[1] SAFETY PRECAUTIONS Before use, read the following safety precautions.
This instruction manual explains how to safely use your new
PM33a digital multimeter with clamp sensor. Before use, please
read this manual thoroughly. After reading it, keep it together
with the product so you can refer to it when necessary.
Using this product in ways not specified in this manual may
damage its protection function.
Instructions given under the “ WARNING” and “ CAUTION”
headings must be followed to prevent accidental burns orelectrical shock.
1-1 Explanation of Warning Symbols
The meanings of the symbols used in this manual and on the
product are as follows.
Very important instruction for safe use.
The warning messages are intended to prevent accidents
to operating personnel such as burn and electrical shock.
The caution messages are intended to prevent damage tothe instrument.
: Direct current (DC): Ground 〜 : Alternating current (AC): CapacitanceΩ : Resistance Hz : Frequency: Continuity
DUTY : Duty cycle: Double insulation (Protection Class II): Diode: Plus input (Red): Minus input (Black)
1-2 Warning Instruction for Safe Useand the clamp sensor barrier when making measurements.
9. Be sure to disconnect the test pins from the circuit whenchanging the function.
10. Before starting measurement, make sure that the function
a n d r a n g e a re p ro p e r l y s e t i n a c c o rd a n c e w i t h t h emeasurement.
11. Never use meter with wet hands or in a damp environment.
12. Never open the instrument case except when replacing
batteries. Do not attempt any alteration of original specifications.
13. To ensure safety and maintain accuracy, calibrate andcheck the instrument at least once a year.
14. The instrument is for indoor use only.
CAUTION
1. Correct measurement may not be possible in areas
exposed to strong magnetic fields generated by electricalequipment such as a transformer or large current path,electromagnetic waves generated by wireless equipment,or areas where electrostatic charges are generated.
2. This instrument may malfunction or may not be able totake correct measurements with special waveforms suchas those produced by an inverter circuit.
1-3 Overload Protections
Function

WARNING

DCV · ACVTo ensure the meter is used safely, be sure to observe theinstructions when using the instrument.
1. Never use meter on the electric circuits that Exceed 3.6 kVA.
2. Pay special attention when measuring voltages of AC 33
Vrms (46.7 V peak) or DC 70 V or more to avoid injury.
3. The clamp sensor provided with this instrument is
exclusively for low-voltage use. Perform clamp current
measurement with 600 V or less lines.
4. Never apply an input signal exceeding the maximum
rating input value.
5. Never use meter for measuring the line connected withequipment (i.e. motors) that generates induced or surge
voltage since it may exceed the maximum allowable voltage.
6. Never use meter if the meter or test leads are damaged or broken.
7. Never use uncased meter.
8. Always keep your fingers behind the finger guards on the probe

Hz / DUTYΩ//

DCA · ACA

[4] DESCRIPTION OF FUNCTIONSWARNING

When canceling an operation, do not turn the function
switch during measurement.
4-1 Power Switch & Function Switch (All Functions):
Turn this switch to turn the power ON and OFF and to selectthe measurement function.
4-2 SELECT Button (V · Ω/ / · CLAMP A positions):
As this button is pressed, the function switches in the order of
the arrows (g) as shown below.
• V position: AC voltage ( ) g DC voltage ( ) g AC voltage( )• Ω/ / position: Resistance measurement (Ω) g Continuity
check ( ) g Diode test ( ) g Resistance measurement (Ω)• CLAMP A position: AC current ( ) g DC current ( ) g AC
current ( )4-3 RANGE Button (DCV · ACV · Ω · · Functions)
Press this button to engage the manual mode and fix therange (extinguished).
When the manual mode is engaged, each press of this buttonchanges the range. Select an appropriate range while
confirming the unit and the position of the decimal point on
the display. To restore the auto range, keep this button
depressed for more than 1 second (lit).
This button cannot be used when in Hz/DUTY
measurement.
4-4 MAX/MIN Button(DCV · ACV · Ω · · · · DCA · ACA Functions):
Press this button to enter the MAX/MIN mode. As this button
is pressed, the measurement range switches in the order of
the arrows (g) as shown below.
• MAX value indication (lit) g MIN value indication (lit)
g Current measurement value indication (blinking)g
MAX value indication (lit)• MAX value indication:
Displays the maximum value of the values measured since
the engagement of the MAX/MIN mode.
• MIN value indication:
Displays the minimum value of the values measured since theengagement of the MAX/MIN mode.

Clamp
sensorsection

DC/AC 600 V
600 V DC/AC

Voltage and current
input prohibited
DC/AC 100 A
Voltage input
prohibited

100 A DC/ACRANGE
buttonSELECT
button1) Applications
DCV: Vo l t a g e o f t h e b a t t e r y a n d D C c i r c u i t a r emeasured.
ACV: Sine wave AC voltage, such as lighting voltage, ismeasured.
2) Measurement procedure
1 Set the function switch to the “V” position and selecteither DCV or ACV with the SELECT button.
2 Apply the red and black test pins to the circuit tomeasure.
• For measurement of DCV, apply the black test pin to
the negative potential side of the circuit to measure
and the red test pin to the positive potential side.
• For measurement of ACV, apply the red and black
test pins to the circuit to measure.
3 The reading of voltage is shown on the display.
4 After measurement, release the red and black test
pins from the object measured.
④

Battery③④

DCV
measurement

②
④

ACV
measurement

4-9 Low Battery Indication
When the built-in batteries are exhausted and the battery
voltage drops below about 2.3 V, thewill appear in thedisplay. If this icon is lit, replace the batteries with new ones
(two at the same time).

Readings are unstable when test leads are opened.
Accuracy is guaranteed in the case of sine wave.

Capacitor

Diode

⑥

④

When the 6.600 nF or 66.00 nF range is used, use the
REL mode to set the values that remain on thedisplay to “0” (cancelled) before the measurement isperformed.
Readings are unstable because of stray capacitancein test leads or noise.

)

Measurementunits− 13 −[5] MEASUREMENT PROCEDURE[6] MAINTENANCE

5-1 Start-Up Inspection

WARNING
1. Make sure that no low battery indication appear in thedisplay.
2. Never use meter if the meter or test leads are damaged
or broken.
3. Check continuity of test leads.

1. This section is very important for safety. Read andunderstand the following instructions fully and maintainyour instrument properly.
2. The instrument must be calibrated and inspected atleast once a year to maintain its safety and accuracy.

Note: If there is no display, the batteries may be exhausted.

6-1 Maintenance and Inspection
1) Appearance• Has the appearance been damaged by falling?
2) Test leads• Is the test lead cord damaged?
• Is the core wire exposed at any place on the test
leads?
If the built-in fuse is blown, current measurement is
impossible. Make sure that the test leads are not cut,referring to the section 5-1.

START

Main unit
and test leads
damaged?

DamagedCheckNodamaged②

Check continuityof test leads.
①Set the function at“ ”.

1. To avoid electric shock, do not remove the battery
compartment cover when input is applied to themeasurement terminal and clamp sensor or whenmeasurement is being performed.
2. Be sure to confirm that the function switch is set to “OFF”
before replacing the batteries.

①②Short the red andblack test pins.

No

Stop using it andhave it repaired.

Yes

Max. rating input valueΩ

66.0 MΩ

Measurement range
660.0 Ω, 6.600 kΩ, 66.00 kΩ,
660.0 kΩ, 6.600 MΩ, 66.0 MΩ

1) Applications: Measuring the resistance of resistors andcircuits.
2) Measurement procedure
1 Set the function switch to the Ω/ /position.
2 Apply the red and black test pins to an object tomeasure.
3 The reading is shown in the display.
4 After measurement, release the red and black test
pins from the object measured.

⑤③)

WARNING

Never apply voltage to the input terminals.
1) Applications: Checking the continuity of wiring andselecting wires.
2) How to use
1 Set the function switch to the Ω/ / position.
2 Select “ ” by pressing the SELECT button.
3 Apply the red and black test pins to a circuit orconductor wire to measure.
4 The continuity can be judged by whether the buzzer
sounds or not.
5 After measurement, release the red and black test
pins from the object measured.
④
③
⑤

②
①

⑤

Extension cord

The buzzer sounds when the resistance of the circuit
to be measured is less than approx. 30 Ω.
The open circuit voltage between the input terminals
is approx. 0.78 V.

①− 11 −③

CAUTION
1. The panel and the case are not resistant to volatilesolvent and must not be cleaned with thinner or alcohol.
2. The panel and the case are not resistant to heat. Do notplace the instrument near heat-generating devices (suchas a soldering iron).
3. Do not store the instrument, in a place where it may besubjected to vibration or from where it may fall.
4. For storing the instrument, avoid hot, cold or humid
p l a c e s o r p l a c e s u n d e r d i re c t s u n l i g h t o r w h e recondensation is anticipated.
5. When the instrument is not going to be used forextended time, be sure to remove the batteries.

− 17 −④

Resistor①②

the two fixing screws from the battery
compartment cover.
2 Slide the battery compartment cover downward to
remove it.

②
④

①④

1 Remove

If measurement is likely to be influenced by noise,shield the object to measure with negative potential(COM). If a finger touches a test pin during
measurement, measurement will be influenced by
the resistance in the human body, and that results inmeasurement error.
Open circuit voltage: Approx. 0.78 V in 660 Ω range			Approx. 1.2 V in other range
Resistance cannot be measured when voltage ispresent.
5-5 Checking Continuity (WARNING

Function

CAUTION
Set the batteries with their polarities facing in the correct
directions.

− 8 −When the input terminal is not connected, the display
may fluctuate and be unstable. This is not a
malfunction.
The frequency measurement range is 20 Hz ~ 66
kHz. The input sensitivity with sine wave alternating
current is 10 ~ 600 Vrms.
Measurement of an inverter power supply circuit may
cause a malfunction.
Measurement with DC-coupled input is not possible.

compartment with new ones.
4 Place the battery compartment cover and tighten the
fixing screws.
• About the batteries when shipped from the factory
The batteries incorporated when shipped from thefactory are monitor batteries, so their service life may be
shorter than that of brand-new batteries. A monitor
battery is a type of battery used to check the functions ofand performance of the product.

6-4 Storage
WARNING− 12 −[8] SPECIFICATIONS

8-1 General Specifications
Measurement
Display
Over ranging indication
Range selection

Double integral method
Max. 6600 count“OL” mark indication
Auto and manual ranges
Automatic selection (–Polarity selection
display only)
Displayed when built-in
batteries are exhausted (toLow battery indication
2.3 V or less) with
lit orblinking in display
Sampling rate
Approx. 3 times/sec
Current measurement system CT clamp
Max. clamp conductor
10 mm
diameterAC sensoring
Average sensoring
Operating altitude <2000 m,
Environmental conditionindoor use, pollution degree 2
Accuracy-guaranteed
23 ± 5 °C, <80 % RH (without
temperature/humidity range
condensation)
Operating temperature/
5 ~ 40 °C, <80 % RH (without
humidity range
condensation)
Storage temperature/–10 ~ 50 °C, <80 % RH
humidity range(without condensation)
Power supply
Two LR03 alkaline batteries
Power off after approx. 30
Auto power off
minutes since last operation
Power consumption
Approx. 7 mW TYP (at DCV)
130 (L ) x 75 (W ) 19.9 (D ) mm
(excluding protrusions),
Dimensions & mass
approx. 160 g (including
batteries)
Approx. 60 cm for both red
Test lead lengthand black
EN61010-1, EN61010-2-030, EN610102-033, EN61010-2-032 CAT. III 300 V,
Safety standard
CAT. II 600 V, EN61010-031
EMC directive, RoHS directive IEC61326(EMC), EN50581(RoHS)
Accessories
Instruction manual− 21 −

Max. input rating value
DC 100.0 A
AC 100.0 A• ACA: No adjustment is necessary.
Align one line of the conductor to be measured withthe center of the arrows on the clamp sensor.
• DCA: Point the object to be measured in the same
direction as the current direction marking. If it ispointed in the opposite direction, “–” will be
displayed.
• ACA: The current direction of the object to bemeasured is irrelevant.
4 Read the measurement value in the display.
5 After measurement, remove the conductor from theclamp sensor.
3

Clamp Sensor
Centerpositionmarking①

Barrier⑤③④Current direction
marking

1) Applications
DCA: Measures the current consumption of devices
such as an automotive battery.
ACA: Measures the sine wave alternating current with40 ~ 400 Hz frequency of power supply facilities.
2) Measurement procedure
1 Raise the clamp sensor from the rear of the main unit.
2 Set the function switch to the CLAMP A position,and press the SELECT button to select DCA or ACA.
• DCA: Use the ZERO set function to set the display
value to “0.0 A” before measurement.

Current
direction

7-1 Warranty and Provision
Sanwa offers comprehensive warranty services to its end-users andto its product resellers. Under Sanwa’s general warranty policy, each
instrument is warranted to be free from defects in workmanship ormaterial under normal use for the period of one (1) year from thedate of purchase.
This warranty policy is valid within the country of purchase only, andapplied 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 fuses, disposables batteries, or any product orparts, which have been subject to one of the following causes:
1. A failure due to improper handling or use that deviatesfrom the instruction manual.
2. A failure due to inadequate repair or modification bypeople other than Sanwa service personnel.
3. A failure due to causes not attributable to this productsuch 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 withabove information. An instrument sent to Sanwa / agent /distributor without those information will be returned to thecustomer.
Note:1) Prior to requesting repair, please check the following:• Capacity and installation polarity of the built-in
batteries.
• Continuity of the test leads.
− 19 −MEASUREMENT CATEGORY
CAT II: Primary electrical circuits in equipment connected toan AC electrical outlet by a power cord.
CAT III: P r i m a r y e l e c t r i c a l c i rc u i t s o f h e a v y e q u i p m e n tconnected directly to the distribution panel, andfeeders from the distribution panel to outlets.

Capacitance

8-2 Measurement Range and Accuracy
Accuracy assurance range: 23 ± 5 °C & less than 80 % R.H.
No Condensation
Function
DCV
DC Voltage

Range
660.0 mV
6.600 V
66.00 V
600.0 VΩ

Accuracy±(1.1 %rdg+3dgt)±(0.7 %rdg+3dgt)±(0.8 %rdg+3dgt)±(1.1 %rdg+3dgt)

660.0 mV ±(1.6 %rdg+10dgt)
ACV
AC Voltage

6.600 V
66.00 V±(1.4 %rdg+6dgt)
600.0 V

ResistanceΩTesting
Diode
Checking
Continuity

660.0 Ω6.600 kΩ66.00 kΩ660.0 kΩ6.600 MΩ
66.0 MΩ±(1.5 %rdg+7dgt)±(0.9 %rdg+3dgt)±(2.0 %rdg+3dgt)±(4.0 %rdg+3dgt)

Input impedance≥100 MΩ
Approx. 11 MΩ

Remarks

Approx. 10 MΩ
• Accuracyguaranteed≥100 MΩ
range: 40 ~100 HzApprox. 11 MΩ
• Accuracyguaranteed
range: 40 ~400 HzApprox. 10 MΩ
• Accuracy inthe case ofsin wave• Open voltage: Approx. 1.2 V• Open voltage: Approx. 0.78 V• The measuring current
changes according to theresistance of the resistor tomeasure.

• Open voltage: Almost battery voltage• Buzzer sounds at less than 30 Ω
• Open voltage: Approx. 1.2 V

Hz
Frequency

6.600 nF
66.00 nF
660.0 nF±(5.0 %rdg+10dgt)
6.600 μF
66.00 μF
660.0 μF6.600 mF±(7.0 %rdg+10dgt)
66.00 mF
660.0 Hz6.600 kHz±(0.5 %rdg+3dgt)
66.00 kHz

DUTY

20.0 ~
80.0 %±(0.5 %rdg+5dgt)

DCA
DirectCurrent

100.0 A±(2.0 %rdg+5dgt)

ACA
Alternating
Current

100.0 A±(2.0 %rdg+5dgt)

Barrier

When the position of this instrument is changed
during DCA measurement, the display may fluctuate
due to geomagnetism.
Because the AC sensoring system of this instrument
is an average value system, an error in the measured
value will occur with waveforms other than sine
waves.
Ac c u r a c y is g u a r a n t e e d in ACA m e a s u re m e n t
between 40 ~ 400 Hz.
Measurement of an inverter power supply circuit may
cause a malfunction.
− 16 −[7] AFTER-SALE SERVICE− 18 −

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. Pleasecontact Sanwa authorized agent / service provider inadvance. 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 e n s u r e t h e s a f e t y o f t h e p r o d u c t d u r i n gtransportation, place the product in a box that is larger
than the product 5 times or more in volume and fillcushion materials fully and then clearly mark “Repair
Product Enclosed” on the box surface. The cost ofsending and returning the product shall be borne by
the customer.
7-3 SANWA Website
http://www.sanwa-meter.co.jp
E-mail: exp_sales@sanwa-meter.co.jp− 20 −• Accuracy was measured
after canceling display value
by the REL function.

• Measurement range: 20 Hz~ 66 kHz• Accuracy with input voltage
sensitivity of 10 ~ 600 Vrms
sin wave AC• 50/60 Hz rectangular wave,
accuracy at 10 ~ 60 Vpp• Accuracy was measured
after canceling display value
by the ZERO set function.
• Accuracy-guaranteed
range: 40 ~ 400 Hz• Accuracy in the case of sin
wave

rdg: reading dgt: digits
Note: Correct measurement may not be possible in areas
exposed to strong magnetic fields generated byelectrical equipment such as a transformer or large
current path, electromagnetic waves generated bywireless equipment, or areas where electrostatic
charges are generated.
Accuracy calculation
Ex.) Measurement of DC voltage (DCmV)
Display value:
100.0 mV
Range accuracy: 660 mV range … ± (1.1 %rdg±3dgt)
Error:± (100.0 mV x 1.1 %±3dgt) = ±1.4
mV
True value:
100.0 mV ± 1.4 mV (in a range of
98.6 ~ 101.4 mV)
Note: 3dgt in the 660 mV range corresponds to 0.3 mV.
Specifications and external appearance of the productdescribed above may be revised for modified without
prior notice.

− 22 −− 23 −

Conductor to
be measured(electrical wire)②

Measurement range
DC 100.0 A
AC 100.0 A− 15 −

6-2 Calibration
The manufacturer may conduct calibration and inspection.
For more information, please contact your dealer.
6-3 Battery Replacement

CAUTION
1. The measurable diameter of a conductor is 10 mm. Do
not force a cable with an outer diameter of more than 10
mm into the clamp sensor section. Also do not apply
external force to the clamp sensor section.
2. Make sure that the conductor to be measured is alignedwith the center of the arrows on the clamp sensor.
Otherwise, a measurement error will result.
3. Do not let this instrument come near a conductor inwhich large current flows or place it on a strong
magnetic field. Such an environment may cause acurrent value to be displayed even though no
measurement is made (an error may occur). Since theclamp sensor of this instrument is a U-shaped open-type
sensor, it is more susceptible to such an environment
compared than a closed-type sensor.

− 14 −
3 Replace both of the two batteries in the battery

WARNING

1. The clamp sensor of this instrument is exclusively for low
voltage. Perform the clamp current measurement on aline with 600 V or less.
2. Do not turn the function switch during measurement.
3. During measurement, do not hold the clamp sensor atany point beyond the barrier.
4. To prevent electric shock, be sure to store the test probe
and test lead in their designated storage compartments.

Function
DCA
ACA

②

⑤

Never apply voltage to the input terminals.

Numerical indication

WARNING①WARNINGNo problem. Start
measurement.

CAUTION
When high resistance is measured, the displayed value
may fluctuate due to external induction.

− 10 −⑥

5-7 Capacitance Measurement (The buzzer
sounds?

1. Never apply an input signal exceeding the maximum
rating input value.
2. Do not turn the function switch during measurement.
3. Do not hold the test probe by a section closer to the test
pin side behind the finger guard.

⑤

Anode

④

− 4 −

Never apply voltage to the input terminals.

1) Applications: Measuring the frequency and duty of any
circuit.
2) Measurement procedure
1 Set the function switch at the V position and press
the SELECT button to select ACV.
2 Press Hz/DUTY button to select the frequency (Hz)measurement or DUTY ratio measurement.
3 Apply the red and black test pins to a conductor tomeasure.
4 Read the value on the display.
5 After measurement, release the red and black test
pins from the object measured.

1) Applications: Measuring the capacitance of low leakage
condenser such as film condenser.
2) How to use
1 Set the function switch to theposition.
2 Apply the red and black test pins to a conductor tomeasure.
3 Read the value on the display.
4 After measurement, release the red and black test
pins from the object measured.

③

ZERO set

MAX/MIN
mode

66.00 mF

Measurement range
6.600 nF, 66.00 nF, 660.0 nF,
6.600 μF, 66.00 μF, 660.0 μF
6.600 mF, 66.00 mF

Decimal points

5-4 Resistance Measurement (Ω)

Measurement range
660.0 Hz, 6.600 kHz, 66.00 kHz
20.0 % ~ 80.0 % at 50/60 Hz③

Max. input rating value

Function

The open voltage of the input terminals is almost thesame as the battery voltage.

Low battery indication

WARNING④

Continuity
check

− 7 −

5-3 Frequency/DUTY Measurements (Hz / %)1) Applications: Testing the quality of diodes.
2) How to use
1 Set the function switch to the Ω/ /position.
2 Select “ ” by pressing the SELECT button.
3 Apply the black test pins to the cathode of the diodeand the red test pin to the anode.
4 Make sure that the display shows a diode forward
voltage drop.
5 After replacing the red and black test pins, connect
the red test pin to the cathode of the diode andconnect the black test pin to the anode.
6 Make sure display is the same as when the test leadis not connected (OL indication).
Note: Successful completion of steps 4 and 5
indicates that there is no problem with thediode.
7 After measurement, release the red and black test
pins from the object measured.

1. Discharge the capacitance before measurement.
2. This is not suitable for measurement of electrolytic
condenser such as a large leakage condenser.
3. It takes a while to measure large capacitance.

Auto power off

4-8 Auto Power Off (APO):
The power and display will be turned off automatically whenno switch or button operation is made for about 30 minutes
after the power was turned on.
When a button is pressed or the function switch is turned
during measurement, the time until the Auto Power Off will be
extended an additional 30 minutes. To wake up from the Auto
Power Off mode, press the button again. When returned, thevalue at the time of the Auto Power Off will be displayed using
the DATA HOLD mode. To disable this function, turn thefunction switch while pressing any button (except the
SELECT or DATA HOLD button) to turn on the power ( lit).
When the Auto Power Off mode is engaged, theis lit in
the display.
Although power consumption in the Auto Power Off mode
the is less than 1/100 of that of the turned-on status, be sure
to set the power switch to OFF as soon as measurement iscomplete.

The frequencies where accuracy is guaranteed in the
ACV measurement are 40 ~ 100 Hz in the 660 mV
range and 40 ~ 400 Hz in other ranges.
Although the terminals to be measured are shortcircuited in the AC 660 mV and AC 6.6 V ranges, up
to 10 counts may remain in the AC 660 mV range
and up to 7 counts may remain in the AC 6.6 V
range.
Measurement of an inverter power supply circuit may
cause a malfunction.

Never apply voltage to the input terminals.

Cathode5-8 Clamp Current Measurement (CLAMP A)

CAUTIONWARNING②①

Diode test

REL
measurement

Actual input value
Display in REL measurement
DC 6.000 V
DC 3.000 V
DC 3.000 V
DC 0.000 V
DC 1.000 V
DC -2.000 V
When the function or range is switched, the REL
measurement or ZERO set will be canceled.

②OutletNegativepolarityPowerswitch &Function
switch③④

REL/ZERO
button)④⑥

3-2 Display

ACmeasurement

Ex.) Display after the REL/ZERO button is pressed during
DC 3.000 V input

Max. rating input value
66.00 kHz
(600 Vrms or less)Removable test pin covers
When not covered : CAT. Ⅱ 600 V
When covered : CAT. Ⅲ 300 V

Hz/DUTY
button4-7 DATA HOLD Button (All Functions)
When this button is pressed, the will be lit in the display andthe value displayed at that time will be maintained. The
display will stay the same even if the measurement inputchanges. Pressing this button again will cancel the DATAHOLD mode and restore the measurement mode.
When the function or range is switched, the DATA HOLD
mode will be canceled.

Function
Hz/DUTY

Finger guards

DCmeasurement

DATA HOLD
button− 6 −Max. rating input value
Measurement range
DC 600.0 V
660.0 mV, 6.600 V, 66.00 V, 600.0 V
AC 600.0 V
660.0 mV, 6.600 V, 66.00 V, 600.0 V

When notcovered

Test probe (red)Test probe (black)

Auto range mode

• Current measurement value indication:
Holds in memory the maximum and minimum values whiledisplaying the current measurement value. Press this button toconfirm the maximum and minimum values by switching
between the MAX and MIN value indications.
To disengage the MAX/MIN mode, keep this button
depressed for more than 1 second.
When the function or range is switched, the MAX/MIN mode
will be canceled.

4-6 REL/ZERO Button(DCV · ACV · Ω· · · · DCA · ACA Functions):
Press this button to enter the REL measurement mode when
the DCV, ACV, Ω, , , , or ACA function is activated(lit).
The measurement range will be fixed, and the displayed
value will be set to zero using the input value at the time ofpressing the button as the reference value. To cancel the REL
measurement, press this button again.
Pressing this button in the DCA mode sets the displayed
value to ZERO (lit).
The value at the time the button is pressed will be canceled,
and the display will show 0.0 A.
To deactivate the ZERO set function, press the button again
and keep it depressed for more than 1 second.

Battery
compartment
cover

Display

5-6 Testing Diodes (Removable
test pin covers

Battery
compartment
cover fixing
screws3-1 Multimeter

Winding
directionsof test leads

Test pins

Clamp
sensor(when stored)

Data hold operation− 3 −4-5 Hz/DUTY Button (ACV · ACA Functions):
Press this button to switch the mode to Hz/DUTY
measurement. Each time this button is pressed when the ACV
or ACA function is selected, the mode switches in the order of
the arrows (g) as shown below.
ACV or ACA measurement g Hz measurement g DUTY
measurement g ACV or ACA measurement.

Test Leads[3] NAME OF COMPONENT UNITS− 2 −1. Never apply an input signal exceeding the maximum
rating input value.
2. Be sure to disconnect the test pins from the circuit whenchanging the function.
3. Always keep your fingers behind the finger guards on
the probe when making measurements.

− 9 −2-2 Features• The instrument is compact and lightweight and has been
designed in accordance with the safety standard EN 61010-1.
• Provided with a current clamp sensor that can measure up to 100
A DC/AC.
• The clamp sensor has a thin U-shaped sensor design that is 7 mm
thick. Also because the inclination angle of the sensor is variable
between 0 ° and 180 °, the display section of the main unit can be
adjusted to an easy-to-view angle.
• Provided with RANGE hold, MAX/MIN hold, REL/ZERO and DATAHOLD functions that are convenient for measurement.
• When the Hz/DUTY measurement function is used during theactivation of the ACV/ACA function, the frequency and duty ratioof the signals that are being measured can also be measured.
• Provided with an Auto Power Off function (approx. 30 min.), which
can also be canceled.
• The storable sections of the test leads and test probes use anelastomeric material that is easy to wind and store.

MAX/MINbutton2-1 Applications
This instrument is a pocket-type digital multimeter with clamp sensor
designed for measurement of weak current circuits (CAT. II 600 V,
CAT. III 300 V). It plays an important role in circuitry analysis using

WARNING①(Black)Maximum overload
protection input[2] APPLICATION AND FEATURES− 5 −Function
DCV
ACV

(Red)

Maximum rating
input value

Note: AC voltage is regulated by rms, values of sinusoidal wave.

− 1 −5-2 Voltage Measurement

Input
terminals

additional functions, as well as enabling measurement of small typecommunication equipment, electrical home appliances, lighting
voltage and batteries of various types.
A current clamp sensor is also provided that can measure up to 100
A DC/AC, allowing measurement of the electric consumption ofequipment that uses an automotive battery or AC power supply. Thiscan be done by simply clamping a single line of electrical wiring in
the device being measured.

− 24 −