[1] SAFETY PRECAUTIONS*Before use, read the following safety
precautions.
This instruction manual explains how to use
your digital leakage clamp meter DLC470.
Before use, please read this manual thoroughly
to ensure correct and safe use. After reading it,
keep it together with the product for reference
to it when necessary.
Using the product in a manner not specified inthis manual may cause damage to the protection
function of the product.
The instructions given under the headings ofWARNING andCAUTION must be followed
to prevent accidental burn and electric shock.

DLC470DIGITAL LEAKAGE
CLAMP METER
INSTRUCTION MANUAL

Dempa Bldg., 4-4 Sotokanda 2-Chome Chiyoda-ku, Tokyo, Japan

1-1 Explanation of Warning Symbols
The meanings of the symbols used in thismanual and attached to the product are as
follows:: Very important instructions for safe use.
The warning messages are intended toprevent accidents to operating personnel
such as burn and electric shock.
The caution messages are intended toprevent incorrect handling which may
damage the product.
: High voltage hazard: Ground: Resistance		: Buzzer: Backlight		
: Double insulation or reinforced insulation

02-2205 2040 6011

1-2 Warning Messages for Safe Use- MEMO -WARNING
The following instructions are intended toprevent personal injury such as burn andelectric shock.
Be sure to follow them when using the meter.
1. Never use the meter for the power lines
exceeding 600 Vrms to ground.
2. Voltages over AC 30 Vrms (42.4 Vpeak)or DC 60 V are hazardous to humanbody. Take care so as not to touch them.
3. Never input signals exceeding themaximum rated input value (see 1-3).
4. Never use the meter near equipment
which generates strong electromagnetic
waves or is charged.
5. Never use the meter if the meter or test
leads are damaged or broken.
6. Never use the meter with the case orbattery lid removed.
7. During measurement, keep your fingers
behind the finger guard of test leads
and the meter of the test leads.
8. During measurement, do not change
function switch of the meter nor replace
the plugs to other terminals.
9. Before starting measurement, makesure that the function and range areproperly set.
10. Never use the meter when it is wet orwith wet hands.
11. Be sure to use the specified type of testleads.
12. Never attempt repair or modification,
except for battery replacement.
13. Always conduct start-up inspection andcheck the meter at least once a year.
14. This meter is for indoor use only.

1-3 Overload Protection

3-2 Display

The maximum rated input value and overload
protection have been established for the input
terminals of each function.
Function

Input
Terminal

DCV･ACVandACmA
ACA

CTMax. RatedInput Value
DC/AC600 VDo not input
voltage

AUTO POWER OFFDATA HOLD

Low battery indication

Max. Overload
Protection

BPF
ACMinuspolarity

DC/AC660 V

Digit anddecimal pointDC

AC 600 mA

AC 100 A

AC 400 A

AC 450 A

MAXMINUNIT

3-3 Test Lead
Removal test pins cover[2] APPLICATIONS AND FEATURES

Test probe(red)Test pins

2-1 Applications
This is a digital leakage clamp meter designed
for measurement in the ranges of CAT. III 600 V.
This meter is useful for measuring leakage orload current on power lines and equipment.

Plugs

Compatible to IEC61010 CAT.III
Extract frequency range of mainly ACmA 50
Hz / 60 Hz and ACA, with band-pass filter
functions.
• Measures mA with resolution 0.01 mA• MAX MIN hold and data-holding functions• Backlight function• Auto Power Off function••

Measurement categories (Overvoltagecategories)
CAT. II : Primary circuit of equipment with apower cord to be connected to a mains
socket.
CAT.III : Primary circuit of equipment that inputs
power directly from the distributor and thecircuit from the distributor to the mains
socket.
CAT.IV : Circuit from the leading wire to thedistributor.

[3] NAMES OF COMPONENT UNITS
3-1 Main unit

4-4 MAX/MIN function
When the MAX/MIN button is pressed, themeter enters MAX/MIN mode, fixes ameasuring range and turns
on. Press
the button, to read MAX, MIN, current reading
sequence. Press the button for 1 sec. or more
to exit the MAX/MIN mode.
Remarks:
Function changes or functional operations willcancel the function.

4-5 BACKLIGHT function

Finger guards

2-2 Features

Remarks:• Readings of current are not properly in BPF
function if measuring current frequency isother than 50/60 Hz.
• If the measured current contains extremelyl ar g e n o i se, i t m ay n o t be po ssi bl e t omeasure correctly.

Test probe(black)

In case of test pins cover attached: CAT.III 600V
In case of test pins cover removed: CAT.II 1000V[4] DESCRIPTION OF FUNCTION
4-1 Power Switch and function switch
Turn this switch to turn on and off the powerand select a measuring function.

4-2 Data Hold function
When the HOLD button is pressed, the reading
indicated will be held withon thedisplay. The indicated reading will not change if
the input signal is changed. When this button ispressed again, the function will be disabled andthe meter will return to the measurement mode.
Remarks:
The function will be canceled at changing
measurement functions.

•When the backlight button is pressed, thebacklight will be turned on. To disable thefunction, the button is pressed again. The
backlight will be automatically turned off about
30 seconds after it is turned on.

Always conduct the start-up inspection toensure safety.
1. Be sure that when the meter is turned on, thelow battery indication
is not flickering orlit. If it is flickering or lit, replace the batteries
with new ones.
2. Do not use the meter if the meter or test leadis damaged or broken.
3. Make sure the test leads are not cut.
4. Make sure the meter and your hand are not wet.

5-2 Current Measurement ACmAWARNING
Remove the test leads from the measuringterminals to avoid electric shock.

ACmA current measurement
Zero-phase current
clamp all of wires

4-6 AUTO POWER OFF function
The meter will go to AUTO POWER OFF function
to save battery life about 30 minutes after thelast function switch or button operation. To wakeup the meter, press any button or re-power on.
turns on while activating the function.

ACmA

Remarks:
Even in the AUTO POWER OFF mode, thetiny power is still consumed. When the meter
is not going to be used for an extended
period of time, be sure to turn off the powerswitch.

••

To disable the function, turn the function
switch to position other than OFF while
holding the HOLD button.
on the display isturned off when the AUTO POWER OFFfunction is disabled.

4-3 BPF Button (ACmA & ACA Function)

4-7 Low Battery indication

Will switch to no-filter mode → BPF 50 Hz → BPF
60 Hz → no-filter mode each time you press thebutton. With this BPF function, you can extract
the frequency in which you would like to measure.

When the built-in batteries have beendischarged and the voltage has dropped tobelow about 2.2 V,appears on the display.
When the mark flickers or lights, replace both
two batteries with new ones.

Remarks:Frequency Response
50 Hz BPF: Using 25 Hz - decrease to 15 %(-16 dB), 100 Hz - decrease to 4 % (-27 dB)
60 Hz BPF: Using 30 Hz - decrease to 15 %(-16 dB), 120 Hz - decrease to 4% (-27 dB)

5-1 Start-up Inspection

ACmA current measurement
Zero-phase current
clamp earth wireACmA••

BPF frequency response curve

Current Sensor (CT)BarrierCT trigger
Power / Function switch
HOLD button
BPF button
MAXMIN button[5] MEASURING PROCEDUREWARNING
1. Do not apply an input signal exceeding
the maximum rated input of eachfunction.
2. During measurement, do not change
the function switch.
3. During measurement, keep your finger
behind the finger guard of the test leadand the meter.
4. When measurement has been finished,remove the test leads and CT from theobject measured and turn the function
switch to OFF position.

Remarks:• Clamp the conductor (cable) to measure at
the center of the trans core (CT).
• To measure zero-phase current, clamp only
earth wire or all of wires like 2-core or 3-corewire together.
• The meter may malfunction in places where astrong magnetic field is present.
• Do not apply voltage and current at the same
time.

− 4 −

− 5 −

Backlight button

Display
Input Terminal (-)
Input Terminal (+)− 1 −− 2 −− 3 −DRAWING No. DLC470 02-2205 2040 6011

5-3 Current Measurement (ACA)

5-5 Resistance Measurement, Continuity
CheckWARNINGWARNING

Remove the test leads from the measuringterminals to avoid electric shock.

Never apply a voltage to the input terminals.

ACA current measurement

Resist ance measurement
Continuity check

ResistorContinuity

ACA

6-3 Storage
WARNING
1. The panel and case are not resistant tovolatile solvent and must not be cleaned
with thinner or alcohol.
2. The panel and case are not resistant toheat. Do not place the meter near heatgenerating devices.
3. Do not store the meter in a place where
it may be subjected to vibration or from
where it may fall.
4. Do not store the meter in places under
direct sunlight, or hot, cold or humid
places or places where condensation isanticipated.
5. If the meter will not be used for a longtime, remove the batteries.

6-4 Battery Replacement

below 30 ohm

Remarks:• Clamp the conductor (cable) to measure at
the center of the trans core (CT).
• Clamp only one cable. If several cables areclamped together or 2-core or 3-core cordsor cables are clamped, current cannot bemeasured accurately.
• The meter may malfunction in places where astrong magnetic field is present.
• Do not apply voltage and current at the sametime.

5-4 Voltage Measurement (ACV DCV)WARNINGTo avoid electric shock, do not remove thebattery door with an input being applied tothe measuring terminals. Also, before
starting replacement, make sure the powerof the meter is OFF.

[6] MAINTENANCEWARNINGWARNING
Never use the meter in power lines
exceeding 600 V to ground.

AC voltage
measurement

Remarks:• Reading is 30 ohm or below, buzzer sounds.
• Open voltage: approx. 0.9 VDC voltage
measurement

Batteries when the meter is shipped:
A battery for monitoring has been installedprior to shipment from the factory. It may bedischarged before the expiration of thedescribed battery life.
*The battery for monitoring is a battery used tocheck the functions and performance of theproduct.

1. The following instructions are very
important for safety. Read this manual
thoroughly to ensure correct maintenance.
2. Calibrate and inspect the meter at least
once a year to ensure safety and maintainits accuracy.

1. Remove the fixing screw of the battery lid
with a minus screwdriver.
2. Replace both two batteries in the battery
holder with new ones. (Pay attention to theirpolarity.)
3. Set and secure the battery door with thefixing screw as before.

DCV[8] SPECIFICATIONS

7-1 Warranty and Provision

8-1 General Specifications

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
in workmanship or material under normal use forthe period of one (1) year from the date ofpurchase.
This warranty policy is valid within the country ofpurchase only, and applied only to the productpurchased from Sanwa authorized agent ordistributor.
Sanwa reserves the right to inspect all warranty
claims to determine the extent to which thewarranty policy shall apply. This warranty shallnot apply to disposables batteries, or any
product or parts, which have been subject toone of the following causes:
1. A failure due to improper handling or use thatdeviates from the 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 thisproduct such as fire, flood and other naturaldisaster.
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 when requesting services:
1. Customer name, address, and contact
information
2. Description of problem
3. Description of product configuration
4. Model Number
5. Product Serial Number6. Proof of Date-of-Purchase
7. Where you purchased the productPlease contact Sanwa authorized agent /distributor / service provider, listed in ourwebsite, in your country with above information.
An instrument sent to Sanwa / agent / distributor
without above information will be returned to thecustomer.
Remarks:
1) Prior to requesting repair, please check thefollowing: Capacity of the built-in battery, polarity
of installation and discontinuity of the test leads.
2) Repair during the warranty period: The failed meter
will be repaired in accordance with the conditionsstipulated in 7-1 Warranty and Provision.
3) Repair after the warranty period has expired: Insome cases, repair and transportation cost may
become higher than the price of the product.
Please contact Sanwa authorized agent /distributor / service provider in advance.
The minimum retention period of service functionalparts is 6 years after the discontinuation ofmanufacture. This retention period is the repair
warranty period. Please note, however, if suchfunctional parts become unavailable for reasons ofdiscontinuation of manufacture, etc., the retention
period may become shorter accordingly.
4) Precautions when sending the product to berepaired.
To ensure the safety of the product duringtransportation, place the product in a box that islarger than the product 5 times or more involume and fill cushion materials fully and thenclearly mark “Repair Product Enclosed” on thebox surface. The cost of sending and returning
the product shall be borne by the customer.

6-1 Maintenance and Inspection

ACV[7] AFTER-SALE SERVICE

1) Appearance:
Is the meter not damaged due to falling orother cause?
2) Test leads:
Are the core wires not exposed at any placeof the test leads?
Is the plug when inserted to the input
terminal not loose?
If any of the above problems exists, stop using
the meter and request for repair.

6-2 Calibration and Inspection
For more information, please contact Sanwa’ s
authorized agent / distributor service provider,listed in our website. See section 7-3.

7-3 SANWA web site

8-2 Measuring Range and Accuracy
Temperature: 23 °C ± 5 °C, humidity: 80 %RH
max. (no condensation)rdg (reading): Read value.
dgt (digit): Number of counts of last digit.

Operation
methodDouble integration

AC measuring

Average sensing

ACmA

Display

6000 counts for A / V
9999 counts for
Resistanceand Continuity check

Function

Sampling rate

Approx. 2 times / sec.

Over-range“OL” indication

Range selection

AutoPolarity switching Auto (- indication)
Low Battery
indication

lights when built-in battery
voltage is 2.2 V or below

Max. clamp
conductor
diameterΦ 40 mm
35 mm (open CT size)

Environmental
condition

Altitude up to 2000
meters, indoor use
pollution degree 2Operatingtemperature

5 ºC to 40 ºC.
Humidity range is asfollows (withoutcondensation):Max. 80 %RH fortemperatures up to31 °C decreasing linearly
to 50 % relative humidity
at 40 °C

Storagetemperature-10 ºC to 40 ºC: ≤80 %RH(without condensation).
40 ºC to 50 ºC: ≤70 %RH(without condensation).
(Batteries should beremoved when the
instrument is not to be
used for a long period.)

Power supply

LR03 x 2 pcs

Auto Power Off

Power Off in about 30
mins. after the lastoperation.

Powerconsumption

Approx. 70 mW TYP.

Battery life

Approx. 42 hours(backlight off)

Dimensions &mass

H206 x W83 x D38 mm
Approx. 320 g (batteriesincluded)

Safety standards

IEC61010-1 CAT.III 600V,
IEC61010-2-032,
IEC61010-031

EMC Directive

IEC61326 (EMC)

RoHS Directive

EN50581 (RoHS)

Standard
Accessories

Manual, Test leads(TL-21a), Carrying case
(C-DCM600)

Range

Accuracy

60.00 mA

50 Hz / 60 Hz± (1. 2 %rdg + 5 dgt)

600.0 mA

40 Hz ~ 400 Hz± (2.5 %rdg + 10 dgt)

Range

Accuracy

60.00 A

0 A ~ 200 A
50 Hz / 60 Hz± (1. 2 %rdg + 5 dgt)
40 Hz ~ 400 Hz± (2.5 %rdg + 10 dgt)

400.0 A

200.1 A ~ 400 A
50 Hz / 60 Hz± (2.0 %rdg + 5 dgt)
40 Hz ~ 400 Hz± (5.0 %rdg + 10 dgt)

ACmA

ACA
Function

ACA

Remarks:• Accuracy is specified at the center of CT.
• Add 0.3 % rdg to the accuracy of 50 Hz incase of the 50 Hz BPF mode.
• Add 0.3 % rdg to the accuracy of 60 Hz incase of the 60 Hz BPF mode.

ACV
Function

Range

Accuracy

ACV

600.0 V± (1.2 %rdg + 5 dgt)

Remarks:• Input impedance: Approx 1M ohm• Accuracy assured frequencies: 40 Hz ~ 400Hz (sine wave)

DCV
Function

Range

Accuracy

DCV

600.0 V± (1.0 %rdg + 2 dgt)

Remarks:• Input impedance: Approx 1M ohm

Resistance and Continuity check
Function

Range

Accuracy999.9 Ω± (1.0 %rdg + 8 dgt)

Remarks:• Open voltage: Approx 0.9 V• Buzzer sounds : Less than 30 ohms

https://www.sanwa-meter.co.jp
E-mail: exp_sales@sanwa-meter.co.jp

− 6 −

− 7 −

− 8 −

− 9 −

− 10 −− 11 −DRAWING No. DLC470 02-2205 2040 6011