Velleman AVM360 User manual

AVM360
Analog multimeter
OPERATION MANUAL
GEBRUIKERSHANDLEIDING
MANUEL D’UTILISATEUR

AVM360 GB1
AVM360
Analogue Multimeter
1. Description
Your AVM360 is a professional analogue multimeter. It is ideally suited for field,
lab, shop, and home applications.
It is capable of performing functions :
DC Voltage AC Voltage DC Current
Resistance Transistor Iceo test Transistor hFE test
Diode test
1.1 Warning
Use extreme caution in the use of this device. Improper use of this device can
result in injury or death. Follow all safeguards suggested in this owner’s manual in
addition to normal safety precautions in dealing with electrical circuits. Do not
use this device if you are unfamiliar with electrical circuits and testing
procedures.
1.2 A word about safety
This multimeter is designed to ensure the safest operation possible. However, safe
operation depends on you, the operator. Make sure you follow these simple safety
rules :
lNever apply a voltage to the multimeter that exceeds the limits given in the
specifications. Never apply more than 1000V DC or 1000V rms AC between
an input jack and ground.
lUse extreme caution when working with voltages above 60V DC or 30 V AC
rms.
lAlways discharge filter capacitors in the power supply circuit under test
before you attach test leads.
lNever connect to a source of voltage when you select the resistance
measurement.
lAlways turn off power and disconnect the test leads before you replace the
batteries or fuse.
lNever operate the multimeter unless the battery cover is in place and fully
closed. When carrying out measurements on television or switching power
circuits, always remember that there may be high amplitude voltages pulses
at test points which can damage the meter.
1.3 Maintenance

AVM360 GB2
Your AVM360 is an example of superior design and craftsmanship. The
following suggestions will help you care for the multimeter so you can enjoy it for
years :
lKeep the multimeter dry. If it gets wet, wipe it dry immediately.
lUse and store the multimeter only in normal temperature environments.
Temperature extremes can shorten the life of electronic devices or damage
batteries.
lHandle the multimeter gently and carefully. Dropping it can damage the
circuit boards and case and can cause the multimeter to work improperly.
lUse only fresh batteries of the required size and type. Always remove old or
weak batteries.
If you do not plan to use the multimeter for a month or more, remove the
batteries. This protects the multimeter from possible leakage.
lDisconnect the test probes before opening the multimeter.
lReplace blown fuse only with same size and type :
F 1.5A / 250V
lIf any faults or abnormalities are observed, do not use this device and let it
check by authorised personnel.
lNever use the meter unless the back cover is in place and fastened fully.
lTo clean the meter, use a damp cloth and mild detergent only, do not use
abrasives or solvents.
2. Description of the meter

AVM360 GB3
Indicator zero corrector
ôRange selector switch knob
íMeasuring terminal +
÷Measuring terminal - COM (common)
ûOUTPUT (series condenser) terminal
ø0 Ωadjusting knob
ùPanel
îIndicator Pointer
üRear case bolt
êRear case
3. Reference table for reading

AVM360 GB4
Test Range Position Scale to read Multiplier
DC 0.1V B 10 x 0.01
0.5V B 50 x 0.01
2.5V B 250 x 0.01
DC Volt 10V B 10 x 1
50V B 50 x 1
250V B 250 x 1
1000V B 10 x 100
AC 10V C 10 x 1
AC 50V B 50 x 1
Volt 250V B 250 x 1
1000V B 10 x 100
DC 50 µA B 50 x 1
DC 2.5 mA B 250 x 0.01
Current 25 mA B 250 x 0.1
0.25 A B 250 x 0.001
x 1 A x 1
x 10 A x 10
Resistance x 100 A x 100
x 1 K A x 1000
x 10 K A x 10000
AC 10 V G x 1
Decibel 50 V G x 1 + 14 dB
250 V G x 1 + 28 dB
x 1
Iceo x 1 E (for big TR)
x 10 E x1
(for small TR)
hFE x 10 D x1
x 1K E µA x 10
Fx1
x 100 E µA x 100
Diode F x 1
x 10 E mA x 1
Fx1
x 1 E mA x 10
Fx1

AVM360 GB5
4. Operating instructions
4.1 Ωtest
1. Plug the test leads into COM and + sockets.
2. Place the range selector to a prescribed range position.
3. Short the test leads and turn 0ΩADJ to set the pointer to zero position.
4. Make sure that there is no voltage across the circuit to be tested.
5. Connect the test leads to the tested resistor and read the scale in accordance
with the reference table.
4.2 DCV test
1. Plug the red test lead into the + socket and the black one into the - COM.
2. Set the range selector to a selected DCV range position.
3. Connect the red test lead to the positive polarity of the circuit tested and the
black one to the negative.
4. Read the DCV.A scale referring the reference table.
4.3 ACV test
1. Plug the red test lead into the + socket and the black into the - COM socket.
2. Set the range selector to a chosen ACV range position.
3. Connect the test leads to the circuit being tested regardless of the polarities.
4. Read ACV scale with the reference table.
4.4 DCA test
1. Place the red test lead into the + socket and the black in the - COM.
2. Set the range selector at a selected DCA range position.
3. Connect the red test lead to the positive polarity of the circuit tested and the
black into the negative.
4. Read the DCV.A scale converted with the reference table.
4.5 ACV test on output terminal
1. Plug the red test lead into the OUTPUT socket and the black one into the -
COM.
2. Set the range selector at the selected range position. Connect the test leads to
the circuit to be tested and read the scale in the same manner as ACV test. Such
a measurement is made to block the DC voltage which is present in the same
circuit and must be cut out so that AC voltage can be read alone.
4.6 Iceo transistor test

AVM360 GB6
1. Plug the test leads into + and - COM sockets.
2. Set the range selector to x10 (15mA) for small size transistor, or to x1 (150mA)
for big size transistor.
3. Adjust 0ΩADJ to set the pointer to zero position of the Ωscale.
4. Connect the transistor with the tester :
For NPN transistor, the "N" terminal of the tester is connected with the
COLLECTOR (C) of the transistor and the "P" terminal with the EMITTER
(E) of the transistor.
For PNP transistor, reverse the NPN transistor connection.
5. Read Iceo range. If the pointer is within the LEAK zone or the pointer moves
up near the full scale, the tested transistor is not good. Otherwise it is a good
transistor.
4.7 hFE (DC amplification) transistor test
1. Set the range selector to x 10.
2. Adjust 0ΩADJ to adjust the pointer to zero position.
3. hFE (DC amplification) test.
4. Read the hFE scale. The value of the reading is Ic / Ib, which is the DC
amplification degree of the tested transistor.
For NPN transistor For PNP transistor

AVM360 GB7
4.8 Diode test
1. Set the range selector at selected range position :
x 1K for 0 - 150 µA test,
x 100 for 0 - 1.5 mA test,
x 10 for 0 - 15 mA test,
x 1 for 0 - 150 mA test.
2. Connect the diode to the tester.
For IF(forward current) test, connect the "N" terminal of the tester to the
positive polarity of the diode and the "P" terminal to the negative polarity of the
diode. For IR(reverse current) test, reverse the connection.
3. Read IFor IRone the LI scale provided.
4. Read the linear (forward) voltage of the diode on the LV scale while testing IF
or IR.
5. Specifications
5.1 DC Voltage
Ranges : 0.1 - 0.5 - 2.5 - 10 - 50 - 250 - 1000 V
Accuracy at FSD : 3
Sensitivity : 20 kΩ/ V
Extension : 25 kV (with HV probe extra)
5.2 AC Voltage
Ranges : 10 - 50 - 250 - 1000 V
Accuracy at FSD : 4
Sensitivity : 9 kΩ/ V
Decibelmeter : -10 to +22 dB
0 dB = 1mW / 600 Ω
5.3 DC Current
Ranges : 50 µA (at 0.1 VDC position) - 2.5 mA - 25 mA - 0.25 A
Accuracy at FSD : 3
Volt Drop : 250 mV

AVM360 GB8
5.4 Resistance
Ranges :
x 1 - 0.2 Ωup to 2 kΩ, midscale, at 20 Ω
x 10 - 2 Ωup to 20 kΩ, midscale, at 200 Ω
x 100 - 20 Ωup to 200 kΩ, midscale, at 2 kΩ
x 1k - 200 Ωup to 2 MΩ, midscale, at 20 kΩ
x 10k - 2 kΩup to 20 MΩ, midscale, at 200 kΩ
Accuracy at FSD : 3
5.5 General
Iceo 150 µA - 1.5 mA - 15 mA - 150 mA
hFE 0 -1000 (with extra connector)
Size : 148 x 100 x 35 mm
Weight : approx. 280g
6. Accessories
Test leads
Battery (9V)
Operating manual
7. Battery and fuse replacement
Remove screw on the back cover and open the case. Replace the exhausted
battery with a new one.
Fuse rarely needs replacement and blows usually as a result of the operator's error.
Open the case as mentioned above and replace the blown fuse with ratings
specified : F 1.5 A / 250 V
Remark :
Before attempting to open the case, be sure that the test leads have been
disconnected from measurement circuit to avoid electric shock.