[1] SAFETY PRECAUTIONS
Before use, read the following safety precautions.
This instruction manual explains how to safely use your new DCL11R digital clamp
meter. Before use, please read this manual thoroughly. After reading it, keep it
together with the product so you can refer to it when necessary. If this product is not
used as specified in this manual, its protection function may be compromised.
To avoid accidental burns or electric shock, always follow any instructions with
“ WARNING” or “ CAUTION” headings.
1-1 Explanation of Warning Symbols
The meanings of the symbols used in this manual and on the product are explained below.
: Very important instructions for safe use
•Warning messages are intended to prevent accidents to operating
personnel such as burn and electric shock.
•Caution messages are intended to prevent damage to the instrument.
The meanings of the symbols used exclusively on the product are explained below.
: Symbol requesting reference to the instruction manual before use
: Potential of connection to a power line in live status
: Double in sulation or reinforced insulation
: Power switch
: Backlight
1-2 Warning Instructions for Safe Use
To avoid physical injury such as burns or electric shock, be sure to observe
the following instructions when using this instrument.
1. This instrument is a digital clamp meter for low voltages. It should be
used on power lines with a voltage to ground of 300 Vrms or less.
2. Pay special attention when measuring voltages of AC 33 Vrms (46.7 V peak)
or DC 70 V or more to avoid injury. Also use insulating protective equipment
as required.
3. Never use the instrument on power lines that exceed the maximum rated
input current (see 1-3).
4. Do not use the instrument if the main unit is damaged or broken.
5. Do not use the instrument with the case or battery compartment cover removed.
6. Do not hold the measurement clip at any point beyond the barrier.
7. Do not use the instrument when it or your hand is wet.
8. Do not attempt to repair or modify the instrument except to replace the batteries.
9. Be sure to check the instrument before each use and inspect it at least once a year.
10. Always use the instrument indoors.
11. To avoid compromising the protection function of this instrument, do not
use it in any way other than instructed in this manual.
* Voltage to ground of 300 Vrms or less: When the Y-connection voltage is 415 V,
the voltage to ground is equal to 415 /
3
≒
240 V.
1-3 Overload Protection Input Values
Input
Max. rated input current
Max. overload protection input
Clamp sensor
AC 320 A
AC 350 A
[2] APPLICATIONS AND FEATURES
2-1 Application
This instrument is an AC clamp meter with RMS response that allows you to
measure the current range specified in IEC 61010-1 CAT. III 300 V. It is suitable
for measuring the current of low-voltage power lines and electrical appliances.
2-2 Features
• Safety design that complies with IEC61010-1 CAT. III 300 V
• Compact pocket size
• True RMS conversion
• Auto power OFF (approx. 15 min.) (Disabling also possible)
• Backlight
Measurement Category (Overvoltage Category)
Equipment of CAT II :
Primary cable runs of power-consuming equipment from a wall socket.
Equipment of CAT III :
Primary cable runs of equipment directly connected to a distribution board
and cable runs from a distribution board to wall sockets.
Equipment of CAT IV :
Cable runs from an incoming line to a distribution board.
01-1507 2040 6011
Correct
○
Incorrect
×
Clamping single conductor on
the center of clamp sensor.
Clamping multiple conductors.
Force applied to the tip of
clamp sensor.
DCL11R
DIGITAL CLAMP METER
INSTRUCTION MANUAL
Dempa Bldg
.
, 4-4 Sotokanda 2-Chome
Chiyoda-ku, Tokyo, Japan
This manual emplys soy ink.
WARNING
[3] NAME OF COMPONENT UNITS
3-1 Main unit
MAX 300A
300V CAT.III
3-2 Display
[4] DESCRIPTION OF FUNCTIONS
4-1 Power button:
button
Press the button to switch the power on and off.
4-2 Auto power OFF function
The instrument incorporates the auto power OFF function that turns the
instrument OFF in about 15 minutes after the last operation. This function can
be disabled by switching the instrument ON while holding the button. The
indicator on the display panel is extinguished when the auto power OFF
function is disabled.
4-3 Low battery indication
The
indicator lights on the display when the batteries have discharged
down to a supply voltage of about 2.3 V or less. Replace the batteries when
this indicator lights up.
4-4 Data hold function:
button
Press the
HOLD
button. The
indicator lights on the display and the value
displayed at that time is held and will not change even if the measurement
data varies. Pressing the button against extinguishes the
indicator and
the measurement data is no longer held.
4-5 Backlight function: button
Press this button to light the backlight of the display. Pressing the button again
extinguishes the backlight. The backlight is also extinguished automatically in
about 10 seconds after it is lit.
[5] MEASURING PROCEDURE
1. Do not apply an input voltage exceeding the maximum rated current.
2. During measurement, do not hold the measurement clip at any point beyond the barrier.
5-1 Start-up inspection
Perform the following pre-operational check for safety.
• Check the external appearance. Check that the main unit is free of abnormality
or damage due to dropping, etc.
• Check that the
indicator is not lit. If it is lit, replace the batteries with new ones.
• Make sure your hands and the instrument are not wet.
*If nothing is displayed on the LCD, the batteries might have been totally discharged.
5-2 Measuring the AC current (ACA measurement)
1. To improve the measuring accuracy, position the conductor at the center of
the clamp sensor.
2. Always clamp only one wire at a time. Accurate measurement is impossible if two
or more wires, a cable with multiple conductors or a parallel cord is clamped.
3. Accurate measurement is impossible if the clamp sensor is not closed completely.
4. Accurate measurement is sometimes impossible near a source of strong
magnetic field such as a transformer or high-current line, near a source of
electromagnetic waves such as radio equipment or near a charged object.
5. The CT may generate an oscillating sound when a high current is applied.
This is not malfunction.
①
Set the Power switch to ON.
②
Open the clamp sensor, catch the single wire to be measured and close the
clamp sensor completely.
③
Read the measurement value.
WARNING
CAUTION
Load
Load
Auto power OFF enabled
AC (Alternate current)
Low battery indication
Data HOLD
Unit (ampere)
Numeric value & decimal point
Clamping current sensor
(CT)
Center position indication
Barrier
HOLD button
LCD
Trigger
Power button
Backlight button
− 1 −
− 2 −
