INSTRUCTION MANUAL
DIGITAL MULTI METER
2230A/2230B
We thank you very much for your purchasing our
POCKET PERSONAL DIGITAL MULTIETER, This
model is a most Reliable, high-precision instrument,
designed by our excellent technology.
Before you use your new instrument, please read this
Operators Manual completely and familiarize yourself
Thoroughly with all functions and connections, With
proper use and care your Digital Multimeter will give you
years of satisfactory service.
SAFETY RULES
● Always check to make sure that the function switch
is set to the proper position.
● When making measurements, CAUTION as
dangerous voltages may be present in normally
safe areas.
● Always disconnect the circuit under test prior to
attaching test leads, as voltages may be present in
capacitors even when the main power is
disconnected
● To avoid electrical shock,use CAUTION when
working above 60V DC or 25V AC rms.
● Make sure all power (AC or DC) is disconnected
(OFF) when making resistance (OHMS)
measurement.
● Never make measurement with the battery cover of
battery case OFF.
● Never fail to keep the maximum tolerable input.
● The POCKET PERSONAL DMM is designed for low
voltage applications. The measurement should be
limited to the circuit under 500V (AC/DC)
● NEVER use this meter if it is WET, DAMP or has
con-densation on it or the probes.
● When making measurements MAKE SURE your
hands NEVER touch anything xecrpt the plastic part
of the probes.
SPECIFICATIONS
Measuring method:Dual integration mode
Display:3 -3/4 digital LCD reading of appprox 3260.
Range:Auto ranging
Polarity Automatic no indication for positive
polarity,minus(-) sign for negative polarity.
Overrange indication:“OL” mark indication (Except
AC/DC )
Sampling:2 times/s
Low Battery indication “ ” mark is displayed when the
battery voltage drops below operating voltage
Auto power off :The meter is powered off 15 minute
later after the last operation was made to bring back
display ,please return the function switch to the OFF.
Bar graph display
Operational temperature :0～40℃，80%RH(max)
Storage temperature :-20℃～60℃,70%RH (max)
Power consumption: 6Mw(TYP)
Size:54(W)×108(H)×12(D)mm
Weight:Approx 110g (include batteries and case )
Accessores:Batteris ,LR-44(1.55V) 2
Hard cover case 1
Instrument manual 1
MEASUREMENT RANGES
Note/Accuracy specified for temperature range of
23℃±5℃, 80%RH(max)
function
range
resolution
accuracy
2230A
2230B
DCV
300mV
300mV
0.1 mV
±(1.3% of rdg +2 digits)
3V
3V
1 mV
±(0.7% of rdg +2 digits)
30V
30V
10 mV
±(1.3% of rdg +2 digits)
300V
300V
100 mV
500V
500V
1 mV
ACV
3V
3V
1 mV
±(2.3% of rdg +5 digits)
30V
30V
10 mV
300V
300V
100 mV
500V
500V
1 mV
OHM
300Ω
300Ω
0.1Ω
±(2.0% of rdg +4 digits)
3KΩ
3KΩ
1Ω
±(2.0% of rdg +2 digits)
30KΩ
30KΩ
10Ω
300KΩ
300KΩ
100Ω
3MΩ
3MΩ
1KΩ
±(6.0% of rdg +2 digits)
30MΩ
30MΩ
10KΩ
±(10.0% of rdg +5 digits)
300Ω
300Ω
0.1Ω
0~2.000V
0~2.000V
1 mV
±(10.0% of rdg +2 digits)
DCmA
30mA
※
10μA
±(2.0% of rdg +2 digits)
300mA
※
100μA
ACmA
30mA
※
10μA
±(2.5% of rdg +5digits)
300mA
※
100μA
DECSRIPTION OF PANEL
Function switch
Switch for changing the measurement function (Ω / )
for resistance,countinuity check.
(VOLT)for voltage measurement
( mA)for current measurement
(OFF) for power OFF
Display
3-3/4 digit lipuid cystal display from O to approx.3260
count with decimal point,annunciators display
Test leads
Red test lead for plus (+)poiarity,Black test lead for
minus(-) polarity.
PREPARATION AND CAUTION BEFORE
MEASUREMENT
● Before making measurements install the batteries
TWO LR-44 batteries can be used.
● Avoid using the POCKET PERSONAL D.M.M. in
places subject to high temperatures,humidity or
excessive vibration.
● Avoid using the POCKET PERSONAL D.M.M. in
places with rapid temperatures varations
● If the POCKET PERSONAL D.M.M.Is used near
noise generating equipment,be aware that the
display may become unstable or indicate large
errors.
● If the function must be switch during a
measurement always remove the test leads form
the circuit being measured .After measurement, set
the function switch to “OFF”.
MEASURING METHOD
DC and AC Voltage Measurement
(1) Set the function switch to “ V”.
(2) Connect the test lead to the circuit to be measured,
the range will change automatically to the level that will
display the input voltage with the best resolution.
(3) Press “SELECT” key to choose “DC” or “AC”
measurement.
(4) The value indicated in the display window is the
measured value of voltage with proper decimal point
and annunciator indication.
DC and AC Current Measurement(only2230A)
1) Set the selector switch to desired “ mA” position.
2) Connect the test lead to the circuit to be measured,
the range will change automatically to the level that will
display the input Current with the best resolution.
3) Press “SELECT” key to choose “DC” or “AC”
measurement.
4) The value indicated in the display window is the
measured value of Current with proper decimal point
and annunciator indication.
MEASUREMENT OF RESISTANCE(Ω)
(1) Set the function switch to “Ω”.
(2) Make sure all power is OFF in the circuit to be
measured.
(3) Connect the test leads to the circuit to be measured,
the range will change automatically, and will Hold on the
range that will display the measures resistance with the
best resolution.
(4)The value in indicatedc in the daisplay is the
measured value of resistance with proper decimal point
and annunciator indication.
Diode Measurement and audible continuity test
(1)Set the function switch to “ / ”.
(2)Connect the test leads to the circuit to be measured .
Press “SELECT” key to choose “ ” or “ ”
measurement.
(3)Connect the test leads across the diode under
measurement, display shows the approx. forward
voltage of this diode.
(4) Connect the test leads to two point of circuit, if the
resistance is lower than approx. 20Ω, the buzzer
sounds.
REPLACEMENT OF BATTERY
(1) When the batteries becomes exhaused or drops
below the operating voltage voltage the “ ” mark is
displayed.
(2) Turn the function switch “OFF” and remove the test
leads from all test circuit,prior to installing fresh
batteries.
(3) Remove the batteries by using the tip of RED test
probe.
(4) Insert the two LR-44 or SR-44 into the battery case
making sure that proper polarity is observed.
Caution
Never using the BLACK test probe to avoid the
short-circuit
MAINTENANCE
When making requests for repair services,Please bring
the instrument directly to the dealer,if this is impossible,
however,send the instrument directly to our sales office.
When mailing this instrument,always pack together with
name ,address,telephone unmber and the warranty
documentation.
● To ensure speedy and reliable repair.always include
information as to the type of faliure and cause.
● If required,always return accessories with the
instrument.
● When contacting us,provide the medel number of
your instrument.
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