Sanwa DLC470 Manual

Sanwa Måleudstyr DLC470

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[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 in

this manual may cause damage to the protection

function of the product.

The instructions given under the headings of

WARNING and CAUTION must be followed

to prevent accidental and burn electric shock.

1-1 Explanation of Warning Symbols

The meanings of the symbols used in this

manual and attached to the product are as

follows:

: Very important instructions for safe use.

The warning messages are intended to

prevent accidents to operating personnel

such as burn and electric shock.

The caution messages are intended to

prevent incorrect handling which may

damage the product.

: High voltage hazard : Ground

: Resistance : Buzzer

: Backlight

: Double insulation or reinforced insulation

1-2 Warning Messages for Safe Use

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. 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 human

body. Take care so as not to touch them.

3. Never input signals exceeding the

maximum 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 or

battery 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, make

sure that the function and range are

properly set.

10. Never use the meter when it is wet or

with wet hands.

11. Be sure to use the specified type of test

leads.

12. Never attempt repair or modification,

except for battery replacement.

13. Always conduct start-up inspection and

check the meter at least once a year.

14. This meter is for indoor use only.

1-3 Overload Protection

The maximum rated input value and overload

protection have been established for the input

terminals of each function.

Function Input

Terminal

Max. Rated

Input Value

Max. Overload

Protection

DCV･ACV

and

DC/AC

600 V DC/AC

660 V

Do not input

voltage

ACmA CT AC 600 mA AC 100 A

ACA AC 400 A AC 450 A

[2] APPLICATIONS AND FEATURES

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 or

load current on power lines and equipment.

2-2 Features

•

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 (Overvoltage

categories)

CAT. II : Primary circuit of equipment with a

power cord to be connected to a mains

socket.

CAT.III :

Primary circuit of equipment that inputs

power directly from the distributor and the

circuit from the distributor to the mains

socket.

CAT.IV :

Circuit from the leading wire to the

distributor.

[3] NAMES OF COMPONENT UNITS

3-1 Main unit

Current Sensor (CT)

Barrier

CT trigger

Power / Function switch

HOLD button

BPF button

MAXMIN button

Display

Input Terminal (-)

Input Terminal (+)

Backlight button

3-2 Display

AUTO POWER OFF

Minus

polarity

Low battery indication

MAXMIN

Digit and

decimal point

BPF

DATA HOLD

UNIT

3-3 Test Lead

es pint s

T t )es probe(red

Finge guardr s

T t )es probe(blackPlugs

Remova tes pin covel t s r

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 power

and select a measuring function.

4-2 Data Hold function

When the HOLD button is pressed, the reading

indicated will be held with on the

display. The indicated reading will not change if

the input signal is changed. When this button is

pressed again, the function will be disabled and

the meter will return to the measurement mode.

Remarks:

• The function will be canceled at changing

measurement functions.

4-3 BPF Button (ACmA & ACA Function)

Will switch to no-filter mode BPF 50 Hz → → BPF

60 Hz no-filter mode each time you press the →

button. With this BPF function, you can extract

the frequency in which you would like to measure.

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)

• BPF frequency response curve

Remarks:

• Readings of current are not properly in BPF

function if measuring current frequency is

other than 50/60 Hz.

• If the measured current contains extremely

la r ge n oise, i t may not be pos sib l e to

measure correctly.

4-4 MAX/MIN function

When the MAX/MIN button is pressed, the

m e t e r e n t e r s M A X / M I N m o d e , f i x e s a

measuring 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 will

cancel the function.

4-5 BACKLIGHT function

When the backlight button is pressed, the

backlight will be turned on. To disable the

function, the button is pressed again. The

backlight will be automatically turned off about

30 seconds after it is turned on.

4-6 AUTO POWER OFF function

The meter will go to AUTO POWER OFF function

to save battery life about 30 minutes after the

last function switch or button operation. To wake

up the meter, press any button or re-power on.

turns on while activating the function.

Remarks:

• Even in the AUTO POWER OFF mode, the

tiny 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 power

switch.

• To disable the function, turn the function

switch to position other than OFF while

holding the HOLD button. on the display is

turned off when the AUTO POWER OFF

function is disabled.

4-7 Low Battery indication

W h en t h e bu i l t -i n b a t t er i es h a v e b ee n

discharged and the voltage has dropped to

below about 2.2 V, appears on the display.

When the mark flickers or lights, replace both

two batteries with new ones.

[5] MEASURING PROCEDURE

Do not apply an input signal exceeding

t h e m a xi m u m r a t ed i n p u t of ea c h

function.

2. During measurement, do not change

the function switch.

3. During measurement, keep your finger

behind the finger guard of the test lead

and the meter.

4. When measurement has been finished,

remove the test leads and CT from the

object measured and turn the function

switch to OFF position.

DIGITAL LEAKAGE

CLAMP METER

INSTRUCTION MANUAL

02-2205 2040 6011

DLC470

5-1 Start-up Inspection

Always conduct the start-up inspection to

ensure safety.

1.Be sure that when the meter is turned on, the

low battery indication is not flickering or

lit. If it is flickering or lit, replace the batteries

with new ones.

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.

4.

Make sure the meter and your hand are not wet.

5-2 Current Measurement ACmA

Remove the test leads from the measuring

terminals to avoid electric shock.

ACm curren measuremenA t t

Zero-phas currene t

clam al wirep l of s

ACm curren measuremenA t t

Zero-phas currene t

clam eart wirp h e

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-core

wire together.

• The meter may malfunction in places where a

strong magnetic field is present.

• Do not apply voltage and current at the same

time.

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

- MEMO - WARNING

WARNING

Produkt Specifikationer

Mærke:	Sanwa
Kategori:	Måleudstyr
Model:	DLC470

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