6. Common ground
7. Terminal for
V oltage,resistance, and frequency testing
4-2
4-2
4-2
. DCV
DCV
DCV
measurement
measurement
measurement
4-2-1 . Apply the black test leads to “ COM ” terminal and the red one to “ V/ Ω /Hz ”
terminal.
4-2-2 . Switch the knob to a p roper DCV r ange, t hen, connect the test leads
cross the m easured circuit, t he voltage and polarity of the point which connected
with the red test lead will be displayed.
NOTE
NOTE
NOTE
:::
1 . If the voltage under measured is unclear beforehand, should set the range knob to the
highest range, then, switch to a p roper range according to the displaying value..If LC D
displays
“ 1”,
it m eans overrang e, the range knob must be switched to a hig her rang e.
2 . D o not input a v oltage over 1000V
,
or the meter might be damaged.
3 . B e careful when measuring high voltage circuit.
4-3
4-3
4-3
. ACV
ACV
ACV
measurement
measurement
measurement
4-3-1 . Apply the black test leads to “ COM ” terminal and the red one to “ V/ Ω /Hz ”
terminal.
4-3-2.Set the range k nob to a prop er ACV rang e, t hen, connect the test leads
cross to the measured circuit.
NOTE:
NOTE:
NOTE:
1 . If the range under measured is unclear b eforehand, should set the range knob to the
highest range, then, switch to a proper range according to displaying value. . If LCD
displays “ 1 ”,it m eans overrang e, should set the range knob to a higher range.
2. The remained digits do not affect on measuring accuracy.
3. D o not input a voltage over 1000V rms,or,
the me ter might be damaged.
4 . B e careful when measuring high voltage circuit.
4-4
4-4
4-4
. DCDCDC
current
current
current
measurement
measurement
measurement
4-4-1.Apply the black test leads to “ COM”terminal and the red one to “ m A”ter minal
( Max.200 mA
) ,
or the red test lead to “ 20A ” terminal ( m ax. 20A ) .
4-4-2 . Set the range knob to a proper DCA current r ange, then, connect the meter to the
measured c ircuit, the measured current value and the current polarity which the
red test lead connect will be displayed on LCD.
NOTE:
NOTE:
NOTE:
1 . I f the range u nder measured is unknown beforehand, should set the range knob to the
highest range, then, switch to a p roper range according to the displaying value ; If LCD
displays “ 1”, it means overrange, the range knob must be set to a hig her range.
2 . T he m ax. input current is 200 mA o r 20A ( subject to the position where the red test
lead insert
) ,
large current m ay blow the fuse. Be careful especially at 20A range,
because there is no fuse protection at this range, larg e current may heat the circuit,
even dam age the meter.
4-5
4-5
4-5
. ACACAC
current
current
current
measurement
measurement
measurement
4-5-1 . Apply the black test lead to “ COM ” terminal , and the red one to “ m A ” ter m
( max. 200 mA
) ,
or the red teat lead to “ 20A ” terminal ( max. 20A
) ;
4-5-2 . Set the range knob to a proper ACAcurrent range, then, connect the meter to the
circuit under m easured.
NOTE:
NOTE:
NOTE:
1.If the current rang e under measure is unknown beforehand, should set the range knobto
the highest range, then, switch to the proper range according to the displaying value. If
LCD displays “ 1”, it means overrang e, must set the range knob to a higher range.
2.T he max. input current is 200 mA or
20A
( subject to the position where the red test lea d
insert
) ,
large current m ight b low the fuse,be careful e specially at 20A r ange, becaus e
there is no fuse protection at this range, l arge current may heat the ci rcuit, even damage
the m eter.
3. The remained digits do not affect on m easuring accuracy.
4-6
4-6
4-6
. Resistance
Resistance
Resistance
measurement
measurement
measurement
4-6-1 . Apply the black test lead to “ COM ” terminal , and the red one to “ V/ Ω /Hz ”
terminal.
4-6-2 . Set the range knob to a proper resistance r ange, connect the test leads across the
resistance under measured.
NOTE:
NOTE:
NOTE:
1.If the resistance value is over the selected rang e value, “ 1”displays, thus, should se t to
a higher rang e. When measuring value is o ver 1M Ω , the reading needs a few seconds
to be stable. It's normal for high resistance measuring.
2 . Whe n input term inal is open-circuit, overload displays.
3 . B efore measuring in-line r esistance, be sure that power is off and all capacitance are
released.
4 . D o not input voltage at this range.
4-7
4-7
4-7
. Capacitance
Capacitance
Capacitance
measurement
measurement
measurement
Set the knob to proper capacitance r ange, and insert the capacitor u nder tested.
NOTE:
1 . If the capacitance is unknown b eforehand, should set the range knob to the highest
range,then, switch to a proper range according to the displaying v alue.If“ 1”displa ys,
it m eans overrang e, should set to a higher range.
2 . B efore taking m easurement, L CD displaying might not be zero, the rem aining will
become smaller and smaller, it can be ig nored. .
3. If creeps seriously or the capacitor is breakdown when measuring large c apacitance,
some dig its are displayed and unstable.
4. Before measuring, should release the capacitor completely to avoid damage.
5. unit: 1 uF =10 00 nF 1nF=10 00 pF
4-8.
4-8.
4-8.
Transistor
Transistor
Transistor
hFE
hFE
hFE
4-8-1. Set the range to “ hFE ” rang e.
4-8-2. Select NPN or P NP,insert separately emitter,base and collector to pro per
terminal.
4-9
4-9
4-9
. Diode
Diode
Diode
and
and
and
continuity
continuity
continuity
test
test
test
4-9-1 . Apply the black test lead to “ COM ” terminal , and the red one to “ V/ Ω /Hz ”
terminal ( the pol arity of the red test lead is “ +”) .
4-9-2 . Set the range knob to “
”
, connect the test leads to the diode under measured ,
and the reading is close to the value of di ode forward voltage drop.
4-9-3 . Connect the test leads to two points of circuit under measured, if the built-in buzze r
sounds, the resistance between two points is less than approx. (70 ± 20) Ω .
NOTE:
NOTE:
NOTE:
Do not input voltage at “ ” range to avoid dam age the meter.
4-10
4-10
4-10
. Frequen cy
Frequency
Frequency
measurement
measurement
measurement
4-10-1 . Apply the test leads or shield cable to “ COM ” and “ V/ Ω /Hz ” term inal.
4-10-2 . Switch the range knob to frequency range, connect the test leads across to the
signal source or the measured load.
NOTE:
NOTE:
NOTE:
1 . Whe n input is over 1 0V rms , re ading is possible but maybe overrange.
2 . I t's better to use shielding cable on noisy condition when measuring sm all signal.
3 . B e careful when measuring high volt circuit.
4 . Do not input a voltage over 250V DC or AC peak factor to avoid to damag e the meter.
4-11
4-11
4-11
. Conductance
Conductance
Conductance
measurement
measurement
measurement
4-11-1 . Apply the black test leads to “ COM ” terminal, and the red one to “ mA ”
terminal.
4-11-2.Set the range k nobto“ nS”range, connect the test leads to the insulating resistan ce
under measured.
4-12
4-12
4-12
. DAT A
DATA
DATA
HOLD
HOLD
HOLD
PRESS “ HOLD ” key , the current data will be hold on LCD.
4-13.
4-13.
4-13.
Auto
Auto
Auto
Power
Power
Power
Off
Off
Off
After work ing (20 ± 10) minutes, the meter will be auto power off and to be sleeping
mode. Press POWER key twice to restart the power.
4-14.
4-14.
4-14.
BACKLIGHT
BACKLIGHT
BACKLIGHT
Press B/L key to turn on the backlight, and press it ag ain to turn off.
NOTE: When turning on backlight, the working current will be enlarged, it leads to
shorten battery usage and enlarge accuracy of some functions.
555
. Maintenance
Maintenance
Maintenance
Do not try to m odify the electric circuit.
5-1 . Keep the m eter away from water, dust and shock.
5-2 . Do not store and operate the meter under the condition of hig h temperature, high
humidity, combustible, explosive and strong magnetic place.
5-3 . W ipe the case with a damp cloth and detergent, do not use abrasives and alcohol.
5-4 . I f do not operate for a long time, should take out the battery to avoid leakage
5-5 . Change fuse
When replacing fu se, to use the same type and specification
6.6.6.
IfIfIf
the
the
the
meter
meter
meter
does
does
does
not
not
not
work
work
work
properly,
properly,
properly,
check
check
check
the
the
the
meter
meter
meter
asasas
following:
following:
following:
MB-9807-62