【1】 SAFETY PRECAUTIONS: Before use, read the following safety precautions

This instruction manual explains how to use your multimeter PM3
safely. Before use, please read this manual thoroughly. After reading it,
keep it together with the product for reference to it when necessary.
The instruction given under the heading “
WARNING”“
CAUTION”must be followed to prevent accidental burn orelectrical shock.
1-1 Explanation of Warning Symbols
The meaning of the symbols used in this manual and attached tothe product is as follows.
：Very important instruction for safe use.
・The warning messages are intended to prevent accidents tooperating personnel such as burn and electrical shock.
・The caution messages are intended to prevent damage to the instrument.
DCV：DC voltage ACV～：AC voltage Ω：Resistance：Buzzer：Diode：Capacitance
Hz：Frequency DUTY：Duty cycle：Ground＋：Plus－：Minus：Double insulation

PM3

1-2 Warning Instruction for safe use
To ensure that the meter is used safely, be sure to observe theinstruction when using the instrument.
1. Never use meter on the electric circuit that exceed 3.6 kVA.
2. Pay special attention when measuring the voltage AC 33 Vrms
(46.7 V peak) or DC 70 V or more to avoid injury.
3. Never apply an input signal exceeding the maximum rating input value.
4. Never use meter for measuring the line connected with equipment(i.e. motors) that generates induced or surge voltage since it may
exceed the maximum allowable voltage.
5. Never use meter if the meter or test leads are damaged or broken.
6. Never use uncased meter.
7. Always keep your fingers behind the finger guards on the probe
when making measurements.
8. Be sure to disconnect the test pins from the circuit when changing the function.
9. Never use meter with wet hands or in a damp environment.

INSTRUCTION MANUALSANWA ELECTRIC
INSTRUMENT CO.,LTD.

Dempa Bldg., 4-4 Sotokanda 2-Chome
Chiyoda-ku, Tokyo, Japanー1ー4) Relative measurement switch (RELATIVE)
Suppose that actual value is X1 when REL switch is pressed. Then,value of X-X1 is displayed for actual input value X after that. Each timepressing REL switch, value of X1 is updated. This function is except
the Hz/DUTY measurement mode.
＜In the case of use at the DCV and ACV function＞
・In the case of canceled, please push the switch again.
・The measurement range is fixed to the range in the point that pushed
the switch. About measurement after this, the range is fixed. To
return to the auto range, please stop measurement once and set thefunction again.
・Do not measure any signal that exceeds the maximum of current range.
＜In the case of use
function＞
・When“O.L”is displayed, setting and cancellation are not possible.
・In the case of canceled, please push the switch again.
・The resistance measurement range is fixed to the range in the pointthat pushed the switch. About measurement after this, the range isfixed. To return to thmnge, please stop measurement once andset the function again.
＜In the case of use
function＞
・In the case of canceled, please push the switch again.
・The Capacitance measurement is auto range mode only. After canceled
relative mode, it is possible measurement with the auto range.
5) Hz/DUTY (Frequency/Duty)switch
This switch uses it for the switching of Hz/DUTY. In the case of themode change as Hz→DUTY→voltage measuring mode→Hz.
● When it returns it to the voltage function after the Hz/DUTY
measurement the range is fixed automatically. (DCV function is
400 mV. ACV function is 4 V.) Please stop measurement once tocancel the manual range. And please do measurement after thefunction is set up again.
6) Auto power off
The power of the meter will automatically turned off after the beep if no operation
is done for about 15 minutes. To reset the meter, press any button of the
RELATIVE, DATA HOLD, or Hz/DUTY. To cancel this function, press the SELECT
switch, or change the function switch from the OFF to a desired function while
holding the SELECT switch pressed, and then release the SELECT switch after acouple of minutes. Set the function switch to OFF when meter is not in use.
ー4ー

5-3 Resistance Measurement (Ω)

WARNING

Never apply voltage to the input terminal.

CAUTION

The reading may vary because of external inductance whenmeasuring high resistance value.
1) Application: Resistance of resistors and circuits are measured.
2) Measuring ranges:400 Ω～ 40 MΩ(6 range)
3) Measurement procedure
Resistor① Set the function switch atΩ/ / / function.
② Apply the black red test
pin to measured circuit.
③ Read the value on thedisplay.
④ After measurement, remove
the red and black test pinsfrom the circuit measured.
● If measurement is likely to be influenced by noise, shield theobject to measure with negative potential (test lead black).
● The input terminals release voltage is about 0.4 V.
5-4 Testing Diode ( )WARNING

Never apply voltage to the input terminal.
1) Application: The quality of diodes is tested.
2) Measurement procedure① Set the function switch
at Ω/ / /functionand select the function
by SELECT switch.
② Apply the black test pin to
the cathode of the diode andthe red test pin to the anode.
③ Make sure that the display
shows a diode forward voltage drop.
ー8ー【7】AFTER-SALE SERVICE

Diode

7-1 Warranty and Provision
Sanwa offers comprehensive warranty services to its end-users
and to its product resellers. Under Sanwa's general warranty policy,
each instrument is warranted to be free from defects inworkmanship or material under normal use for the period of one (1)year from the date of purchase.
This warranty policy is valid within the country of purchase only,
and applied only to the product purchased from Sanwa authorized
agent or distributor.
Sanwa reserves the right to inspect all warranty claims to determine
the extent to which the warranty policy shall apply. This warranty
shall not apply to disposables batteries, or any product or parts,
which have been subject to one of the following causes:
1. A failure due to improper handling or use that deviates fromthe instruction manual.
2. A failure due to inadequate repair or modification by people
other than Sanwa service personnel.
3. A failure due to causes not attributable to this product such as
fire, flood and other natural disaster.
4. Non-operation due to a discharged battery.
5. A failure or damage due to transportation, relocation or
dropping after the purchase.
7-2 Repair
Customers are asked to provide the following information whenrequesting services:
1. Customer name, address, and contact information
2. Description of problem
3. Description of product configuration
4. Model Number
5. Product Serial Number
6. Proof of Date-of-Purchase
7. Where you purchased the productPlease contact Sanwa authorized agent / distributor / service
provider, listed in our website, in your country with above
information. An instrument sent to Sanwa / agent / distributor
without those information will be returned to the customer.
Note:1) Prior to requesting repair, please check the following:
Capacity of the built-in battery, polarity of installation anddiscontinuity of the test leads.
ー 12 ーCAUTION
1. Correct measurement may not be performed when using themeter in the ferromagnetic / intense electric field such as places
near a transformer, a high-current circuit, and a radio.
2. The meter may malfunction or correct measurement may not be performed
when measuring special waveform such as that of the inverter circuit.

Factory-preinstalled built-in battery
A battery for monitoring is preinstalled before shipping therefore it may
run down sooner than the battery life specified in the instruction manual.
● The“battery for monitoring”is a battery to inspect the functions
and specifications of the product.

1-3 Maximum Overload Protection Input
Function● This digital multimeter has 4000(5000) counts max. display, however,its range may change even less than 4000(5000) counts dependingon the using function or the measuring range.

【5】MEASUREMENT PROCEDURE
5-1 Start-up Inspection

WARNING

1.Be sure to pre-check the meter
before use.
2.Do not use a damaged meterand test leads.
3.Check continuity of test leads.
4.When a battery exhaust markappears in the display, replace
the battery with a new one.

ACV (Hz/DUTY)
Ω/

/

/

Maximum rating
Input value

Input

Maximum overload
Protection voltage

DC 500 V

DCV (Hz/ DUTY)WARNING

DIGITAL MULTITESTER

10. Never open tester case except when replacing batteries. Do not
attempt any alteration of original specifications.
11. To ensure safety and maintain accuracy, calibrate and check thetester at least once a year.
12.The multimeter restricts in use in indoor.

＋, －AC 500 V

DC 500 V, AC 500 V or
Voltage and current Peak Max.700 V
Input prohibited＊: AC voltage is regulated by rms valus of sinusoidal wave.

【2】APPLICATION AND FEATURES

2-1 Application
This instrument is portable multimeter designated for measurementof weak current circuit.
2-2 Features
・This multimeter is very thin type. Body thickness is 8.5 mm.
・Sharp contrast LCD with character 13.6 mm high is employed,
and unit symbols is displayed on the screen of the LCD.
・Addition function: Hz/Duty , Relative and Data Hold.
・Auto power off(15 min.) It is able to cancel it.
・The instrument has been designed in accordance with thesafety standard IEC 1010-1. (DC/AC 500 V Max. CATII)

5-2 Voltage, Hz/DUTY measurement【3】NAME OF COMPONENT UNITS
Case holder
Display

Test pins

Select switch
Relative switch
Data hold switch
Hz/DUTY selectswitchPower switch andfunction switch

FingerguardsTest probe(Red and Black)

Test leads(TL-PM3)【4】DESCRIPTION OF FUNCTIONSWARNINGIn the case of action or cancel that function as follows, do notturn the function switch in the condition applied input.
1) Power switch and function switch
Turn this switch to turn on and off the power and select the functions of
DCV, ACV,Ω,,,.
2) Select switch
This switch uses it for the switching of Ω/ / / . In the case of themode change as Ω→→→→Ω.
3) Data hold switch
When this switch is pressed, the data display at that time continues(DH lights on the display). When the measuring input changes, thedisplay will not change. When this switch is pressed again, the holdstatus is canceled you can return to the measuring status. (DH on thedisplay disappears.)(DATA HOLD function does not work when measuring frequency.)ー3ー

5-2-2 Hz/DUTY Measurements
Maximum rating input value 60.00 kHz / 99 %WARNING

1. Never apply an input signal exceeding the maximum rating input value.
2. Be sure to disconnect the test pins from the circuit when changing
the function.
3. Always keep your fingers behind the finger guards on the probe
when making measurements.

CAUTION

The setting and measurement (At the time of AC voltage input) of the
Hz/DUTY are possible at the DCV function too. However, we recommend
the use in the ACV function.

5-2-1 Voltage Measurement (DCV,ACV)
Maximum rating input value DC/AC 500 V
1) Applications
DCV: Measures batteries and DC circuits.
ACV ～ : Measures sine-wave AC voltage as lighting voltages.
2) Measurement procedure<DCV>① Set the function switch“DCV”or“ACV”function.
② Apply the black test pin
to the negative potential
side of the circuit to measure
and the red test pin to thepositive potential side.
③ Read the value on the display.
④ After measurement, remove
the red and black test pins fromthe circuit measured.
<ACV>● The display fluctuates when
the test leads are removed. This is not malfunction.
● Since this instrument employs the means value system for its AC
voltage measurement circuit, AC waveform other than sine wave
may cause error.
● In the AC 4 V ranges a figure of about 3～9 conuts will stay on even if
no input signal is present.
● The accuracy guaranteed frequency range is 40 Hz to 400 Hz.

1) Applications: Measures frequency and duty of any circuit.
2) Measurement procedure① Set the function switch
at ACV function. Push the
Hz/DUTY switch one time,and select the Hz function.
(The unit display is Hz display.)In the case of duty measurement,
then push the Hz/DUTY switch
one more time, and selectthe duty function.
(The unit display is % display.)② Apply the red and black test pins to the circuit to measure.
③ Read the value on the display.
④ After measurement, remove the red and black test pins fromthe circuit measured.
● With measuring terminals disconnected, display may overflow
or value may unsteadily fluctuate. There are not malfunctions.
● Input sensitivity varies according to frequency and wave-form.
● Please refer to 8-2 Measurement Range and Accuracy.
● It is only auto range mode.
● When it returns it to the voltage function after the Hz/DUTY
measurement the range is fixed automatically. (DCV function is
400 mV. ACV function is 4 V.) Please stop measurement once tocancel the manual range. And please do measurement after
the function is set up again.
● DATA HOLD function does not work when measuring frequency.
● The meter cannot measure frequency that does not go to and fro
O voltage.

ー5ー

ー6ー

ー7ー

④ Replace the red and black test pins, make sure that thedisplays the same as that when the test leads are released.
⑤ After measurement, release the red and black test pins fromthe object measured.
Judgment: When the items ③ and ④ are normal, the diode is good.
● The input terminals release voltage is about 1.5 V.

2) Measurement procedure
Capacitor① Set the function switch
at Ω/ / /nF function
and select the function
by SELECT switch.
② Press the RELATIVE
switch to make display
show 00.00 nF. (The
“REL”
mark illuminates in the upper
right area of the display.)③ Apply the black red test pin
to capacitor.
④ Read the value on the display.
⑤ After measurement, remove the red and black test pins fromthe circuit measured.
● For measurement of 100 nF or below, the display will not stabilize
due to the influence of ambient noise and floating capacity.
● Necessarily please discharge the electric charge that was
charged to the condenser before measurement.
● As the capacitance increases, the measuring time becomes longer.
(Example: approx. 5 sec. at 10 µ. Approx.45 sec. at 150 µF.)

● Make sure that the test leads are not cut, referring to the section.
6-2 Calibration
The dealer may conduct the calibration and inspection. For more
information, please contact the dealer.
6-3 How to Replace Battery

START
Main unit YES
and test leads
damaged?
NO

To avoid danger of shock hazard,
do not use multimeter withdamage and repair the meter.
Is a battery
Exhaustion mark ison?(*note)

YES

NO
Short the RED and
BLACK test pin

Display shows
000.0～1.0?
Set the function
switch toΩ.

YES

Replace the battery.
Please check again

NO

Stop using it and haveit repaired.

End of pre-check＊note: Non-marking may suggest that a battery be exhausted.

5-5 Checking Continuity ()

WARNING

Never apply voltage to the input terminal.
1) Application: Checking the continuity of wiring and selecting wires.
2) Measurement procedure① Set the function switch
Plugat Ω/ / /functionand select the function
by SELECT switch.
② Apply the red and black
test pins to a circuit orconductor to measure.
③ The continuity can be
Table tap
judged by whether thebuzzer sounds or not.
④ After measurement, release the red and black test pins fromthe object measured.
● The buzzer sounds when the resistance in a circuit to measureis less than about 10 Ω～100 Ω● The input terminals release voltage is about 0.4 V.
5-6 Capacity Measurement ( )WARNING

1. Never apply voltage to the input terminal.
2. This is not suitable for measurement of electrolytic condenser
such as a large leakage condenser.
1) Application: Measures capacitance of capacity.
ー9ー2) Repair during the warranty period:
The failed meter will be repaired in accordance with theconditions stipulated in 7-1 Warranty and Provision.
3) Repair after the warranty period has expired:
In some cases, repair and transportation cost may become
higher than the price of the product. Please contact Sanwa
authorized agent / service provider in advance.
The minimum retention period of service functional parts is 6
years after the discontinuation of manufacture. This retention
period is the repair warranty period. Please note, however, if
such functional parts become unavailable for reasons of
discontinuation of manufacture, etc., the retention period may
become shorter accordingly.
4) Precautions when sending the product to be repaired:
To ensure the safety of the product during transportation,
place the product in a box that is larger than the product 5
times or more in volume and fill cushion materials fully andthen clearly mark “Repair Product Enclosed” on the box
surface. The cost of sending and returning the product shall beborne by the customer.
7-3 SANWA Website
http://www.sanwa-meter.co.jp
E-mail: exp_sales@sanwa-meter.co.jp【6】MAINTENANCE

6-1 Maintenance and inspection
1. Appearance:Is the appearance not damaged by falling?
2. Test leads:Are you having the problem with “the test leads are damaged,
and the cable core and white coating inside of the test leads are exposed”?
(We use double insulation test leads. If you could see the test
leads as above condition, you need to change the new one).
Please do not use as it is, if applicable, of the above items.
Please have it serviced.
ー 10 ー

Safety: EN61010-1, EN61010-2-030, EN61010-2-033, EN61010-031≦DC･AC 500 V: Designed to protection Class II
requirement of IEC 1010-1, Pollution degree II.
EMC : EN61326-1: 2013
RoHS : EN50581
Measurement Category(Overvoltage Category) II:Local Level
Appliance
Portable Equipment
8-2 Measurement Range and Accuracy
Accuracy assurance range：23± 5 ℃ 80 ％RH MAX. No condensation.
FunctionDCVー 13 ー

ACV
～

Ω

CAP.

Range

Accuracy

Input
Resistance

Remarks

400.0 mV ±(0.7 %rdg+3dgt) ≧100 MΩ
Approx.11 MΩ
4.000 V
40.00 V±(1.3 %rdg+3dgt)
Approx.10 MΩ
400.0 V
500 V
Approx.11 MΩ *Accuracy in the
4.000 V±(2.3 %rdg+10dgt)
40.00 Vcase of sine wave.
Approx.10 MΩ *Frequency range:
400.0 V±(2.3 %rdg+5dgt)
500 V
40～400 Hz
400.0 Ω*Open voltage: Approx. 0.4 V
4.000 kΩ*The measuring current changes±(2.0 %rdg+5dgt)
40.00 kΩaccording to the resistance
400.0 kΩmeasure.
4.000 MΩ ±(5.0 %rdg+5dgt)
40.00 MΩ ±(10 %rdg+5dgt)------------------------------------- *Accuracy was measured
5.000 nF
50.00 nF
after canceling display value
500.0 nF ±(5.0 %rdg+10dgt) by relative key.
5.000 μF
50.00 μF±(10 %rdg+15dgt)
200.0 μFー 14 ー＜How to replace the battery＞ Coin type
① Remove the rear caselithium battery
screw with a screwdriver.
CR2032② Remove the rear case.
③ Take out the battery and replace it with a
new one.
④ Attach the rear case and fix it with the screw.
CAUTION
Set a battery with its polarities
Screw
facing in the correct directions.
6-4 Storage

1. This section is very important for safety. Read and understand the following
instruction fully and maintain your instrument properly.
2. The instrument must be calibrated and inspected at least once a year tomaintain the safety and accuracy.

【8】SPECIFICATIONS

8-1 General Specifications
Measuring Method: ΔΣ
Display: 4000 counts max.
Range selection: Auto ranges
Over display:“O.L”
display
Polarity: Automatic selection (only“”is displayed)
Low Battery Indication: －＋Sampling rate: Approx. 3 times/sec.
Accuracy assurance temperature /humidity range:
23±5 ℃ 80 %RH max. No condensation.
Operating temperature/humidity range:
0～40 ℃ 80 %RH max. No condensation.
Storage temperature/humidity range:-10～50 ℃ 70 %RH max. No condensation.
Environmental condition: Operating altitude <2000 m,
Pollution degree2 Indoor use only
Power supply: Coin type lithium battery CR2032 (3 V), 1 pcs.
Power consumption: Approx.6 mW TYP. (at DCV)
Battery life: Approx.150 hours at DCV
Dimension and mass:108(H ) ×56(W )×11.5(D )mm Approx.50 g
Accessories: Instruction manual 1, Case holder 1

WARNINGWARNING

1. If the rear case is removed with input applied to the input terminals,
you may get electrical shock. Before starting the work, always
make sure that no inputs is applied.
2. Be sure to use the fuse is same rating so as to ensure safety andperformance of tester.
3. When operators remove the rear case, do not touch the internal
parts or wire with hand.

CAUTION

1. The panel and the case are not resistant to volatile solvent andmust not be cleaned with thinner or alcohol. For cleaning, use
dry, soft cloth and wipe it lightly.
2. The panel and the case are not resistant to heat. Do not place
the instrument near heat-generating devices (such as a soldering iron)3. Do not store the instrument in a place where it may be subjected
to vibration or from where it may fall.
4. For storing the instrument, avoid hot, cold or humid places or places.
Under direct sunlight or where condensation is anticipated.
Following the above instructions, store the instrument in good environment.
ー 11 ー

Function

Hz

Range

Accuracy

9.999 Hz99.99 Hz999.9 Hz ±(0.7 %rdg+5dgt)
9.999 kHz60.00 kHz

Remarks*Accuracy in the case of sinewave.
9.999 Hz~9.999 kHz: 10 Vrms~250 Vrms.

60.00 kHz: 40 Vrms~100 Vrms.

About input sensitivity andfrequency characteristic:(Square wave DUTY 50 % input)
DUTY
0.1~99 % ------------------------------------2.5 V 0 to peak input:≧1 kHz
6 V 0 to peak input:≧ 10 kHz
40 V 0 to peak input:≧ 60 kHz
Buzzer sounds at less than 10~120 Ω
BUZZER
Open voltage: Approx. 0.4 V
Open voltage: Approx 1.5 V
DIODE

Accuracy in the case of sine wave.
● Do not use the tester near places where strong electromagnetic
waves and trance are generated or strong electrical voltages are
generated.
◎Accuracy calculation
For example：Measurement DCmV
Displayed value：100.0 mV
Accuracy：400 mV range････±(0.7 %rdg+3dgt)
Error：±(100[mV]×0.7 %+3[dgt] )= ±1.0[mV]
True value：100.0[mV]±1.0[mV](In a range of 99.0～101.0 mV)＊3[dgt] in the 400 mV range corresponds to 0.3 mV.

Specifications and external appearance of the productdescribed above may be revised for modification without
prior notice.
ー 15 ー