Major tech MT832 Manuale utente
INSTRUCTION MANUAL
ANALOGUE MULTIMETER
MT832
2
3
Contents Page no
1. Features...........................................................................................4
2. Specifications....................................................................................4
2.1. Reference Table for Reading......................................................4
2.2. Range Specifications................................................................6
3. Meter Description..............................................................................7
4. Operation.........................................................................................7
4.1. Resistance Test........................................................................8
4.2. Continuity Test (Buzz and LED)..................................................8
4.3. DCV Test.................................................................................8
4.4. ACV Test.................................................................................9
4.5. Decibel...................................................................................9
4.6. DCA Test.................................................................................9
4.7. ACV Test on Output Terminal.....................................................9
4.8. Ieco (Leakage Current) Test....................................................10
4.9. hFE (DC Apmlification) Test.....................................................10
5. Battery Replacement........................................................................10
4
1. FEATURES
1. 8 Functions 20 measuring ranges.
2. Fuse and diode protection
3. Functions: AC/DC Voltage test, DC Current test, Resistance test,
Transistor test and hFE test
1. READ and UNDERSTAND all of the instructions and safety
information in this manual before operating or servicing this
instrument!
2. Keep this instruction manual handy all the time, it will help
you use this instrument easily in the future!
2. SPECIFICATIONS
2.1. REFERENCE TABLE FOR READING
5
0.1V
0.5V
2.5V
10V
50V
250V
1000V
10V
50V
250V
1000V
50μA
2.5mA
25mA
0.25A
x1
x10
x100
x1K
x10K
10V
50V
250V
x1
x10
x10
DC Voltage
AC Voltage
DC Current
Resistance
Decibel
lceo
hFE
B 10
B 50
B 250
B 10
B 50
B 250
B 10
C 10
B 50
B 250
B 10
B 50
B 250
B 250
B 250
A
A
A
A
A
G
G
G
E
E
D
Test Range Position Scale to Read Multiplyer
x0.01
x0.01
x0.01
x1
x1
x1
x100
x1
x1
x1
x100
x1
x0.01
x0.1
x0.001
x1
x10
x100
x1000
x10000
x1
x1 + 14dB
x1 + 28dB
x1 (For big)
x1 (For small)
x1
Note:
The letter "A" to "G" in Scale to Read, please refer to Fig.01
DC
AC
DC
AC
6
2.2. RANGE SEPCIFICATIONS
Function Range Accuracy
DC Voltage
AC Voltage
40 to 60Hz
Decibel Meter
DC Current
Resistance
Iceo
hFE
Standard
0.1-0.5-2.5-10-50
-250-1000V
Sensitivity: 20kΩ/V
Extension: 25kV*
10-50-250-1000V
Sensitivity: 9kΩ/V
-10 to +22dB
(0db=1mW/600Ω)
50μA (0.1V DC Position),
2.5mA, 25mA, 0.25A
x1:
0.2Ω up to 2kΩ,
Mid-scale at 20Ω
x10:
2Ω up to 20kΩ,
Mid-scale at 200Ω
x100:
20Ω up to 200kΩ,
Mid-scale at 2kΩ
x1k:
200Ω up to 2MΩ,
Mid-scale at 20kΩ
x10k:
2kΩ up to 20MΩ,
Mid-scale at 200kΩ
150μA-1.5mA -
15mA-150mA
0-1000
(With connection extra)
Full Scale Deflection: 3
(1000V:5)
Full Scale Deflection: 4
(1000V: 5)
Full Scale Deflection: 3
Full Scale Deflection: 3
Range Position
lEC61326 CATII 600V, Pollution degree II,
CE approved
*An extra high voltage probe is required for this test (probe not included)
7
1. Continuity Indicator
2. Reading Panel
3. Zero Corrector
4. 0Ω Adjusting Knob
5. Output Terminal (Series Condenser)
6. Function Switch
7. Measuring Terminal (-)/COM (COMMON)
8. Measuring Terminal(+)
9. Plastic Protection Cover
3. METER DESCRIPTION
4. OPERATION
WARNING:
1. Before using this instrument, please adjust the ZERO by Zero
Corrector.
2. When measuring the Resistance, make sure that there is no voltage
in the circuit.
3. ALWAYS turn the function switch to the OFF position when the meter
is not in use.
8
4.1. RESISTANCE TEST
1. Set the function switch to the highest Ω
position.
2. Insert the test leads into COM (Black lead)
and "+" socket (Red lead)
3. Short the test leads and turn 0Ω adjusting
knob 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
(Fig.01) and read the scale in accordance
with the reference table. Reset the function
switch to successively lower Ω positions to
obtain a higher resolution reading.
4.2. CONTINUITY TEST (BUZZ AND LED)
1. Plug the test leads into COM (Black lead) and "+" socket (Red lead)
2. Set the range function switch to BZ/CONT'Y position, apply the test
lead pins to two points to be tested. While tested circuit is continuous it
should indicate to you as below:
A. Buzz and LED lighting (ln on to 300),
B. Only the LED lighting (Up to 300).
WARNING: It is impossible to test a point where voltage is being
applied.
4.3. DCV TEST
1. Set the function switch to the highest VDC
position.
2. Insert the test leads into COM (Black lead)
and "+" socket (Red lead)
3. Connect the red test lead to the polarity of
the circuit tested and the black one to the
negative. (Fig.02)
4. Read the DCV.A scale converted with the
reference table. Reset the function switch to
successively lower VAC positions to obtain a
higher resolution reading.
Note: The voltmeter is connected in parallel.
(Fig.02)
4.5. DECIBEL
Do this test as the ACV TEST, but read the decibel scale with the
reference table of decibel not the ACV.
4.4. ACV TEST
1. Set the function switch to the highest ACV
position.
2. Insert the test leads into COM (Black lead)
and "+" socket (Red lead)
3. Connect the test leads to the circuit being
tested, regardless of the polarities. (Fig.03)
4. Read ACV scale with the reference table.
Reset the function switch to successively
lower ACV positions to obtain a higher
resolution reading.
4.6. DCA TEST
1. Set the function switch to the highest DCA
position.
2. Insert the test leads into COM (Black lead)
and "+" socket (Red lead)
3. Remove power from the circuit under test,
then open up the circuit at the point where
you wish to measure current. (Fig.04)
4. Read the DCV.A scale converted with the
reference table. Reset the function switch to
successively lower ACV positions to obtain a
higher resolution reading.
4.7. ACV TEST ON OUTPUT TERMINAL
1. Set the function switch to the highest DCV
position.
2. Insert the test leads into COM (Black lead)
and "OUTPUT" socket (Red lead)
3. Connect the test leads to the circuit to be
tested and read the scale in the same
manner as DCV test. Reset the function
switch to successively lower ACV positions to
obtain a higher resolution reading.(Fig.05)
Note: 1. The voltmeter is connected in parallel. 2.
Such a measurement is made to block the DC
voltage which 1 presents in the same circuit and
must be cut so that AC voltage can be read alone. 9
WARNING: Disconnect the test leads from any source of voltage
before removing the back cover or the battery/fuse door. Do not operate
your meter until the rear housing is in place and fastened
securely.
10
4.8. Iceo (LEAKAGE CURRENT) TEST
1. Insert the test leads into COM (Black lead) and "+" socket (Red lead).
2. Set the function switch to X10 (15mA) for small size transistor, or to X1
(150mA) for big size transistor.
3. Short the test leads and turn on adjusting knob to set the pointer to
the zero position.
4. Making Measurement:
A. For NPN transistor, the "N" terminal of the tester is connected to the
COLLECTOR (C) of the transistor, the "P" terminal is connected to the
EMITTER (E) of the transistor.
B. For PNP transistor, reverse the connection of NPN transistor connect.
5. For the lceo range, if the pointer is not within the LEAK zone or the
pointer moves up near to the full scale, it means that the transistor is
not good. Otherwise, it is a good transistor.
4.9. hFE (DC AMPLIFICATION) TEST
1. Insert the test leads into COM (Black lead) and "+" socket (Red lead).
2. Set the function switch to X10.
3. Short the test leads and turn on 0Ω adjusting knob to set the pointer to
zero position.
4. Making Measurement:
A. For NPN FE transistor.
ii. Plug the hFE connector into "N" terminal and connect its red clip
to the collector and the black one to the base of the transistor.
B. For the PNP transistor,
i. Connect the "N" terminal of the tester to the emitter of the
transistor.
ii. Plug the hFE connector into the "P" terminal and connect the clips
in the same way as NPN transistor connection.
5. Read the hFE scale. The value of the reading is lc/lb, which is the DC
amplication degree of the transistor.
5. BATTERY REPLACEMENT
1. Take out the plastic protection cover first
2. Remove Philips head screw and lift off the rear housing of the meter.
3. Replace old battery with fresh 9V and AA type battery.
4. Replace the rear cover and secure the screw.
Indice
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