CONTENTS
1. SAFETY INFORMATION
……………………………
.1
2. DESCRIPTION
……………………
..
…………………
3
3. OPERATING INSTRUCTION
………………………
..6
3.1 MEASURING VOLTAGE
………………………
.6
3.2 MEASURING CURRENT ……………………… 6
3.3 MEASURING RESISTANCE ………………… ..7
3.4 MEASURING FREQUENCY
……………………
7
3.5 MEASURING CAPACITANCE
…………………
8
3.6 CONTINUITY TEST
…
..
………………………
...8
3.7 DOIDE TEST
……………………………………
..8
3.9 TRANSISTOR TEST
……………………………
.9
4. SPECIFICATIONS …………………………………… .9
5. ACCESSORIES ……………………………………… 13
6. BATTERY & FUSE REPLACEMENT ……………… 14
1. SAFETY INFORMATION
This multimeter has been designed according to
IEC-1010 concerning electronic measuring instruments with an overvoltage category ( CAT Ⅱ ) and pollution 2.
Follow all safety and operating instructions to ensure that the meter is used safely and is kept in good operating condition.
1.1 PRELIMINARY
※ When using this meter, the user must observe all normal safety rules concerning:
— Protection against the dangers of electrical current.
— Protection of the meter against misuse.
※ Full compliance with safety standards can be guaranteed only if used with test leads supplied. If necessary, they must be replaced with the same model or same electronic ratings. Measuring leads must be in good condition.
1.2 DURING USE
※ Never exceed the protection limit values indicated in specifications for each range of measurement.
※ When the meter is linked to measurement circuit, do not touch unused terminals.
※ When the value scale to be measured is unknown beforehand, set the range selector at the highest position.
※ Before rotating the range selector to change functions, disconnect test leads from the circuit under
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test.
※ When carrying out measurements on TV or switching power circuits, always remember that there may be high amplitude voltages pulses at test points which can damage the meter.
※ Never perform resistance measurements on live circuits.
※ Always be careful when working with voltages above 60V dc or 30V ac rms. Keep fingers behind the probe barriers while measuring.
1.3 SYMBOLS
Important safety information, refer to the operating manual.
Dangerous voltage may be present.
Earth ground
Double insulation (Protection class Ⅱ )
1.4 MAINTENANCE
※ Before opening the meter, always disconnect test leads from all sources of electric current.
※ For continue protection against fire, replace fuse only with the specified voltage and current ratings: F1:
2A/250V F2: 10A/250V
※ If any faults or abnormalities are observed, the meter can not be used any more and it has to be
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checked out.
※ Never use the meter unless the back cover is in place and fastened fully.
※ To clean the meter, use a damp cloth and mild detergent only, do not use abrasives or solvents on it.
2. DESCRIPTION
This meter is an autoranging professional instrument with 3 3/4 digit LCD display, capable of performing functions:
- DC voltage measurement
- AC voltage measurement
- DC current measurement
- AC current measurement
- Resistance measurement
- Capacitance measurement
- Frequency measurement
- Diode test
- Transistor test
- Audible continuity test
Names of components
1-4. buttons
5. Rotary switch
6. A input jack
7. mA input jack
8. V/ Ω /Hz input jack
9. COM input jack
10. Transistor input jack
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2.1 SELECT (Function selection button)
This button is used to select ACA or DCA measuring mode.
2.2 RANGE (Auto/manual range selection button)
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This key is the auto/manual key. Power on default is auto measurement, and press one time to switch to the manual measurement. In manual measurement mode, the system will jump up one mode for each press until the highest mode, then return to the lowest mode as a loop. If press the key over 2 seconds, the system will switch back to auto measurement status. Frequency and capacitance measurement cannot use manual measurement. Fox example, at voltage range the changes are as the figure.
2.3 REL (Relative value measurement)
The button is for relative value measurement except Hz, diode and continuity.
Push the button to get relative measurement mode,
“
REL
”
annunciate display on LCD. But store the displayed reading as a reference value.
In the Relative mode, the value shown on the LCD is always the difference between the stored reference value and the present reading. If the new reading is the same as the reference value, the display will be zero.
2.4 DATA HOLD
When this button is pushed, the display will keep the last reading and “ ” symbol will appear on the LCD.
Pushing it again returns the meter to normal mode.
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2.5 INPUT JACKS
The unit has four input jacks that are protect against overload to the limits. During use, connect the black test lead to the COM jack and the red test lead as shown below:
Function
V
Ω
μ
A/mA
Red lead connection
V/
Ω
/Hz
V/
Ω
/Hz
V/
Ω
/Hz
V/
Ω
/Hz mA
Input limits
1000V dc or 750V rms ac
250V dc or rms ac
250V dc or rms ac
250V dc or rms ac
500mA dc or rms ac
A A 10A dc or rms ac
μ
A/mA and A ranges are protected by fuses.
3. OPERATING INSTRUCTION
3.1 MEASURING VOLTAGE
1. Connect the black test lead to the COM jack and the red test lead to the V/
Ω
jack.
2. Set the rotary switch at the desired V or V ~ range position and connect test leads across the source or load under measurement.
3. Read LCD display. The polarity of the red connection will be indicated when making a dc voltage measurement.
3.2 MEASURING CURRENT
1. Connect the black test lead to the COM jack and the read test lead to the mA jack for a maximum of 500mA.
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For a maximum of 10A, move the red lead to the A jack.
2. Set the function switch at μ A, mA or A range to be used and push
“
SELECT
”
button to select DCA or ACA measuring mode.
3. Connect test leads in series with the load under measurement.
4. Read LCD display. The polarity of the red lead connection will be indicated when making a DC measurement.
3.3 MEASURING RESISTANCE
1. Connect the black test lead to the COM jack and the red test lead to the V/
Ω
/Hz jack. (NOTE: The polarity of red lead connection is positive
“ ＋ ”
)
2. Set the rotary switch at
Ω
position and connect test leads across the resistance under measurement. Read
LCD display.
NOTE:
1. For resistance above 1M
Ω
, the meter may take a few seconds to stabilize reading.
2. When the input is not connected, i.e. at open circuit, the figure
“
OL
”
will be displayed for the overrange condition.
3. When checking in - circuit resistance, be sure the circuit under test has all power removed and all capacitors are full discharged.
3.4 MEASURING FREQUENCY
1. Connect the black test leads to the COM jack and the
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red test lead to the V /
Ω
/Hz jack.
2. Set the rotary switch at Hz position and connect test leads across the source or load under measurement.
3.5 MEASURING CAPACITANCE
1. Set the rotary switch at desired position.
2. Before inserting capacitor under measurement into capacitance testing socket, be sure that the capacitor has been discharged fully.
3. When measuring capacitors with shorter leads, a testing adapter is provided with the meter. Insert the adapter into the capacitance testing socket on the front panel to continue measurements.
WARNING!
To avoid shock, be sure the capacitor measuring adapter has been removed before changing to another function measurement.
3.6 CONTINUITY TEST
1. Connect the black test lead to the COM jack and the red test lead to the V/
Ω
/Hz jack (Note: the polarity of red lead connection is positive
“
+
”
).
2. Set the rotary switch at position and connect test leads across two points of the circuit under testing. If continuity exists ( i.e. resistance less than about 50
Ω
), built — in buzzer will sound.
3.7 DIODE TEST
1. Connect the black test lead to the COM jack and the
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red test lead to the V/
Ω
/Hz jack. ( NOTE: The polarity of red lead connection is positive “ + ” )
2. Set the rotary switch at position and connect the red lead to the anode, the black lead to the cathode of the diode under testing. The meter will show the approx.
Forward voltage drop of the diode.
3.8 TRANSISTOR TEST
1. Set the rotary switch at hFE position.
2. Identify whether the transistor is NPN or PNP type and locate Emitter, Base and Collector lead. Insert leads of the transistor to be tested into proper holes of the testing socket on the front panel.
3. LCD display will show the approximate hFE value at the test condition of base current 10
µ
A and Vce 3.2V.
4. SPECIFICATIONS
Accuracy is specified for a period of one year after calibration and at 18 ° C to 28 ° C (64 ° F to 82 ° F) with relative humidity to 80%.
Accuracy specifications are given as:
±
% of reading
±
number of least significant digits.
4.1 GENERAL
MAXIMUM VOLTAGE BETWEEN TERMINALS AND
EARTH GROUND: 1000V DC or 700 rms AC (sine)
FUSE PROTECTION:
µ
A, mA: F 500mA/250V
A: F 10A/250V
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POWER SUPPLY: 9V battery, NEDA 1604 or 6F22
DISPLAY: LCD, 3999 counts MAX, updates 2-3/sec
MEASURING METHOD:
Dual - slope integration A/D converter
OVERRANGE INDICATION:
“ OL ” figure only on the display
POLARITY INDICATION:
“ — ”
displayed for negative polarity
LOW BATTERY INDICATION: “ ” displayed
OPERATING TEMPERATURE:
0
°
C to 40
°
C (32
°
F to 104
°
F)
STORAGE TEMPERATURE:
-10
°
C to 50
°
C (14
°
F to 122
°
F)
DIMENSION: 91
×
189
×
31.5mm
WEIGHT: 310g (including battery)
4.2 AC VOLTAGE
Range Resolution Accuracy
400mV 0.1mV --
4V
40V
1mV
10mV
±
0.5
%
of rdg
±
0.2% of full scale
±
2 digit
400V 100mV
750V 1V
Input Impedance: 10M
Ω
.
±
0.8
%
of rdg
±
2 digits
Frequency Range: 40Hz to 400Hz
Response: Average, calibrated in rms of sine wave
4.3 DC VOLTAGE
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Range Resolution Accuracy
400mV
4V
40V
0.1mV
1mV
10mV
±
0.8
%
of rdg
±
2 digit
±
0.5
%
of rdg
±
2 digit
±
0.5
%
of rdg
±
2 digit
400V
1000V
100mV
1V
±
0.5
%
of rdg
±
2 digit
±
0.8
%
of rdg
±
2 digits
Input impedance: 10M
Ω
, more than 100M
Ω
at 400mV range.
4.4 DC CURRENT
Range Resolution Accuracy
400
µ
A
4mA
40mA
400mA
0.1
1
µ
10
µ
A
µ
A
A
0.1mA
±
0.8
%
of rdg
±
2 digits
±
0.8
%
of rdg
±
2 digits
±
0.8
%
of rdg
±
2 digits
±
1.2
%
of rdg
±
2 digits
10A 10mA
±
2.0
%
of rdg
±
5 digits
Overload protection: F 500mA fuse for
µ
A and mA ranges, F 10 A fuse for A range.
4.5 AC CURRENT
Range Resolution
400
µ
A
4mA
40mA
400mA
10A
0.1
µ
A
1
µ
A
10
µ
A
0.1mA
10mA
Accuracy
±
(0.8~8.0)
%
of rdg
±
3 digits
±
0.8
%
of rdg
±
3 digits
±
0.8
%
of rdg
±
3 digits
±
1.2
%
of rdg
±
3 digits
±
2.0
%
of rdg
±
5 digits
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Overload protection: F 500mA fuse for
µ
A and mA ranges, F 10 A fuse for A range.
Frequency Range: 40Hz to 400Hz
Response: Average, calibrated in rms of sine wave
4.6 RESISTANCE
Range
400 Ω
4K
Ω
40K Ω
400K Ω
2M Ω
40M
Ω
Resolution
0. 1 Ω
1
Ω
10 Ω
100 Ω
1K Ω
10K
Ω
Max. open circuit voltage: 3.2V
Accuracy
±
0.8
%
of rdg
±
3 digits
±
0.8
%
of rdg
±
1 digits
±
0.8
%
of rdg
±
1 digits
±
0.8
%
of rdg
±
1 digits
±
0.8
%
of rdg
±
1 digits
±
1.2
%
of rdg
±
2 digits
4.7 CAPACITANCE
Range Resolution Accuracy
4nF
40nF
1pF
10pF
400nF
4
µ
F
40
µ
F
200
µ
F
4.8 FREQUENCY
Range
100pF
1nF
10nF
100nF
Resolution
100kHz 1Hz
±
3.0
% ±
20
Accuracy
±
2
% ±
5
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4.9 DIODE
Function Resolution
1mV
4.10 AUDIBLE CONTINUITY
Test current
25
µ
A
Open circuit voltage
3.0V
Function Description
If resistance is lower than 50
Ω
, built-in buzzer will sound.
4.11 TRANSISTOR
Vce
3.0V
Function Range h
FE
1 to 1000
5. ACCESSORIES
Base current
25
µ
A
5.1 SUPPLIED WITH THE MULTIMETER
Test leads Electric Rating 1500V, 10A 1 couple
Battery 9V NEDA 1604 or 6F22 1 pcs
Operating Manual 1 pcs
Holster 1 pcs
Capacitance Testing Adapter 1 pcs
5.2 HOW TO USE THE HOLSTER
The holster is used to protest the meter and to make the measurement more comfortable, it comes with tow stands installed together. The figure shows how to use the holster to:
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A: Support the meter with a standard angle.
B: Support the meter with a small angle using the little stand
C: Hang the meter on the wall using the little stand.
Take the little stand off from the back side of the large and insert it into holes located upper on the holster.
D. hold test leads
6. BATTERY & FUSE REPLACEMENT
If the sign “ ” appears on the LCD display, it indicates that battery should be replaced.
Remove screws on the back cover and open the case.
Replace the exhausted battery with a new one.
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Fuse rarely need replacement and blow almost always as a result of the operator ’ s error. Open the case as mentioned above, and then take the PCB out from the front cover. Replace the blown fuse with same ratings.
WARNING
Before attempting to open the case, be sure that test leads have been disconnected from measurement circuits to avoid electric shock hazard.
For protection against fire, replace fuse only with specified ratings:
F1: 200mA/250V (quick acting)
F2: F20A/250V
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