Yamato BK300 User manual

Constant Temperature Water Bath
Model
BK300/400/500/610/710
Instruction Manual
-First Edition -
Yamato Scientific Co. LTD.
lThank you for purchasing " Constant Temperature
Water Bath, BK Series" of Yamato Scientific Co.,
Ltd.
lTo 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
uCautions in Using with Safety...................................................................1
•Explanation ......................................................................................................................1
•Table of Illustrated Symbols.............................................................................................2
•Fundamental Matters of “WARNING!” and “CAUTION!”.................................................3
uBefore Using this unit................................................................................4
•Requirements for Installation...........................................................................................4
uDescription and Function of Each Part...................................................7
•Main Unit..........................................................................................................................7
•Control Panel ...................................................................................................................8
•Characters of Thermo Controller.....................................................................................9
uOperation Method.................................................................................... 10
•Operation Mode and Function List................................................................................10
•Operation Mode, Function Setting Key, and Characters...............................................11
•Fixed Temperature Operation........................................................................................12
•Quick Auto Stop Operation ............................................................................................14
•Auto Start Operation ......................................................................................................18
•Overheating Prevention Device.....................................................................................20
•Calibration Offset Function............................................................................................21
uHandling Precautions.............................................................................. 22
uMaintenance Method............................................................................... 24
•Daily Inspection and Maintenance.................................................................................24
uLong storage and disposal..................................................................... 25
•When not using this unit for long term / When disposing..............................................25
uIn the Event of Failure…......................................................................... 26
•Error Display..................................................................................................................26
uAfter Service and Warranty .................................................................... 28
uSpecification............................................................................................. 29
uWiring Diagram......................................................................................... 30
uReplacement Parts Table ........................................................................ 31
uReference.................................................................................................. 32
•List of Dangerous Substances.......................................................................................32

1
Cautions in Using with Safety
Explanation
MEANING OF ILLUSTRATED SYMBOLS
Various symbols are used in this safety manual in order to use the unit without
danger of injury and damage of the unit. A list of problems caused by ignoring
the warnings and improper handling is divided as shown below.Be sure that you
understand the warnings and cautions in 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,
disconnect the
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 page32 “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.
Do not touch high-temperature parts
The inside of the body or the door may become hot during and just after operation. It may cause burns.
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.
•Though BK400/500 model is the 100V single phase model, these two models have the large
electric capacity. Be sure to prepare the power switchboard with the specific grand earth or
specific receptacle.
•BK610/710 model is the 200V single phase mode. Be sure to connect this model to the
specific power switchboard or receptacle for 200V.
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. This unit should be installed
horizontally by using adjusters on the four corners.
Main Unit
More than
20cm
More than
20cm
More than 20cm
Front side

5
Before Using this unit
Requirements for Installation
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.
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
(BK610/710 has 6 legs) contacted to the setting place surface evenly could cause the vibration
or noise, or 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: BK300: AC100 V, 14A
BK400: AC100 V, 23A
BK500: AC100 V, 25A
BK610: AC200 V (Single phase), 19A
BK710: AC200 V (Single phase), 25A
NOTE)
There could be the case that the unit does not run even after turning ON the power. Inspect
whether the voltage of the main power is lowered than the specified value, or whether other
device(s) uses the same power line of this unit. If the phenomena might be found, change the
power line of this unit to the other power line.
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.
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 outlet which is supplied appropriate power and voltage.

7
Description and Function of Each Part
Main Unit
Clamp
Support rod
Shelf
Heater
Control panel
Rubber leg
Power switch
(Earth leakage breaker)
Front view
Rear view
Power cord
Power cord (BK300) Drainage hose
Production plate

8
Description and Function of Each Part
Control Panel
① Start/Stop Key：Starts/stops the operation.
② ▲▼ Key：Uses for rising UP/lowering DOWN the setting value.
③ Menu/Enter Key：Changes the setting item, or setteles the inputed value.
④ Heater Lamp：Displays the heater status.
The heater is not at work: Lights off
The heater is at work: Lights up
⑤ Alarm Lamp：Displays the alarm occurred status.
Not occurred the alarm: Lights off
Occurred the alarm: Lights up (and the buzzer sounds)
⑥ Timer Lamp：Displays the timer status.
Stop the operation: Lights off
Not set the timer: Lights off
Timer under running status during operation: Blinks
Timer ended running during operation: Lights up
⑦
Measurement Temperature
Display Unit：Displays the measured temperature, setting character, alarm information.
⑧
Setting Temperature
Display Unit：Displays the setting temperature, setteing value for timer mode,
remaining time.
⑨
Overheating Prevention
Setting Temperature
Display Unit：
Displays the setting temperature for overheating prevention
device.
⑦
⑧
⑨
①
④
⑤
⑥
③
②