KYORITSU KEW1021R Instruction Manual

INSTRUCTION MANUAL
DIGITAL MULTIMETER
KEW1021R
LCD
HOLD / Back light Key
SELECT Key
REL / MAX･MIN Key
Function Switch
Voltage Terminal
Current Terminal
COM Terminal
Cap Barrier

1. Safety Warnings

This instrument has been designed, manufactured and tested
according to IEC 61010: Safety requirements for electrical equipment,
and delivered in the best condition after passing quality control tests.
This instruction manual contains warnings and safety rules which have
to be observed by the user to ensure safe operation of the instrument
and to maintain it in safe condition. Therefore, read through these
operating instructions before using the instrument.
WARNING
● Read through and understand the instructions contained in this
manual before using the instrument.
● Keep the manual at hand to enable quick reference whenever
necessary.
● The instrument is to be used only in its intended applications.
● Understand and follow all the safety instructions contained in the
manual.
● It is essential that the above instructions are adhered to. Failure
to follow the above instructions may impair the protection
provided by the instrument and test leads, and may cause injury,
instrument damage and/or damage to equipment under test.

3. Other Functions

● REL Function
Press the REL key to enable this function and store the measured
value to display the differences between the stored value and the
values measured in further tests. The measurement range will be
fixed when the REL function is enabled, and the measuring range will
be between the initial value and the full scale value.
Press the REL Key again to release the stored value.
"Δ" appears and "AUTO" disappears
when REL Key is pressed.
One press: REL ON
Another press: REL OFF
*To activate REL function, MAX/MIN function should be disabled.
● Max / Min value display function
This function is to display the measured max and min values on the
LCD during a measurement. Press the MAX/MIN key 1 sec or longer
to start recoding of max and min values. Then the LCD shows the
latest max value. After that, the min and present values can be
toggled and checked by pressing the MAX/MIN key (less than 1
sec).
To disable this function, press the MAX/MIN key 1 sec or longer.
Max value Min value Present value
Less than 1 sec Less than 1 sec
Less than 1 sec
* To activate MAX/MIN function, REL function should be disabled.
● Data hold function
Press the HOLD key (less than 1 sec). The LCD shows "H" mark and
the reading will be held (Data hold mode). The max/ min values are
not updated in MAX/MIN mode. Press the HOLD key
again (less than 1 sec) to release the display.
● Backlight function
Press the Backlight key 1 sec or longer to turn
on the backlight. Press the Backlight key another 1 sec or longer to
turn it off. The light automatically turns off in 1 min.
● Low battery indication
The LCD shows " " mark when the batteries fall below the
normal operating voltage.
Replace the batteries with
new ones when this mark
appears.
● Sleep Function
Automatically powers off the instrument in about 15 min after the last
switch operation.
To exit from the Sleep mode, rotate the Function switch or press any
key. To disable the Sleep function, press the HOLD/Backlight key
and power on the instrument.
Confirm that the LCD shows "P.OFF" about 1 sec.
●How to store test leads
Attach the Wing-type holder to the back of the instrument to store the
test leads.
1. Attach the Wing-type holder to the back of the instrument.
2. Fit the barrier on the test lead into the groove between the
instrument and the Wing-type holder.
Flat-type
Wing-type
1. 3.
holder 2.
holder
3. Then it will be easier to see the displayed readings during a
measurement.
The symbol indicated on the instrument means that the user
must refer to the related parts in the manual for safe operation of the
instrument. It is essential to read the instructions wherever the
symbol appears in the manual.
DANGER is reserved for conditions and actions that
are likely to cause serious or fatal injury.
WARNING is reserved for conditions and actions that
can cause serious or fatal injury.
CAUTION is reserved for conditions and actions that
can cause injury or instrument damage.
● Symbols listed below are used on this instrument.
User must refer to the manual.
Instrument with double or reinforced insulation.
AC DC Ground (Earth)
This instrument complies to WEEE Directive (2002/96/EC).
Please contact your local distributor at disposal.
Measurement Category
O
Circuits which are not directly connected to the mains power supply.
CAT II
Primary electrical circuits of equipment connected to an AC
electrical outlet by a power cord.
CAT III
Primary electrical circuits of the equipment connected directly
to the distribution panel, and feeders from the distribution
panel to outlets.
CAT IV
The circuit from the service drop to the service entrance, and
to the power meter and primary over current protection
device(distribution panel).
This instrument is designed for CAT IV 300V/ CAT III 600V. Test
leads M-7066A with the supplied caps are designed for CAT
IV600V/ CAT III 1000V and without the caps are for CAT II 1000V.
DANGER
● Never make measurements under the circumstances exceeding the
designed measurement category and the rated voltage of the
instrument.
● Do not attempt to make measurement in the presence of flammable
gasses. Otherwise, the use of the instrument may cause sparking,
which can lead to an explosion.
● Never attempt to use the instrument if its surface or your hand is wet.
● Do not exceed the maximum allowable input of any measuring
range.
● Never open the Battery compartment cover during a measurement.
● To avoid electrical shock by touching the equipment under test or its
surroundings, be sure to wear insulated protective gear.
● Test leads to be used for voltage measurements shall be rated as
appropriate for Measurement Category III or IV according to IEC
61010-031 and shall have a voltage rating of 600V or higher.
● Barriers on the test leads provide protection to keep your fingers and
hands from touching an object under test. Keep your fingers and
hands behind the barriers during measurement.
WARNING
● Never attempt to make measurement if any abnormal conditions,
such as broken case and exposed metal parts are found on the
instrument or test leads.
● Verify proper operation on a known source before use or take action
as a result of the indication of the instrument.
● Firmly attach the caps to the test leads when performing
measurements in CAT III or higher test environments. When
KEW1021R and the test leads are combined and used together,
whichever is lower category & voltage to earth either of them
belong to is applied.
● Do not rotate the Function Switch if the instrument and the
equipment under test are connected.
● Do not install substitute parts or make any modification to the
instrument. For repair or re-calibration, return the instrument to your
local KYORITSU distributor.
● Other convenient functions
Magnet hanger strap
(option)
Tilt stand

4. ACV / DCV / ACmV / DCmV Measurement

DANGER
● Before starting a measurement, always check and confirm
the Function switch is in the appropriate measurement
position and the test leads are connected to the proper input
terminals.
● Never make measurement on a circuit in which voltage over
600V exists.
● Keep your fingers and hands behind the barrier during
measurement.

4.1 ACV / DCV/ ACmV / DCmV measurement

(1) Set the Function switch to ACV, DCV, ACmV or DCmV position.
For frequency or DUTY measurement, set the switch to ACV
and press the SELECT key.
Default : ACV
DUTY Frequency
Press the SELECT key to toggle functions
(2) Connect the test leads to the Voltage and COM terminals.
ACV / ACmV DCV / DCmV
Black

4.2 Clamp sensor (option) measurement

(1) Set the Function switch to ACmV or DCmV position and press the
SELECT key. LCD shows "SENSOR".
Sensor mode
Default :ACmV
Sensor mode
Default :DCmV
Press the SELECT key to toggle functions
(2) Connect the clamp sensor to the Voltage and COM terminals.
DC clamp sensor
AC clamp sensor
Black
Red
NOTE
● If the connection is reversed, the " － " mark will be displayed on the
LCD. (DCV measurement).
● Press the REL key to adjust the reading on the DC clamp sensor to
"0".
● The sensor mode corresponds to direct reading with 10mV/A
output clamp sensor.
CAUTION
● Use of this instrument is limited to domestic, commercial and light
industry applications. Strong electromagnetic interference or strong
magnetic fields, generated by large currents, may cause malfunction
of the instrument.
● Firmly insert the test leads.
● Do not pull or twist the test leads to prevent the risk of damage.
● Power off the instrument after use. Remove the battery if the
instrument is to be stored and will not be in use for a long period.
● Do not expose the instrument to direct sunlight, high temperature
and humidity or dewfall.
● Use a cloth dipped in water or neutral detergent for cleaning the
instrument. Do not use abrasives or solvents.
NOTE
● The LCD shows some digits at the Voltage or the Current range even
while the test leads are open. And, it may show some digits instead
of 0 even if the test leads are shorted. However, these phenomena
don't affect measurement results.
● A resistance measurement takes time to settle the reading if there is
a high resistance or capacitance components.

2. Specification

● Accuracy (Temperature: 23 ± 5°C, Humidity: 45 - 75%)
/
ACV RMS
Range Display Range
6V 0.000, 0.006 - 6.299V
60V 5.70 - 62.99V
600V 57.0 - 629.9V
Guaranteed accuracy : 0.01V-600V, less than 900V peak
Input impedance : approx. 10MΩ
Hz Frequency -
ACV measurement
Range Display Range
99.99Hz 10.00 - 99.99Hz
999.9Hz 95.0 - 999.9Hz
9.999kHz 0.950 - 9.999kHz
99.99kHz 95.0 - 99.99kHz
Guaranteed accuracy : 10Hz-99kHz
% DUTY -
ACV measurement
Range Display Range
99.9 % 0.0 – 99.9 %
Guaranteed accuracy : 10%-90%
DCV
Range Display Range
6.000V 0.000 - ±6.299V
60.00V ±5.70 - ±62.99V
600.0V ±57.0 - ±629.9V
Guaranteed accuracy : 0V-±600V
Input impedance : approx. 11MΩ(6V range) / 10MΩ(60/600V range)
ACmV / RMS
Range Display Range
600.0mV 0.0, 0.9 - 629.9mV
Guaranteed accuracy : 1.2mV-600mV, less than 900mV peak
Input impedance : approx. 900kΩ
AC Clamp Sensor / RMS
Range Display Range
60.00A 0.00, 0.09 - 62.99A
+ Sensor accuracy (40-500Hz)
200.0A 57.0 - 209.9A
Direct reading from 10mV / A output Clamp sensor
Guaranteed accuracy : 0.12A-200A, less than 300A peak
Input impedance : approx. 900kΩ
DCmV
Range Display Range
600.0mV 0.0 - ±629.9mV
Guaranteed accuracy : 0mV-±600mV, Input impedance : approx. 900kΩ
DC Clamp Sensor
Range Display Range
60.00A 0.00 - ±62.99A
200.0A ±57.0 - ±209.9A
Direct reading from 10mV / A output Clamp sensor
Guaranteed accuracy : 0A-±200A, Input impedance : approx. 900kΩ
5. Resistance / Diode / Continuity / Capacitance
Measurement
WARNING
Never use the instrument on an energized circuit. Discharge the
capacitor before starting a capacitance measurement.
(1) Set the Function switch to the resistance position. For continuity
check or diode/ capacitance measurement, press the SELECT key.
Default:Resistance
Capacitance
Continuity
Press the SELECT key to toggle functions
(2) Connect the test leads to the Voltage and COM terminals.
Resistance
or Capacitance Continuity
NOTE
● LCD shows "OL" when the test leads are open.
(except for capacitance measurement)
● The LCD shows "OL" if the test lead connection is reversed for diode
measurement.
● Measurement time on 600μF/1000μF range is a bit long.
(20sec max.)

6. ACA / DCA Measurement

WARNING
● The value for the maximum input current on ACA and DCA
ranges is 10A (protected by fuse). Do not apply current that
Red
exceeds 10A.
● If measuring a current of 6A or higher, the duration of
measurement should be within 2 min. After that, a rest
period of 10 min is required.
(1) Set the Function switch to ACA or DCA position. For frequency/
DUTY measurement, press the SELECT key while the Function
switch is in ACA position.
(ACA)
Default : ACA
(DCA)
DUTY
Press the SELECT key to toggle functions
(2) Connect the test leads to the Current and COM terminals.
Red
NOTE
● If the connection is reversed, the " － " mark will be displayed on the
LCD. (DCA measurement).
● If the fuse is blown, please refer to 7. Fuse Replacement and replace
it with a new one.
Resistance
Range Display Range
600.0Ω 0.0 - 629.9Ω
6.000kΩ 0.570 - 6.299kΩ
60.00kΩ 5.70 - 62.99kΩ
600.0kΩ 57.0 - 629.9kΩ
6.000MΩ 0.570 - 6.299MΩ
40.00MΩ 5.70 - 41.99MΩ
Guaranteed accuracy : 0Ω-40MΩ, Open-loop Voltage : less than 3V
Measurement current : less than 1mA
Continuity
Range Display Range
600.0Ω 0.0 - 629.9Ω
Open-loop Voltage : less than 3V, Measurement current : less than 1mA
Diode
Range Display Range
2.000V 0.000 - 2.099V
Guaranteed accuracy : 0V-2V, Open-loop Voltage : less than 3V
Measurement current : approx.0.5mA (Vf=0.6V)
Capacitance
Range Display Range
60.00nF 0.00 - 62.99nF
600.0nF 57.0 - 629.9nF
6.000µF 0.570 - 6.299µF
(Auto Range)
60.00µF 5.70 - 62.99µF
Accuracy (sine wave)
600.0µF 57.0 - 629.9µF
±1.0 %rdg±3dgt
1000µF 570 - 1049µF
(40-500Hz)
* Accuracy after canceling floating capacitance using REL function.
Guaranteed accuracy : 0nF-1000µF
ACA / RMS
Range Display Range
(Auto Range)
6.000A 0.000, 0.006 - 6.299A
Accuracy
10.00A 5.70 - 10.49A
(sine wave)
Guaranteed accuracy : 0.01A - 10A, less than 15Apeak
Hz Frequency -
ACA measurement
±0.1%rdg±3dgt
Range Display Range
99.99Hz 10.00 - 99.99Hz
999.9Hz 95.0 - 999.9Hz
9.999kHz 0.950 - 9.999kHz
Guaranteed accuracy : 10Hz-9.9kHz
Accuracy
% DUTY -
ACA measurement
(Square wave)
Range Display Range
±1.0%rdg±3dgt
99.9 % 0.0 – 99.9 %
(50/60Hz)
Guaranteed accuracy : 10%-90% (Square wave)
DCA
(Auto Range)
Range Display Range
Accuracy
6.000A 0.000 - ±6.299A
10.00A ±5.70 - ±10.49A
±0.5 %rdg±3dgt
Guaranteed accuracy : 0A-±10A
●Measuring method : ⊿Σ modulation
●Over-range indication : OL
●Measurement cycle : 2.5 times per second
(1000µF range of Capacitance function 0.05 times per second)
Accuracy (sine wave)
●Crest factor : less than 3 (45-65Hz)
±2.0 %rdg±3dgt
For non-sinusoidal waveforms, add ±0.5 %rdg±5dgt
(40-500Hz)
(Applicable functions : ACV, ACmV, AC clamp sensor, ACA)
●Applicable standards :
IEC 61010-1 /61010-2-033 : CAT IV 300V / CAT III 600V
Pollution degree 2, Indoor use, Altitude up to 2000m
(Auto Range)
IEC61010-31 (Test leads Model 7066A)
Accuracy (sine wave)
IEC 61326 (EMC) , EN 50581 (RoHS)
±2.0 %rdg±3dgt
●Withstand voltage : AC5160Vrms 5sec between circuit and enclosure
●IP rating : IP40 (IEC60529)
●Insulation resistance : 100MΩ or more /1000V between enclosure
and electrical circuit
●Operating temperature and humidity range :
●Storage Temperature and humidity range :
Accuracy
●Power source : DC3V R03/LR03 (AAA) × 2
±1.5 %rdg±3dgt
●Current consumption : 3mA or less
●Battery life : Approx. 200 hours (ACV, continuous, no load, with R03)
●Dimension, Weight : 155(L)×75(W)×40(D)mm,
(Auto Range)
approx. 250g (including batteries and Wing-type holder)
Accuracy
●Accessories : Test leads (M-7066A), soft case(M-9097)
±1.5 %rdg±3dgt
Instruction manual, 10A/600V Fuse (M-8919, included)
+ Sensor accuracy
Battery R03 (AAA) 2pcs Flat-type holder, Wing-type holder
●Option : Magnet hanger strap (M-9189)
Test leads with alligator clips (M-7234)
AC Clamp Sensor (KEW8161), AC/DC Clamp Sensor (KEW8115)

7. Battery / Fuse Replacement

● Replace the battery when the "
warning- appears on the LCD.
Otherwise, precise measurement cannot be made. If the battery
is completely exhausted, the LCD goes blank without showing
the " " mark.
● Disconnect the test leads from the object under test and power
off the instrument before opening the Battery compartment
cover for battery or fuse replacement.
● The fuse gets hot after current measurement and may cause
burn injury. If replacing the batteries or fuse after current
Diode
measurement, a rest period of 10 min before you do.
● Use the designated fuse only.
● Do not try to replace the battery or fuse if the surface of the
instrument is wet.
● Do not mix old and new batteries.
● Install a batteries in correct polarity as indicated in the
Diode
Battery Compartment.
(1) Set the Function Switch to "OFF" position.
(2) Untighten the screw on the back of the instrument.
(3) Remove the Battery compartment cover and replace the
batteries or fuse.
Black Red
(4) Attach the cover to the instrument and then secure the cover
♪
by tightening the screw.
Battery
Fuse
(10A/600V, size : 6.3 × 32mm, Fast Acting type)
Frequency
Kyoritsu reserves the rights to change specifications or designs
described in this manual without notice and without obligations.
Black
9-15
(Auto Range)
Accuracy
±0.5 %rdg±4dgt
±0.5 %rdg±2dgt
±1.5 %rdg±3dgt
Accuracy
Buzzer threshold value :
less than 90Ω
Accuracy
±5 %rdg±5dgt
(Auto Range)
Accuracy
±2.0 %rdg±5dgt*
±5.0 %rdg±5dgt
(Auto Range)
Accuracy (sine wave)
±1.5 %rdg±3dgt
(40-500Hz)
(Auto Range)
Accuracy
±0.1 %rdg±3dgt
Accuracy
±1.0%rdg±3dgt (50/60Hz)
(Auto Range)
Accuracy (sine wave)
±1.5 %rdg±3dgt
0 to 40°C, 80%RH or less (no condensation)
-20 to 60°C, 80%RH or less (no condensation)
WARNING
" mark- low battery voltage
CAUTION
Screw
92-2238B