Yamato BA300 User manual

Constant Temperature Water Bath
Models
BA300/400/500/610/710
Instruction Manual
- Fourth Edition -
Yamato Scientific America Inc．
Santa Clara，CA
Printed on recycled paper
Thank you for choosing BA Series Constant
Temperature Water Baths from Yamato
Scientific Co., Ltd.
For proper equipment operation, please
read this instruction manual thoroughly
before use. Always keep equipment
documentation safe and close at hand for
convenient future reference.
WARNING:
Read instruction manual warnings and
cautions carefully and completely before
proceeding.

Contents
1. SAFETY PRECAUTIONS....................................................................1
Explanation of Safety Symbols ....................................................................................1
Symbol Glossary .........................................................................................................2
Warnings & Cautions...................................................................................................3
2. PRE-OPERATION PROCEDURES .....................................................4
Installation Precautions & Preparations .......................................................................4
3. COMPONENT NAMES AND FUNCTIONS..........................................7
Main Unit Overview......................................................................................................7
Control Panel...............................................................................................................8
Display Characters ......................................................................................................9
4. OPERATION PROCEDURES............................................................10
Operation Modes.......................................................................................................10
Operation Functions ..................................................................................................11
Mode & Function Flow...............................................................................................12
Overheat Prevention Device Setup............................................................................13
Constant (fixed) Temperature Mode...........................................................................14
Constant Temperature + Quick Auto Stop Mode ........................................................15
Auto Stop Mode.........................................................................................................16
Auto Start Mode.........................................................................................................18
Programmed Operation.............................................................................................20
Building Programs .....................................................................................................23
Program Planning Worksheet....................................................................................27
Calibration Offset Function ........................................................................................29
Keypad Lock Function...............................................................................................30
5. HANDLING PRECAUTIONS .............................................................31
6. MAINTENANCE PROCEDURES.......................................................33
7. STORAGE AND DISPOSAL..............................................................34
8. ERROR CODES ................................................................................35
9. TROUBLESHOOTING.......................................................................36
10. SERVICE AND REPAIR...................................................................37
11. SPECIFICATIONS ...........................................................................38
12. WIRING DIAGRAMS .......................................................................39
13. REPLACEMENT PARTS LIST ........................................................40
14. LIST OF HAZARDOUS SUBSTANCES ..........................................41

1
1. SAFETY PRECAUTIONS
Explanation of Safety Symbols
A Word Regarding Symbols
Various symbols are provided throughout this text and on equipment to
ensure safe operation. Failure to comprehend the operational hazards and
risks associated with these symbols may lead to adverse results as explained
below. Become thoroughly familiar with all symbols and their meanings by
carefully reading the following text regarding symbols before proceeding.
Warning
Caution
Signifies a situation which may result in minor injury (Note 2)
and/or property damage (Note 3)
(Note 1) Serious injury is defined as bodily wounds, electrocution, bone
breaks/fractures or poisoning, which may cause debilitation requiring
extended hospitalization and/or outpatient treatment.
(Note 2) Minor injury is defined as bodily wounds or electrocution, which will not
require extended hospitalization or outpatient treatment.
(Note 3) Property damage is defined as damage to facilities, equipment, buildings or
other property. （Note 1 ）Serious injury is defined as bodily wounds,
electrocution, bone breaks/fractures or poisoning which, may cause
debilitation requiring extended hospitalization and/or outpatient treatment
（Note 3）Property damage is defined as damage to facilities, equipment, buildings or
other property.
Symbol Meanings
Signifies warning or caution.
Specific explanation will follow symbol.
Signifies restriction.
Specific restrictions will follow symbol.
Signifies an action or actions which operator must undertake.
Specific instructions will follow symbol.
Signifies a situation which may result in serious
injury or death (Note 1)

2
1. SAFETY PRECAUTIONS
Symbol Glossary
Warning
General
Warning
Danger!:
High Voltage
Danger!:
Extremely Hot
Danger!:
Moving Parts
Danger!:
Blast Hazard
Caution
General Caution
Caution:
Electrical Shock
Hazard!
Caution: Burn
Hazard!
Caution: Do Not
Heat Without
Water!
Caution: May
Leak Water!
Caution: Water
Only
Caution: Toxic
Chemicals
Restriction
General
Restriction
No Open Flame
Do Not
Disassemble
Do Not Touch
Action
General Action
Required
Connect Ground
Wire
Level Installation
Required
DisconnectPower
Inspect Regularly

3
1. SAFETY PRECAUTIONS
Warnings & Cautions
WARNING!
Never operate equipment near combustible gases/fumes.
Do not install or operate BA series units near flammable or explosive gases/fumes. Unit is NOT fire or
blast resistant. Negligent use could cause a fire/explosion. See “List of Hazardous Substances” (P.41).
Always ground equipment.
Always ground this unit properly to avoid electric shock.
DO NOT operate equipment when abnormalities are detected.
If smoke or unusual odors begin emitting from unit, or if any other abnormalities are detected, terminate
operation immediately, turn off main power switch and disconnect power cable. Continued operation
under such conditions may result in fire or electric shock.
DO NOT operate equipment with bundled or tangled power cable.
Operating unit with the power cable bundled or otherwise tangled may cause power cable to overheat
and/or catch fire.
DO NOT damage power cable.
Damaging the power cable by forcibly bending, pulling or twisting may cause fire or electric shock to the
operator.
DO NOT process explosive or flammable substances.
Never place or process explosive/flammable substances, nor substances that contain
explosive/flammable substances in this unit. An explosion or fire may occur. See “List of Hazardous
Substances” (P.41).
DO NOT disassemble or modify equipment.
Attempting to dismantle or modify unit in any way, may cause malfunction, fire or electric shock.
Avoid touching hot surface areas.
Bath interior and some exterior surfaces become hot during operation and may remain hot following
operation. Avoid contacting these areas with bare fingers and hands. Burns or other injury may result.
CAUTION!
DO NOT operate equipment during thunderstorm.
In the event of a thunderstorm, terminate operation and turn off main power switch immediately. A direct
lightning strike may cause damage to equipment, or result in fire or electric shock.

4
2. PRE-OPERATION PROCEDURES
Installation Precautions & Preparations
WARNING!
1. Ground wire MUST be connected properly.
Ground wire must be connected to a proper grounding line or teminal in order to prevent
electric shock.
Never connect ground wire to gas lines or water pipes.
Never connect ground wire to telephone grounding lines or to lightning conductor rods. Fire or
electrical shock may result.
Never insert multiple plugs into a single outlet. Doing so may result in power cable
overheating, fire or drop in voltage
Always use a 220V dedicated power supply/outlet for the single-phase 220V All models.
2. Install in a location free of flammables and explosives.
Never install near flammables or explosives. This unit is NOT fire or blast resistant. Simply
switching the main power switch “ON” or “OFF” can produce a spark, which could be relayed
during operation, causing a fire or explosion when near flammable or explosive fluids,
chemicals or gases/fumes. See “List of Hazardous Substances”(P.41).

5
2. PRE-OPERATION PROCEDURES
Installation Precautions & Preparations
3. Choose an appropriate installation site.
DO NOT install unit:
where flammable or corrosive gases/fumes will be generated.
where ambient temperature will exceed 35ºC, will fall below 5ºC or will fluctuate.
in excessively humid or dusty locations.
where there is constant vibration.
where power supply is erratic.
in direct sunlight or outdoors.
where there is no exhaust/ventilation hood.
Install BA series unit in a location with sufficient space, as specified as below.
4. DO NOT disassemble or modify.
Never attempt to disassemble or modify BA units. Doing so may cause equipment malfunction,
fire or electric shock.
5. Place on a flat surface.
Install unit on a flat and level surface. Failure to do so may cause abnormal vibrations or noise,
resulting in possible complications and/or malfunction. Level off unit, if needed, using
adjustable feet.

6
2. PRE-OPERATION PROCEDURES
Installation Precautions & Preparations
CAUTION!
6. Connect to an appropriate power source.
Use a dedicated power supply that matches electrical capacity of unit.
Power capacity:
BA300: AC220 V (Single phase), 6.5A
BA400: AC220 V (Single phase), 10.5A
BA500: AC220 V (Single phase), 11.5A
BA610: AC220 V (Single phase), 16A
BA710: AC220 V (Single phase), 20.5A
NOTE)
In the unlikely event that unit does not run after turning power ON, inspect whether power
supply voltage of the main power is lower than specified, or whether other device(s) are
sharing the same supply or line. Change to a dedicated power supply if unit will not run due
to low voltage or shared power supply line.
7. Install equipment out of harm’s way.
Unit may fall or shift in an earthquake or other unforeseen incident, resulting in personal injury.
Taking appropriate safety measures and installing unit out of harm’s way is strongly
recommended.
8. Handle power cable with care.
Never operate unit with power cable bundled or tangled; and do not modifiy, bend, forcibly
twist or pull on power cable. Doing so may cause fire and/or electrical shock.
Do not risk damage to power cable by positioning it under desks or chairs, or by pinching it
between objects. Doing so may cause fire and/or electrical shock.
Do not place power cable near kerosene/electric heaters or other heat-generating devices.
Doing so may cause power cable insulation to overheat, melt and/or catch fire, which may
result in electric shock.
Turn off power switch immediately and disconnect from facility terminal or outlet, if power
cable becomes partially severed or damaged in any way. Failure to do so may result in fire or
electric shock.
Contact a local dealer or Yamato sales office for information about replacing power cable if it is
damaged.
Always connect power cable to appropriate facility outlet or terminal.

7
3. COMPONENT NAMES AND FUNCTIONS
Main Unit Overview
のみ
Power cord
Power cord (BA300)
Drainage hose
Rating badge

8
3. COMPONENT NAMES AND FUNCTIONS
Control Panel
No.
Panel Item
Description
1
START/STOP Key
Press to start or stop an operation.
2
Up/Down Arrow Keys
Press repeatedly to increase or decrease setting value incrementally.
Press and hold to increase or decrease setting value perpetually.
3
ENTER Key
Press to finalize setting.
4
FIXED TEMP Key
Press to select FIXED TEMPERATURE mode.
5
TIMER Key
Press to select timed operation. Quick Auto Stop, Auto Stop or Auto Start
modes may be selected.
6
PROGRAM Key
Press to select programmed operation.
7
SUBMENU Key
Press to enter overheat prevention temp setting, calibration offset, keypad
lock, and program repeat menus.
8
HEATER Indicator Lamp
Illuminates when heater is on and drawing power.
9
ALARM Indicator Lamp
Illuminates when an error occurs (accompanying alarm tone sounds).
10
AUTO STOP Indicator
Lamp
Illuminates while Auto Stop operation is in progress. Flashes while setting
Quick Auto Stop or Auto Stop modes.
11
AUTO START Indicator
Lamp
Illuminates while Auto Start operation is in progress. Flashes while setting.
12
FIXED TEMP Indicator
Lamp
Illuminates while Fixed Temperature operation is in progress. Flashes while
setting.
13
PROGRAM Indicator Lamp
Illuminates while Programmed operation is in progress. Flashes while setting.
14
Main Display
Shows current chamber temperature, setting characters and error information.
15
Sub Display
Shows temperature setting and remaining time.
16
Overheat Prevention
Display
Shows overheat prevention temperature limit setting.

9
3. COMPONENT NAMES AND FUNCTIONS
Display Characters
Character
Identifier
Description
Purpose
Fix
Signifies constant
temperature
setting mode
Appears while entering settings for
constant temperature operation.
Sv
Signifies temperature
setting mode
Appears while entering temperature
settings.
AStP
Signifies auto stop and
quick auto stop setting
mode
Appears while entering settings for
quick auto stop or auto stop mode.
AStr
Signifies auto start
setting mode
Appears while entering settings for
auto start mode.
tim
Signifies timer setting
mode
Appears while entering timer settings.
PrG3
Signifies which program
is being set
Appears when selecting which
program to use (1, 2 or 3) See
“Programmed Operation” (P.20)
PAt
Signifies program
pattern
Appears when selecting a program
pattern. See “Programmed Operation”
(P.20)
End
Signifies end of a timed
operation
Appears when a timed operation is
completed. See pgs. 15~17
Sv-1
Signifies which step
temperature is being set
Appears while setting temperature for
each step in a program. (Sv-1 to
Sv-30)
t-1
Signifies which step
timer is being set
Appears while setting timer for each
step in a program. (t-1 to t-30)
PS-3
Signifies what step is to
be repeated
Appears when selecting step
numbers to be repeated in a program.
See “Pattern Repeat Function” (P.26)
Pc-2
Signifies number of
times to repeat
Appears when setting the number of
times to repeat steps in a program.
See “Pattern Repeat Function” (P.26)
cAL
Signifies calibration
offset setting mode
Appears while entering offset
temperature values. See “Calibration
Offset Function”(P.29)
oH
Signifies overheat
prevention setting mode
Appears while setting activation
temperature for overheat prevention
device. See “Overheat Prevention
Device Setup”(P.13)
Lock
Signifies that keypad is
locked
Appears while control panel keypad is
locked. See “Keypad Lock Function”
(P.30)

10
4. OPERATION PROCEDURES
Operation Modes
Operation modes for this unit are defined in the table below:
No.
Name
Description
Page
1.
Constant Temperature
Mode (Continuous
Operation)
Pressing the FIXED TEMP key brings up constant temperature
setup mode.
The "▲▼" keys are used to set temperature.
Pressing the RUN/STOP key initiates or terminates operation.
14
2.
Quick Auto Stop Mode
This mode is used to automatically terminate an operation
when a specified time period has passed (decided during
operation). This is done by pressing the TIMER key at any time
during constant temperature operation.
The "▲▼" keys are used to set the timer.
Pressing the RUN/STOP key begins operation in quick auto
stop mode, activates the timer (once temp setting is reached)
and automatically terminates operation when timer reaches
0:00.
16
3.
Auto Stop Mode
This mode is used to automatically terminate an operation
when a specified time period has passed (decided before
operation).
Pressing the TIMER key displays "AStp".
The temperature (Sv) is set by pressing the ENTER key.
The operation time (tim) is set by pressing ENTER again.
Pressing the RUN/STOP key begins operation in auto stop
mode. Operation automatically terminates when timer reaches
0:00.
16
4.
Auto Start Mode
This operation is used to automatically begin an operation after
a specified period has passed.
Pressing the TIMER key displays "AStr".
The temperature (SV) is set by pressing the ENTER key.
The operation time (tim) is set by pressing ENTER again.
Pressing the RUN/STOP key begins operation in auto start
mode.
18
5.
Programmed Operation
This operation is used to run a combination of modes, times
and temperatures as one operation.
Pressing the PROGRAM key displays "PrG1".
Press it again to select program mode.
Press the ENTER key to select the pattern (Pat). Press the
ENTER key to display "End". Enter the number of patterns to
be used.
Enter step temperatures and step times for "Sv_x" and "t_x"
respectively (where “x”stands for a number or value).
20
NOTE) It is not possible to change modes during operation. If a mode change is required, operation must be
terminated and a new mode of operation must be set.

11
4. OPERATION PROCEDURES
Operation Functions
Operation functions for this unit are defined in the table below:
№
Name
Description
Page
1
Overheat
prevention
Auto
overheat
prevention
This function is set to automatically activate (auto reset)
when chamber temperature exceeds the temperature
setting by 6°C.
13
Overheat
prevention
device
Although this device uses the same power source,
display, and keypad as the control panel, it has an
independent temperature monitoring circuit, CPU, sensor
and output circuit. An overheat prevention temperature
can be manually specified using the control panel.
Unit operation is terminated when device is activated.
Operation may be restarted when the main power (ELB)
is switched off (wait 5 seconds), then back on again
(manual reset).
2
Calibration offset
Calibration offset function is to compensate for differences
in the temperature reading (as taken by unit sensor) and
actual chamber temperature (as taken manually with a
thermograph). Unit can be offset to either the positive or
negative side of temperature line for entire temperature
range of unit
29
3
Overheat prevention
temperature calibration
function
The temperature specified for the overheat prevention
device is automatically recalibrated when temperature
reading is corrected with the calibration offset function.
－
4
Power failure recovery
Unit can begin operation again with the same settings (in
memory) as before the power failure occurred. Simply
press the START/STOP key to begin the operation over
from the beginning.
－
5
Keypad lock
This function locks all keys (except SUBMENU and
START/STOP) during operation.
Lock function is set or cancelled using the SUBMENU key.
30

12
4. OPERATION PROCEDURES
Mode & Function Flow
The following chart illustrates mode and function flow for BA series units.

13
4. OPERATION PROCEDURES
Overheat Prevention Device Setup
This unit features an overheat prevention device (manual reset) which, has an independent temperature
monitoring circuit, CPU, sensor and output circuit, but uses the same power source, display, and keys as the
control panel. This is in addition to the internal automatic overheat prevention function (auto reset), built in for
added measure against overheating.
The automatic overheat prevention function (auto reset) is integrated internally into the unit and is set to
automatically activate (cutting off power to heater) when chamber temperature exceeds temperature setting on
control panel by 6°C. Function is released (automatically) when temperature returns to 5.9°C or below. These
parameters are set at the factory and cannot be modified.
Setting range/function
The overheat prevention device temperature setting range is from 0°C to 50°C beyond the maximum
temperature setting for BA series units.
When chamber temperature exceeds objective temperature setting and reaches that of the overheat prevention
device, the circuit is shut off and error code "Er19" is shown flashing in the control panel display, accompanied
by a sounding alarm.
Once activated,"Er19" continues to be displayed until main power switch (ELB) is turned off (wait 5 seconds)
then back on.
Setting temperature for
overheat prevention
1. Turn on main power switch (ELB).
Default values are displayed for about four seconds.
Turn on power. Displays will show initial settings. Current
chamber temperature (top), main temperature setting (center)
and temperature setting for overheat prevention device
(bottom) will show in respective displays.
2. Set temperature for overheat prevention
①Press the SUBMENU key.
②Press ▼▲ several times until shows in the top
display.
③Press the ENTER key. The temperature setting will be
shown flashing in center display.
Note: To prevent false errors, set the value 10°C or more above the
main temperature setting.
④Select value using the ▼▲ keys and press the ENTER key.
Setting value will show in the bottom display. This completes
the setting.
⑤Press ENTER
CAUTION
①The standard setting temperature of device is “maximum unit temperature setting of plus 10°C” or
“temperature setting plus 10°C”. If unit performs poorly, increase by 5°C more.
Note that improper temperature settings may cause malfunction resulting in equipment damage or
fire. Always use appropriate temperature settings.
The factory default setting for overheat prevention device is 90°C. Do not attempt to set
value higher.
②Overheat prevention device is designed to protect unit against overheating, not to protect test
samples against damage caused by overheating, nor to protect against injury or death resulting
from negligence from processing explosives, inflammables or other hazardous substances in this
unit.
①
②
③
④
⑤

14
4. OPERATION PROCEDURES
Constant (fixed) Temperature Mode
Constant
temperature
operation procedure
1. Turn on the main power switch (ELB)
Default values are displayed for about four seconds after turning
on power. Initial settings will then show in respective displays.
Temperature monitoring display:
Shows current temperature in the chamber and other setting information.
Main temperature setting display:
Shows temperature setting and other setting information.
Overheat prevention display:
Displays the temperature setting of overheat prevention device.
(For more on mode and setting characters, see “Display Characters”, P.12)
2. Select operation mode
Press the FIXED TEMP key to display , indicating
constant or “FIX” temperature mode, in center display.
3. Set temperature
Center display shows , indicating temperature can be set.
Current temperature will flash in top display. FIXED TEMP lamp
also flashes.
Set temperature using the ▼▲ keys.
4. Start operation
Press the START/STOP key for about one second. Unit will
begin operation and FIXED TEMP lamp will change from flashing
to constant to indicating that unit is currently operating in constant
temperature mode.
5. Stop operation
Press the START/STOP key for about one second. Operation
will stop (terminate) and the FIXED TEMP lamp will go out. Control
panel reverts to initial settings screen.
Editing or confirming
settings.
Press the FIXED TEMP key again to edit or confirm settings.
Changing the temperature setting during operation is also possible
using the FIXED TEMP key. When setting changes have been
made, press the ENTER key to finish.

15
4. OPERATION PROCEDURES
Constant Temperature + Quick Auto Stop Mode
Quick auto stop
operation procedure
This mode is used to specify when unit should terminate constant
temperature operation. This mode is set during operation only.
1. Set timer during constant temperature operation
Confirm that unit is operating by confirming that FIXED TEMP
lamp is illuminated.
Press the TIMER key.
Top display will show , indicating that the timer can be set.
Current timer setting will flash in center display.
Set the timer using the ▼▲ keys.
Timer function:
Maximum value for timer is "999 hours and 50 minutes ".
The time can be set in increments of one minute, under 99 hours
and 59 minutes.
Setting increments are 10 minutes, after 100 hours.
When ▼▲ keys are held down, values advance perpetually.
Press repeatedly for incremental adjustment.
2. Start quick auto stop operation
Press the START/STOP key for about one second after setting
timer.
FIXED TEMP and AUTO STOP lamps will illuminate, indicating
quick auto stop operation mode has started.
To manually stop/terminate quick auto stop operation
Operation stops automatically when timer reaches 0.00, and an
accompanying alarm sounds for approximately five seconds after
operation terminates.
Center display will show , indicating end of operation, with
FIXED TEMP and AUTO STOP lamps illuminated. Press
START/STOP key to at any time during operation or after
operation ends, to terminate quick auto stop operation mode.
Displays will return to initial settings screen.
Editing or
confirming settings
Changing Temperature during operation is possible by pressing the
FIXED TEMP key. Press the ENTER key after changing temperature
setting.
Changing the timer setting during operation can be done without
terminating operation, simply by pressing the TIMER key. Note that
this will require adding additional time to the elapsed time. Press the
START/STOP key when changes have been entered, as desired.
Press the ▼key at any time thereafter to see temperature setting,
operation mode and remaining time in the center display.

16
4. OPERATION PROCEDURES
Auto Stop Mode
Auto stop operation
procedure
This mode is used to specify when unit should terminate constant
temperature operation. In contrast to quick auto stop mode, this
mode must be set before operation.
1. Set stop time
①Press the TIMER key from the initial settings screen.
②Mode used in the previous session will be shown in the center
display. Press the TIMER key again and center display will
begin flashing. Use TIMER key to select , signifying
auto stop operation, then press the ENTER key.
③Top display will show , indicating that temperature can
be set. Current temperature setting flashes in center display.
AUTO STOP lamp also flashes.
④Set temperature using ▼▲ keys.
⑤Press the ENTER key again.
Top display will show , indicating that timer can be set.
Current timer setting will flash in center display.
⑥Set timer using the ▼▲ keys.
Timer function:
Maximum setting for timer is "999 hours and 50 minutes ".
The time can be set in increments of one minute, under 99 hours
and 59 minutes.
Setting increments are 10 minutes, after 100 hours.
When the ▼▲ keys are held down, values advance perpetually.
Press repeatedly for incremental adjustment.
2. Start auto stop operation
Press the START/STOP key for about one second after setting
timer.
AUTO STOP and HEATER lamp illuminate, indicating auto stop
operation mode has started.
Timer begins counting down when chamber temperature reaches
objective temperature.
①
②
③
④

17
4. OPERATION PROCEDURES
Auto Stop Mode
To stop/terminate auto stop operation manually
Operation stops automatically when timer reaches 0.00. An
accompanying alarm sounds for approximately five seconds after
operation terminates.
Center display shows , indicating end of operation, with
AUTO STOP lamps illuminated. Press the START/STOP key at any
time during operation or after operation ends, to terminate auto stop
operation mode. Displays will return to initial settings screen.
Editing or
confirming settings
Changing temperature setting or timer setting during operation can be
done by pressing the TIMER key. Use the ▼▲ keys to change the
setting values. Press the ENTER key when changes have been
entered as desired.
Press the ▼key at any time thereafter to see temperature setting,
operation mode and remaining time in the center display.
Note: Remaining time may be seen (center display) with
decimal point constant as an indicator that unit is in wait status while
temperature rises or falls toward an objective temperature. When
decimal point begins flashing, timer is counting down.