Yamato IL702 User manual

Programmable Low Temperature
Constant-Temperature Chamber
Model IL702
Instruction Manual
First edition
●Thank you very much for purchasing this Yamato
IL702 programmable low temperature constant-
temperature chamber.
●Please read the “Operating Instructions” and
“Warranty” before operating this unit to assure proper
operation. After reading these documents, be sure to
store them securely together with the “Warranty” at a
handy place for future reference.
●For how to operate the product, refer to this operation
manual and that for the CR 5 Program Controller.
Warning: Before operating the unit, be sure to
read carefully and fully understand
important warnings in the operating
instructions.
Yamato Scientific Co., Ltd.
This paper has been printed on recycled paper.

Table of contents
1. Safety precautions ................................................................. 1
Explanation of pictograms ............................................................. 1
List of symbols ....................................................................... 2
Warning・Cautions ................................................................... 3
2. Before operating the unit ........................................................... 4
Precautions when installing the unit ..................................................... 4
Installation procedures/precautions...................................................... 7
3. Names and functions of parts ...................................................... 12
Main unit ........................................................................... 12
Operation panel ..................................................................... 13
4. Operating procedures ............................................................. 15
Operation modes and lists of functions.................................................. 15
Operating sequence (Overheat protector settings)........................................ 18
Operating sequence (Basic operation) .................................................. 19
Operating sequence (Example of program registration).................................... 24
Useful functions (Temperature output terminal)........................................... 26
Useful functions (RS485 communication function) ........................................ 28
5. Cautions on handling.............................................................. 42
6. Maintenance procedures........................................................... 44
Daily inspection/maintenance.......................................................... 44
7. When the unit is not to be used for a long time or when disposing ..................... 46
When the unit is not to be used for a long time or when disposing........................... 46
Notes about disposition............................................................... 46
8. Troubleshooting .................................................................. 47
Safety device and error codes ......................................................... 47
When a malfunction is suspected ...................................................... 48
9. After sales service and warranty.................................................... 49
When requesting a repair ............................................................. 49
10. Specifications ................................................................... 50
11. Wiring diagram .................................................................. 51
12. Replacement parts list............................................................ 52
13. List of dangerous materials ....................................................... 53
14. Standard installation manual ...................................................... 54

1
1. Safety precautions
Explanation of pictograms
About pictograms
A variety of pictograms are indicated in this operating instruction and on
products for safe operation. Possible results from improper operation
ignoring them are as follows.
Be sure to fully understand the descriptions below before proceeding to the
text.
Warning
Caution
Indicates a situation which may result in minor injury (Note 2) and
property damages (Note 3.)
（Note 1）Serious injury means a wound, an electrical shock, a bone fracture or intoxication that may
leave after effects or require hospitalization or outpatient visits for a long time.
（Note 2）Minor injury means a wound or an electrical shock that does not require hospitalization or
outpatient visits for a long time.
（Note 3）Property damage means damage to facilities, devices and buildings or other properties.
Meanings of pictograms
This pictogram indicates a matter that encourages the user to adhere to warning
(“caution”included).
Specific description of warning is indicated near this pictogram.
This pictogram indicates prohibitions
Specific prohibition is indicated near this pictogram.
This pictogram indicates matters that the user must perform
Specific instruction is indicated near this pictogram.
Indicates a situation which may result in death or serious injury (Note 1.)

2
1. Safety precautions
List of symbols
Warning
General warnings
Danger!: High
voltage
Danger!: High
temperature
Danger!: Moving
part
Danger!: Hazard
of explosion
Caution
General cautions
Electrical shock!
Burning!
Caution for no
liquid heating!
Caution for water
leak!
For water only
Poisonous
material
Prohibitions
General bans
Fire ban
Do not
disassemble
Do not touch
Compulsions
General
compulsions
Connect ground
wire
Install levelly
Pulloutthepower
plug
Regular
inspection

3
1. Safety precautions
Warning・Cautions
Warning
Never operate the unit in an atmosphere containing flammable or explosive gas
Never operate the unit in an atmosphere containing flammable or explosive gas.
Otherwise, an explosion or a fire may result since the unit is not explosion-proof.
See section “13. List of dangerous materials” on page 53.
Be sure to connect the ground wire.
Be sure to connect the ground wire correctly. Otherwise, electrical leak may result and cause an
electrical shock or a fire.
Ban on operation when an abnormality occurs
When a smoke or an unusual odor is seen or sensed, immediately turn the ELB on the main unit
off and pull out the power plug.Afire or an electrical shock may result.
Never use electrical power cords bundled.
When these are used bundled, they might overheat causing a fire.
Take care not to damage electrical power cords.
Avoid tightly bend, pull with a strong force or twist to prevent electrical power cords from
damaging.Afire or an electrical shock may result.
Never use an explosive or a flammable material with this unit.
Never use an explosive material, a flammable material or a material containing them. An
explosion or an electrical shock may result.
See section “13. List of dangerous materials” on page 53.
Never try to touch a hot part.
Some parts of the unit are hot during and immediately after operation. Take special care for
possible burning.
Never try to disassemble or alter the unit.
Never try to disassemble or alter the unit.Amalfunction, a fire or an electrical shock may result.
Caution
When a thunder is heard.
When a thunder is heard, turn the main power off immediately. A malfunction, fire or an electrical
shock may result.

4
2. Before operating the unit
Precautions when installing the unit
1. Carefully select an installation site.
Take special care not to install the unit at a place described below:
・Uneven surfaces or dirty surfaces
・Where flammable gas or corrosive gas exists
・Where the ambient temperature is 35℃or more
・Where temperature changes severely
・Where humidity is high
・Where subject to direct sunlight
・Where vibration is severe
Install this unit at a place with spaces shown below.
15cm
or
more
15cm
or
more
Front
15cm or more
1m or more
2. Install the unit on a level surface.
Install the unit on a level surface. If the whole bottom surface of the unit does not contact the
surface evenly, vibrations or noises may result. This might cause unexpected troubles or
malfunctions.
The unit weight is approx. 90 kg.
When lifting the unit for transportation and installation, carefully handle it by at least two
people.
3. Installation
The unit might fall down or move by an earthquake or an impact resulting a personal injury.
We recommend making safety measures such as to avoid installing the unit at a place other
than busy places.

5
2. Before operating the unit
Precautions when installing the unit
4. Secure sufficient ventilation for the unit.
Do not operate the unit when its side panels and vent holes are blocked.
Internal temperature of the unit will rise degrading the performance and an accident, a
malfunction or a fire may result.
5. Do not operate the unit at such a place that may subject to splash.
Do not operate the unit at such a place that may subject to splash. Liquid entering the inside
may cause an accident, a malfunction, an electrical shock or a fire.
6. Never operate the unit in an atmosphere containing flammable or explosive gas.
Never operate the unit in an atmosphere containing flammable or explosive gas. Since the
unit is not explosion-proof, an arc is discharged when switching the ELB “ON” and “OFF” and
during operation and a fire or an explosion may result.
See the section “13. List of dangerous materials” on page 53 for flammable and explosive
gases.
Flammable
gas
Explosive
gas

6
2. Before operating the unit
Precautions when installing the unit
7. Be sure to connect the power plug to the dedicated power distribution panel or
a wall outlet.
Use a power distribution panel or a wall outlet that meets the electrical capacity of the unit.
Electrical capacity:
IL702 AC220V 6A
＊When the unit will not start even when you turn the Electric Leakage Breaker to “ON”, check
for low main voltage or if the unit is connected to the same power supply line as other devices
and connect it to another line if necessary.
Avoid connecting too many devices using a branching outlet or extending a wire with a cord reel
or refrigerating function and temperature controlling function may degrade due to voltage drop.
Do not connect the unit to any parts or lines other than a correct power supply line such as a
gas pipe, a water pipe or a telephone line.
Otherwise, an accident or a malfunction may result.
8. Handling of a power cord
Never use electrical power cords bundled. When these are used bundled, they might
overheat causing a fire.
Do not convert, forcibly bend, twist or pull the power cord. Otherwise, a fire or an electrical
shock may result.
Do not place the power cord under a desk or a chair, or sand between objects to avoid it
from being damaged.
Otherwise, a fire or an electrical shock may result.
Do not place the power cord close to a stove or other heat generating device. Sheath of the
cord may burn and result in a fire or an electrical shock.
If the power cord should be damaged (exposure of core wire or disconnection), immediately
turn the ELB off, turn the power supply off and ask your dealer to replace the cord. If the
unit is operated with a damaged power cord, a fire or an electrical shock may result.
Connect the power cord to an appropriate wall outlet.
9. Be sure to connect the ground wire.
・When the unit has no ground terminal, class D grounding work is necessary and please
consult your dealer or our nearest sales office.
Do not connect the grounding wire to any parts or lines other than a correct grounding
terminal such as a gas pipe, a water pipe or a telephone line.
Otherwise, an accident or a malfunction may result.

7
2. Before operating the unit
Installation procedures/precautions
(1)
Transporting the product
・Two or more people are required for lifting and transporting the IL702 unit.
※Take care for protrusions on the unit when transporting it.
(2)
Installing the drain system
・Drain water generated from defrosting is stored in the drain pan at the left lower side on the
main unit to allow natural evaporation.
・The drain pan may not accept all water generated from defrosting, if too much frost has
generated during operation without defrosting. When frost to remove seems to be too
much, prepare a separate larger pan.
・Be sure to stop the unit before attaching or removing the drain pan.
・Be sure to empty the drain pan before moving the unit.
(3)
Attaching the manual holder
・Attach the manual holder included with the unit
as shown in the picture.
Hook the key hole shaped openings on the
holder onto the knurled screws on the right
side panel of the unit.
Store this operation manual and the manual
for CR5 Program Controller in this holder.
(4)
Install shelf boards.
・Install shelf pegs at heights you want on the right and left shelf posts in the internal bath of
the main body.
・Completely push shelf boards by sliding to the end.
*Take care to put each shelf board on correct pairs of right and left shelf pegs.
・Make sure that shelf boards will not fall nor rattle.
・Withstand load of each shelf board is 15 kg in even loading. When putting specimens,
arrange them as dispersed as possible.
Shelf board
Specimen
15kg

8
2. Before operating the unit
Installation procedures/precautions
・Put specimens with appropriate spaces between them. Too many specimens may prevent
proper temperature control. To assure proper temperature control, put specimens with a
space at least 30% of the shelf board area.
Assure at least 30% of space
(5)
Do not put an specimen on the bottom of the internal bath.
・Operating the unit with a specimen directly put on the bottom of the internal bath might
degrade its temperature characteristics. This also may cause corrosion, damage or rust of
the internal bath. Never put any specimen on the bottom surface.
・When putting specimens, take care not to allow them touching the wall on which the heater,
the sensor or other devices are installed. Put specimens on the shelf board included with
the unit.
(6)
Take special care for specimens including:
①Specimen that contains a flammable or explosive component.
・This unit is not explosion-proof. Never attempt to dry or process a specimen that contains
a flammable or explosive component.
②Corrosive specimen
・Take care for handling a corrosive specimen. Although SUS304 stainless steel is used for
major components of this unit, they might corrode if they are subject to strong acid. Also
note that packing may corrode with acid, alkaline substances, oil, or organic solvent.
③Specimen that contains much moisture
・While operating the unit at a lower temperature, cooling capacity of the evaporator may be
degraded and the set temperature may not be maintained due to too much frost on the
evaporator. When frost is confirmed through the frost observation window at the bottom
of the bath in the unit, perform defrosting.
④Operation with devices of higher heat load introduced
・By leading a power cable from the cable port, you can operated devices in the unit. Note,
however, that operation of devices with higher heat load will increase temperature in the
unit.
(7)
About two-tier stacking
・Use the special optional accessory to stack two units. Consult your dealer or one of our sales
offices for details.

9
2. Before operating the unit
Installation procedures/precautions
(8)
Handling the controller
・Using optional “remote control communication cable (product code:281397)”, “remote control
power unit (product code:281399)”, you can remove the control panel off the main unit and
remotely control an IL series controller.
・A “remote control panel stand (product code: 281398)”is also available for removed panel.
This stand is useful when the main unit is installed in a draft chamber or a clean room, or
when remotely controlling the main unit.
【Removing the control panel】
1) Make sure that the breaker is at [OFF].
2) Remove the knurled screws that secure the control
panel to the main unit. (Two points at the lower part)
3) Slowly slide the control panel upward.
4) Slowly remove the cable that connects between the
main unit and the control panel off the cable jack. The
cable is two-forked and has two jacks.
※Excess length of the cable is only about 10 cm
from the main unit.
Insert the optional communication cable and the
remote operation power cable to the appropriate
connectors.
Refer to the section “Remote Control Connection of
the Control Panel”of the “Operation manual for the
model CR5 Program Controller”.
DC5V power connector 3P
Connector for internal
communication 2P

10
2. Before operating the unit
Installation procedures/precautions
【How to install the control panel】
1) Make sure that the breaker is at [OFF].
2) Insert the cable from the main unit into one of the
jacks on the left side of the control panel. The jacks
on the panel are for DC5V remote operation power,
DC5V power 3 pin jack, and internal communication 2
pin jack beginning from the top.
※Excess length of the cable is only about 10 cm from
the main unit.
3) Hook the control panel to the brackets on the main
unit, then slowly slide the panel downward until it
stops.
4) After making sure that the control panel is securely
attached to the hooking brackets and connectors are
securely connected, install the knurled screws.
Make sure that the control panel has been completely
secured.
Cautions
・Use of the panel as a remote commander is an optional function and remove the control panel only
necessary.
・The weight of the control panel is about 1 kg. Take care not to drop it.
・Do not put the removed control panel with the front side down or do not put anything on the panel.
・The control panel is a high precision device. Take extreme care for handling.
・Take care not to lose the removed knurled screws.

11
2. Before operating the unit
Installation procedures/precautions
【How to connect remote control-related devices】
Optional accessories below will be necessary for remote
control.
Connection to the main unit is made from the external
output connector box on the front of the main unit.
+ -
DC power
terminal
DC5V
+ -
Internal
communication
terminal
【Combinations of options】
Option settings differ depending on the distance for remote control you want. See the list below
and consult one of our sales offices.
1）When the panel is installed on the unit （Control is not made remotely.）
No option settings are necessary.
2）Remote control is made with a cable of 5m or less in length.
Item name
Spec.
Remarks
Remote operation
communication cable
5m
Product code：281397
3）Remote control is made with a cable of 5m or more in length.
Item name
Spec.
Remarks
Remote operation
communication cable
Required length (m)
Contact our sales office.
Remote operation power
supply
DC5V
Product code：281399
External output connector box
Terminal block for
remote control

12
3. Names and functions of parts
Main unit
Front of IL702
Rear of IL702
Control panel
Temp. output/RS485 com. terminal
Alarm output terminal/remote
operation terminal
Breaker
Ventilation port
Door key
Cable port
Power cord
Manual holder
Rating sticker
Stand-alone overheat
protector

13
3. Names and functions of parts
Operation panel
FIXED TEMP.
PAUSE
AUTO
START
AUTO
STOP
PROGRAM
PAUSE
TEMP. SET
TIME SET
ENTER
CANCEL
TIMER
SET TEMP.
℃
MEASURED TEMP.
HR
MIN.
HEATER
TIME
CLOCK
CLOSED TIME
RUN
STOP
RETURN 2SEC
POWER
No.
Name
Operation／action
①
HEATER lamp
Lights when the heater is turned on.
②
HOUR lamp
Lights when the timer is set in hours.
③
TIME lamp
Lights when the timer is set in clock time.
④
REMAINING HOUR lamp
Lights when the Timer screen displays the remaining operation time.
⑤
RUN/STOP key
The key is used to start/stop specific operation.
⑥
POWER key
The key is used to turn on or off the power to the controller.
⑦
PROGRAM key
The key is used to select program operation.
⑧
AUTO STOP key
The key is used to select auto stop operation.
⑨
AUTO START key
The key is used to select auto start operation.
⑩
FIXED TEMP key
The key is used to select fixed temperature operation.
⑪
Measured Temperature Display
Screen
The screen displays the measured temperature and error numbers.
⑫
Operation Guide Screen
The screen describes status.
⑬
Set Temperature Display Screen
The screen displays the set temperature and parameter settings.
⑭
Timer Display Screen
The screen displays the set time and the remaining hours.
⑮
HOUR UNIT/MIN UNIT lamps
One of these comes on when the time setting is the hour or minute.
⑯
TEMP. SET/TIME SET(time)keys
The keys are used to set or change temperature and time for the fixed
temperature operation or program operation.
⑰
DIGIT SHIFT key
The key is used to shift a digit during setting.
⑱
▼▲ keys
The keys are used to increase/decrease settings.
⑲
CANCEL key
The key is used to go back to the previous parameter item or to clear
parameter settings.
⑳
ENTER key
The key is used to advance to the next parameter item or to determine a
parameter setting.
②
③
④
⑤
⑥
①
⑮
⑭
⑬
⑦
⑧
⑨
⑩
⑪
⑯
⑲
⑳
⑱
⑰

14
3. Names and functions of parts
Control panel
FIXED TEMP.
PAUSE
AUTO
START
AUTO
STOP
PROGRAM
PAUSE
TEMP. SET
TIME SET
ENTER
CANCEL
TIMER
SET TEMP.
℃
MEASURED TEMP.
HR
MIN.
HEATER
TIME
CLOCK
CLOSED TIME
RUN
STOP
RETURN-2SEC
REPEAT
SET
PROGRAM
STEP
PROGRAM
3～
PROGRAM
2
PROGRAM
1
GUIDE
FUNCTION
1・2
KEY
LOCK
RETUREN-2SEC
DEFROST
POWER
No.
Name
Operation／action
①
Repeat Display Screen
The screen displays repeat setting and the number of repetitions.
②
REPEAT SET key
The key is used to set repeat during program operation.
③
Step Display Screen
The screen displays the selected step and steps to be executed.
④
STEP key
The key is used to set steps for program operation.
⑤
PROGRAM 3 key
The key is used to select program 3.
⑥
PROGRAM 2 key
The key is used to select program 2.
⑦
PROGRAM 1 key
The key is used to select program 1.
⑧
FUNCTION 1/2 key
The key is used to set various functions of the controller.
⑨
LOCK key
The key is used to lock settings.
⑩
DEFROST key
The key is used for manual defrosting.
⑪
GUIDE key
The key is used to show guidance on the Operation Guide screen.
①
②
③
④
⑦
⑪
⑧
⑨
⑥
⑤
⑩

15
4. Operating procedures
Operation modes and lists of functions
There are six operation modes as shown below.
Refer to the separate “Operation Manual for the model CR5 Program Controller”for details.
№
Name
Function
1
Fixed Temp. operation
Controls temperature at a constant temperature.
2
Auto Stop operation
Stops operation at a set time.
3
Quick Auto Stop operation
Allows setting auto stop operation during fixed temperature
operation.
4
Auto Start operation
Starts operation at a set time.
5
Program operation
Performs program operation.
6
Program Auto Start operation
Starts program operation at a set time.
The function menu shows the following 16 functions (including when optional devices are installed).
Refer to the separate “Operation Manual for the model CR5 Program Controller”for details.
№
Name
Function
Functions of FUNCTION 1
1
Calendar/Time setting
You can set the dominical year, month, date and the current
time.
2
Time/Hour selection
You can select whether timer operation will be set in hours or in
time.
3
Buzzer setting
You can turn on or off sound of key operation, time up,
operation disabled and door open separately.
4
Heater output operation level
display
The heater output level in % can be continuously monitored.
5
Electricity/electric power
charge display
You can monitor the basic unit for electric power charge
calculation, electric power volume and charge for various units
from an hour to a year, total electric power charge, electric
power volume and charge for one cycle operation.
Functions of FUNCTION 2
6
Event output setting
The function is used to set the event output function during
program operation for each step.
7
Motor output setting
The function is used to set the pump power during operation.
8
Refrigerator output setting
The function is used to set the output of the refrigerator during
operation.
9
Temperature sensor switching
setting
The function is used to switch between the internal sensor and
an external sensor when an external circulating unit is used.
10
Calibration offset setting
The function is used to compensate a calibration offset
temperature.
11
External communication
setting
The function is used to set conditions for external
communication.
12
Power failure compensation
function setting
The function enables you to set whether to continue or hold the
operation after recovery from a power failure.
13
Wait function setting
The function is used to set a wait zone and a wait time. This
setting may not be different among different steps.
14
Accumulated time display
The display allows monitoring of accumulated time of operation
of the controller (unit).
15
Warning history display
The display allows monitoring of error information of 20
incidents in the past.
16
Refrigerator operation setting
The function is used to switch from continuous operation to
ON/OFF operation to improve defrosting performance.

16
4. Operating procedures
Operation modes and lists of functions
Defrosting function is built-in in this chamber as special function.
For details, refer to the separate Operation Manual for the Model CR5 Program Controller.
Name
Description
Defrost function
While operating the unit at a lower temperature, cooling capacity of
the evaporator may be degraded and the set temperature may not be
maintained due to too much frost on the evaporator.
The IL unit has an observation window to allow check how much frost
is on the evaporator. The speed in which frost is generated will differ
depending on specific conditions.
(1) Operating temp.:
Operation at a lower temperature is likely to cause frost.
(2) External temp./humidity:
Frost is likely to occur at a higher temperature and humidity.
(3) Inside the bath:
Frost is likely to occur when the humidity inside the bath is high.
(Such as when the specimen used contains much moisture.)
The IL unit allows selecting from the following operation modes to
prevent frosting depending on the use conditions.
This function can be enabled even during fixed temperature operation
by pressing the Defrost key.
Although it depends on use conditions, take care since the
temperature in the bath will rise compared to the set
temperature during defrost operation, which might influence
on specimens. In which case, the displayed temperature
may rise by 10℃or more.
(Increased margin of temperature will differ depending on
the set temperature, the specimen or the external
temperature.)
※Reference data: Temperature increase is within about 4℃
at the set temperature of 37 ℃and the external
temperature of 20℃.

17
4. Operating procedures
Operation modes and lists of functions
Refer to the separate “Operation Manual for the Model CR5 Program Controller”for details of
operations.
No.
Operations
Corresponding page in the operation
manual for the model CR5 Program
Controller.
1
Description of the Control Panel
P.1
2
Remote Control Connection of the Control Panel
P.4
3
Fixed Temperature Operation
P.10
4
Fixed Temperature Auto Stop Operation
P.11
5
Fixed Temperature QuickAuto Stop Operation
P.12
6
Fixed Temperature Auto Start Operation
P.13
7
Program Operation
P.14
8
ProgramAuto Start Operation
P.34
9
Program Step change Function
P.35
10
Lock Settings
P.40
11
Guide Function
P.42
12
Suspension Function
P.43
13
Program Pattern Registration Function
P.28
14
Program Pattern Assignment Function
P.25
15
Settings of FUNCTION 1
P.44
16
Settings of FUNCTION 2
P.50
17
Defrost Function
P.62