3
1
/
2
DIGITAL MULTIMETER OPERATION MANUAL
1.SPECIFICATIONS
1.1 GENERAL SPECIFICATIONS
Display : 3
1
/
2
digit LCD with a max reading of 1999.
Polarity : Automatic negative polarity indication.
Zero adjustment : Automatic.
Over range indication : Only the MSD “1” displays.
Low battery : The “
” displays.
Safety standards :
EMC/LVD. The meter is up to the standards of
IEC1010 Pollution Degree 2, Over voltage category
Ⅱ
or double insulation
Ⅱ
.
Operating environment : Temperature 32 to 104
℉
(0
℃
to 40
℃
), humidity<85%RH.
Storage environment : Temperature -4 to 140
℉
(-20
℃
to 60
℃
), humidity<95%RH.
Power : Single, standard 9 volt battery. NEDA 1604IEC6F22
Dimension : 140(H)X65(W)X40(D)mm
Weight : Approx. 170g(including 9V battery)
1.2 ELECTRICAL SPECIFICATIONS
Accuracy is
±
(percentage of r number of digit) at 23
±
5
℃
,<75%RH.
DC Voltage
Range Accuracy
Resolution
200mV 100uV
2V 1mV
20V 10mV
200V
±
(0.5%+3d)
100mV
1000V
±
(0.8%+5d)
1V
Impedance
：
10M
Ω
AC Voltage
Range Accuracy
Resolution
20V 10mV
200V
±
(0.8%+5d)
100mV
700V
±
(1.2%+5d)
1V
Impedance : 10M
Ω
Frequency response : 20V/200V range: 40-400Hz
700V range : 40-200Hz
Resistance
Range Accuracy
Resolution
200
Ω
±
(0.8%+5d)
0.1Ω
2k
Ω
1Ω
20k
Ω
10Ω
200k
Ω
100Ω
2M
Ω
±
(0.8%+3d)
1kΩ
20M
Ω
±
(1.2%+8d)
10kΩ
Over Load protection
：
250V DC/AC RMS
DC Current
Range Accuracy
Resolution
20mA
±
(1.2%+3d)
10uA
200mA
±
(1.5%+3d)
100uA
10A
±
(2.0%+5d)
10mA
Over Load protection
：
Fast 0.2A/250V fuse, 10A/250 fuse.
AC Current
Range Accuracy
Resolution
20mA
±
(1.2%+5d)
10uA
200mA
±
(1.5%+5d)
100uA
10A
±
(2.0%+8d)
10mA
Over Load protection
：
Fast 0.2A/250V fuse, 10A/250 fuse
Capacitance
Range Accuracy
Resolution
20nF 10pF
200nF
100pF
20uF
±
(4%+10d)
10nF
Over Load protection
：
36V DC/AC RMS
Diode Test
Range
Description
Test Condition
Read & display approx. forward
voltage of diode
Forward DC Current approx.
1mA. Reversed DC voltage
approx. 3V.
Buzzer sounds if resistance
Between terminals V/
Ωa
nd
COM is less than about 90
Ω.
Open voltage is approx. 3V
Over load Protection: 250V DC/AC RMS
Temperature
Range Accuracy
Resolution
-40
℃
~ 400
℃
±
( 0.75% + 3d)
1
℃
400
℃
~ 1000
℃
±
( 1.5% + 15d)
1
℃
Using F type thermocouple probe
2. FRONT PANEL DESCRIPTION
1.
LCD display
2.
DATA HOLD switch
3.
FUNCTION and RANGE switch
4.
INPUT terminal
3.OPERATION
1.Check the 9-volt battery by setting the ON-OFF switch to ON. If the battery is weak,
a
sign will appear on the display. If this does not appear on the display, proceed as
below. See MAINTENANCE if the battery has to be replaced.
2.The mark, or sign next to the lead jacks, is for warning that the input voltage or
current should not exceed the indicated values.
This is to prevent from damaging to the internal circuits.
3.The function switch should be set to the range that you want to test before operation.
3.1 DC and AC Voltage measurement
1.
Connect the BLACK test lead to “COM” jack and RED test lead the “V/
Ω
” jack.
2.
Set the FUNCTION switch to desired DCV or ACV position and connect the probes
across the source or load under measurement.
Note:
1)
If the voltage ranges is unknown beforehand set the FUNCTION switch to a high
range and work down.
2)
When only the figure "1"is displayed, over range is being indicated and the
FUNCTIN switch must be set to a higher range.
3)
: Do not apply more than DCV1000V/AC700Vrms to the input. Indication is
possible at higher voltages but there is danger of damaging the internal circuitry.
4)
Be careful when measuring high voltage.
3.2 DC and AC Current measurement
1.
Connect the BLACK test lead to “COM” jack and RED test lead to “mA” jack for
measurement up to 200mA.
2.
Set the FUNCTION switch to desired current range position.
3.
Connect the probes in series with the current source to be measured.
4.
For current measurement from 200mA to 10A follow generally the above procedure but
connect the RED test lead to “10A” jack.
Note:
1)
If the current range is unknown beforehand, set the FUNCTION switch to a high
range and work down.
2)
When only the figure "1" is displayed over range is being indicated and the
FUNCTION switch must be set to a higher range.
3)
: The max input current is 200mA,or 10A depending upon the jack used.
Excessive current will blow the fuse so that must be replaced.
The 10A range is not protected by a fuse.
4) The max terminal voltage drop (burden voltage) is 200mV.
3.3 Resistance measurement
1.
Connect the BLACK test lead to “COM” jack and RED test lead the “V/
Ω
” jack.
2.
Set the FUNCTION Switch to desired resistance range position.
3.
Connect the probes across circuit to be tested.
Note:
1)
If the resistance value being measured exceeds the max value of the range selected,
and over range indication will be displayed ("1"). Select a higher range, for resistance
of approx. 1M
Ω
and above, the meter may take a few seconds to stabilize. This is
normal for high resistance readings.
2)
When the input is not connected, i.e. at open circuit, the figure "1" will be displayed
for the over range condition.
3)
When checking in-circuit resistance, be sure the circuit under test has all power
removed and that all capacitor are fully discharged.
4)
Open circuit voltage is approx. 3V.
Max input overload: 250Vrms<10sec.
3.4 Capacitance measurement
1.
Before connection the test capacitor, note the display which may have readings other than
zero each time the range is changed. This offset reading will not affect the accuracy for it
can be overridden by true value.
2.
Connect the test capacitor to the input sockets, noting the polarity connections when
required.
Note:
1)
If the capacitance value being measured exceeds the max value of the range selected,
and over range indication will be displayed ("1"). Select a higher range.
2)
Before insert the capacitor into Cx socket, the LCD display may not be zero, the
