1. Safety Warnings
This instrument has been designed, manufactured and
tested according to the following standards.
IEC 61010-1 Measurement CAT
Ⅲ
300V Pollution degree 2
IEC 61010-031
IEC 61326
This instruction manual contains warnings and safety
rules which must be observed by the user to ensure
safe operation of the instrument and retain it in safe
condition. Therefore, read through these operating
instructions before using the instrument.
#
WARNING
● Read through and understand instructions contained
in this manual before starting using the instrument.
● Save and keep the manual handy to enable quick
reference whenever necessary.
● This instrument should only be used by suitably
trained person and be sure to follow measurement
procedures described in the manual. Kyoritsu
assumes no responsibility for damage and injury
caused by misuse or not following instructions in the
manual.
● Be sure to understand and follow all safety
instructions contained in the manual.
Be sure to observe the above instructions.
Failure to follow the above instructions may cause
injury, instrument damage and/or damage to equipment
under test.
The symbol
#
indicated on the instrument means that
the user must refer to related parts in the manual for safe
operation of the instrument.
Be sure to carefully read the instructions following
#
each
symbol 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.
#
DANGER
● Never make measurement on the circuit in which electrical
potential to ground over 300V AC/DC exists.
● 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.
● Be sure to keep your fingers behind the Finger barrier
part of test lead.
● Never attempt to use the instrument if its surface or
your hand is wet.
● Do not open the instrument case when making
measurement.
#
WARNING
● Never attempt to make any measurement if any
abnormal conditions are noted, such as broken case,
cracked test leads and exposed metal parts.
● Do not turn the function selector switch with test
leads connected to the instrument.
● Do not install substitute parts or make any
modification to the instrument.
● Do not try to replace the batteries if the surface of the
instrument is wet.
● Make sure to disconnect test leads from the device
under test when opening the case for battery
replacement.
● Use of our Protective Cap offers different lengths of the
exposed metal part suitable for the test environments.
Please attach the Cap onto the metal part under CAT.
III or higher test environments.
#
CAUTION
● Always make sure to check Function switch is setting
to the appropriate range before starting measurement.
● Do not expose the instrument to the direct sun, high
temperature and humidity or dewfall.
● When the instrument will note be in use for a long
period, place it in storage after removing the batteries.
● Use a cloth dipped in water or neutral detergent for
cleaning the instrument. Do not use abrasives or solvents.
●The Cap should be firmly attached to the Probes.
Please refer to following explanation of the symbols
marked on the instrument or in the manual.
● Symbols
：
Ground
：
AC
：
DC
：AC and DC
Ω ：
Resistance
：
Diode
：Buzzer
：Capacitor
Hz ：
Frequency
：
Double or reinforced insulation
●
Measurement
CAT
Ⅱ
：
Primary electrical circuit of equipment with
power cord for connection to outlet.
CAT
Ⅲ
：
P r i m a r y e l e c t r i c a l c i r c u i t o f t h e
equipment, which is supplied power from
a distribution board, and cable run from a
distribution board to an outlet.
2. Features
This is a Digital Multi Meter providing most portability
by means of stowing the instrument body together with
probe in the notebook-size cover.
● Designed to international safety standards.
IEC 61010-1 Measurement CAT.
Ⅲ
300V
Pollution degree 2
IEC 61010-031 (probe assemblies)
● REL function to check the difference of measured
values
● Auto power off function to save battery consumption
● Data hold function
● Diode and Continuity check function
● Auto-ranging function
● Frequency measurement function
● DUTY measurement function
(Express Pulse width / Pulse period as a
percentage)
3. Specification
● Measuring ranges and accuracy
(23±5℃ , under the 45%〜75%RH)
DCV Function(5 Autoranging) :Input impedance approx. 10MΩ
Range
Measuring range
Accuracy
400mV
0〜600V
±0.8%rdg±5dgt
4V
40V
400V
600V
±1.0%rdg±5dgt
ACV Function(4 Autoranging): Input impedance approx. 10MΩ
Range
Measuring range
Accuracy
4V
0〜600V
±1.3%rdg±5dgt (50 / 60Hz)
±1.7%rdg±5dgt (〜400Hz)
40V
400V
±1.6%rdg±5dgt (50 / 60Hz)
±2.0%rdg±5dgt (〜400Hz)
600V
Resistance Function(6 Autoranging)
Range
Measuring range
Accuracy
400Ω
0〜40MΩ
±1.0%rdg±5dgt
4kΩ
40kΩ
400kΩ
4MΩ
40MΩ
±2.5%rdg±5dgt
Diode check/Continuity check Function
Function
Measuring range
Diode check
Test current approx. 0.4mA
Continuity check
Buzzer beeps below about 120Ω
Capacity Function (6 Autoranging)
Range
Measuring range
Accuracy
4nF
〜200uF
±5.5%rdg±10dgt
40nF
±3.5%rdg±10dgt
400nF
±3.5%rdg±5dgt
4uF
40uF
200uF
±4.5%rdg±5dgt
Frequency (4 Autoranging)/ DUTY Function
Range
Measuring range
Accuracy
10Hz
〜10kHz
Input sensitivity:
more than 1.5V(RMS)
±0.1%rdg±5dgt
100Hz
1000Hz
10kHz
DUTY
0.1〜99.9%
(Pulse width / Pulse period) ±2.5%rdg±5dgt
Note:
* At Voltage function, the Auto-ranging function is released
by pressing the SELECT key. To measure a voltage again,
turn the Function switch to the "OFF" position once. Then
set it to the Voltage function again.
● Standards :
IEC61010-1 Measurement CAT
Ⅲ
300V, pollution degree 2
IEC61010-031
capped condition for CAT.III 300V
uncapped condition for CAT.II 300V
IEC61326
● Method of operation :
△∑method
● Indication:
LCD maximum value 3999 (ACV, DCV, Ω, F)
units, symbols
● Over range display :
"OL" symbol is displayed on the LCD.
In case that the value is beyond effective measuring
range at the position of Ω function range and manual
range.
● Auto-ranging :
Range shifts to upper range when indicated value is
more than 3999. Range shifts to lower range when
indicated value is less than 360.
● Sampling rate :
approx. 400ms
● Operating Environmental conditions
−indoor use
−altitude up to 2000m
● Temperature & Humidity range(guaranteed accuracy):
23℃±5℃ Relative humidity: less than 75%
● Operating Temperature & Humidity range:
0℃〜+40℃ Relative humidity: less than 80%
● Storage Temperature & Humidity range:
-20℃〜+60℃ Relative humidity: less than 70%
● Insulation Resistance:
It should be more than 10MΩ/DC1000V between
electrical circuit and enclosures.
● Withstand Voltage :
It should be more than AC3700V/ for one minute
between electrical circuit and enclosures.
● Overload Protection :
Voltage function :
720V(RMS.) 10seconds
Resistance function : 250V(RMS.) 10seconds
Diode / Continuity : 250V(RMS.) 10seconds
Capacity function : 250V(RMS.) 10seconds
Frequency function : 250V(RMS.) 10seconds
● Dimensions :
approx. 107(L) x 54(W) x 10(D) mm
● Weight :
approx. 70g(including batteries)
● Power source :
Two LR44(SR44)1.5V or equivalent
● Accessories :
Two LR44 (SR44) batteries
Portable holder
Instruction manual
#
CAUTION
The voltage shown above is the overload protection
(overvoltage protection) for the instrument.
Make sure not to exceed the value of voltage shown
above.
4. Instrument Layout
① Function Selector Switch
④DATA HOLD Key
② Display
⑤Test Leads
③ SELECT Key
5. Preparation
5-1 Checking Battery Voltage
Set the Function Selector Switch to other positions
except the OFF position.
Battery Voltage is enough if indication is clear and
BT symbol is not indicated in this bout.
If BT symbol is indicated or no indication on the
display, follow to the Battery Replacement procedures
shown in item9 in this document and replace with new
batteries.
INSTRUCTION MANUAL
6. Measurements
6-1VoltageMeasurement(DCV,ACV)
#
DANGER
● To avoid the danger of getting electrical shock,
never make measurement on a circuit over 600V
AC/DC. (electrical potential to ground 300V AC/DC)
● Do not operate Function Selector Switch during
measurement.
● Do not make measurement when opening the
instrument case.
6-1-1 DC Voltage Measurement (DCV)
(1) Set the Function Selector Switch to " " position.
(Then, "AUTO"," "and"mV" symbols are indicated
on the display.)
(2) Connect the black test lead to the negative side of
the circuit under the test and the red test lead to the
positive side of the circuit, then the measured value
is indicated on the display. If you connect the test
leads the other way, "-" symbol is indicated on the
display.
6-1-2 AC Voltage Measurement (ACV)
(1) Set the Function Selector Switch to " " position.
(Then, "AUTO", "
", and "V" symbols are indicated
on the display.)
(2) Connect the test leads to the circuit under test.
Measured value is indicated on the display.
Note) Even if short-circuit the input line at the range of
AC4V, 2〜5dgt may remain indicated.
6-2ResistanceMeasurement
#
DANGER
● To avoid the danger of getting electrical shock,
never make measurement of the circuit in which
electric potential exists.
● Do not make measurement when opening the
instrument case.
(1) Set the Function Selector Switch to "Ω" position.
(Then, "AUTO" and "MΩ" symbols are indicated
on the display.) Make sure that the "OL" symbol
is indicated on the display at this bout, then short
the test lead tips and check "0" is indicated on the
display.
(2) Connect the test leads to both ends of the resistance
under test.
Measured value is indicated on the display.
Note) Even if short the test lead tips, indicated value may
not be "0". But this is because of the resistance of
test leads and not a failure.
6-3ContinuityCheck/DiodeCheck
#
DANGER
● To avoid the danger of getting electrical shock,
never make measurement of the circuit in which
electric potential exists.
● Do not make measurement when opening the
instrument case.
6-3-1 Continuity Check
(1) Set the Function Selector Switch to "
/ " position.
(Then, " " and Ω symbols are indicated on the
display.)
(2) Make sure that the "OL" symbol is indicated on the
display at this bout, then short the test lead tips and
check "0" is indicated on the display and check if the
buzzer beeps.
(3) Connect the test leads to both ends of the resistance
under test.
Measured value is indicated on the display. The
buzzer beeps below about 120Ω.
Note) Even if short the test lead tips, indicated value may
not be "0". But this is because of the resistance of
test leads and not a failure.
6-3-2 Diode Check
(1) Set the Function Selector Switch to "
/ " position.
(Then, " " and "Ω" symbols are indicated on the
display.)
(2) Press the SELECT Key twice and set the instrument
to Diode Check mode. (Then, "
" and "V" symbols
are indicated on the display.) Make sure that the
"OL" symbol is indicated on the display at this
bout, then short the test lead tips and check "0" is
indicated on the display.
(3) Connect the black test lead to the cathode side of
the Diode and the red test lead to the anode side of
the Diode.
Forward voltage of Diode is indicated on the display.
(4) Connect the black test lead to the anode side of the
Diode and the red test lead to the cathode side of
the Diode.Normally, "OL" symbol is indicated on the
display.
Conclusion : Diode is OK if the instrument complies with
above items(3) and (4).
Note) Open-circuit voltage between measuring terminals is
approx.1.5V.(measuring current approx. 0.4mA)
6-4CapacitanceMeasurement
#
DANGER
● To avoid the danger of getting electrical shock,
never make measurement of the circuit in which
electric potential exists.
● Do not make measurement when opening the
instrument case.
● Make sure to discharge the capacitor before making
measurement.
(1) Set the Function Selector Switch to " " position.
(Then, "AUTO" and "nF" symbols are indicated on
the display.)
(2) Press the SELECT key and "0" shall be indicated.
(Then, "△" symbol is indicated on the display.)
(3) Connect the test leads to both ends of the resistance
under test.
Measured value is indicated on the display.
Measuring unit "nF" / "uF" is automatically chosen
and indicated due to the measured value.
Note) It may take some time according to the measuring
capacitance.
Measuring capacitance < 4uF Measuring time is
about 2seconds
Measuring capacitance < 40uF Measuring time is
about 7seconds
Measuring capacitance < 100uF Measuring time is
about 15seconds
6-5FrequencyMeasurement
#
DANGER
● To avoid the danger of getting electrical shocks,
never make measurement on a circuit over 300V
AC/DC. (electrical potential to ground 300V AC/DC)
● Do not operate Function Selector Switch during
measurement.
● Do not make measurement when opening the
instrument case.
Frequency can be measured at ACV functions by
pressing "Hz/DUTY" Switch. Concerning with the
direction for use of "Hz/ DUTY" Switch, please
reference to the item7-1 Hz/DUTY in this document.
Note) The minimum input can be measured is approx. 1.5V.
To measure a frequency, measure the voltage on the
electrical circuit in advance. Then press the "Hz/
DUTY" Key to enter into frequency measurement.
Readings of frequency may fluctuate or be
influenced under noisy environment.
7. How to use Function Switches
7-1SELECT,Hz/DUTYKey
At each function, the actions of SELECT, Hz/DUTY key
are different so please refer to following items and make
active use of them.
● ACV function
(Above two keys act as Hz/DUTY switch key.)
Capable of selecting the Voltage, Frequency or
DUTY measurement mode.
At the initial condition, Voltage measurement has
been selected for the ACV function.
By pressing "Hz/DUTY" key, measuring mode
changes.
"Voltage" → "Frequency" → "DUTY"
● *At Voltage function, the Auto-ranging function is
released by pressing the SELECT key. To measure a
voltage again, turn the Function switch to the "OFF"
position once. Then set it to the Voltage function again.
● DCV, Ω and Capacitance measurement
(Above two keys act as REL△ key.)
Indicate the difference between measured values.
When any function ("DCV", "Ω" and "Capacitance")
selected, the measured value can be stored by
pressing SELECT key and after that, the difference
between stored value and measuring value is
indicated on the display
(△mark is keep lighting on the display while a value
is stored)
The stored value can be released by pressing
"SELECT" key again.
"Release" → "Memory"
● Continuity check /Diode check function
(Change between Continuity check and Diode check)
At the initial condition, "Continuity check" mode has
been selected for the Continuity check / Diode check
function.
By pressing "SELECT" key, measuring mode
changes.
"Continuity check" → "Diode check"
The relative measurement is allowed in the following
range.
* Measuring range = Full scale value at a range −
initial value
7-2DATAHOLDKey
The measured value can be hold at all functions.
By pressing "DATA HOLD" key, "DH" symbol indicated
on the display and the indicated value can be held.
By pressing "DATA HOLD" key again, "DH" symbol
disappears from the display and held data is released.
8. Auto Power Off
Auto power off function operates when about 15minutes
passed after power on this instrument. When Auto
power off function operates and the instrument powered
off, the power-off statue returns to normal by pressing
any key.
9. Battery Replacement
#
DANGER
● Never open the instrument case when making
measurement.
● To avoid getting electrical shock, be sure to remove
test leads from the instrument when opening the
instrument case in order to replace batteries.
(1) Remove the Portable holder from the instrument.
(2) Loosen one screw on the bottom of the instrument
and open the battery cover, then replace batteries.
Battery : Two LR44(SR44)1.5V or equivalent
10. Maintenance
Use a cloth dipped in water or neutral detergent for
cleaning the instrument. Do not use abrasives or
solvents.
DISTRIBUTOR
Kyoritsu reserves the rights to change specifications
or Designs described in this manual without notice
and without obligations.
CARD TYPE AUTO RANGE DIGITAL MULTIMETER
KEW 1018
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