KYORITSU KEW 1052 User manual
INSTRUCTION MANUAL
DIGITAL MULTIMETER
KEW 1051
／
1052
1
Thank you for purchasing our Model KEW1051, KEW1052 Digital Multimeter.
This instruction manual describes the specications and handling precaution for this Digital
Multimeter.
Before using this Digital Multimeter, thoroughly read this manual to get a clear understanding
on proper use.
Always observe the following instructions.
Failure to do so may impair the protection provided by the instrument and probes, and may
result in electrical shock or other dangers that may lead to serious injury or the loss of life.
KYORITSU is in no way liable for any damage resulting from the user’s mishandling of the
product.
For safe use of this product, the following safety symbols are used on the product:
nAbout This Manual
• Every effort has been made to ensure accuracy in the preparation of this manual.
However, should any errors or omissions come to the attention of the user, please contact
KYORITSU.
• The contents of this manual are subject to change without prior notice because of
improvement in performance or function.
• All rights reserved. No part of this manual may be reproduced in any from without
KYORITSU's written permission.
2
Regarding Safe Use of This Product
For safe use of this product, the following safety symbols are used on the product and manual:
WARNING
This indicates that the operator must refer to an explanation in the
instruction manual in order to avoid the risk of serious injury or
the loss of life.
CAUTION
This indicates that the operator must refer to an explanation in the
instruction manual in order to avoid the risk of injury or damage to
the product.
Note This indicates information that is essential for handling the instrument
or should be noted in order to familiarize yourself with the
instrument’s operating procedures and/or functions.
Danger! Handle with Care
This symbol indicates that the operator must refer to an
explanation in the instruction manual in order to avoid risk of
injury or death of personnel or damage to the instrument.
Double Insulation
This symbol indicates double insulation or reinforced insulation.
Direct Current
This symbol indicates DC voltage/current.
Alternating Current
This symbol indicates AC voltage/current.
DC/AC
This symbol indicates AC and DC.
Fuse
This symbol indicates a fuse.
Battery
This symbol indicates a battery.
Ground
This symbol indicates ground (earth).
3
WARNING
nAlways observe the following instructions. Failure to do so may result in
electrical shock or other dangers that may lead to serious injury or the loss of
life.
Test leads / Test leads with crocodile clip (optional accessory)
• Use the probes supplied by KYORITSU with this instrument.
• Do not use test leads/test leads with crocodile clip that have deteriorated or are defective.
Check test leads/test leads with crocodile clip continuity.
• Disconnect test leads/test leads with crocodile clip from the circuit under test before opening
the casing to replace the batteries or for any other reason.
• Disconnect test leads/test leads with crocodile clip from the circuit under test before
attaching/detaching the test leads/test leads with crocodile clip to/from the instrument.
• Disconnect test leads/test leads with crocodile clip from the instrument before opening the
casing to replace the batteries or for any other reason.
• A cap is provided on the tip of a test lead.
Use a test lead with the cap on for safety (safety standards: IEC 61010-031).
• Do not use the crocodile clip of test leads being loosen or removed conditions.
Casing
• Do not use the instrument if there is any damage to the casing or when the casing is
removed.
Fuses
• Use fuses of the specied rating when the fuse is replaced.
Operating Environment
• Do not operate the instrument in an atmosphere where any ammable or explosive gas is
present.
• Avoid using the instrument if it has been exposed to rain or moisture or if your hands are
wet.
Disassembly
• No person, except personnel from KYORITSU, is authorized to disassemble this instrument.
4
Contents
1. Overview.............................................................................................................5
2. Measurement Category.......................................................................................6
3. Specications ......................................................................................................7
3.1 General Specications ..............................................................................7
3.2 Accuracy...................................................................................................9
4. Operation ..........................................................................................................12
4.1 Precautions Before Measurement...........................................................12
4.2 Components ............................................................................................ 13
4.3 Measuring Instructions............................................................................17
4.3.1 AC Voltage Measurement................................................................ 17
4.3.2 DC Voltage Measurement................................................................ 17
4.3.3 Measurements with SENSOR..........................................................18
4.3.4 Resistance Measurement..................................................................18
4.3.5 Continuity Check............................................................................. 19
4.3.6 Diode Test........................................................................................19
4.3.7 Temperature Measurement...............................................................20
4.3.8 Current Measurement ...................................................................... 21
4.3.9 Capacitor Measurement................................................................... 22
4.3.10 Frequency Measurement.................................................................22
4.3.11
Function to change RMS detection to/from MEAN detection
mode (KEW1052 only).........................................................................23
4.3.12 Function to turn the lter on/off...................................................... 23
4.3.13 AUTO HOLD Function...................................................................24
4.3.14 Relative and percentage calculation................................................24
4.3.15 MIN/MAX/AVG Function (KEW1052 only) .................................25
4.4 Memory Function (KEW1052 only)....................................................... 26
4.5 AUTO POWER OFF Function...............................................................27
4.6 Set-up Function.......................................................................................28
4.7 Additional functions simply set when POWER ON...............................32
4.8 LCD Check ............................................................................................. 32
5. User Calibration Function.................................................................................33
6. Battery and Fuse Replacement .........................................................................35
6.1 Battery Replacement...............................................................................35
6.2 Fuse Replacement...................................................................................36
7. Calibration and Maintenance............................................................................37
8 Disposing the Product....................................................................................... 37
5
1. Overview
lDisplay
4-digit (LCD)
Maximum Reading: 6000
Bar graph indicator
lSupports a variety of measurement function
Measurement function
DC Voltage, AC Voltage, DC Current, AC Current, Resistance, Frequency, Temperature,
Capacitor, Continuity Check, Diode Test
Other functions
Data Hold (D•H), Auto Hold (A•H), Range Hold (R•H),
Maximum value* (MAX), Minimum value* (MIN), Average value* (AVG),
Zero Adjustment (Capacitor, Resistance), Relative values, Save to Memory*,
LCD backlight.
*: For model KEW1052 only
lSwitching detection modes
Effective value (root mean square value) detection (RMS) and mean value detection (MEAN)
can be switched during AC voltage measurement (KEW1052 only).
l Low-passlter
The low-pass lter can be switched on/off during AC voltage or AC current measurement.
lCommunication: optional communication set is required (KEW1052 only).
• Measurement data can be transferred to a PC using an optional USB communication
package.
The data can be read by certain applications to make trend graphs or can be converted
into Excel les.
• The data can also be output from an optional printer via an optional printer communication
set.
lSafety design
Complied standards: CE standards
Uses a current-input terminal shutter for preventing wrong input.
Uses high-performance UL-standard fuses.
6
2. Measurement Category
WARNING
nMeasurement Category (CAT.)
The restrictions on the maximum voltage level for which the KEW1051, KEW1052 can
be used, depend on the measurement categories specied by the safety standards.
Do not apply any input level higher than maximum allowable input.
AC/DC 1000V CAT.III
AC/DC 600V CAT.IV
Measurement
category Description Remarks
ⅠCAT. I For measurements performed on circuits not
directly connected to MAINS.
ⅡCAT. II For measurements performed on circuits directly
connected to the low voltage installation. Appliances, portable
equipment, ect.
ⅢCAT.III For measurements performed in the building
installation. Distribution board,
circuit breaker, ect.
ⅣCAT. ⅣFor measurements performed all the source of the
low-voltage installation. Overhead wire,
cable systems, ect.
Internal Wiring
Outlet
Entrance
Cable
Fixed Equipment,
etc.
Distribution
Board
CAT.II
Equipment
CAT.I
CAT.IV
CAT.III
Note
Radiation immunity affects the accuracy of the KEW1051, KEW1052 under the
conditions specied in IEC61326-1.
Use of this instrument is limited to domestic, commercial, and light industry
applications. If equipment generating strong electromagnetic interference is located
nearly, the instrument may malfunction.
7
3. Specications
3.1 GeneralSpecications
Measurement function:
DC Voltage, AC Voltage, DC Current, AC Current, Resistance,
Frequency, Temperature, Capacitor, Continuity Check, Diode Test
Other functions: Data Hold (D•H), Auto Hold (A•H), Range Hold (R•H), Maximum
value* (MAX), Minimum value* (MIN), Average value* (AVG),
Zero Adjustment (Capacitor, Resistance), Relative values, Save to
Memory*, LCD backlight.
*: For model KEW1052 only
Measuring method: Σ modulation
Display: 4-digit (LCD)/7-segment
Maximum Reading: 6000
Polarity Indicator: “–” Appears automatically when the polarity is
negative
Overrange Indicator: “ OL ”
Low-battery Indicator: “ ” Appears when the batteries become
low
Measurement cycle: 5 times per second
(except frequency measurement : one time per second, Resistance
measurement (6MΩ/60MΩ) : 2.5 times per second, capacitor
measurement (1000μF) : max.0.14 time per second)
Bar graph display approx 25 times per second (at AC, Ω)
Operating temperature and humidity ranges:
-10 to 55ºC, 80%RH or less (no condensation)
70%RH or less at 40 to 55ºC.
Storage temperature and humidity ranges:
-30 to 70ºC, 70%RH or less (no condensation)
Temperature coefcient:
(Accuracy at 23±5ºC× 0.1)/ºC should be added.
(Temperature ranges: -10 to 18ºC and 28 to 55ºC)
Power supply: AA-size (R6/LR6) 1.5V batteries: 4
Battery life: Approximately 300 hours
(Operating hours of alkaline batteries when in DC voltage-mode.)
Note: The battery life varies depending on the operating conditions.
Insulation resistance : 1000V DC, 100MΩ or more
8
Withstand voltage: 6.88kVrms AC for ve seconds
(across input terminals and casing)
External dimensions: Approximately 192(L)×90(W)×49(D)mm
Weight: Approximately 560g (including batteries)
Complied standards: Safety standards
IEC61010-1, IEC61010-031
CAT.III (Max. input voltage: AC/DC1000V)
CAT.IV (Max. input voltage:AC/DC600V)
Pollution degree 2, indoor use,
2000m max. above sea level
EMC standards
IEC61326-1 Class B
Effect of radiation immunity:
In the radio-frequency electromagnetic eld of 3 V/m, accuracy is
within ve times the rated accuracy.
Standard accessories: Batteries : 4
Test leads: 1set (M-7220)
Fuse (included): 440mA/1000V (M-8926), 10A/1000V (M-8927)
Instruction manual: 1
Blank cover: 1
Optional accessories: Carrying case M-9150
(for the main unit with test leads and
communication cable)
Test leads (1set) M-7220
Test leads with crocodile clip (1 set)
M-7234
Fuse
440mA/1000V M-8926
10A/1000V M-8927
Temperature probes M-8405, 8406, 8407, 8408
Followings are for KEW1052 only.
USB Communication set M-8241 (Software, USB adapter and
cable)
Printer communication set M-8243 (Printer Adapter and Cable)
Printer M-8246
AC adapter (for printer, Europe)
M-8248
Thermal paper for printer (10 rolls)
M-8247
9
3.2 Accuracy
Test conditions:
Temperature and humidity: 23±5ºC at 80%RH or less
Accuracy: ±(% of reading + digits)
Note: Each response time is a value to rated accuracy within selected range.
DC Voltage Measurement V
Range Resolution Accuracy Input Resistance Maximum
Input Voltage
600mV 0.1mV
0.09+2
10MΩ 1000V
DC
1000V
rms AC
6V 0.001V 11MΩ
60V 0.01V
10MΩ600V 0.1V
1000V 1V 0.15+2
NMRR: 60dB or more 50/60Hz±0.1%
CMRR: 120dB or more 50/60Hz (Rs=1kΩ)
Response time:1 sec max.
AC Voltage Measurement V
AC Coupling: RMS value detection, sine wave
MEAN value detection and RMS value calibration (KEW1052 only)
Range
Resolution
Accuracy Input
Impedance
Maximum
Input
Voltage
50/60Hz 40Hz to 500Hz 500Hz to 1kHz
600mV 0.1mV
0.5+5 1+5 1.5+5
10MΩ, <200pF 1000V
rms AC
1000V
DC
6V 0.001V 11MΩ, <50pF
60V 0.01V
10MΩ, <50pF600V 0.1V
1000V 1V -
Accuracy: At 5 to 100% of range and 1000V range is 200 to 1000V.
less than 1500V peak
For non-sinusoidal waveforms, add ±(2% + 2% of full scale), for Crest factor<3.
CMRR: 60dB or more DC to 60Hz (Rs=1kΩ)
4 counts or less is corrected to 0, Response time: 2 sec max.
DC Current Measurement A
Range Resolution Accuracy Voltage Drop Maximum
Input Current
600μA 0.1μA 0.2+2 < 0.12mV/μA 440mA Protected by
a 440mA/1000V fuse.
6000μA 1μA
60mA 0.01mA < 3.3mV/mA
440mA 0.1mA 0.5+56A 0.001A < 0.1V/A 10A Protected by
a 10A/1000V fuse.
10A 0.01A
Response time: 1 sec max.
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