Matsusada Precision AK Series User manual

Instruction Manual
F-RA-001-3R2
MODEL AK series
(3kW, 4kW)
B/N 030.9.010 *030.9.010*Rev. 1.0

Note
◆All rights reserved.
◆No part of this publication may be reproduced, stored in a retrieval system, or transmitted,
in any form, or by any means, mechanical, electronic, photocopying, recording, or
otherwise, without the prior written permission of Matsusada Precision.
◆
No patent liability is assumed with respect to the use of the information contained herein.
Moreover, because Matsusada Precision is constantly striving to improve its high-quality
products, the information contained in this manual is subject to change without notice.
Every precaution has been taken in the preparation of this manual. Nevertheless,
Matsusada Precision assumes no responsibility for errors or omissions.
Neither is any liability assumed for damages resulting from the use of the information
contained in this publication.
Warranty
◆For details, refer to the following website.
https://www.matsusada.com/support/manufacturer_warranty.html

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Matsusada Precision
AK series
For Safe Use of the Product
◆Introduction
The product generates high-voltage and high-energy.
Therefore, wrongly handling or operating the product may result in death or serious injury and maybe
property damage as well. In order to use the product safely, read the instruction manual thoroughly before
use to understand how to use and operate it properly.
Please note that we will not be held responsible for any damage or loss caused by not following the
warnings, cautions, and procedures described in the manual.
Keep the manual with you so that you can read it whenever you want.
◆Symbols
Symbols are used in the manual and product, which indicate precautions to be observed for safe use.
Understand these symbols first and then read the manual thoroughly.
Some symbols below are not used in products.
Indicates a potentially hazardous situation, which, if not avoided, may
result in serious injury or death.
Indicates a potentially hazardous situation, which, if not avoided, may result
in minor or moderate injury or in property damage.
Indicates danger/warning/caution. Refer to
the instruction manual when this symbol
appears on the unit.
Frame or chassis terminal
Indicates the possible danger of electric
shock under specific conditions, which
may result in serious injury or death.
Ground terminal
High Temperature Caution:
Indicates the possible danger of injury by
high temperature under specific
conditions.
Power ON
Indicates general prohibitions, including
warnings.
Power OFF
Indicates what must be followed.
Standby
Protective earth terminal (ground terminal
for preventing electric shock)
Bistable push button switch
ON
Indicates the possible danger of death if
you drink it and burns or blindness if it
attaches.
Bistable push button switch
OFF
Indicates the possible danger of exposure
to radiation.
Alternative Current

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Matsusada Precision
AK series
Understand the risks.
The Product generates high-voltage and high-energy.
The product is designed for electrical engineers or the equivalents who install, wire, and operate it.
Read the instruction manual thoroughly before use and familiarize yourself with the proper use and
danger of the product.
Make sure to allow only specific people to handle the product.
Make sure to allow only the following people to handle the product:
1. who are electrical engineers or the equivalents and have already familiarized themselves with the
proper use and danger of the product, or
2. who are electrical engineers or the equivalents and have already been trained by the
above-mentioned people, or
3. who work under the supervision of the above-mentioned people.
If people other than those listed above install, wire, or operate the product, it may cause electric
shock, burnout, or injury.
Do not open or remove the case or panel of the product.
Do not disassemble, repair, or modify the product by yourself. High-voltage is applied to the inside of it.
Otherwise, it may cause electric shock, fire, or malfunction.
Moreover, if you do it, the safety and functions are not covered with the warranty.
The product does not suit to install and use in places where children may be present.
The product is designed to be installed in places such as factories or laboratories. Do not install and use it
where children may be present.
Make sure to ground it.
When the product has a protection ground terminal or GND terminal, make sure to ground it.
When theAC line input of it is an inlet type, connect the attached power cable or a power cable suitable for
your area to an outlet with the ground. Otherwise, it may result in electric shock or fire.
Regarding power cable
When a power cable is enclosed or attached to the product, do not use it for other products.
When no power cable is enclosed with the product, prepare the power cable suitable for the usage
environment and area by yourself.
Regarding the connection of power cable
Electrical engineers or the equivalents who have already been familiarized with the proper use and danger
of the product should connect the power cable to the AC input by referring to the instruction manual.
Regarding products that have acquired the safety standard, check the page describing the over-voltage
categories too.
Do not process or damage power cables
It may result in electric shock or fire.
Regarding the input voltage
Check the page describing the input terminals and input voltage in the instruction manual.
Do not provide any voltage out of the specifications.

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AK series
Regarding the fuse
The product builds in a protective fuse. In the case where a fuse holder is arranged outside of the product,
you can replace it by yourself. Refer to the instruction manual to replace it.
In the case where a fuse holder is not arranged outside of the product, you cannot replace it by yourself.
In this case, do not open the case or panel of the product and contact us.
The product is designed for indoor use.
Use the product indoors only, not outdoors. Even indoors, do not use it if there is a possibility of water
leakage, flooding, or snow covering.
Regarding operating temperature and humidity
Use the product within the range of the specifications describing in the instruction manual.
Do not use it in a place where the ambient temperature exceeds the specified range or a closed place.
Do not install the product in places where condensation may occur.
Otherwise, insulation deteriorates and it may cause electric shock, fire, or malfunction.
Do not place anything on top of the product.
Otherwise, they may fall or tumble from it.
Do not put anything into the product.
Do not put foreign objects such as metal or liquid into the product through the air inlets, air outlets, or other
openings. Otherwise, it may result in electric shock, fire, or malfunction.
Operate the product with the right hand.
Use only your right hand to operate the product and keep your left hand away from it, which can reduce
the risk of electric current flowing through the left hand to the vital organs of the body in the event of an
electric shock.
Do not touch the wiring/load connected to the output and any terminals/connectors during the
operation or just after turning output off.
Very high-voltage is on the terminals and connectors during the operation and even just after the output is
turned off. Touching them may result in serious injury or death by electric shock.
The terminals here mean all terminals like input and output terminals and terminals for communications
and remote controls.
Turn off the product before touching the wiring/load connected to the product and any
terminals/connectors on the product and cut it off from the AC input.
Before touching the terminals/connectors and wiring/load, turn off the product and unplug the AC input
cable from the outlet or turn off the AC input breaker. Then, check there is no voltage remained using a
tester.
Since the output and sense terminals are connected to condensers in it, there is high-voltage remained on
them even just after it is turned off.
In order to avoid electric shock, ground the terminals to discharge using a short-circuit grounding
apparatus and check the voltage again.
The terminals here mean all terminals like input and output terminals and terminals for communications
and remote controls.

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Level the product out to use for good heat dissipation.
Do not install the product upside down or sideways. If not, the inner heat dissipation will be insufficient.
It may result in smoke or fire due to components deterioration.
Do not install the product in a place where cold air directly blows to it.
It may result in electric leakage or burnout due to condensation.
Do not install the product in a place where it is exposed to corrosive gases or liquids.
It may result in smoke or burnout due to components deterioration.
Do not install the product in a dusty place.
Accumulating dust in the air inlet will make hard to cool it down it, it may result in malfunction.
In that case, remove dust immediately.
Do not block the air inlet and outlet.
Secure 30 cm space at least around the openings.
If they are blocked, the product cannot show the rated performance due to the internal temperature
increase. Moreover, components deteriorate and it may result in smoke or fire.
Remove wiring to and from the product when work like welding near it is done.
Do not wipe the equipment with a dust cloth wet with chemicals (thinner or the like) or water.
Otherwise, it may result in an electric shock, electric leakage, or burnout due to water getting inside.
Regarding fan replacement
When products equip a fan, it has a lifetime. It will be worn out and deteriorated with the time passed and
its operation may become unstable. Also, its lifetime greatly varies depending on the usage environment
such as temperature, humidity, dust. It requires to be replaced at regular intervals to extend the lifetime.
For the replacement, contact us.
(It requires a replacement charge separately. Do not replace it by yourself, as there is a risk of electric
shock.)

Table of Contents
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Matsusada Precision
AK series
Table of Contents
For Safe Use of the Product i
Table of Contents v
1. Introduction 1-1
1-1 Introduction 1-1
1-2 Specifications 1-1
1-3 Unpacking the Power Supply 1-2
1-4 Installation Conditions 1-2
1-4-1 Safety 1-2
1-4-2 Connecting AC Line Input Cord 1-3
1-4-3 How to Ground 1-4
1-4-4 Connecting to Load 1-6
1-5 Before Troubleshooting 1-6
2. Exterior View Diagram 2-1
2-1 Front Panel 2-1
2-2 Display Panel Details 2-1
2-3 Rear Panel 2-2
2-4 Dimensions (1 to 60kV) 2-3
2-5 Dimensions (80 to 120kV) 2-4
3. Normal Operation 3-1
3-1 Operation 3-1
3-2 Protection 3-2
3-2-1 Over Voltage Protection (O.V.P.) 3-2
3-2-2 Over Temperature Protection 3-2
3-2-3 External Voltage Limit Protection 3-2
4. Advanced Operation 4-1
4-1 Introduction 4-1
4-2 Function of TB1 Interface Connector 4-1
4-3 Selecting Internal Control (INT)/External Control (EXT) 4-2
4-4 External Voltage Control 4-3
4-4-1 Voltage Control by External Voltage (LV) 4-3
4-4-2 Current Control by External Voltage(LC) 4-3

Table of Contents
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Matsusada Precision
AK series
4-5 External Volume Control 4-3
4-5-1 External Volume Voltage Control (LRv) 4-3
4-5-2 External Volume Current Control (LRc) 4-3
4-5-3 External (EXT) Output Voltage Control and Internal (INT) Cut-off Current Control 4-4
4-6 Remote Switch ON/OFF (LS) 4-4
4-7 Door switch (LD) = Interlock 4-5
4-8 Output Current Monitor, Output Voltage Monitor 4-6
4-8-1 Output Current Monitor (L1) 4-6
4-8-2 Output Voltage Monitor (L2) 4-6
4-9 HV Status Signal 4-6
5. Options 5-1
5-1 Floating Ground (LF) 5-1
5-2 Slow Start (LW) 5-2
5-3 Overload Trip (LOc) 5-2
5-4 AC Input 400V L (400V) 5-2
5-5 Master Slave (LMs) 5-3

1 Introduction
1-1
Matsusada Precision
AK series
1Introduction
1-1 Introduction
Thank you very much for your purchase of our product HIGH VOLTAGE POWER SUPPLY. We have
done our best to for the quality control of our products. Please handle this unit properly according to
this instruction manual so that you can use the full performance of this unit safely for long.
We have carefully prepared this instruction manual, but if you find any doubtful or unclear point or any
omission, please kindly contact us shortly.
1-2 Specifications
Input Voltage AC208V、50/60Hz、3φ
Output Control Local mode: For constant voltage mode front panel 10-turn potentiometer
For constant current mode front panel 10-turn potentiometer
Remote mode: For constant voltage mode 0 to 10Vdc external voltage
For constant current mode 0 to 10Vdc external voltage
Voltage Regulation Line: ±0.005% of maximum voltage for ±10% input line change
Load: 0.005% of maximum voltage +400mV for 10 to 100% load change
Current Regulation Line: ±0.05% of maximum current for ±10% input line change
Load: 0.05% of maximum current +100μA for 10 to 100% load change
Ripple Less than 0.1%p-p + 1Vrms
Stability 0.01%/Hr
Temperature Coef 0.01%/°C
Metering Output voltage: 3½-digit meter
Output current: 3½-digit meter
Monitor Output Output voltage monitor: 10V/maximum output voltage
Output current monitor: 10V/maximum output current
(Output impedance 1kΩ)
Protection Overvoltage, Over Load, Short Circuit, Arc, Over Temperature
Other functions Remote switch ON/OFF, Door switch, Output status signal output (internal relay)
Temperature Temperature 0 to 40°C (Operating)、-20 to 70°C (Storage)
Humidity 30 to 80% RH (no condensation)
* These Specifications are at the maximum rated output after a warm-up period unless otherwise specified.

1 Introduction
1-2
Matsusada Precision
AK series
1-3 Unpacking the Power Supply
When unpacked the unit, please check the following accessories are enclosed with power supply main
body.
<ACCESSORIES>
●Instruction manual
●Output cable
●Interface (TB1) D-sub connector (1 pc.) *Installed on rear panel (TB1)
<Initial Checking>
●Check the panel and chassis for any apparent trace of impact such as a dent.
If any failure is found, contact the carrier and the manufacturer.
1-4 Installation Conditions
1-4-1 Safety
Warning
This unit is a high voltage power supply. Observe the safety precautions and operate correctly, or
an electric shock or a fatal accident may be caused.
Observe the following precautions in operating and inspecting this power supply to operate and
handle correctly.
●Install the power supply unit horizontally for use.
●The top, side, front and rear panels have cooling air supply and exhaust openings.
The power supply must be operated with adequate space and good ventilation.
●Keep enough space for air intake (more than 30cm from front panel) and exhaust (more than 30cm
from rear panel).
●External cabinet shall have the same size of intake hole and exhaust space.
●In case that the power supply is operated in the closed cabinet, such arrangement as forced
ventilation shall be required so that temperature by exhausted air will not be taken into air intake of
power supply.
●Make sure no liquid or metal piece is taken into the vent holes of power supply.
●Do not put any object on the power supply unit.
●Do not operate the power supply in a dusty area or in corrosive gas environment.
●Do not use any substitute for the parts in the internal circuits or do not modify them without
permission.
●This power supply is designed to a 19 inch rack. The chassis should be supported by the guide in
mounting. Never support it with the front panel mounting hole only.
●The front panel handle is used to change the direction of the power supply or pull out the power
supply mounted onto the rack. Do not use the handle with bearing the whole weight of the power
supply on the handle.
●Carefully handle the power supply with giving no impact in carrying. The weight of power supply is
about 25kg, and It is dangerous for one person to carry. Two persons or more should hold to carry
or a cart should be used to carry.
●Do not place the power supply where the possibility of condensation.
NO
MUST
MUST
NO
NO
NO
NO
NO
MUST
MUST
MUST
NO
NO

1 Introduction
1-3
Matsusada Precision
AK series
●Contact us for repair. The power supply should be repaired by us.
●In case the welding process is presence nearby the power supply, unplug all the connections
from the power supply.
1-4-2 Connecting AC Line Input Cord
1 to 60kV model
●Connect the solderless terminal (φ4) of AC input cable to the rear panel AC input connector L1, L2,
L3, and (M4).
80 to 120kV model
●Connect the solderless terminal (φ6) of AC input cable to the rear panel AC input connector L1, L2
and L3 (M6), ground to screw ground terminal (M5) located below AC input connector.
Do not connect to NC terminal.
●Place the cover enclosed for your safety.
●Electrically ground the power supply main body with the AC line input connector,
or it is very dangerous.
●Input voltage: AC208V 50/60Hz three phase
●The rated input voltage is set when the unit is dispatched from the factory.
Verify the input voltage indicated on the rear panel and input the correct voltage.
●Even the input voltage is different from the above due to special specifications, verify the
input voltage indicated on the rear panel and input the correct voltage
●Any wrong voltage input may damage the unit.
L3
L2
L1
NC
！ 
CAUTION

！
！ 
CAUTION

Must
1 to 60kV:
AC line input connector
L1 L2 L3
M4
80 to 120kV:
AC line input connector
M6
M5
Fig. 1.1

1 Introduction
1-4
Matsusada Precision
AK series
1-4-3 How to Ground
●For safe operation, be sure to ground the ground terminal of power supply at one
point on the ground.
・If the Load frame is not grounded （1-2kV output models）
・If the Load frame is grounded （over 3kV output models）
MUST
Black cable (M6)
Fig. 1.2
Output cable
Load frame
Ground
Ground terminal
Rack –mount case
Wires should be :
・more than 5SQ
・
less than about 2m
・not bared
Load
MUST
Ground at one point.
Fig. 1.3
Output cable
Load frame
Ground
Ground terminal
Rack –mount case
Wires should be :
・more than 5SQ
・less than about 2m
・not bared
Load
MUST
Ground at one point
MUST

1 Introduction
1-5
Matsusada Precision
AK series
・If the Load frame is grounded （1-2kV output models）
・If the Load frame is grounded （over 3kV output models）
●Make sure to connect the GROUND terminal correctly as shown in Fig. 1.2, Fig. 1.3, Fig. 1.4 and
Fig. 1.5.
Poor grounding is dangerous and may cause an electric shock or damage the power supply.
●When load short-circuit or discharge is forecasted, make the GROUND cable thicker and shorter.
Ground at one point
Fig. 1.4
Load
Load frame
Rack –mount case
Wires should be :
・more than 5SQ
・
less than about 2m
・not bared
MUST
MUST
Black cable（M６）
Output cable
Ground terminal
Ground at one point
Fig. 1.5
Load
Output cable
Ground terminal
Load frame
Rack –mount case
MUST
MUST
Wires should be :
・more than 5SQ
・
less than about 2m
・
not bared

1 Introduction
1-6
Matsusada Precision
AK series
1-4-4 Connecting to Load
●Select the POWER ON/OFF switch to OFF.
(For extra safety, remove the power AC line before working.)
●Make sure to connect the power supply main body and the load cabinet to the GROUND.
●Connect the enclosed high voltage shielded cable to the load cabinet. (Fig. 1.2 and Fig. 1.3)
In case of touching the load after high voltage is powered OFF
1. Set the output voltage to 0 or select the OUTPUT ON/OFF switch to OFF.
2. Make sure that the unit output voltage meter indicates 0.
3. Select the POWER ON/OFF switch to OFF.
4. Ground the output for more than 10 seconds and use another high voltage meter to make sure
that the voltage is zero. Especially, it is dangerous when capacitive load is applied or
when long cable is attached.
5. Touch the load with your right hand.
1-5 Before Troubleshooting
●No output voltage
1. Check if the specified voltage is input.
・Power supply input voltage
・Control voltage 0 to10V in external voltage controlling.
・Control current 0 to 10V in external voltage controlling..
2. Check if the remote switch (LS) and the door switch (LD) are correctly connected.
●Discharge noise from the high voltage output
Check if the high voltage connector plug (arrow in the figure below) is contaminated.
The dirty plug may cause electric discharge in the connector.
Wipe away the dirt with cloth soaked in alcohol and dry completely to use.
Warning

2 Exterior View Diagram
2-1
Matsusada Precision
AK series
2 Exterior View Diagram
2-1 Front Panel
2-2 Display Panel Details
①ＯＴ Over temperature. Internal temperature is abnormally high.
②ＬＤ Interlock. Interlock is on.
③ＥＸＴ Remote. Unit is in remote control mode.
④ＣＶ Constant Voltage (CV) mode. Unit is CV mode.
⑤ＣＣ Constant Current (CC) mode. Unit is CC mode
⑥Output current digital meter
⑦Output voltage digital meter
①POWER ON/OFF switch ⑤Output voltage setting dial
②OUTPUT ON/OFF switch ⑥Output current setting dial
③OUTPUT ON LED ⑦Air intake
④Display panel
②
①
③
④
⑤
⑥
Fig 2-1 Front panel
Fig. 2-2 Display panel details
ＯＴ
ＬＤ
ＥＸＴ
ｋＶ
ｍＡ
ＣＣ
ＣＶ
①
②
③
⑦
⑥
④
⑤
⑦

2 Exterior View Diagram
2-2
Matsusada Precision
AK series
2-3 Rear panel
①Output connector
②LF terminal (for LF option)
③Ground terminal
④Interface connector (TB1)
⑤Exhaust holes
⑥AC input connector
Fig. 2-3 Rear panel (1 to 60kV)
②
④
GND
TB1 S2
①
⑤
⑥
③
OUTPUT
OUTPUT
①
②
③
④
⑤
⑥
TB1 S2
GND
⑦
①Output connector
②LF terminal (for LF option)
③Interface connector (TB1)
④AC input connector
⑤Ｐ.Ｅ（ ）
⑥Exhaust holes
⑦Ground terminal
Fig. 2-4 Rear panel (80 to 120kV)

2 Exterior View Diagram
2-3
Matsusada Precision
AK series
2-4 Dimensions (1 to 60kV)

2 Exterior View Diagram
2-4
Matsusada Precision
AK series
2-5 Dimensions (80 to 120kV)
Plastic foot

3 Normal Operation
3-1
Matsusada Precision
AK series
3 Normal Operation
Warning This instrument generates HIGH VOLTAGE., HIGH ENERGY.
Ignoring the instructions for safe operation of the power supply may result to DEATH
or BODILY INJURY due electric shock. Please follow the instructions.
Caution Always operate the unit with the top cover on.
3-1 Operation
1. Insure that the power switch is in the OFF position (0).
2. Turn the output voltage setting dial (VOLTAGE) and the output current setting dial (CURRENT)
counterclockwise and make sure the dials read “0"
3. Connect the AC power cable and Ground wire product as shown in section of [1-4-3 How to Ground].
To ensure your safety during installation, make sure the unit is always grounded.
4. Attach the output cable to the load.（Refer to [1-4-4 Connecting to Load].）
5. Connect the enclosed AC line input cable to AC input connector on the rear panel.
（Refer to [1-4-2 Connecting AC Line Input Cord].）
Check the input voltage indication on the rear panel whether AC input voltage is correct or not.
6. Select the POWER ON/OFF switch to ON (1), and the meter lamp is lit for stand-by.
7. Turn the OUTPUT ON/OFF switch to the ON position. The red indicator (OUTPUT ON LED) will light
up to indicate that the power supply is ready for operation. （In case of turning the OUTPUT ON/OFF
switch to the ON position, wait 10 seconds or more, and then operate the power supply.）
8. Turn the output voltage setting dial (VOLTAGE) to set a desired output
voltage. Turn the output current setting dial (CURRENT) to set a desired
output current.
CC LED is lit up when the unit is in constant current mode.
Move the dial locking lever in the arrow direction as shown in the right figure,
and the set voltage and the set current can be locked.
The output voltage and the output current are indicated by the front panel
meter.
9. To end the operation, set the output voltage setting dial to 0(leave it as it is in case the same voltage
is used again for next time), turn OUTPUT ON/OFF switch off first, and then turn POWER ON/OFF
switch to off.
Warning: Never touch the load immediately after the operation ends. It is very dangerous.
When capacitive load is used, carefully connect the load to the ground and make
sure that electricity is discharged.
Locking
lever
Setting dial
MUST

3 Normal Operation
3-2
Matsusada Precision
AK series
3-2 Protections
3-2-1 Overvoltage Protection (O.V.P.)
This unit is equipped with the over voltage protection. To protect the power supply and the load, the
voltage is tripped approx. 110% of the maximum rated voltage even if any abnormality occurs.
Once select the POWER SWITCH to OFF and next select to ON again to reset.
O.V.P. ―― Overvoltage Protection
3-2-2 Over Temperature Protection
This unit is equipped with the built-in circuit to cut off the high voltage output at the set internal
temperature or higher. After making sure that the OT LED is OFF, select the OUTPUT ON/OFF
switch to OFF to reset.
3-2-3 External Voltage Limit Protection
This unit is equipped with the external voltage limit protection. To protect the power supply and the
load, the voltage and current is limited at approx. 110% of the maximum rated voltage or current
even if any abnormality occurs.