Yamato BS 200 User manual

Water Bath
Model
BS 200/400/600/660
Instruction Manual
- First Edition -
Yamato Scientific America Inc．
Santa Clara，CA
This paper has been printed on recycled paper
Thank you for purchasing "Water Bath, BS Series"
of Yamato Scientific Co., Ltd.
To use this unit properly, read this "Instruction
Manual" thoroughly before using this unit.
Keep this instruction manual around this unit for
referring at anytime.
WARNING!:
Carefully read and thoroughly understand the
important warning items described in this manual
before using this unit.

Contents
Cautions in Using with Safety...............................................................1
Explanation..................................................................................................................1
Table of Illustrated Symbols.........................................................................................2
Fundamental Matters of “WARNING!” and “CAUTION!”...............................................3
Before Using this unit............................................................................4
Requirements for Installation .......................................................................................4
Description and Function of Each Part ................................................7
Main Unit.....................................................................................................................7
Control Panel...............................................................................................................9
Operation Method ................................................................................10
Procedure..................................................................................................................10
Handling Precautions ..........................................................................11
Maintenance Method............................................................................13
Daily Inspection and Maintenance.............................................................................13
Long storage and disposal..................................................................14
When not using this unit for long term / When disposing............................................14
In the Event of Failure… ......................................................................15
After Service and Warranty .................................................................16
Specification.........................................................................................17
Wiring Diagram ....................................................................................18
Replacement Parts Table.....................................................................19
Reference .............................................................................................20
List of Dangerous Substances...................................................................................20

1
Cautions in Using with Safety
Explanation
MEANING OF ILLUSTRATED SYMBOLS
Varioussymbols are used in thissafety manual in order to use the unit without
danger of injury and damage of the unit. A list of problems caused by ignoring
the warningsand improper handling is divided asshown below.Be sure that you
understand the warningsand cautionsin this manual before operating the unit.
WARNING! If the warning is ignored, there is the danger of a problem that
may cause a serious accident or even fatality.
CAUTION! If the caution is ignored, there is the danger of a problem that may
cause injury/damage to property or the unit itself.
Meaning of Symbols
This symbol indicates items that urge the warning (including the caution).
A detailed warning message is shown adjacent to the symbol.
This symbol indicates items that are strictly prohibited.
A detailed message is shown adjacent to the symbol with specific actions not to
perform.
This symbol indicates items that should be always performed.
A detailed message with instructions is shown adjacent to the symbol.
Illustrated Symbols

2
Cautions in Using with Safety
Table of Illustrated Symbols
Warning
Warning,
generally
Warning,
high voltage
Warning,
high temperature
Warning,
drive train
Warning,
explosive
Caution
Caution,
generally
Caution,
electrical shock
Caution,
scald
Caution,
no road heating
Caution,
not to drench
Caution,
water only
Caution,
deadly poison
Prohibit
Prohibit,
generally
Prohibit,
inflammable
Prohibit,
to disassemble
Prohibit,
to touch
Compulsion
Compulsion,
generally
Compulsion,
connect to the
grounding
terminal
Compulsion,
install on a flat
surface
Compulsion,
disconnectthe
power plug
Compulsion,
periodical
inspection

3
Cautions in Using with Safety
Fundamental Matters of “WARNING!”and “CAUTION!”
WARNING!
Do not use this unit in an area where there is flammable or explosive gas
Never use this unit in an area where there is flammable or explosive gas.
This unit is not explosion-proof. An arc may be generated when the power switch is turned on or off,
and fire/explosion may result. (Refer to page20 “List of Dangerous Substances”.)
Always ground this unit
Always ground this unit on the power equipment side in order to avoid electrical shock due to a power
surge.
If a problem occurs
If smoke or strange odor should come out of this unit for some reason, turn off the power key right
away, and then turn off the circuit breaker and the main power. Immediately contact a service
technician for inspection. If this procedure is not followed, fire or electrical shock may result. Never
perform repair work yourself, since it is dangerous and not recommended.
Do not use the power cord if it is bundled or tangled
Do not use the power cord if it is bundled or tangled. If it is used in this manner, it can overheat and
fire may be caused.
Do not process, bend, wring, or stretch the power cord forcibly
Do not process, bend, wring, or stretch the power cord forcibly. Fire or electrical shock may result.
Substances that can not be used
Never use explosive substances, flammable substances and substances that include explosive or
flammable ingredients in this unit. Explosion or fire may occur.
Do not disassemble or modify this unit
Do not disassemble or modify this unit. Fire or electrical shock or failure may be caused.
CAUTION!
During a thunder storm
During a thunderstorm, turn off the power key immediately, then turn off the circuit breaker and the main
power. If this procedure is not followed, fire or electrical shock may be caused.

4
Before Using this unit
Requirements for Installation
WARNING!
1. Always ground this unit
Connect the power plug to a receptacle with grounding connectors.
Do not forget to ground this unit, to protect you and the unit from electrical shock in case of
power surge. Choose a receptacle with grounding connectors as often as possible.
Do not connect the grounding wire to a gas pipe, or by means of a lightning rod or telephone
line. A fire or electrical shock will occur.
2. Choose a proper place for installation
Do not install this unit in a place where:
Rough or dirty surface.
Flammable gas or corrosive gas is generated.
Ambient temperature exceeds 35C.
Ambient temperature fluctuates violently.
There is direct sunlight.
There is excessive humidity and dust.
There is a constant vibration.
Install this unit on a stable place with the space as shown below.
Main Unit
More than 15cm
Front side
3. Do not use this unit in an area where there is flammable or explosive gas
Never use this unit in an area where there
is flammable or explosive gas. This unit is
not explosion-proof. An arc may be
generated when the power switch is
turned ON or OFF, and fire/explosion may
result.
To know about flammable or explosive
gas refer to page20 “List of Dangerous
Substances”.

5
Before Using this unit
Requirements for Installation
4. Do not modify
Modification of this unit is strictly prohibited. This could cause a failure.
5. Installation on horizontal surface
Set this unit to the flattest place. Not setting this unit with its 4 legs covered with rubber
contacted to the setting place surface evenly could cause the unexpectible trouble or
malfunction.

6
Before Using this unit
Requirements for Installation
CAUTION!
6. Choose a correct power distribution board or receptacle
Choose a correct power distribution board or receptacle that meets the unit’s rated electric
capacity.
Electric capacity:
BS200: 220V AC, 4.5A
BS400: 220V AC, 6.5A
BS600: 220V AC, 6.5A
BS660: 220V AC, 6A
If the power supply voltage is lower than the required voltage, the capacity of the heater may
decrease, the temperature of the water may not rise with enough, or the temperature controller
may cause to be malfunction. Check whether the power line shares with other device(s) or not.
If does so, isolate the power line of this device from that (those) of other device(s).
7. Before/after installing
It may cause injure to a person if this unit falls down or moves by the earthquake and the
impact etc..To prevent, take measures that the unit cannot fall down, and not install to busy
place.
Touching the unit may cause a burn during and just after the operation. To prevent, take
measures that putting up a notice of operating etc..
8. Handling of power code
Do not entangle the power cord. This will cause overheating and possibly a fire.
Do not bend or twist the power cord, or apply excessive tension to it. This may cause a fire
and electrical shock.
Do not lay the power cord under a desk or chair, and do not allow it to be pinched in order to
prevent it from being damaged and to avoid a fire or electrical shock.
Keep the power cord away from any heating equipment such as a room heater. The cord's
insulation may melt and cause a fire or electrical shock.
If the power cord becomes damaged (wiring exposed, breakage, etc.), immediately turn off the
power at the rear of this unit and shut off the main supply power. Then contact your nearest
dealer for replacement of the power cord. Leaving it may cause a fire or electrical shock.
Connect the power plug to the receptacle which is supplied appropriate power and voltage.
9. Thermometer installation
Thermometer has line marking of im mersion level at around 76mm from iower end of
Thermometer. Im merse thermometer under water up to the im mersion level to read
Temperature properly.

7
Description and Function of Each Part
Main Unit
BS200
BS400
Rear view
(same as each type)
Clamp
Cover holder
(not equipped for BS200)
Pole
Control panel
Overflow tube
Thermometer
Cover
Power code
Pole bracket
Clamp
Pole
Thermometer
Pole bracket
Overflow tube
Cover
Control panel

8
Description and Function of Each Part
Main Unit
BS600
BS660
Clamp
Control panel
Overflow tube
Thermometer
Clamp
Pole
Thermometer
Pole bracket
Overflow tube
Control panel
Cover
Cover
Pole

9
Description and Function of Each Part
Control Panel
HEATER
ALARM
POWER
ON
OFF
OFF
30
40
60
80
100
℃
Name
Function
Power switch (Earth leakage breaker)
Turns ON/OFF the power.
Earth leakage test button
Uses for testing the earth leakage breaker function.
(Refer to the Page 13 ”Maintenance Method”.)
Power lamp
Lights on by turning on the power switch, lights off by
turning off the power switch.
Temperature setting dial
Uses for setting the operation temperature.
Heater lamp
Lights on while the heater is active.
Alarm lamp
Lights on when the orverheating prevention device is
activated.
Heater lamp
Power switch
(Earth leakage breaker)
Alarm lamp
Earth leakage
test button
Temperature
setting dial

10
Operation Method
Procedure
1. Prepare the water bath.
Pour appropriate amount of the water for each water bath as follows, and then set the options to
this unit;
BS200: around 4.7 liters, BS400: around 9 liters,
BS600: around 11 liters, BS660: around 14 liters
2. Turn on the power.
Connect this unit to the 100VAC±10% power source securely, toggle the power switch to "ON"
after connecting the ground wire without fail. (The power lamp is lit.)
3. Set the temperature.
Adjust the setting mark of the temperature setting dial to the required temperature. (The
heater lamp is lit.)
The temperature scale is prepared just as a guideline (not the precise temperature scale).
When the temperature rises around the required one, set the temperature reading the scale of
the thermometer prepared separately. After the in-bath temperature stays stable, use this unit.
NOTE)
The temperature varies slightly depending on the operating condition. Check whether the
temperature is matched to the required temperature during the operation sometimes.
4. Put the sample into the unit.
Put the sample into the open cover opening. When using the large sample container, remove
the whole cover with the opening.
5. Constant Water Supply Operation Method
When this unit operates under the constant water supply mode, use this unit injecting the water
to the overflow tube constantly. Note that never operate this unit under the unattached mode
for preventing from any accident.
Cock
Overflow tube
Rubber hose,
Silicon hose, etc.
Water quantity
inspection window
To main unit Drainage
NOTE)
There is the case that the temperature does not reach to the maximum specified temperature
depending on the water supply amount or water supply temperature when operating this unit
under the constant water supply mode.
6. Stop operation.
Turn the temperature setting dial back to "OFF", and turn OFF the power. If this unit is not
used for a long time, unplug the appliance from the receptacle.
7. Drain water from the water bath.
When draining the water from the bath, remove the water supply/drain hose of the overflow tube,
and drain the water. Change the water of the bath frequently, and be sure to clean the water
bath each time.

11
Handling Precautions
WARNING!
If a problem occurs
If smoke or strange odor should come out of this unit for some reason, turn off the power key
right away, and then turn off the breaker and the main power. Immediately contact a service
technician for inspection. If this procedure is not followed, fire or electrical shock may result.
Never perform repair work yourself, since it is dangerous and not recommended.
Substances that cannot be used
Never use explosive substances, flammable substances and substances that include explosive
or flammable ingredients in this unit. Explosion or fire may occur. (Refer to page20 “List of
Dangerous Substances”.)
CAUTION!
Do not step on this unit
Do not step on this unit. It will cause injury if this unit fall down or break.
Do not put anything on this unit
Do not put anything on this unit. It will cause injury if fall.
During a thunder storm
During a thunderstorm, turn off the power key immediately, then turn off the circuit breaker and
the main power. If this procedure is not followed, fire or electrical shock may be caused.
Heating medium
This unit is acceptable only the "Water" medium. Never use the heating medium such as oil for
this unit. Failure to do so could cause the fire or water leakage.
Use either pure water (distilled water, ion exchange water) or tap water without fail. Using well
water or bad-quality water could cause the damage or malfunction. Be sure to change the
water in the water bath frequently.
Water supply
When supplying water, pay attention not to spill water from the water bath or spread over the
water bath. Should be spread a water over the control panel, wipe it off completely. Failure to
do so could cause the electric leakage or electric shock.
Do not invert this unit
Do not invert this unit. This could cause a malfunction.
Pay attention not to heat empty bath. (Operation of overheating prevention device)
Do not operate this unit with empty water bath or with its heater spilled the water from. The
heater might be red hot, the heater life descends seriously. What is worse, it could cause a fire.
Be sure to check the water amount of the water bath before the operation, and supply water as
required. (Refer to the Page 10.)
This unit has the overheating prevention device in itself, and goes off the electricity at 130℃in
case of occurring the heating of empty bath. Please contact to Yamato Scientific Service Office
if the heating of empty bath is occurred.

12
Handling Precautions
CAUTION!
Temperature distribution, operating temperature range
This unit does not have the stirring function. Since the water flows with natural convection, the
in-bath water temperature differs. Besides, the operating temperature range differs depending
on the operating environment or operating condition. If the ambient temperature is low, or if the
unit is used in the place with strong wind or in the high altitude, the operating temperature might
not reach to the maximum temperature described in the performance table.
Boiling Temperature
The maximum temperature of this unit differs depending on the operating environment and
operating condition. There might be the case that the water does not boil depending on the
ambient temperature and operating condition.
The reason for not boiling might be raised as follows;
・Outside air temperature is low.
・Affected by the endothermic quantity of the sample.
・Lowered the power voltage.
Return after power failure
When power is supplied after a power failure, the device automatically starts operation again with
the same state as just before the power failure. It is danger that the device starts unattached
operation after a power failure. We recommend for you to turn off the switch of this unit if a
power failure occurs during operation.

13
Maintenance Method
Daily Inspection and Maintenance
WARNING!
Disconnect the power cable from the power source when doing an inspection or maintenance
unless needed.
Perform the daily inspection and maintenance after returning the temperature of this unit to the
normal one.
Do not disassemble this unit.
CAUTION!
Use a well-drained soft cloth to wipe dirt on this
unit. Do not use benzene, thinner or cleanser for
wiping. Do not scrub this unit. Deformation,
deterioration or color change may result in.
Monthly maintenance
Check the earth leakage breaker function.
1. Connect the power cord.
2. Turn the breaker on.
3. Push the red test switch by a ballpoint pen etc.
4. If there is no problem, the earth leakage breaker will be turned off.
For any questions, contact the dealer who you purchased this unit from, or the nearest sales
division in our company.

14
Long storage and disposal
When not using this unit for long term / When disposing
CAUTION!
When not using this unit for long term…
Turn off the power and disconnect the power cord.
WARNING!
When disposing…
Keep out of reach of children.
Treat as large trash.
Environmental protection should be considered
We request you to disassemble this unit as possible and recycle the reusable parts considering to
the environmental protection. The feature components of this unit and materials used are
listed below.
Component Name
Material
Exterior Parts
Exterior
Iron steel plate
Interior
Stainless steel SUS304
Shelf
Stainless steel SUS304
Cover
Stainless steel SUS304
Pole
Stainless steel
Clamp
Aluminum and resin
Electrical Parts
Power cord
Composites with synthetic rubber, Copper, Nickel
Temperature controller
Resin, Oil, Copper
Board
PC board, Condenser, Resistor, Relay

15
In the Event of Failure…
Trouble Shooting
Condition
Possible Causes
The device does not start when
turning on the power switch.
Power plug is not connected to the receptacle correctly.
Power failure.
The temperature does not rise.
The temperature adjusting knob is loosen.
The power voltage is too low.
The water does not come to boil.
Outside air temperature is low.
The device is affected by the endothermic quantity of the
sample.
The power voltage is too low.
In the case if the error other than listed above occurred, turn off the power switch and primary
power source immediately. Contact the shop of your purchase or nearest Yamato Scientific
Service Office.

16
After Service and Warranty
In Case of Request for Repair
If the failure occurs, stop the operation, turn OFF the power switch, and unplug the power plug.
Please contact the sales agency that this unit was purchased, or the Yamato Scientific's sales
office.
< Check following items before contact >
◆Model Name of Product
◆Production Number
◆Purchase Date
◆About Trouble (in detail as possible)
Minimum Retention Period of Performance Parts for Repair
The minimum retention period of performance parts for repair of this unit is 7 years after
discontinuance of this unit.
The "performance part for repair" is the part that is required to maintain this unit.
See the production plate attached to this unit.

17
Specification
Model
BS200
BS400
BS600
BS660
Performance
Operating temperature
range (*1)
Room temp.+5℃to boiling temp. (water)
Temperature
adjustment accuracy (*2)
±3℃(at70℃)
Temperature
distribution accuracy (*2)
±5℃(at70℃)
Time required to reach
highest temperature
Approx. 35min.
Approx. 60min.
Approx. 50min.
Configuration
In-bath material
Stainless steel
Temperature controller
ON/OFF control (Indication of heater lamp blinking)
Sensor
Liquid expansion method
Heater
Copper pipe heater (Nickel plated)
0.9KW
1.4KW
1.3KW
Safety device
Overheating (empty bath heating) prevention device (liquid expansion method, self
holding relay, alarm lamp lighting), Earth leakage breaker with OC (the lamp lights
when the power is ON)
Standard
Internal dimensions
(mm)
φ200×Depth149
Wid328×Dim302
×Depth99
Wid790×Dim150
×Depth102
Wid502×Dim302
×Depth99
Valid internal
dimensions (mm)
φ186×Depth115
Wid298×Dim260
×Depth64
Wid776×Dim140
×Depth73
Wid468×Dim260
×Depth66
External dimensions (*3)
(W×D×H mm)
300×364×216
390×438×214
864×288×215
565×437×214
In-bath capacity
Approx. 4.7L
Approx. 9L
Approx. 11L
Approx. 14L
Power supply
220V AC, 4.5A
220V AC, 6.5A
220V AC, 6A
Diameter/Number
of the opening
4pcs (*4)
φ115/4pcs
φ115/6pcs
Weight
Approx. 5Kg
Approx. 9.5Kg
Approx. 16Kg
Approx. 12Kg
Optional Accessories
Ring
None
φ57.5mm, 83mm
4pcs for each
φ57.5mm, 83mm
6pcs for each
Cover
4pcs
(φ96,72,56,40 mm)
4pcs (φ56 mm)
6pcs (φ56 mm)
Container mounting
clamp
1pc
Two mount×2pcs
6pcs
Two mount×3pcs
Pole
Large and small
1pc for each
2pcs
Horizontal rod
for the clamp
None
1pc
Connector
(for the pole)
1pc
2pcs
Thermometer
1pc (-10 to 110℃) line marking of im mersion level alcohol method
Shelf
1pc
1pc(275×270 mm)
1pc(790×145 mm)
1pc(440×265 mm)
Basket
(diameter×depth mm)
96×50, 96×50
56×40, 40×30
1pc for each
None
Instruction manual
1 copy
*1: This result is output with the bath itself in no load operation. Note that the maximum temperature differs depending on
the operating environment and operating condition.
*2: This performance is output with the room temperature 23℃±5℃, humidity 65％±20％, and rated power.
*3: No protrusion is included.
*4: With basket