure to press “REL” to clear zero before measuring.
3. Capacitance range only has auto range working mode.
4. Release the capacitors completely to avoid damaging
the meter
5. 200uF range input reading steady large than 15 Sec.
6. Unit: 1uF=1000nF 1nF=1000pF
Frequency Measurement
1. Insert the black leads to “COM” socket and the red
one to “V
Ω
Hz” socket.
2. Set the range switch to “Hz” range.
3. The range is auto-range. Connect the leads across to
the signal under measured, the value will be displayed
on LCD.
Note
1. There is only auto-range at this range.
2. When input is over 10V Ac rms, reading is possible,
but maybe over-range.
3. It’s better to use shield cable when measuring small
signals in noisy place.
4. Be careful when measuring high voltage.
5. Do not input voltage over 250V DC/AC peak value.
hFE Measurement
1. Set the function switch to hFE range.
2. Define the transistor is NPN or PNP type. Insert
theemitter, base and collector separately to the correct
hole, then the approx. value will be displayed on
LCD.
Diode and Continuity Test
1. Insert the black leads to “COM” socket and the red
one to “V
Ω
Hz” socket (the polarity of the red one is
“+”).
2. Set the FUNCTION switch to “
” position. Press
“DC/AC” key to select diode measuring.
3. Forward measurement: connect the red test leads to the
“+” polarity of the diode under tested and the black
one to “-”, the approx. forward voltage of this diode
will be displayed on LCD.
4. Backward measurement: connect the red test lead to
the “-” of the diode and the black one to “+”, and LCD
will displayed OL. The completely measurement
includes forward and backward measurement, if the
result cannot meet with the above, it means the diode
is workless.
5. Diode test include forward measurement and backward
measurement, if the result is different with above, the
diode is bad.
6. Press “DC/AC” key to select continuity test.
7. Continuity test: the buzzer sounds when the resistance
under measured is less than (70+10)
Ω
.
Note
1.
Do not input voltage at this range.
2.
Turn off the power and release all capacitors when
testing in line.
Temperature Measurement
1. Set the function switch to “ ” range.
℃
2. Insert the cold point of thermocouple too “Temp”
socket and the working point to the place wanted to
take temperature, the value will be displayed on LCD.
Note
1. When the input terminal is in open circuit, it will
display the “normal temp”.
2. Do not change the thermocouple, or the accuracy
cannot be secured.
3. Do not input voltage at this range.
Data Hold
Press “HOLD” key once, the current data will be hold on
LCD; press it again, data is canceled.
Auto Power Off
1. When operating after 15 minutes, the meter will be
auto power off and into sleep mode. Press “POWER
AUTO OFF” key twice can turn the power on.
2. Press “DC/AC” key before turn on, it can cancel auto
power off function.
MAINTENANCE
Do not try to modify the inner circuit.
Note
1. Do not input a voltage over 1000V DC/AC peak value.
2. Do not measure voltage at current range, resistance
range, diode and buzzer range.
3. Do not use the meter if the battery is not replaced well
or the battery case is not fixed.
4. Before replacing battery or fuse, release the test leads
from the test point and turn power off.
