Kikusui 149-10A User manual

Part No. Z1-109-820, IA001705
Jul. 2016
149-10A
OPERATION MANUAL
High Voltage Digitalmeter

Use of Operation Manual
Please read through and understand this Operation Manual before operating the
product. After reading, always keep the manual nearby so that you may refer to it
as needed. When moving the product to another location, be sure to bring the
manual as well.
If you find any incorrectly arranged or missing pages in this manual, they will be
replaced. If the manual gets lost or soiled, a new copy can be provided for a fee.
In either case, please contact Kikusui distributor/agent, and provide the "Kikusui
Part No." given on the cover.
This manual has been prepared with the utmost care; however, if you have any
questions, or note any errors or omissions, please contact Kikusui distributor/
agent.
Reproduction and reprinting of this operation manual, whole or partially, without
our permission is prohibited.
Both unit specifications and manual contents are subject to change without
notice.
Copyright© 1994 Kikusui Electronics Corporation.

149-10A 1
Power Requirements of this Product
Power requirements of this product have been changed and relevant
sections of the Operation Manual should be revised accordingly.
(Revision should be applied to items indicated by a check mark ✓.)
Input voltage
The input voltage of this product is ____________________ Vac,
and the voltage range is _____________ to _____________ Vac.
Use the product within this range only.
Input fuse
The rating of this product's input fuse is
_____________ A, _____________ Vac, and ______________ .
WARNING
• To avoid electrical shock, always disconnect the power cord or turn
off the switchboard before attempting to check or replace the fuse.
• Use a fuse element having a shape, rating, and characteristics
suitable for this product. The use of a fuse with a different rating or
one that short circuits the fuse holder may result in fire, electric
shock, or irreparable damage.

2149-10A
Power Requirements of this Product (cont'd)
Power cord
The product is provided with power cords described below. If the power
cord has no plug, attach a plug or crimp -style terminals to the power cord
in accordance with the wire colors specified in the drawing.
WARNING
• The attachment of a plug of power cord or crimp-style terminals
must be carried out by qualified personnel.
Blue (NEUTRAL )
Brown (LIVE)
Green/Yellow (GND)
White (NEUTRAL)
Black (LIVE)
Green or Green/Yellow (GND)
Kikusui agents can provide you with suitable power cord.
For further information, contact Kikusui distributor/agent.
NEMA5-15 CEE7/7 GB1002
Without a plug Without a plug
Plug for Europe
Plug for USA Plug for China
Provided by Kikusui distributor/agent

149-10A 3
Safety Precautions
The following safety precautions must be observed to avoid fire
hazard, electrical shock, accidents, and other failures. Keep them in
mind and make sure that all of them are observed properly.
Operation
Manual
Line
Voltage
Users
• This product must be used only by qualified
personnel who understand the contents of this
operation manual.
• If it is handled by disqualified personnel, personal
injury may result. Be sure to handle it under
supervision of qualified personnel (those who have
electrical knowledge.)
• This product is not designed or manufactured for
general home or consumer use.
Purposes of use
• Do not use the product for purposes other than those
described in the operation manual.
Input power
• Use the product with the specified input power
voltage.
• For applying power, use the power cord provided.
Note that the provided power cord is not use with
some products that can switch among different input
power voltages or use 100 V and 200 V without
switching between them. In such a case, use an
appropriate power cord. For details, see the relevant
page of this operation manual.

4149-10A
Fuse
• With products with a fuse holder on the exterior
surface, the fuse can be replaced with a new one.
When replacing a fuse, use the one which has
appropriate shape, ratings, and specifications.
Cover
• There are parts inside the product which may cause
physical hazards. Do not remove the external cover.
Installation
• To avoid electrical shock, connect the protective
conductor terminal to electrical ground (safety
ground).
• When installing products with casters, be sure to lock
the casters.
Relocation
• Turn off the power switch and then disconnect all
cables when relocating the product.
• Use two or more persons when relocating the product
which weights more than 18 kg. The weight of the
products can be found on the rear panel of the
product and/or in this operation manual.
• Use extra precautions such as using more people
when relocating into or out of present locations
including inclines or steps. Also handle carefully
when relocating tall products as they can fall over
easily.
• Be sure the operation manual be included when the
product is relocated.
GNL

149-10A 5
Operation
• Check that the AC input voltage setting and the fuse
rating are satisfied and that there is no abnormality on
the surface of the power cord. Be sure to unplug the
power cord or stop applying power before checking.
• If any abnormality or failure is detected in the
products, stop using it immediately. Unplug the power
cord or disconnect the power cord from the
switchboard. Be careful not to allow the product to be
used before it is completely repaired.
• For output wiring or load cables, use connection
cables with larger current capacity.
• Do not disassemble or modify the product. If it must
be modified, contact Kikusui distributor/agent.
Maintenance and checking
• To avoid electrical shock, be absolutely sure to
unplug the power cord or stop applying power before
performing maintenance or checking.
• To maintain performance and safe operation of the
product, it is recommended that periodic
maintenance, checking, cleaning, and calibration be
performed.
Service
• Internal service is to be done by Kikusui service
engineers. If the product must be adjusted or
repaired, contact Kikusui distributor/agent.
Check?

6149-10A
Safety Symbols
This operation manual and this product use the following safety
symbols. Note the meaning of each of the symbols to ensure safe use
of the product. (As using symbols depend on the product, all of
symbols may not be used.)
Indicates the presence of 1000V or higher.
Inadvertently touching such a part may cause electrical
shock resulting in death. If it is necessary to touch
such a part to conduct work, first make sure no voltage
is being supplied.
Indicates the possibility of personal injury or death.
Never fail to follow the operating procedure. Do not
proceed beyond a WARNING sign until the noted
conditions are fully understood and met.
Indicates the existence of damage to the product or
connected equipment. Always follow the operating
procedure. Do not proceed beyond a CAUTION sign
until the indicted conditions are fully understood and
met.
Indicates additional information such as operating
procedure.
Describes technical terms used in this manual.
Indicates action prohibited.
Indicates general warning, caution, risk of danger.
When this mark is indicated on the product, refer the
relevant section of the Operation Manual.
Indicates a protective conductor terminal.
Indicates a chassis (frame) terminal.
or
Description
WARNING
NOTE
CAUTION

149-10A 7
Contents
Power Requirements of this Product_______________ 1
Safety Precautions __________________________ 3
Safety Symbols _______________________________ 6
Chapter 1 General Description __________________ 8
Chapter 2 Preparation _________________________ 9
2.1 Receiving Inspection 9
2.2 AC Line Requirements 9
2.3 Connecting the Power Cord 10
Chapter 3 Operation Method___________________ 11
3.1 Part Names and Functions 11
3.2 Measuring Method 12
3.2.1 Measuring Procedure 12
3.2.2 To Correct the Meter Reading for High Impedance
Measured Object 14
3.2.3 Measured Object's Polarity and Ground 14
Chapter 4 Specifications ______________________ 16
Chapter 5 Calibration ________________________ 17
5.1 Calibration of Digitalmeter 17
5.2 Replacing the Fuse 18
Chapter 6 Block Diagram _____________________ 19

8149-10A
Kikusui Model 149-10A High Voltage Digitalmeter measures AC
and DC voltages of up to 10 kV, with a high accuracy.
As the meter input impedance is as high as 1000MΩ, the meter is
best suited for measurement of voltages of high source impedance
circuits.
The meter is compact and light (approx.3kg), but its measuring
accuracy is high. Thus the meter can also be used conveniently as
a portable calibration instrument or to calibrate the voltage of a
withstanding voltage tester.
General Description
Chapter 1

149-10A 9
2.1 Receiving Inspection
Immediately upon receipt of the product, inspect it for any damage
which might have been sustained while in transportation. If any
signs of damage are found, contact Kikusui distributor/agent.
2.2 AC Line Requirements
Before turning on the POWER switch of the tester, be sure that
your AC line voltage.
The AC line requirements of the tester are as follows:
• Nominal voltage: 100 V
• Voltage tolerance: ±10 % of nominal voltage
• Nominal frequency: 50/60 Hz
Testers that operate on other AC line voltages as shown below also
are available as factory-modification options.
• 110 V, 120 V, 220 V, 230 V, or 240 V
The following table is printed on the rear panel of the tester. If
nothing is marked in the "LINE VOLTAGE" column, the nominal
voltage is 100 V. If a change has been made, a mark is indicated to
the left of the corresponding voltage.
LINE VOLTAGE FUSE
STANDARD 100 V
250V
0.5A
110 V
120 V
220 V
250V
0.3A
230 V
240 V
Preparation
Chapter 2

10 149-10A
2.3 Connecting the Power Cord
This product is designed as an equipment of IEC Overvoltage
Category II (energy-consuming equipment supplied from a fixed
installation).
WARNING
Risk of electric shock.
• This product is IEC Safety Class I equipment
(equipment with a protective conductor terminal). To
prevent electric shock, be sure to connect the
protective conductor terminal of the product to electrical
ground (safety ground).
• The product is grounded through the power cord
ground wire. Connect the protective conductor terminal
to earth ground.
NOTE
• Use the supplied power cord to connect to the AC line.
• Do not use the supplied power cord with other instruments.
• The power cord with a plug can be used to disconnect the
product from the AC line in an emergency. Connect the plug
to an easily accessible power outlet so that the plug can be
removed from the outlet at any time.
• Secure adequate space around the power plug. Do not insert
the power plug to an outlet where accessibility to the plug is
poor. And, do not place objects near the outlet that would
result in poor accessibility to the plug.
1. Turn off the POWER switch.
2. Check whether or not the AC line is compatible with the input
rating of the the tester.
See section 2.2, "AC Line Requirements."
3. Connect the power cord to the AC inlet (AC LINE) on the rear-
panel.
4. Connect the power cord plug to an outlet with a ground
terminal.

149-10A 11
3.1 Part Names and Functions
Protective conductor terminal
AC LINE
Connect the supplied power cord here.
FUSE
Input power fuse
LINE VOLTAGE/FUSE
Indicates the AC line voltage and
fuse rating of the meter.
Voltmeter
Indicates the measured voltage.
AC/DC
Mode selection switcch
LEDs indicate selected mode.
POWER
AC power switch
LOW
Terminal for ground line of
measured input voltage
INPUT
Terminal for high potential line of measured input voltage
CALIBRATION (AC/DC)
Semi-fixed resistors for calibration
Do not touch these resistors except
when calibrating the meter.
Plastic screw
Fixes the test lead (red).
Fig.3.1 Front panel/Rear panel
Operation Method
Chapter 3

12 149-10A
3.2 Measuring Method
3.2.1 Measuring Procedure
WARNING
• For measurement of 5 kV or higher voltage, be sure to
use the HTL2.5DH high voltage test lead.
• Be sure to connect securely between the 149-10A and
the measured object with the supplied high voltage test
leads. Note that, if the low voltage test lead is
accidentally disconnected while the high voltage is
being input, electric shock hazards may be caused or
the meter may be seriously damaged.
NOTE
• To measure with highest accuracy, warm up the 149-10A for
at least 15 minutes.
• If the 149-10A is used in dusty atmosphere or the meter is
used continuously for a long time with a high voltage being
input, dust may be collected on the INPUT terminal section.
Because input resistance degradation or voltage dividing
ratio disturbance, clean at appropriate intervals the INPUT
terminal and the internal insulators using a clean, dry cloth.
• The AC/DC converter of the 149-10A is a mean-value
response system and is calibrated with the rms value of sine
wave. Therefore, that errors may be caused if the measured
voltage waveform is largely different from sine wave.
1. Turn on ( ) the POWER swich.
2. Connect the supplied high voltage test lead (black) to the LOW
terminal of the tester as shown in Fig. 3.2.
LOW terminal
High voltage test lead (black)
Put the test lead clamp like this.
Fig. 3.2 Low terminal connection

149-10A 13
3. Connect the supplied high voltage test lead (black) to the low
voltage side (GND side) of the measured object.
If the low voltage side (GND side) of the measured object is
unknown, see section 3.2.3, "Measured Object's Polarity
and Ground."
4. Insert the end of the supplied high voltage test lead (red) for a
sufficient length in the INPUT terminal of thr tester, and fix the
lead with the plastic screw.
5. Set the AC/DC switch in accordance with the output of the
measured object.
6. Connect the supplied high voltage test lead (red) to the high
voltage side of the measured object.
7. Check that the 149-10A and measured object are connected as
shown in Fig. 3.3.
8. Turn on the power of the measured object.
149-10A
High voltage test lead
TL05-TOS
or HTL2.5DH (5 kV or more)
Ground
Ground
A B
Measured
object
Ground the low voltage side.
Fig. 3.3 Connection for measuring

14 149-10A
3.2.2 To Correct the Meter Reading for High
Impedance Measured Object
The 149-10A input impedance is very high (1000MΩ). When the
internal impedance of the measured object is substantially high,
however, errors can be caused. In such a case, make correction
calculation as follows:
E = Eo 1+( )
o
1000M
γ
where, E : True voltage
Eo : Meter reading
γo : Internal impedance of measured object
In most cases the value of internal impedance (γo) is unknown. In
such cases, use the above equation as follows:
When γo ≤10 MΩfor example,
Eo < E ≤1.01 x Eo
As above, when the internal impedance is lower than 10MΩ, the
error caused impedance-wise is less than 1%. Measurement can be
done with an accuracy of this error plus meter accuracy.
3.2.3 Measured Object's Polarity and Ground
Be sure to connect the power cord of the 149-10A to a properly
grounded outlet. If grounding is not possible through the power cord,
ground the (protective conductor terminal) on the rear panel.
As shown in Fig. 3.4, if the 149-10A is not grounded and the low and
high voltage sides of the measured object are connected in reverse, the
applied high voltage may damage the inside of the meter.
149-10A
No
ground
High voltage test lead
Ground
A B
A: High voltage side
B: Low voltage side
Measured
object
Fig. 3.4 Improper connection

149-10A 15
If the 149-10A is grounded in Fig.3.4, terminals A and B of the
measured object are shorted through the ground and the measured
object is adversely affected. As such, if the low voltage side (GND
side) of the measured object is unknown, determine it by following
the procedure below, and connect properly.
■How to determine the polarity of the measured object
As shown in Fig. 3.5, connect a high voltage test lead to terminal A
or B, and assume the side with the higher voltage reading to be the
high voltage side.
149-10A
High voltage test lead
AB
Measured
object
Ground
Fig. 3.5 Polarity check

16 149-10A
Item
Power requirements 100V±10%, 50/60 Hz AC, approx. 10VA
Measuring ranges 0.500 to 10.000 kV AC/DC
AC: ±(1% of rdg + 0.05% of range)
DC: ±(0.5% of rdg + 0.03% of range)
at 23˚C±10˚C
*(for sine wave, at 50 to 60 Hz)
AC : 11kV rms (sine wave, 50 to 60 Hz)
DC : ±14 kV
Pulse : 15 kV peak
Display 7-segment LEDs
Double integration type.
3 samples/sec
Input resistance
Ambient temperature
and humidity: 0˚C to 35˚C (32˚F to 95˚F), 80% RH
External dimensions
:
Maximum dimensio
n
Weight Approx. 3 kg (6.6 lbs)
Power cord 1
TL05-TOS High voltage test leads 1 set
HTL2.5DH High voltage test lead 1
Operation manual 1
Overall Dimentions
Accessories
Maximum allowable
input voltages
Specification
For AC measurement, mean value response,
sine wave rms value calibration.
Type of voltmeter
Measuring accurancies
Specifications
Chapter 4

149-10A 17
5.1 Calibration of Digitalmeter
Calibrate the 149-10A once a year or more frequently.
■Instruments required for calibration
To calibrate the 149-10A covering its all measuring ranges, a
standard voltage generator which will provide the following
voltages is required.
AC: 10 kV ±0.1%
DC: 10 kV ±0.05%
If you cannot prepare an above standard voltage generator,
calibrate the 149-10A with a calibrator which can generate the
voltage range which you use, or order Kikusui distributor/agent
for calibration.
■Notes before calibration
•As a high voltage of 10 kV is dealt with when calibrating the
149-10A, pay full attention for safety.
•Before calibration, warm up the 149-10A for at least 60
minutes.
■Calibration
Set the 149-10A in the DC mode, apply a calibration voltage of
10 kV DC to the input terminal of the meter, and so adjust
CALIBRATION (DC) semi-fixed resistor on the side panel of
the 149-10A that it displays 10.000. Next, set the 149-10A in
the AC mode, apply a calibration voltage of 10 kV AC, and so
adjust the CALIBRATION (AC) semi-fixed resistor that the
149-10A displays 10.000. When doing this, the displayed value
may change by about three digits. For calibration, use the
center value. When adjustment for DC measurement is done,
the voltage dividing ratio of the input circuit varies. Be sure to
perform the DC calibration first.
Calibration
Chapter 5

18 149-10A
5.2 Replacing the Fuse
WARNING
• To avoid electric shock, always turn off the POWER
switch and unplug the power cord from an outlet before
replacing the fuse.
• Make sure that the replacement fuse is of the correct
shape, and rating for mater specifications. Never use a
fuse having a different rating; never short-circuit the
fuse holder.
1. Turn off the POWER switch and unplug the power cord from the
outlet.
2. Disconnect the power cord from the AC inlet on the rear panel.
3. Use a screwdriver to remove the fuse holder, as shown in Fig.
5.1.
Fuse
Fig. 5.1 Fuse holder