DCL1000表紙̲E初.qxd 13.8.7 8:13 PM ページ1

DCL1000
DIGITAL CLAMP METER

INSTRUCTION MANUALDRAWING No.DCL1000 04-1307 2040 6010

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DRAWING No.DCL1000 04-1307 2040 6010

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Table of Contents【1】SAFETY PRECAUTIONS – Before use, read the following safety precautions.
1-1 Explanation of Warning Symbols …………………………001
1-2 Warning Messages for Safe Use …………………………001
1-3 Overload Protection…………………………………………002【2】APPLICATIONS AND FEATURES
2-1 Applications …………………………………………………003
2-2 Features ……………………………………………………003【3】NAMES AND FUNCTIONS OF COMPONENT UNITS
3-1 Names and Functions of the Meter and Test Leads ……004
3-2 Display ………………………………………………………006【4】DESCRIPTION OF FUNCTIONS AND TERMS
4-1 Auto Power Off ………………………………………………007
4-2 AC Detection Method ………………………………………007【5】MEASURING PROCEDURE
5-1 Start-up Inspection …………………………………………008
5-2 Current (ACA) Measurement ………………………………009
5-3 Voltage (V) Measurement …………………………………010
5-4 Resistance, Continuity Buzzer and Diode () ……011【6】MAINTENANCE
6-1 Maintenance and Inspection ………………………………013
6-2 Calibration and Inspection …………………………………013
6-3 Storage ………………………………………………………013
6-4 Battery Replacement ………………………………………013【7】AFTER-SALE SERVICE
7-1 Warranty and Provision ……………………………………014
7-2 Repair ………………………………………………………015
7-3 SANWA web site ……………………………………………016【8】SPECIFICATIONS
8-1 General Specifications ……………………………………017
8-2 Measuring Range and Accuracy …………………………018

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[1] SAFETY PRECAUTIONS*Before use, read the following safety precautions.
This instruction manual explains how to use your new digital clamp
meter DCL1000. Before use, please read this manual thoroughly toensure correct and safe use. After reading it, keep it together withthe product for reference to it when necessary.
Using the product in amanner not specified in this manual may
cause damage to the protection fcnction of the product.
The instructions given under the heading of " WARNING" must be
followed to prevent accidental burn and electric 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 instructions for safe use.
• The warning messages are intended to prevent accidents tooperating personnel such as burn and electric shock.
• The caution messages are intended to prevent incorrect
handling and measurement which may damage the product.
: Risk of Electric shock: Direct current (DC): Ground: Resistance: Alternating current (AC): Diode: Buzzer: Double insulation or reinforced insulation
1-2 Warning Messages for Safe Use

WARNING
The following instructions are intended to prevent personal injury such as
burn and electric shock. Be sure to follow them when using the meter:
1. This is a clamp meter for low-voltage circuits. Be sure to use
it for circuits of voltage-to-ground of 600 Vrms or below.
2. Voltages above 70 VDC or 33 Vrms AC (46.7 V peak) arehazardous to human body. Never touch them.
3. Never input signals exceeding the maximum rated input value(see 1-3).
4. Never use the meter for measuring voltages of lines
connected to equipment (e.g. motors) that generates inducedor surge voltage since it may exceed the maximum allowable
overload input.
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5. Never use the meter near equipment which generates strong
electromagnetic waves or is charged.
6. Never use the meter if the meter or test leads are damaged
or broken.
7. Never use the meter with the case or battery lid removed.
8. During measurement, do not hold a place beyond the barrierof the meter or the test pin side of the flange of the test
leads.
9. To measure a voltage, first connect the black test lead to thenegative (-) or ground side. When disconnecting, thepositive (+) or non-ground side must be disconnected first.
10.During measurement, do not change the meter to anotherfunction.
11.Before starting measurement, make sure that the function
and range are properly set.
12.Never use the meter when it is wet or with wet hands.
13.Be sure to use the specified type of test leads.
14.Never attempt repair or modification, except for battery
replacement.
15.Inspect the meter at least once a year.
16.This meter is for indoor use only.
1-3 Overload Protection
The maximum rated input value and overload protection havebeen established for the signal input part of each function.
Function

Signal Input Part Maximum Rated Input Value Maximum Overload Protection
Clamp type current AC 1000 Armssensor（CT）
DC･AC 600 V
Between +Voltage and current
and - terminal
input prohibited.

AC 1000 Arms
DC･AC 600 V— 2 —DRAWING No.DCL1000 04-1307 2040 6010

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[2] APPLICATIONS AND FEATURES
2-1 Applications
This is an AC clamp meter designed for the IEC measurement
category CAT. III 600 V and is suitable for measurement of AC
current of electrical equipment and power supply facilities.
2-2 Features･Lighter than conventional clamp meters (30 % reduction from
Sanwa equivalent meters) for easy transportation.
･Large “” button to ensure holding of the indicated value.
･Safety design in compliance with the IEC.
･DMM function provided.
･Relative value (RELATIVE) measuring function provided.
PER IEC61010 OVERVOLTAGE INSTALLATION CATEGORYOVERVOLTAGE CATEGORY II
Equipment of OVERVOLTAGE CATEGORY II is energy-consuming
equipment to be supplied from the fixed installation.
Note:
Examples include household, office, and laboratory appliances.
OVERVOLTAGE CATEGORY III
Equipment of OVERVOLTAGE CATEGORY III is equipment in fixedinstallations.
Note:
Examples include switches in the fixed installation and someequipment for industrial use with permanent connection to the
fixed installation.
OVERVOLTAGE CATEGORY IV
Equipment of OVERVOLTAGE CATEGORY IV is for use at theorigin of the installation.
Note:
Examples include electricity meters and primary over-current
protection equipment.

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[3] NAMES AND FUNCTIONS OF COMPONENT UNITS
3-1 Names and Functions of the Meter and Test Leads













Removable test pin covers
When not covered：CAT.Ⅱ 1000 V
When covered：CAT.Ⅲ 600 V

A sensor to clamp a conductor toClamp type current sensor (CT)

Accuracy guarantee range markA range to clamp a conductor to measureCenter position markwhich is guaranteed for accuracy. (See 5-2)

BarrierOpen/close lever

A lever to open and close the clamp sensor.

Display

An LCD to show measured values, etc.

measure. (“Clamp sensor”)

A convex part to prevent fingers from touching an
object to measure during measurement of current.

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buttonPower switch &function switch--- measuring terminal+ measuring terminalbutton(Range hold)button(Relative value measurement)

When thebutton is pressed,
the functions change as follows:
Position: → → →Slide this switch to turn on and off thepower and to select a function.
Insert the black test lead.
Insert the red test lead.
When this button is pressed, the meter will be
set in the manual mode and the range is fixed.
(“” will disappear from the display.) In the
manual mode, each time this button is pressed,
the range changes. While checking the unit anddecimal point on the display, select the best
range. To return to the auto range, hold thisbutton pressed for 1 second or longer. (“”will appear on the display.)
Whenthis buttonis pressed,“ ”willappearon thedisplay and the input value when this is pressed
will be set to 0. To reset, press this button again.
(“ ” will disappear from the display.)
Example: Indication after pressing this button
when 30.00 VDC is input:
Actual input value
DC 30.00 V
DC 35.00 V
DC 25.00 Vbutton(Data hold)Reading
DC 0.00 V
DC 5.00 V
DC - 5.00 V

When this button is pressed, the value indicated will
be held. (“ ” will appear on the display.) The
indicated value will not change if the measurement
input fluctuates. When this button is pressed again,
the hold status will be canceled and the meter will
return to the normal measurement mode. (“ ” will
disappear from the display.)— 5 —DRAWING No.DCL1000 04-1307 2040 6010

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3-2 Display



Numerical value indication.



Negative sign of numerical data.

Indication of AC measurement.



Indication of DC measurement.

Lights in the auto range mode.
Not used.
Lights when the diode test function is used.
Lights when the continuity check function is used.
Lights in the data hold mode.
Warning of low battery power: This mark willappear on the display when the built-in battery has
been discharged and its voltage has dropped to
below about 2.4 V. When this mark flickers or
lights, replace the battery with a new one.

Lights in the relative mode (REL).
Not used.
Unit of measurement.
n, µ, F, %, ˚C and ˚F are not used.

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[4] DESCRIPTION OF FUNCTIONS AND TERMS
4-1 Auto Power Off
If no switch or button is operated for about 30 minutes after poweron, the power will automatically be turned off and the display will
become blank.
To reset the meter, press any button or remove the test leads orthe clamp sensor (CT) from an object to measure and set thefunction switch to OFF.
*In the auto power off mode, a very small amount of current
keeps flowing. Therefore, when measurement has been
finished, be sure to return the function switch to the OFF
position.
*The auto power off function cannot be canceled.
4-2 AC Detection Method
This meter employs the average value method and therefore
indicates an average value of voltage or current in the positive
half cycle. No error will occur in measurement when the input
waveform is sinusoidal wave with no distortion. However, if the
input waveform is distorted sinusoidal wave or non-sinusoidal
wave, an error of magnitude proportional to waveforms will occur.

[5] MEASURING PROCEDUREWARNING
1. Do not apply an input signal exceeding the maximum rated input ofeach function.
2. During measurement, do not change the function switch.
3. During measurement, do not hold a place beyond the barrier of themeter or the test pin side of the flange of the test leads.
4. When measurement has been finished, remove the clamp sensor(CT) and test leads from the object measured and return the function
switch to the OFF position.

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5-1 Start-up Inspection

CAUTION
1. Be sure that when the power switch is turned on, the battery low
warning mark () is not flickering or lit. If it is flickering or lit, replace
the battery with a new one. (See 6-4.)
2. Do not use the meter if the meter or test lead is damaged or broken.
3. Make sure the test leads are not cut.
Always conduct the start-up inspection to ensure safety.
Inspection start

Meter ortest leads
not broken?

Broken.

Not broken.
1. Set with function
switch and selectbutton.
2. Short red andblack test pins.

Ω appears?
Buzzer sounds?

Does not appear.
Does not sound.

Appears/sounds.
No problem.
Measurement can be started.

Request for repair.

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5-2 Current (ACA) Measurement

WARNING
Remove the test leads from the measuring terminals to avoid electric shock.
Function

Max rated input value

Range

ACA

AC 1000 A

400.0 A, 1000 A

ACA measurement
A
CenterB

SW position

Accuracy
guaranteed area

Remarks:• This meter is of average value response.
Frequency range: 50/60 Hz (Sinusoidal wave AC)• If vibration noise occurs in the clamp sensor (CT) part whenmeasuring a large current above 100 A, it is not a failure.
• For accuracy when the indicated value is 15 % of the range or
less, 8 dgt is added to the accuracy shown in 8-2.
• An induction error below 0.06 A/A may occur due to influence of
current flowing in adjacent conductors.
• It may malfunction when measuring voltage/current in the inverter circuit.
A guide for a range of conductor positions for accuracy
guarantee
When an object is measured at the center of the clamp sensor(CT), the specified accuracy (see 8-2) can be obtained. In otherplaces of conductors to be measured, the accuracy is as follows:
A area: 4 % is added to the specified accuracy.
B area: 1 % is added to the specified accuracy.
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5-3 Voltage (V) measurement
Function

Max rated input value

Range

DCV
ACV

DC 600 V
AC 600 V

400.0 mV, 4.000 V, 40.00 V, 400.0 V, 600 V
400.0 mV, 4.000 V, 40.00 V, 400.0 V, 600 V

ACV measurement

DCV measurement

SW position

SW position

Remarks:• Average value response and the frequency range is 50/60 Hz.
• The AC 400.0 mV range is set with the
button.
• In the 400.0 mV range, the input resistance is approx. 1000 MΩ and inother ranges, it is approx. 10 MΩ.
• In the 400.0 mV range, the indication may fluctuate when the test leads
are released. It is not a failure.
• When the measuring terminals are shorted, the indication may not become zero.
• When measuring DCV, if a voltage is applied to the measuring terminals
with + and – polarity reversed, a voltage value with “–” sign is indicated.
• It may malfunction when measuring voltage/current in theinverter
circuit.
• “OL” indication is not appear at 600 V (both auto / manual) range.
Use caution with over voltage input.
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5-4 Resistance, Continuity Buzzer and Diode ()

WARNING
Never apply a voltage to the input terminals.
5-4-1 Resistance (Function) measurement

Max rated input value

Range

400.0 Ω, 4.000 kΩ, 40.00 kΩ,
40.00 MΩ
400.0 kΩ,4.000 MΩ, 40.00 MΩ
Open circuit voltage: Approx. 0.4 VDC
5-4-2 Continuity check ( )Measuring range: 0  400.0 ΩBuzzer sound range: 0 Ω  65 Ω (±55 Ω)Open circuit voltage: Approx. 0.4V DV
5-4-3 Diode test ( )Open circuit voltage: Approx. 1.6 VDC
Measuring current: 0.4 mA (typical)
Remarks:• If resistance measurement is affected by noises, shield theobject to measure with – potential.
• If measurement is conducted with a finger touching the test pins,
an error will occur due to influence of resistance of the body.
• The area under voltage cannot be measured.

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5-4-1 Resistancemeasurement

5-4-2
Continuity check

Resistor

5-4-3 Diode test

SW position
Good:Forward voltage Good:OL shown
Bad : Other
drop shown
indication
Bad : 0.000 V shownforward diase

reverse diase

Each time the SELECT button is pressed, the functions change as
indicated by → in the figure.
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DCL1000̲英初.qxd 13.8.7 7:37 PM ページ13[6] MAINTENANCEWARNING
1. The following instructions are very important for safety. Readthis manual thoroughly to ensure correct maintenance.
2. Calibrate and inspect the meter at least once a year to ensure
safety and maintain its accuracy.
6-1 Maintenance and Inspection
1) Appearance: Is the meter not damaged due to falling or other cause?
2)Test leads: Are the test leads not damaged, or is the core wire
not exposed from any part or broken?
If any of the above problems exists, stop using themeter and request for repair.
6-2 Calibration and Inspection
For more information, please contact your dealer or Sanwa agent.
6-3 Storage

CAUTION
1. The panel and case are not resistant to volatile solvent and must not
be cleaned with thinner or alcohol.
2. The panel and case are not resistant to heat. Do not place the meternear heat-generating devices.
3. Do not store the meter in a place where it may be subjected tovibration 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 is anticipated.
5. If the meter will not be used for a long time, remove the battery.
6-4 Battery Replacement
Battery when the meter is shipped:
A battery for monitoring has been installed prior to shipment from thefactory. It may be discharged before the expiration of the describedbattery life.
*The battery for monitoring is a battery used to check thefunctions and performance of the product.
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WARNING
If the rear case is removed with an input being applied to themeasuring terminals, you may suffer electric shock. Before
starting replacement, always make sure no input is being
applied and the function switch is.
 Remove the battery lid screws(2 pieces) with a screwdriver.
 Take out the battery andreplace it with a new one.
Battery: R03 1.5 V x 2 pieces.
 Attach the battery lid andsecure it with screws.

[7] After-Sales Service
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 todetermine the extent to which the warranty policy shall apply. This
warranty shall not apply to disposables batteries, or any productor parts, which have been subject to one of the following causes:— 14 —DRAWING No.DCL1000 04-1307 2040 6010

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1. A failure due to improper handling or use that deviates 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 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 above 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.
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
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years after the discontinuation of manufacture. Thisretention period is the repair warranty period. Please note,however, if such functional parts become unavailable forreasons 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 shallbe borne by the customer.
7-3 SANWA web site
http://www.sanwa-meter.co.jp
E-mail: exp_sales@sanwa-meter.co.jp— 16 —DRAWING No.DCL1000 04-1307 2040 6010

DCL1000̲英初.qxd 13.8.7 7:37 PM ページ17[8] SPECIFICATIONS
8-1 General Specifications
Operation method∆-∑ method
AC Sensing
Average value
LCD
4000 counts
Sampling rate
3 times/sec nominal
Range selection
Auto and Manual
Over-range indication “OL” appears on the numerical part, but does
not appear when measuring voltage.
Polarity indication“-” indicated only when negative input.
” lights or flickers at about 2.4 V or below.
Low battery indication “Environmental condition Altitude 2000 m or below, pollution degree II.
Operating temperature / 5 ˚C to 40 ˚C and maximum relative humidity 80 %humidity
for temperature up to 31 ˚C decreasing linearly to
50 % relative humidity at 40 ˚C (No condensation)
Storage temperature / -20 ˚C ~ 60 ˚C, 70 %R.H or below (with battery
humidity
removed).
Power supply
R03 1.5 V x 2 pieces
2.2 mA at DCV (typical)
Power consumption
Battery life
Approx. 120 hours at DCV
Safety standards
IEC61010-1, IEC61010-2-032, IEC61010-2-033
CAT.III 600 V
IEC61010-031

EMC

Clamp sensor (CT)clamp size
Dimensions
Mass
Auto power off
Accessories

IEC61326
In an RF field of 3 V/m:
Total Accuracy = Specified Accuracy + 45 digits
Performance above 3 V/m is not specified
Max. 42 mm
238(L) X 95(W ) X 45(H ) mm
Approx. 290 g (battery included)
About 30 min. after power on.
test leads (TL-23a), carrying case (C-DCL1000),
instruction manual— 17 —DRAWING No.DCL1000 04-1307 2040 6010

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8-2 Measuring Range and Accuracy
Temperature: 23±5 ˚C, humidity: 75 % RH max., built-in battery
voltage 2.4 V or above.
rdg (reading): Read value, dgt (digit): Number of counts of last
digit
ACA
Range
400.0 A

Accurac±(1.7 %rdg+5dgt）

1000 A±(1.7 %rdg+5dgt）

Remarks･ This meter is of average value response.
Frequency range: 50/60 Hz (Sinusoidal wave AC)･ Accuracy is specified when an object is measured
at the center of the clamp sensor (CT),･ A guide for a range of conductor positions
for accuracy guarantee
In other places of conductors to bemeasured, the accuracy is as follows:
A area: 4 % is added to the specified
accuracy.
B area: 1 % is added to the specified
accuracy.

A
CenterB･ For accuracy when the indicated value is 15 % of
the range or less, 8 dgt is added to the accuracy.
･ An induction error below 0.06 A/A may occur due toinfluence of current flowing in adjacent conductors.
･ It may malfunction when measuring voltage/current in
the inverter circuit.

DCV
Range
400.0 mV
4.000 V
40.00 V
400.0 V
600 V

Accuracy
Input Impedance±(1.2 %rdg+3dgt） Approx. 1000 MΩ±(1.9 %rdg+3dgt）

Remarks

Approx. 10 MΩ±(2.2 %rdg+4dgt）— 18 —DRAWING No.DCL1000 04-1307 2040 6010

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ACV
Range Frequency range
400.0 mV 50 Hz〜500 Hz
50 Hz/60 Hz
4.000 V
60 Hz〜500 Hz
50 Hz/60 Hz
40.00 V
60 Hz〜500 Hz
50 Hz/60 Hz
400.0 V
60 Hz〜500 Hz
600 V 50 Hz〜500 Hz

Accuracy±(4.2 %rdg+5dgt)±(2.2 %rdg+5dgt)±(2.7 %rdg+5dgt)±(2.2 %rdg+5dgt)±(2.7 %rdg+5dgt)±(2.2 %rdg+5dgt)±(2.7 %rdg+5dgt)±(3.2 %rdg+5dgt)

Input Impedance

Remarks

The AC 400.0
mV range is set
Approx. 10 MΩ
with the RANGE
button.

It may malfunction when measuring voltage/current in the inverter
circuit.

Range
400.0 Ω
4.000 kΩ40.00 kΩ
400.0 kΩ
4.000 MΩ
40.00 MΩ

Accuracy±(1.7 %rdg+6dgt）±(1.2 %rdg+4dgt）

Remarks

Open circuit voltage: Approx DC 0.4 V±(1.7 %rdg+4dgt）±(2.7 %rdg+4dgt）

Continuity Check ( )Measuring range: 400.0 ΩBuzzer sound range: 0 Ω65 Ω (±55 Ω)Open circuit voltage: Approx. 0.4 VDC
Diode test ( )Open circuit voltage: Approx.1.6 VDC
Test current: 0.4 mA (typical)— 19 —DRAWING No.DCL1000 04-1307 2040 6010

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本社=東京都千代田区外神田2−4−4･･電波ビル
郵便番号=101-0021･･電話=東京（03）3253−4871㈹大阪営業所=大阪市浪速区恵美須西2−7−2
郵便番号=556-0003･･電話=大阪（06）6631−7361㈹SANWA ELECTRIC INSTRUMENT CO.,LTD.
Dempa Bldg., 4-4 Sotokanda2-Chome Chiyoda-Ku,Tokyo,Japan

大豆インキを使用しています。

This manual emplys soy ink.

04-1307 2040 6010

DRAWING No.DCL1000 04-1307 2040 6010