Yamato Scientific IQ821 User Manual

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Page 1

Programmable

Low Temperature Incubator

Model

IQ821

Instruction Manual

- First Edition -

z Thank you for purchasing "Programmable Low

Temperature Incubator, IQ820" of Yamato Scientific Co., Ltd.

z 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 usin

this unit.

Yamato Scientific Co. LTD.

Page 2

Page 3

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

•

Defrost in Refrigerator................................................................................................... 8

 Description and Function of Each Part.................................................9

Main Unit.......................................................................................................................9

•

Control Panel...............................................................................................................10

•

Defrost Control Panel.................................................................................................. 11

•

Characters of the Controller........................................................................................ 12

 Operation Method .................................................................................13

• Operation Mode and Function List.............................................................................. 13

•

Operation Mode, Function Setting Key, and Characters.............................................15

•

Setting of Overheating Prevention Device ..................................................................16

•

Fixed Temperature Operation...................................................................................... 17

•

Quick Auto Stop Operation.......................................................................................... 18

•

Auto Stop Operation.................................................................................................... 19

•

Auto Start Operation.................................................................................................... 21

•

Program Operation......................................................................................................23

•

Other Functions........................................................................................................... 30

 Handling Precautions ...........................................................................31

 Maintenance Method.............................................................................33

Daily Inspection and Maintenance ..............................................................................33

•

 Long storage and disposal...................................................................34

When not using this unit for long term / When disposing............................................34

•

 In the Event of Failure….......................................................................35

Safety Device and Error Code..................................................................................... 35

•

Trouble Shooting......................................................................................................... 36

 After Service and Warranty ..................................................................37

 Specification..........................................................................................38

 Wiring Diagram......................................................................................40

 Replacement Parts Table......................................................................41

 Reference...............................................................................................42

• List of Dangerous Substances ....................................................................................42

Page 4

Page 5

Explanation

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.

Cautions in Using with Safety

MEANING OF ILLUSTRATED SYMBOLS

WARNING! CAUTION!

If the warning is ignored, there is the danger of a problem that may cause a serious accident or even fatality.

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.

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Table of Illustrated Symbols

Warning

Cautions in Using with Safety

Warning, generally

Caution

Caution,

generally

Caution,

water only

Warning,

high voltage

Caution,

electrical shock

Caution,

deadly poison

Warning,

high temperature

Caution,

Warning,

drive train

Caution,

scald

no road heating

Warning,

explosive

Caution,

not to drench

Prohibit

Prohibit,

generally

Compulsion

Compulsion,

generally

inflammable

Compulsion,

connect to the

Prohibit,

grounding

terminal

to disassemble

Compulsion,

install on a flat

Prohibit,

surface

Prohibit,

to touch

Compulsion,

disconnect the

power plug

Compulsion,

periodical

inspection

Page 7

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 page 42 "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. (Refer to page 42 "List of Dangerous Substances".)

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.

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Requirements for Installation

Before Using this unit

WARNING!

1. Always ground this unit

• Be sure to connect the earth wire (the green cable of power cord) to the grounding conductor or ground terminal to prevent accidents caused by electric leakage.

• Please consult your local electrical contractor for power connecting work.

• Do not connect the earth wire to gas or water pipes. If not, fire disaster may be caused.

• Do not connect the earth wire to the ground for telephone wire or lightning conductor. If not,

fire disaster or electric shock may be caused.

Rounded terminal

for M5

Green (to ground) Black (to power supply) White (to power supply)

 The power plug is not equipped with this

unit. Connect the ground wire correctly adjusting to the status of the power supply equipment side to be connected.

2. Connect the power cord paying attention to the color of each core wire

• When connecting the power cord, do check the breaker on the electric power equipment be "OFF". Note that IQ821 does not equip with the power plug. Select and connect the appropriate plug or terminal corresponding to the power capacity that is adjusted to the status of

Core Wire Color Interior Wiring

Black Power Supply Side White Power Supply Side

Green Ground Wire Side

the power supply equipment side.

3. Choose a proper place for installation 4. Caution at defrost

• 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.

• Catch drain from drain hose with a tray

at defrost.

Drain hose

• Install this unit on a stable place with the space as shown below.

More than 15cm

More than

15cm

Main Unit

Front side

More than

15cm

Note: The tray is not included in the attachments of

unit.

Tray

Page 9

Before Using this unit

Requirements for Installation

5. Do not use this unit in an area where there is flammable or explosive gas

(Refer to page 42 "List of Dangerous Substances".)

• 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.

爆発性ガス

可燃性ガス

• Never use explosive substances, flammable substances and substances that include explosive or flammable ingredients in this unit. Explosion or fire may occur.

爆発性物質

Explosive

substance

Flammable

substance

可燃性物質

Page 10

Before Using this unit

Requirements for Installation

6. Do not modify 7. Installation on horizontal surface

• Modification of this unit is strictly prohibited. This could cause a failure.

Modification

改造

• Set this unit to the flattest place. Setting this unit on rough or slope place could cause the vibration or noise, or cause the unexpectible trouble or malfunction.

8. Do not make an overload 9. Do not set samples in close formation

• The withstand load of shelf is 15kg

（uniform load）Set the samples apart each other.

Samples

15Kg

Shelf

• The temperature in furnace cannot be controlled if too much samples are set there. Make sure to use the shelf and set samples apart each other so as to make the free space of 30% or more to the furnace to acquire accuracy of temperature.

Make the free space of 30% or more

Page 11

Requirements for Installation

Before Using this unit

CAUTION!

10. 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:

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.

IQ821: 100V AC, 20A

11. 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.

12. 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.

13. Notes for some kind of sample

• Stainless steel is used for interior; however, it may be corroded by strong acid etc. And the door packing made of rubber may be corroded by some kind of solvent, e.g. alkaline, oil, halogen etc.

• Much frost on the evaporator degrades the refrigeration capability, which may cause uncontrollability of setting temperature. Be careful, especially, to treat samples with large water content that generate much frost. Perform the defrost operation if frost is observed through the frost inspection window.

• The equipment with large heat load cannot be used because the temperature in furnace increases.

Page 12

Before Using this unit

Defrost in Refrigerator

Much frost on the evaporator degrades the refrigeration capability, which may cause uncontrollability of setting temperature. In the IQ821, the condition of frost on the evaporator can be checked through the frost inspection window inside furnace. The frosting speed varies depending on the following conditions.

1) Temperature used･･････････････Easily frosted when using the unit in low temperature

2) External temperature/humidity･･･Easily frosted when external temperature/humidity is higher

3) Sample in furnace･･････････････Easily frosted when sample contains much water

The following operations can be set to take measure against frosting in the IQ821. Set either of them depending on the situation. The fixed temperature and program operation are available there by pressing the DEFROST key on the defrost control panel, in addition to the program operation.

① Manual defrost operation (manual start/automatic stop):

Perform the defrost operation if much frost is in the evaporator. The operation is started manually and stopped automatically with the built-in timer after 5-minute operation.

→Refer to the page 11 for the operating instructions.

② Cycle defrost operation (Automatic start/stop):

In the case of operating the unit for a long term, it is available to set the cycle defrost operation. Both approx. 5-minute operation and 23-hour-and-55-minute stop are repeated automatically. →Refer to the page 11 for the operating instructions.

CAUTION!

• The temperature in furnace increases about 3℃ at the defrost operation. Be careful if it affects the samples. The indicated temperature may increase more than 10℃ at that time. (The increasing temperature is depending on the setting temperature, sample, and air temperature.)

Compensation Operation for Power Failure

• In the case of occurring the power failure during operation, the unit restarts the operation from just the status that the power is turned OFF.

• The unit memorizes the remaining timing every one minute after starting the operation.

Page 13

Main Unit

Front view

Control panel

Description and Function of Each Part

Defrost control panel

Lock unit (Upper)

Control panel

Lock unit (Lower)

Rear view

(for upper and lower)

Drain hoses

Caster with adjuster

Page 14

Control Panel

⑧ ⑨ ⑩ ⑪

Description and Function of Each Part

⑰

⑭

⑮

⑫

⑯

⑬

③

①

②

④ ⑤

No. Name Function

① START/STOP Key： ② ▲▼ Key： ③ ENTER Key： ④ FIXED TEMP Key： ⑤ TIMER Key：

⑥ PROGRAM Key： ⑦ SUBMENU Key：

Starts/stops the operation.

Uses for rising UP/lowering DOWN the setting value.

Settles the inputted value.

Chooses the fixed temperature operation.

Chooses the timer operation (Quick Auto Stop/Auto Stop/Auto Start).

Chooses the program operation or program creation mode.

Uses for setting the overheating prevention temperature, calibration offset temperature, key lock function, or program repeat function.

⑦ ⑥

⑧ HEATER Lamp： ⑨ ALARM Lamp： ⑩ AUTO STOP Lamp：

⑪ AUTO START Lamp：

⑫ FIXED TEMP Lamp：

⑬ PROGRAM Lamp：

Measurement Temperature

⑭

Display： Setting Temperature

⑮

Display： Overheating Prevention

⑯

Temperature Display：

⑰ Refrigerator Lamp：

Lights while the heater works.

Lights up when an error occurs. (Buzzer sounds simultaneously.)

Blinks while setting quick auto stop timer or auto stop timer. Lights while quick auto stop timer or auto stop timer is running.

Blinks while setting auto start timer. Lights while auto start timer is running.

Blinks while setting fixed temperature operation. Lights while fixed temperature operation is running.

Blinks while setting program operation. Lights while program operation is running.

Displays the measured temperature, setting character, alarm information.

Displays the setting temperature, setting value for timer mode, remaining time.

Displays the setting temperature for overheating prevention device.

Lights while the refrigerator works.

Page 15

⑧

③ ① ② ⑤⑥⑦

④

Defrost Control Panel

Description and Function of Each Part

No.

MANUAL

DEFROST

Name Function

Manual Defrost Key (Upper Stage)

①

Cycle Defrost Key (Upper Stage)

②

Manual Defrost Lamp (Upper S tage)

③

Cycle Defrost Lamp (Upper Stage)

④

UPPER

CYCLE

DEFROST

OFF

MANUAL

DEFROST

LOWER

CYCLE

DEFROST

OFF

Uses this key for activating the manual defrost function of

the upper stage.

Uses this key for activating the cycle defrost function of the

upper stage.

Lights this lamp during performing the manual defrost function of the upper stage.

Lights this lamp in the following status:

- The cycle defrost function of the upper stage is under operation during the defrost operation.

- The cycle defrost function is under operation with the defrost stopped.

Manual Defrost Key (Lower Stage)

⑤

Uses this key for activating the manual defrost function of

the upper stage.

Cycle Defrost Key (Lower Stage)

⑥

Uses this key for activating the cycle defrost function of the

upper stage.

Manual Defrost Lamp (Lower Stage)

⑦

Lights this lamp during performing the manual defrost function of the upper stage.

Cycle Defrost Lamp (Lower Stage)

⑧

Lights this lamp in the following status:

- The cycle defrost function of the upper stage is under operation during the defrost operation.

- The cycle defrost function is under operation with the defrost stopped.

Page 16

Description and Function of Each Part

Characters of the Controller

The characters VS4 controller shows are as follows:

Character Identifier Name Purpose

FiX

AStP

AStr

tim

PrG3

PAt

End

Sv-1

t-1

PS-3

Pc-2

cAL

LocK

Fixed Temperature

Setting Mode

Temperature Setting

Timer Setting Mode

Display

Timer Setting Mode

Display

Time Setting

Program Type

Program Pattern

Step End

Program Temperature

Setting

Program Time Setting

Step Number to be

Repeated

Repeating Times

Calibration Offset

Setting

Overheating

Prevention Setting

Key Lock

Used for starting the fixed temperature operation.

Used for setting the temperature.

Represents the setting of quick auto stop or auto stop operation.

Represents the setting of auto start operation.

Used for setting the time.

Used for choosing program type from 1 to 3. (Refer to Page 23 "Program Operation".)

Used for choosing program pattern. (Refer to Page 23 "Program Operation".)

Represents the total number of the steps to be used. (Refer to Page 23 "Program Operation".)

Used for setting the temperature for each step in the program. (Sv-1 to Sv-30 is shown.)

Used for setting the time for each step in the program. (t-1 to t-30 is shown.)

Used for choosing the step number to be repeated under the program operation with repeat function. (Refer to Page 27 "Use program repeat function".)

Used for setting the repeating times under the program operation with repeat function. (Refer to Page 27 "Use program repeat function".)

Used for inputting the calibration offset temperature. (Refer to Page 30 "Other Function".)

Used for setting temperature for overheating prevention device. (Refer to Page 16 "Setting of Overheating Prevention Device ".)

Locks the keys on control panel to protect from unnecessary operation. (Refer to Page 30 "Other Function".)

* Also refer to Page 15 "Operation Mode, Function Setting Key, and Characters".

Parameter Edit

Unavailable

It shows up when trying to change the parameter (except temperature and time of the timer or program mode) during operation.

Page 17

Operation Method

Operation Mode and Function List

All the operation mode of this unit is as follows;

No. Name Description Page

Pressing the FIXED TEMP key enters into the fixed

Fixed Temperature

Operation

Quick Auto Stop

Operation

temperature operation setting mode. Pressing it again enters into the temperature setting mode. The "▲▼" are used to set temperature. Pressing the START/STOP key starts or stops operation.

This operation is used to specify the period up to automatic stop during operation. The period up to operation stop can be set by pressing the TIMER key during fixed temperature operation. The "▲▼" are used to set the time. Pressing the START key starts the quick auto stop operation, activates the timer function and stops the operation automatically after specified period.

3. Auto Stop Operation

4. Auto Start Operation

5. Program Operation

This operation is used to specify the automatic stop time in the fixed temperature operation. Pressing the TIMER key displays "ASｔp". The setting temperature "Sv" can be set by pressing the ENTER key. The operation time "tim" can be set by pressing it again. Pressing the START/STOP key starts the auto stop operation.

This operation is used to specify the period up to automatic start after power on. Pressing the TIMER key displays "ASｔr". The setting temperature "Sv" can be set by pressing the ENTER key. The operation time "tim" can be set by pressing it again. Pressing the START/STOP key starts the auto start operation.

This operation is used to change the temperature according to the setting temperature and time. Pressing the PROGRAM key displays "PrG1". Press it again to select the program mode. Press the ENTER key to select the pattern "PA t". Press the ENTER key to display "End". Input the number of patterns to be used. Input the temperature and time of patterns "SV-n" and "t-n" respectively.

NOTE) This unit is impossible to be changed the mode during the operation. If the mode requires to be

changed, stop the operation.

Page 18

Operation Method

Operation Mode and Function List

The operation function of this unit is as follows;

No. Name Description Page

Auto overheating prevention function

Overheating

prevention function

2. Calibration offset function

Overheating prevention

temperature calibration function

Overheating prevention device

This function is set to be automatically activated (auto reset) when the temperature exceeds the setting temperature by 6℃.

Though the device shares power source, display, and key input with the controller, it has independent temperature measurement circuit, CPU, sensor and output circuit. Overheating prevention temperature can be set using the operation panel. The unit stops operation when the device is activated. The unit starts operation again when the POWER switch is pressed again (manual reset).

This calibration offset function is for calibrating the difference occurred between the required infurnace temperature and control temperature (sensor temperature) of the controller. This unit can be calibrated toward either plus side or minus side of the whole temperature range.

The temperature of overheating prevention device is automatically corrected when the temperature of controller is collected.

4. Recovery at power failure

5. Setting value locking

The unit starts operation with the same condition as just before power failure if it occurs during operation.

This function locks the established operation status. It can be set and cancelled with the SUBMENU key.

Page 19

Operation Method

Operation Mode, Function Setting Key, and Characters

The operation mode setting and function setting use the key operation and characters show in the following figure.

for 1 sec.

Page 20

Operation Method

Setting of Overheating Prevention Device

The unit has the overheating prevention device (manual reset) that consists of independent temperature measurement circuit, CPU, sensor and output circuit (it shares power source, display, and key input with the controller) in addition to the automatic overheating prevention function (auto reset) in the controller.

The purpose of overheating prevention device is to protect the unit from overheating. It does not intend to protect the samples, or to protect them from the accident caused by the use of explosive or inflammability.

Setting range/function

The unit has failsafe functions against overheating. One of them is built in the controller and previously set at factory shipment so to be automatically activated when the temperature exceeds the setting temperature of temperature controller by 6℃, where the heater repeats on and off. The other is united with the controller, which can be set by operating the keys on the controller.

The setting range of latter is from 0℃ to 65℃. In case the temperature in furnace exceeds the setting temperature of controller to reach to that of

overheating prevention device, the circuit is shut off and "Er19" is displayed with blinking on the screen of controller with buzzer sound.

If the device is once activated,"Er19"continues to be displayed until the power is newly turned o n.

Temperature setting procedure

Notes:

• The standard setting temperature of device is "the maximum setting temperature of unit plus 5℃" or "setting temperature plus 5℃". If the unit performs improper operation, increase it 5℃ more.

• The setting range of overheating prevention device is from 0℃ to 65℃. Improper setting of temperature may cause inoperative of unit, malfunction of device, e.g. it is activated during increasing in temperature in furnace, or unexpected accidents such as fire disaster. To prevent such matters, set a proper value.

The temperature is set to 65℃ at factory shipment.

1. Turn on the power (turn on the breaker in front)

• The default value is displayed for about four seconds after turning on the power. The screen then displays the initial setting. The current temperature in furnace, operation mode character and setting temperature of overheating prevention device are displayed on respective screens.

2. Set the temperature for overheating prevention

① Press the SUBMENU key. ② Press the " ▼▲" several times to select the setting

character of overheating prevention temperature "OH".

③ Press the ENTER key. The current setting temperature is

displayed with blinking on the setting temperature screen.

Note: To prevent improper operation, set the value 10℃ or more

over the setting temperature of controller .

④ Select the value using the "▼▲"and then press the

ENTER key. This completes the setting.

Page 21

Fixed Temperature Operation

Operation Method

Fixed temperature

operation procedure

1. Turn on the power (turn on the breaker in front)

 Current version of the software is displayed for about four seconds

after turning on the power. The screen then displays the initial setting. The current temperature in furnace, operation mode character and setting temperature of overheating prevention device are displayed on respective screens.

Measurement temperature screen:

Displays the current temperature in furnace.

Setting temperature screen:

Displays the operation mode character. (Refer to Page 13)

Overheating prevention screen:

Displays the setting temperature of overheating prevention device

2. Select the operation mode

• Press the FIXED TEMP key to display "FIX", which indicates the fixed temperature operation, on the center display screen.

3. Set the temperature

• Press the FIXED TEMP key again.

• The setting temperature screen displays the character "Sv"

which indicates the temperature setting. Also it displays the current setting temperature with blinking. The FIXED TEMP lamp blinks, too.

• Set the temperature by pressing the "▼▲".

4. Start operation

• Press the orange START/STOP key for about one second. The unit starts operation and the blinking FIXED TEMP lamp lights on.

5. Stop operation

• Press the orange START/STOP key for about one second. The unit stops operation and the FIXED TEMP lamp lights off. The screen returns to the initial setting screen.

To correct or check setting…

Press the FIXED TEMP key again to correct or check the setting. Changing the setting temperature during operation is also possible by pressing the FIXED TEMP key. Press the ENTER key after changing the setting.

Page 22

Quick Auto Stop Operation

Operation Method

Quick auto stop operation procedure

Timer function:

This operation is used to specify the period up to automatic stop, i.e., sets the auto stop timer during operation.

1. Set the time up to stop during fixed temperature operation

• Check that the FIXED TEMP lamp lights on and that the unit is under operation.

• Press the TIMER key.

• The measurement temperature display screen displays the

character "tim", which indicates the timer setting. The setting temperature display screen displays the current setting time with blinking.

• Select the time by pressing the "▼▲".

• The maximum setting time is "999 hours and 50 minutes".

• The time can be set in increments of a minute under 99 hours a nd

59 minutes.

• It can be set in increment of ten minutes over 100 hours.

• The "▼▲"can change the setting time quickly when it is pressed

continuously. Press them discontinuously when fine adjustment is needed.

2. Start timer operation

• Press the START/STOP key for one second after deciding the

time.

• Timer operation starts with the FIXED TEMP and AUTO STOP

lamps lighting on.

• The timer is activated at the point when the START/STOP key is

pressed.

3. Stop/terminate timer operation

• The operation stops automatically at setting time.

• Buzzer continues to sound for about five minutes at operation

stop.

• The setting temperature screen displays the character "End",

which indicates termination of operation, with the FIXED TEMP and AUTO STOP lamps lighting on. Press the START/STOP key to terminate the timer operation mode. The screen returns to the initial setting screen.

To correct or check setting…

Changing the setting temperature during operation is possible by pressing the FIXED TEMP key. Press the ENTER key after changing the setting.

Changing the setting time during operation is possible by pressing the TIMER key. (Note that the time setting is required using the value calculated by adding a new additional time to the already passed time in this case.) Press the START/STOP key after changing the setting.

Press the ▼ key to display the setting temperature, operation mode and residual time on the setting temperature screen.

Page 23

Auto Stop Operation

Operation Method

Auto stop operation procedure

Timer function:

This operation is used to specify the automatic stop time in the fixed temperature operation.

1. Set stop time

① Press the TIMER key on the initial screen. ② The timer mode used for previous operation is displayed on the

setting temperature screen. Re-pressing the TIMER key blinks the timer mode. Re-pressing this TIMER key shifts the indication into the next timer mode with blinking. Select the character for auto stop operation “AStp”, and press the ENTER key. The measurement temperature screen displays the character "Sv", which indicates the temperature setting. The setting temperature screen displays the current setting temperature with blinking. The AUTO STOP lamp blinks, too.

③ Set the temperature us ing the "▼▲". ④ Press the ENTER key.

The measurement temperature display screen displays the character "tim", which indicates the timer setting. The setting temperature display screen displays the current setting time with blinking.

⑤ Set the time using the "▼▲".

• The maximum setting time is "999 hours and 50 minutes".

• The time can be set in increments of a minute under 99 hours a nd

59 minutes.

• It can be set in increment of ten minutes over 100 hours.

• The "▼▲"can change the setting time quickly when it is pressed

continuously. Press them discontinuously when fine adjustment is needed.

2. Start timer operation

• Press the START/STOP key for one second after deciding the

time.

• Timer operation starts with the AUTO STOP lamp lighting on.

• The timer is activated at the point when the temperature in

furnace (measurement temperature) reaches to the setting temperature.

Page 24

Operation Method

Auto Stop Operation

To correct or check setting…

Changing the setting temperature or time during operation is possible by pressing the TIMER key. Use the "▼▲" to change the setting value. Press the ENTER key respectively after changing the setting. (Note that the time setting is required using the value calculated by adding a new additional time to the already passed time in this case.)

Press the "▼" to display the setting temperature, operation mode and residual time on the setting temperature screen.

When the dot is blinked, the indicator of the remaining time e.g."1.30" indicates the countdown. When the dot is lit, the unit is under waiting (that is, the unit is under increasing or decreasing toward setting temperature), and the timer stop s counting.

3. Stop/terminate timer operation

• The operation stops automatically at setting time.

• Buzzer continues to sound for about five minutes at operation

stop.

• The setting temperature screen displays the character "End",

Page 25

Auto Start Operation

Operation Method

Auto start operation procedure

Timer function:

This operation is used to specify the period up to automatic start after power on.

1. Set start time

① Press the TIMER key on the initial screen. ② The timer mode used for previous operation is displayed on the

setting temperature screen. Re-pressing the TIMER key blinks the timer mode. Re-pressing this TIMER key shifts the indication into the next timer mode with blinking. Select the character for auto start operation “AStr”, and press the ENTER key. The measurement temperature screen displays the character "Sv", which indicates the temperature setting. The setting temperature screen displays the current setting temperature with blinking. The AUTO START lamp blinks, too.

③ Set the temperature us ing the "▼▲". ④ Press the ENTER key again.

The measurement temperature display screen displays the character "tim", which indicates the timer setting. The setting temperature display screen displays the current setting time with blinking.

⑤ Set the time using the "▼▲".

• The maximum setting time is "999 hours and 50 minutes".

• The time can be set in increments of a minute under 99 hours a nd

59 minutes.

• It can be set in increment of ten minutes over 100 hours.

• The "▼▲"can change the setting time quickly when it is pressed

continuously. Press them discontinuously when fine adjustment is needed.

2. Start timer operation

• Press the START/STOP key for one second after deciding the

time.

• Timer operation starts with the AUTO START lamp lighting on.

Page 26

Operation Method

Auto Start Operation

To correct or check setting…

Press the "▼" to display the setting temperature, operation mode and residual time on the setting temperature screen.

Note that the setting condition is impossible to change once starting the operation after passing the auto start operation time. In this case, stop the operation by pressing START/STOP key, and reset to initial status.

3. Stop/terminate timer operation

• The operation starts automatically at setting time.

• Press the START/STOP key for one second to stop or terminate

operation. The screen returns to the initial setting screen.

Page 27

Operation Method

Program Operation

This operation is used to change the temperature according to the setting temperature and time.

Program types

Temp.

Six patterns of program types maximum can be input.

PrG1 - 1 program pattern using 30 steps maximum can be created. PrG2

PrG3

PAt1 PAt2 PAt1 PAt2 PAt3

2 program patterns using 15 steps maximum can be created.

3 program patterns using 10 steps maximum can be created.

△ Stop △ Start

Time

Before inputting program…

Input program patterns before program operation.

① Check the number of steps in a created program and their setting temperature/time. Use the

program preparation sheet in pages 28 and 29 to check.

② Check the temperature rise/fall capability of the unit. Set the time within the capability above.

Suppose, for instance, that in the unit which has capability of increasing or decreasing temperature by 3℃ within ten minutes, about 35 minutes is needed to increase or decrease temperature by 10℃ from current temperature

Repeat function:

Repeat function is useful in case the operation uses the program repeating the same program steps. Refer to page27 for the function.

① Check if the controller has sufficient free pattern for the number of steps to be created. ② The steps, however, using the repeat function mentioned above are not counted.

Temperature fall/rise curve

The temperature fall curve and temperature rise curve for IQ821 are shown below. The numeric value indicates the necessary time between temperatures. Temperature stability time after reaching to the setting temperature is necessary to be added. Make sure to conduct a test run before setting the optimum time.

20℃ to 50℃: 25min.

20℃ to -10℃: 45min.

(Condition: room temperature 23℃, no load)

Page 28

Program Operation

Program creation

POWER

Operation Method

1. Turn on the power

• Turn on the power switch of the unit.

• The display on the controller lights on.

 The default value is displayed for about four seconds after turning

on the power. The screen then displays the initial setting. The current temperature in furnace, operation mode character and setting temperature of overheating prevention device are displayed on respective screens.

2. Select program mode/program pattern

① Press PROGRAM key.

The previous program mode is displayed on the setting temperature screen. One more pressing the PROGRAM key changes the indication status of the current selected program mode into blinking. One more pressing the PROGRAM key changed the indication into the next program mode with blinking.

② Select the required pr ogram mode, and press the ENTER key.

• In the case of selecting "PrG1", "End" is displayed on the

measurement temperature screen, and the number of the steps registered into the setting temperature screen is displayed with blinking.

• In the case of selecting "PrG2", "PAt" is displayed on the

measurement temperature screen, and the pattern number is displayed on the setting temperature screen with blinking. Select the pattern "1" or "2" using ▼▲ key. Pressing ENTER key displays "End" on the measurement temperature screen, and the number of the steps registered into the setting temperature screen is displayed with blinking.

• In the case of selecting "PrG3", select the pattern ”1”, ”2”, or “3”

with the same operation.

Page 29

Operation Method

Program Operation

The example shown below explains the method of program registration using "PrG3".

3. Register program

① Select "PrG3" referring to 2 mentioned above. ② Input the number of steps, temperature and time for respective steps

using the program creation sheet.

③ Press the ENTER key. The "PAt" is displayed on the measurement

temperature screen, and the number is displayed on the setting temperature screen with blinking. ("End" is displayed if "PrG1" is selected. In this case, go to ⑥)

④ Select the unused pattern from among Pat1, Pat2 and Pat3 using the "▲

▼".

⑤ Press the ENTER key. "End" is displayed and the step number "n" is

also displayed with blinking.

 "End" is a character which indicates the total step number to be u s ed.

⑥ INPUT "8", which is the total step number to be used here, using the "▲

▼".

⑦ Press the ENTER key. The character "SV-1", which indicates the setting

temperature of the first step, is displayed on the measurement temperature screen. The current setting temperature is also displayed on the setting temperature screen with blinking.

⑧ Set the temperature of the first step using the " ▲▼". ⑨ Press the ENTER key. The character "t-1", which indicates the setting

time of the first step, is displayed on the measurement temperature screen. The current setting time is also displayed on the setting temperature screen with blinking.

 Before setting the time, check the temperature rise/fall capability of unit.  Add an extra considering the temperature stability time.  The setting time of timer in respective steps is 999 hours and 50 minutes

maximum.

⑩ After the time is set, press the ENTER key.

The character "SV-2", which indicates the setting temperature of the second step, is displayed. In the same way, input the temperature and time for respective steps using the program creation sheet.

⑪ The different method is necessary where pro gr am repe at function is used.

In this case, press the SUBMENU key after setting the time in the step where the repeat operation is to be used. This enters to the repeat function setting mode.

 Follow the "Use program repeat function" in page 27 for the input method of

program repeating function.

⑫ The screen returns to the initial setting screen after the setting of

temperature and time in the final step is completed.

Verification run:

Make sure to check the setting temperature and time by operating the unit without load before performing actual run with samples.

Page 30

Program Operation

Operation Method

4. Start program operation

• Press the START/STOP key for about one second. The program

operation previously set starts.

• The PROGRAM lamp lights on and the setting temperature

screen displays the step currently under operation.

 Press the "▼" to check the setting temperature and residual time of

step currently under operation on the setting temperature screen.

 Press the START/STOP key for one second to stop operation.

Timer function:

5. End program operation

• Buzzer continues to sound for about five minutes at operation

stop.

• The measurement temperature screen displays the character

"END", which indicates the termination of program.

• Press the START/STOP key to return to the initial screen.

• The maximum setting time is "999 hours and 50 minutes".

• The time can be set in increments of a minute under 99 hours a nd

59 minutes.

• It can be set in increment of ten minutes over 100 hours.

• The "▼▲"can change the setting time quickly when it is pressed

continuously. Press them discontinuously when fine adjustment is needed.

To correct or check setting…

Press the FIXED TEMP key to correct the created program or to check the setting value. The screen returns to the former one, where correction or check is possible.

Last screen is displayed when the FIXED TEMP key is once pressed.

Note: Correction or check should be made on the pro gram setting screen.

Wait operation in program operation

The succeeding step does not start in case the measurement temperature does not reach to, or exceeds the setting temperature when a program goes to the next step in program operation. This unit, however, is previously set to carry out the next step if the measurement temperature is within ±3℃ of the setting temperature.

Page 31

Operation Method

Program Operation

Use program repeat function

This section explains how to register the program repeat (repeating a program pattern) in program operation.

This section explains the registration procedure of program using repeat function in "3. Register program" above.

The procedure sets the step number to be repeated "PS-n" and repeating times "Pc-n"(n: input step number)

① Press the SUBMENU key in stead of the ENTER key after setting

the time in the step where the repeat operation is to be used. This enters to the repeat function setting mode.

② The measurement temperature screen displays the character

"PS-n", which indicates the step to be repeated in the program pattern. The measurement temperature screen indicates "PS-7" in the example because repeat function is used at the seventh step. The step number 1 to 7 can be input in the setting temperature display screen. Enter the number (1 in the example) using the "▲▼".

③ Press the SUBMENU key.

The measurement temperature screen displays the character "Pc-n", which indicates the repeating times. Enter the value of repeating times with the "▲▼".

④ The screen goes to that for the next step when the SUBMENU

key is pressed again.

To correct or check setting…

Correction of setting during the repeat setting mode is impossi ble. To correct or check the setting, end the setting of step currently input. Press the FIXED TEMP key after the temperature setting screen for the next step appears. The screen returns to the former one and re-setting is possible.

Note: Correction or check should be made on the pro gram setting screen.

Page 32

Operation Method

Program Operation

Programming Preparation Form 1

(Please use this form by making copies)

Project Name

Program Pattern

55℃

37℃

-10℃

STEP

5℃

0℃

Date

Programmer

Page 33

Operation Method

Program Operation

Programming Preparation Form 2

(Please use this form by making copies)

Project Name

Input Value

Temperature (℃) Time (min.) Repeat Function Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 Step 7 Step 8 Step 9 Step 10 Step 11 Step 12 Step 13 Step 14 Step 15 Step 16 Step 17 Step 18 Step 19 Step 20 Step 21 Step 22 Step 23 Step 24 Step 25 Step 26 Step 27 Step 28 Step 29 Step 30

: : / : / : / : / : / : / : / : / : / : / : / : / : / : / : / : / : / : / : / : / : / : / : / : / : / : / : / : / : /

Date

Programmer

Step No./Times

Page 34

Operation Method

Other Functions

Use calibration offset function

Calibration offset is a function which corrects the difference between the temperature in furnace and that of controller (sensor temperature) if arises. The function parallel corrects the difference either to the plus or minus side within the whole temperature range of unit. The function can be set or cancelled by the SUBMENU key.

Corrected temp. to plus side

① Start operation with the target setting temperature. Check the

temperature in furnace (temperature of sample) with a thermograph after it is stabilized.

② Check the difference between the setting temperature and that in furnace

(temperature of sample).

③ Press the SUBMENU key. Select the character "cAL", which indicates

the calibration offset, using the "▲▼", and then press the ENTER key.

④ Input the difference using the "▲▼" and then press the ENTER key.

This completes the setting.

 The setting range of offset correction temperature is +99℃ to plus side and

-99℃ to minus side respectively. When it is set to the minus side, the temperature on the measurement temperature display screen falls by the setting temperature, while the temperature on furnace rises. When it is set to the minus side, the temperature on the measurement temperature display screen rises by the setting temperature, while the temperature on furnace falls.

 The unit has two-point correction function, which performs offset between

low-temperature zone and high-temperature zone.

 Please consult our local branch office when carrying out validation of

temperature controller.

Current temperature

Corrected temp. to minus side

Use lock function

This function locks the operation status previously set. The function can be set or cancelled by the SUBMENU key.

① Press the SUBMENU key. Select the character" "Lock", which indicates

the lock of setting value, using the "▲▼", and then press the ENTER key.

② The setting temperature screen displays "oFF". The setting value is

locked when it is turned to "oｎ" using the "▲".

③ Press the SUBMENU key again to cancel the lock. Select the character"

"Lock", which indicates the lock of setting value, using the "▲▼", and then press the ENTER key. Select "oFF" with the "▼" and then press the ENTER key to cancel the function.

 All keys other than the START/STOP and SUBMENU keys are lock when the

lock function is on.

Page 35

Handling Precautions

WARNING!

If a problem occurs

Substances that cannot be used

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.

When open/close door…

Do not get close to the traveling range of door when opening or closing it. It may hit your hands or head and result in an injury.

Keep door close during operation.

The heater is heated abnormally if the door is left opened during operation. Make sure to operate the unit with the door closed.

Do not use corrosive sample

Stainless steel is used for interior; however, it may be corroded by strong acid etc. And the door packing made of vinyl chloride may be corroded by some kind of solvent, e.g. alkaline, oil, halogen etc. Do not use the sample includes those.

Use under proper temperature range

Operational temperature range of this unit is -10 to 50℃. Never set the temperature out of that.

Page 36

Setting of sample

Since the withstand load of the attached shelf plate is about 15kg per one plate, do not set heavier sample than 15kg. When setting several sample, set them as dispersed as possible. Too much sample setting could cause the improper control of the temperature. For keeping the proper temperature, keep more than 30% space against whole size of the shelf plate, and set the sample.

Do not put sample on the internal base

Operating this unit with the sample put directly on the bottom of the inner furnace may affect the feature of temperature. Therefore, never put the sample on the bottom of the inner furnace. Besides, since the heater and vaporizer are installed on the wall of the inner of the unit, set the sample so as not to contact it directly to the wall of the unit. Align the sample onto the optional shelf.

Handling Precautions

Samples

on the bottom

Recovering 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.

Set the shelf

棚板設置

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.

Page 37

Maintenance Method

Daily Inspection and Maintenance

For the safety use of this unit, please perform the daily inspection and maintenance without fail. Using the city water to this unit might attach dirt. Do inspect and maintain this point while performing 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.

• Check the movement of the independent overheating prevention device.

Perform the fixed temperature operation of device with certain preset temperature. Then set the operation temperature of independent overheating prevention device to the value approximately 5℃ lower than the preset temperature of device.

In normal condition, the device shuts off the heating circuit in a few seconds, at the same time the TROUBLE lamp lights on and the "Er19" is indicated accompanied with a warning buzzer.

• Clean the fin on condenser.

Remove the grill on the front, then remove the dust on the surface of fin on condenser with a vacuum cleaner.

CAUTION!

Do not soak the fin for cleaning.

 Make sure to check the movement of earth leakage breaker above and overheating prevention device

before long term operation or night-time unmanned operation.

For any questions, contact the dealer who you purchased this unit from, or the nearest sales division in our company.

Page 38

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.

• Remove the door and driving parts.

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

Outer covering Electrical zinc plated steel plate, Epoxy and melamine resin coating Inner furnace Stainless steel Heat insulation material Expanded polystyrene Plates Resins

Electrical Parts

Switches, Relay Resin, Copper and other Control panel ABS resin Circuit boards Composite of glass fiber and other Heater Iron- chrome heater Circuit boards Board, Condenser, Transformer and other Power cord, Wiring Synthetic rubber or resin coated wiring materials Cooling medium HFC-R404A*

* The CFC (chlorofluorocarbon) is specified as the primary specific gas according to the Breaking Law for

CFC Collection. Emitting the CFC into the atmosphere in vain is prohibited strictly. In the case of scrapping this unit, it is required to collect CFC from this unit.

Page 39

In the Event of Failure…

Safety Device and Error Code

This unit has an automatic diagnosis function built in the controller and safety devices independent of the controller. The table below shows the cause and the solution method when the safety device operates.

Error Code:

When an abnormal condition occurs, an error code appears and the alarm lamp lights in the controller, the buzzer sounds simultaneously. Record the error code and turn off the power of device immediately.

Safety Device Notify Cause/Solution

Sensor trouble detection

SSR short-circuit detection

Heater disconnecting detection

Memory error

Internal communication error

Overheating

“ALARM” lamp lights on, “Er.01” appears

“ALARM” lamp lights on, “Er.02” appears

“ALARM” lamp lights on, “Er.03” appears

“ALARM” lamp lights on, “Er.15” appears

“ALARM” lamp lights on, “Er.17” appears

“ALARM” lamp lights on, “Er.19” appears

• Temperature sensor is broken or disconnected.

• Make a call for service.

• Triac is in short-circuit

• Make a call for service.

• Heater is disconnected.

• Make a call for service.

• Failure in internal memory.

• Make a call for service.

• Failure in internal communication or

temperature inputting circuit.

• Make a call for service.

• Overheating prevention device is in

operation.

• Reset the power supply, and then adjust the setting temperature of the overheating protection device.

• If the state does not recover, make a call for service.

Measurement temperature error

“ALARM” lamp lights on, “----” appears

• Measurement value is out of display range.

• Make a call for service.

Page 40

Trouble Shooting

Problem Possible Cause Solution

The device does not start when turning on the power switch.

In the Event of Failure…

Earth leakage breaker failure Replace the part.

Power switch failure Replace the part.

Power source failure

Heater disconnection Replace the part.

Connect to the appropriate power source

Temperature does not rise.

Temperature does not fall.

Heater does not stop working when the temperature reaches setting value.

SSR failure Replace the part.

Temperature controller failure Replace the p art.

Temperature sensor failure Replace the part.

Temperature controller failure Replace the p art.

Clogging of condenser with dust Clean the fin on condenser

Much frost on evaporator Defrost

Relay failure Replace the part.

Power source failure

Refrigerator failure Repair or replace the part.

SSR failure Replace the part.

Temperature controller failure Replace the p art.

Connect to the appropriate power source

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.

Page 41

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.

Page 42

Specification

Model IQ821 Method Forced circulation Temperature control

range Temperature

adjustment accuracy Temperature

distribution accuracy Time required to reach

highest temperature Time required to reach

lowest temperature Inner furnace Stainless steel Outer covering Electrical zinc plated steel plate, Epoxy and melamine resin coating Door Electrical zinc plated steel plate, Epoxy and melamine resin coating, With lock unit Inner door Tempered glass Heat insulation material Expanded polystyrene (CFC-free) Refrigerator Cooling medium HFC-R404A Defrost function Manual defrost (manually ON/automatic OFF), Cycle defrost operation Fan of blower

Heater Cable port Inner diameter: 50mm (right surface of the upper/lower unit) Temperature control

system Setting method Digital setting by menu keys and up/down keys

Display method Timer display 1min to 99h59min, 100 to 999.5h

Operation mode Fixed temperature, Quick auto stop, Auto stop, Auto start, Program operation Additional functions Timer function, Calibration offset, 3 stages auto tuning function

Sensor

Safety devices

±0.3℃ (Refrigerator is in continuous operation, Common to upper/lower unit)

±1.0℃ (Refrigerator is in continuous operation, Common to upper/lower unit)

VS4 type 30 steps and 3 patterns programmable controller,

Setting temperature: Digital display by four-digit green LED,

Self-diagnostic functions (Memory er ror, Failure of sensor, Heater disconnection, Failure of overheating prevention device, SSR short-circuit, At error, Automatic overheating prevention device), Key lock Function, Earth leakage breaker, Overheating prevention device

-10 to 50℃ (Common to upper/lower unit)

20℃ to 50℃: Approx. 25min.

20℃ to -10℃: Approx. 45min.

Air-cooled and full-closed type compressor, 250W×2

Axial fan×2

Iron-chrome wire heater 550W×2

PID control by microcomputer

Temperature: Digital display by four-digit red LED

For temperature control: Platinum resistance bulb,

For overheating prevention: K-thermocouple

Page 43

Specification

External dimensions Internal dimensions Capacity Withstand load of shelf 15kg/one shelf

Number of shelf bracket step

Interval of shelf bracket steps

Power supply 100V AC single phase 20A, Rounded terminal Weight 158Kg

Shelf (stainless punching metal)×6 (3 for each furnace)

Accessories

 The value for performance is under the condition of the power 100VAC, the ambient temperature of 23℃±

5℃, the humidity of 65％RH±20％, and without load.

 The projection is not included for external dimensions.

Optional Accessories

710W×645D×1630H mm

600W×477D×500H mm × 2

143L × 2

13 (on each furnace)

30mm

Shelf bracket×12 (6 for each furnace)

Door key×2

Instruction manual

Name Product code Shelf (with bracket) 211221 Temperature output terminal (4 to 20mA) 200000 Time up signal output terminal 200000 External communication terminal (RS485) 200000 External communication adapter (RS485/RS232C conversion) 200000 Alarm output terminal 200000

Page 44

Wiring Diagram

AC100V

P3ELB

MV1

MV2

FM2

OVR1

RF1

Symbol Part name Symbol Part name Symbol Part name

ELB Earth leakage breaker X1 Relay (inner heater) PIO1 Display circuit board

P1 Terminal block X2 Relay (refrigerator) CT1 Current transformer

H1 Heater (inner) X3

H2 Heater (door) X4 Relay (solenoid valve) C1 Operation condenser

FM1 Fan motor (inner) DEF Defrost circuit board C2 Start condenser FM2 Fan motor (refrigerator) TH1 MV1 Solenoid valve (defrost) SSR1 Solid state relay RF1 Refrigerator MV2

Solenoid valve (return duct)

Symbol Part name Symbol Part name Symbol Part name

P2 Terminal block X7 Relay (refrigerator) PIO2 Display circuit board

H3 Heater (inner) X8

H4 Heater (door) X5 Relay (solenoid valve) OVR2 Overload relay

FM3 Fan motor (inner) DEF Defrost circuit board C3 Operation condenser FM4 Fan motor (refrigerator) TH2 MV3 Solenoid valve (defrost) SSR2 Solid state relay XS2 Start relay MV4

X6 Relay (inner heater) - - - -

Solenoid valve (return duct)

①

②

③

④

⑤

⑥

⑦

⑧

FM1

⑨

⑩

⑪

⑫

⑬

⑭

⑮

X1 X2-1

X2-2

XS1

213

SSR1

CT1

X3-2

26 27

⑯

XS1

CN5

2 3

⑰

CN2

⑱

CN1

X3-1

⑲

CN4

CONT1

2 3

1 2

3 4

DEF

CN8

CN9

TB1 2

TB2

CN1

CN2

PIO1

1 2

TH1

MV3

MV4

FM4

OVR2

RF2

FM3

X7-2

XS2

X7-1

2 1

CT2

X8-2

XS2

SSR2

X8-1

CN5

CN8

CN2

CN9

CN1

TB1 2

CN4

TB2

CONT2

Relay (overheating prevention

OVR1 Overload relay

device)

Temperature sensor (double)

XS1 Start relay

CONT1 PLANAR board - -

Relay (overheating prevention

CT2 Current transformer

device)

Temperature sensor (double)

C4 Start condenser

CONT2 PLANAR board RF2 Refrigerator

CN1

CN2

PIO2

TH2

Page 45

Replacement Parts Table

Symbol Part Name Specification Manufacturer Code No.

X1, 2, 3, 6, 7, 8 Relay AP3124K Matsushita A0334 X4, 5 Relay G3R-1-T DC6V OMRON 2-05-000-0026 P1, 2 Terminal block MO11-0FX 15P Toyo Giken LT00001083 FM1, 2 Fan UF12A10BTH Yamato Scientific 2-15-000-0010 SSR SSR YLT-SSR-01 Yamato Scientific 2-16-000-0035 TF Transformer AC200V Yamato Scientific 2-18-000-0044

TH1, 2 ELB

Solenoid valve SEV-502DXF Saginomiya 3-02-006-0003

Temperature sensor Earth leakage breaker

Pt100Ω/K-Thermocouple FG32R/15-30MA Fuji Denki 2-06-005-0003

Yamato Scientific LT00001081

Solenoid valve NEV-603DXF Saginomiya 3-02-006-0004 RF1, 2 Compressor C-2SN250L0U SANYO 3-01-006-0003 Condenser 1-000-0005-07-0 SANYO 3-01-006-0007 FM2, 4 Fan motor SE4-C041NP SANYO 3-01-006-0006 Dryer KC-10432 Meiko Kiki 3-20-003-6002 Charge valve FV222D0010C Meiko Kiki 3-25-001-0002 Accumulator SAC-154000 SANYO 3-23-000-0001 H1, 3 Heater 550W/100V Yamato Scientific IN161 H2, 4 Cord heater 19W/100V Yamato Scientific IB016 Evaporator Yamato Scientific IN600-30310 Capillary CONT1, 2 PLANAR board VS4 Yamato Scientific 1-02-000-0053

PIO1, 2 DFF

Display circuit board Defrost circuit board

φ1.0×3000mm

VS4 Yamato Scientific 1-02-000-0051 IQ820 Yamato Scientific LT00001082

Yamato Scientific IN800-30121

Page 46

List of Dangerous Substances

Never use explosive substances, flammable substances and substances that include explosive or flammable ingredients in this unit.

EXPLOSIVE

Ethylene glycol dinitrate (nitro glycol), Glycerin trinitrate (nitroglycerine), Cellulose nitrate (nitrocellulose), and other explosive nitrate esters

Reference

EXPLOSIVE:

FLAMMABLE

IGNITING:

OXIDIZING:

Trinitrobenzene, Trinitrotoluene, Trinitrophenol (picric acid), and other explosive nitro compounds

Acetyl hidroperoxide (peracetic acid), Methyl ethyl ketone peroxide, Benzyl peroxide, and other organic peroxides

Lithium (metal), Potassium (metal), Sodium (metal), Yellow phosphorus, Phosphorus sulfide, Red phosphorus, Celluloid compounds, Calcium carbide, Lime phosphate, Magnesium (powder), Aluminum (powder), Powder of metals other than magnesium and aluminum, Sodium hydrosulfite

Potassium chlorate, Sodium chlorate, Ammonium chlorate, and other chlorate Potassium perchlorate, Sodium perchlorate, Ammonium perchlorate, and other

perchlorate Potassium peroxide, Sodium peroxide, Barium peroxide, and other inorganic

peroxide Potassium nitrate, Sodium nitrate, Ammonium nitrate, and other nitrate Sodium chlorite and other chlorites Calcium hypochlorite and other hypochlorites Ethyl ether, Gasoline, Acetaldehyde, Propylene chloride, Carbon disulfide, and

other flammable substances having a flash point of lower than -30℃

INFLAMMABLE

LIQUID:

FLAMMABLE

GAS:

Normal hexane, ethylene oxide, acetone, benzene, methyl ethyl ketone, and other flammable substances having a flash point of -30℃ or higher but lower than 0℃

Methanol, Ethanol, Xylene, Pentyl acetate (amyl acetate), and other flammable substances having a flash point of 0℃ or higher but lower than 30℃

Kerosene, Light oil (gas oil), Oil of turpentine, Isopentyl alcohol (isoamyl alcohol), Acetic acid, and other flammable substances having a flash point of 30℃ or higher but lower than 65℃

Hydrogen, Acetylene, Ethylene, Methane, Propane, Butane, and other flammable substances which assume a gaseous state at 15℃ and 1 atm

(Source: Appendix Table 1 of Article 6 of the Industrial Safety and Health Order in Japan)

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Responsibility

Please follow the instructions in this document when using this unit. Yamato Scientific has no responsibility for the accidents or breakdown of device if it is used with a failure to comply. Never conduct what this document forbids. Unexpected accidents or breakdown may result in.

Note

◆ The contents of this document may be changed in future without notice.

◆ Any books with missing pages or disorderly binding may be replaced.

Instruction Manual for

Programmable Low Temperature Incubator Model IQ821

First Edition Jun. 30, 2009

Yamato Scientific Co., Ltd.

2-1-6 Nihonbashi Honcho, Chuo-ku,

Tokyo, 103-8432, Japan

http://www.yamato-net.co.jp