Etac HIFLEX NEO User manual

Issued on oct.29, 2012 (5th edition)
T e m p e r a t u r e ( H u m i d i t y ) C h a m b e r
Operation Manual
Temperature and Humidity Test Chamber
Main body / Maintenance

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Thank you very much for purchasing our HIFLEX NEO series Temperature (Humidity)
Chamber. This NEO series was developed utilizing ETAC's original
technologies and taking the current market trends into consideration. We
believe that this series will meet your various needs. In order to use all
functions of this product effectively, correctly, and safely, please first read
this operation manual carefully to fully understand the features and operation
methods.
This manual contains information on all HIFLEX NEO series products. Please collate
information based on your purchased model.
Preface
-NOTE -
The “lot No.”is also indicated on the lower right of the front panel of the chamber.
When contacting us regarding a chamber, please remember to provide us
with the “Lot No.”as well.

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INDEX
■FOR SAFE USE.......................................................................................................................6
●OUR WARNING LABELS...........................................................................................................6
●PLEASE OBSERVE THE FOLLOWING INSTRUCTIONS FOR SAFETY ................................................7
■IMPORTANT INSTRUCTIONS .................................................................................................. 11
●INSTALLATION ENVIRONMENT............................................................................................... 11
●PRECAUTIONS FOR HANDLING SPECIMENS ............................................................................ 14
●HANDLING INSTRUCTIONS .................................................................................................... 16
●OPERATING INSTRUCTIONS .................................................................................................. 18
●PRECAUTIONS FOR DISPOSAL............................................................................................... 20
■LIST OF STANDARD ACCESSORIES........................................................................................ 20
■NAME OF PARTS.................................................................................................................. 22
■PREPARING FOR OPERATION ............................................................................................... 23
1. INSTALLING THE CHAMBER..................................................................................................... 23
2. PREPARING HUMIDIFICATION WATER (FX TYPE)...................................................................... 23
3. CONNECTING DRAIN HOSES................................................................................................... 24
4. CONNECTING THE POWER ..................................................................................................... 25
5. STARTING AN OPERATION...................................................................................................... 26
■ADDITIONAL FUNCTIONS ...................................................................................................... 27
●INTERLOCK.......................................................................................................................... 27
●EXTERNAL OUTPUT TERMINAL ............................................................................................. 28
●LAN CONNECTOR................................................................................................................ 29
●USB CONNECTOR ............................................................................................................... 29
●HUMIDIFICATION VAPOR RECOVERY SYSTEM ......................................................................... 30
■OPERATING FUNCTIONS............................................................................................... 31
●LOCAL/REMOTE CONTROL OPERATION .................................................................................. 31
●DISPLAYING THE STATUS OF EQUIPMENT/INSTRUMENT........................................................... 34
●ERROR NUMBERS ................................................................................................................ 36
●ABOUT SETTING OF UPPER AND LOWER TEMPERATURE LIMITS................................................ 39
●SETTING OVERHEAT PROTECTOR (FOR THE PROTECTION OF SPECIMENS) ............................... 39
■HOW TO RESET ERROR/ALARM............................................................................................ 40
●ERROR/ALARM RESETTING PROCEDURES.............................................................................. 40
●RESUMING AN OPERATION AFTER RESETTING ERROR/ALARM................................................ 40
■DEFROSTING METHOD......................................................................................................... 41
●ABOUT FROST FORMATION ON THE CHILLER .......................................................................... 41
●CHECKING FROST FORMATION.............................................................................................. 41
●HOW TO DEFROST ............................................................................................................... 41
●WHEN ER01 IS DISPLAYED ................................................................................................... 42

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●WHEN ER04 IS DISPLAYED ................................................................................................... 43
●WHEN ER06 IS DISPLAYED ................................................................................................... 45
●WHEN ER11, 12, OR 13 IS DISPLAYED .................................................................................. 48
●WHEN ER15 OR 16 IS DISPLAYED......................................................................................... 49
●WHEN ER18 OR 19 IS DISPLAYED......................................................................................... 50
●WHEN ER21, 22, OR 23 IS DISPLAYED .................................................................................. 51
●WHEN ER27 IS DISPLAYED ................................................................................................... 53
●WHEN ER31 IS DISPLAYED ................................................................................................... 54
●WHEN ER32 IS DISPLAYED ................................................................................................... 55
●WHEN ER41, 42, OR 43 IS DISPLAYED .................................................................................. 56
●WHEN ER45 IS DISPLAYED ................................................................................................... 57
●WHEN ER47 IS DISPLAYED ................................................................................................... 58
●WHEN ER49 IS DISPLAYED ................................................................................................... 60
●WHEN ER51 IS DISPLAYED ................................................................................................... 63
●WHEN ER56 IS DISPLAYED ................................................................................................... 64
●WHEN ER57 IS DISPLAYED ................................................................................................... 65
●WHEN ER60 IS DISPLAYED ................................................................................................... 65
●WHEN ER61 IS DISPLAYED ................................................................................................... 66
●WHEN ER99 IS DISPLAYED ................................................................................................... 66
●WHEN AL26 IS DISPLAYED ................................................................................................... 67
●WHEN AL45 IS DISPLAYED ................................................................................................... 68
●WHEN AL47 IS DISPLAYED ................................................................................................... 69
●WHEN AL48 IS DISPLAYED ................................................................................................... 70
●WHEN AL49 IS DISPLAYED ................................................................................................... 71
●WHEN AL50 IS DISPLAYED ................................................................................................... 73
●WHEN AL52 IS DISPLAYED ................................................................................................... 74
●WHEN AL72 IS DISPLAYED ................................................................................................... 75
●WHEN AL73 IS DISPLAYED ................................................................................................... 76
●WHEN AL75 IS DISPLAYED ................................................................................................... 78
●WHEN AL84 IS DISPLAYED ................................................................................................... 79
●WHEN AL86 IS DISPLAYED ................................................................................................... 79
●TROUBLESHOOTING PROBLEMS WITHOUT ERROR/ALARM DISPLAY .......................................... 80
◇CHAMBER OPERATION DOES NOT START BY PRESSING THE RUN/STOP BUTTON.................... 80
◇TEMPERATURE DOES NOT RISE DURING THE TEST. ................................................................ 80
◇TEMPERATURE DOES NOT RISE............................................................................................. 80
◇TEMPERATURE AND HUMIDITY DO NOT DECREASE DURING THE TEST. ..................................... 80
◇WINDOW LAMP DOES NOT LIGHT UP. ..................................................................................... 80
◇CONDENSATION OR CLOUDING OCCURS ON THE SURFACE OF VIEWING WINDOW...................... 80
◇USE OF THE HUMIDIFICATION WATER IS EXTREMELY LARGE. ................................................... 81

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◇THE EARTH LEAKAGE BREAKER TRIPPED. .............................................................................. 81
■MAINTENANCE AND INSPECTION ........................................................................................... 83
○CHECK POINTS FOR 1ST MONTH INSPECTION .......................................................................... 83
○CHECK POINTS FOR 3RD MONTH INSPECTION.......................................................................... 84
○CHECK POINTS FOR 6TH MONTH INSPECTION .......................................................................... 85
○CHECK POINTS FOR 1ST YEAR INSPECTION ............................................................................. 86
○INSPECTION UPON RELOCATION............................................................................................. 86
■EXPECTED SERVICE LIFE OF MAJOR PARTS............................................................................ 89
■WARRANTY COVERAGE ....................................................................................................... 90
■MATERIALS OF PARTS.......................................................................................................... 90
◆SCHEMATIC DIAGRAM OF ENTIRE SYSTEM ............................................................................. 91
◆SCHEMATIC DIAGRAM OF REFRIGERATION SYSTEM (FX/ FL410N, 420N ) ........................... 92
◆SCHEMATIC DIAGRAM OF WATER CIRCUIT ............................................................................. 93
◆OPERABLE RANGE OF FOR REFRIGERATOR AUTO/MANUAL OPERATION.................................... 94
◆SPECIFICATIONS FOR LOW TEMPERATURE &HUMIDITY CHAMBER FX TYPE (- 40 ℃) ............... 95
◆TEMPERATURE /HUMIDITY CONTROL RANGE (FX TYPE) ....................................................... 103

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■For Safe Use
Although safety features are incorporated in our product designs, inappropriate usage by users may cause fire, electric shock, etc.,
which can result in physical injury. When using a chamber, please first read this operation manual carefully to ensure correct and
safe operations.
●Our Warning Labels
We have the following types of warning labels.
Meaning of warning signs are as follows.
Neglecting the warning may cause physical injury or damage of properties.
Neglecting the warning may cause death or severe injuries.
This is a sign which indicates the act that must be done.
This is a sign which indicates the act that should not be done..
WARNING
CAUTION
PROHIBITED

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●Please observe the following instructions for safety
Category
Source of danger
CAUTION
Possible harm
Caution
Power source
Do not use a power source of other than
50/60Hz frequency.
Otherwise, an electrical shock,
heat, or fire may be caused.
Frequency
Caution
Power plug
Insert the power plug completely.
Occasional cleaning is required.
Otherwise, an electrical shock,
heat, or fire may be caused.
Connection
Warning
Power plug socket
Use a dedicated power socket.
Otherwise, an electrical shock,
heat, or fire may be caused.
Connection
Warning
Power cord
Do not extend the power cord or
connect too many power plugs into
one electrical outlet.
Otherwise, an electrical shock,
heat, or fire may be caused.
Connection
Warning
Power cord
Do not apply unnatural force such as
scratching, over-bending, or pulling.
Otherwise, an electrical shock,
heat, or fire may be caused.
Unnatural force
Caution
Earth leakage
breaker
If the earth leakage breaker is
activated, consult your sales agent
first without resetting it.
Otherwise, an electrical shock,
heat, or fire may be caused.
Post handling
Warning
Combustibles and
ignitable substances
Do not place inside the chamber.
This may cause explosions or fire.
Explosives
Warning
Rotating parts of the
fan
Do not insert fingers or sticks into the
rotating parts of the fan.
This may cause injury or electrical
shock.
Insertion
Warning
Door
Do not hang on the door. Do not open
the door too wide and exceed the
limit.
Otherwise, the door may drop or
the chamber may fall resulting in
injury.
Unnatural force
Warning
Door
Do not open the door when facing its
opening if the inside temperature is above
40℃.
The hot air or steam may burn
your skin.
Release of
steam
Warning
Service panels
Do not allow an unauthorized person
to open the panels.
Otherwise, injury or electrical
shock may be caused.
Unauthorized
person
Warning
Service panels
Before opening a service panel, make
sure that the earth leakage breaker is
turned off.
Otherwise, an electrical shock
may be caused.
Power source
Warning
Room lamp, fuse
Before changing a window lamp or
fuse, make sure that the earth leakage
breaker is turned off.
This may cause an electrical
shock.
Power source
Warning
Refrigerator
condenser
Before cleaning the refrigerator
condenser, make sure that the earth
leakage breaker is turned off.
You may be injured by the fan
fixed near the condenser.
Power source
Warning
Power plug
Do not pull out the power plug by
holding the cord.
This may cause the breaking of
wires, electrical shock or heat.
Pulling of cords
Warning
Power plug
Do not pull out the plug with wet
hands.
This may cause an electrical
shock.
Water leak

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Category
Source of danger
CAUTION
Possible harm
Warning
Power plug
Do not use the power plug if the
connection is loose.
This may cause an electrical
shock, short circuit, or heat.
Connection
Category
Source of danger
CAUTION
Possible harm
Caution
Power plug
When not using the chamber for a
long time, disconnect the plug to
prevent dust.
This may cause heat or fire.
Dust
Caution
Earth leakage
breaker
Regularly check the operation and if it
is abnormal, replace it.
This may cause an electrical
shock.
Operation check
Caution
Overheat protector
Regularly check the operation and if it
is abnormal, replace it.
This may cause heat or fire.
Operation check
Caution
Specimen shelves
Fix them correctly and firmly.
Otherwise, shelves may come off
and fall resulting in injuries or
damage to specimens.
Installation
Warning
Specimen shelves
Do not place specimens exceeding
the specified weight.
Otherwise, shelves may come off
and fall resulting in injuries or
damage to specimens.
Weight:
Warning
Glass parts
Do not rest your hand or apply force to
the glass parts.
This may cause breakage of the
glass or injury.
Unnatural force
Warning
Refrigerator
condenser
Do not touch the thin fin while
cleaning.
This may cause injury to your
fingers.
Contact
Warning
Door handle
Do not hold other than the handle
when closing the door.
This may cause injury if your hand
is caught in between.
Handling of the
door
Warning
Internal door frame,
heat exhaust,
heater terminals
Do not touch these areas with your
hand and avoid contact.
This may cause burns.
Contact
Warning
Exterior of the
chamber
Do not nail screws or rivets.
This may cause a short circuit or
electrical shock.
Modification
Warning
Chamber
Do not climb or hang on the chamber.
The chamber may fall causing
injury or damage.
Weight:
Warning
Airtight specimens
Do not place inside the chamber.
This may cause damage due to
freezing or a high temperature
explosion.
Specimen

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(Installation and Disposal)
Category
Source of danger
CAUTION
Possible harm
Warning
Installation site
Avoid places which are prone to high
humidity or moisture.
Failure to do so may cause
electrical shock or a short circuit.
High humidity,
moisture
Warning
Installation site
Install in a space away from
equipment that may generate noise.
This may cause a malfunction or
a serious accident.
Loud noises
Caution
Installation site
Please contact us or your vendor
It may cause electrical shock,
short circuit, or fire.
Installation work
Caution
Installation site
First read the operation manual
carefully.
Failure to do so may cause an
unexpected accident.
Manual
Caution
Installation site
Make sure that D-class earth is
properly grounded.
This may cause an electrical
shock.
Grounding
Warning
Storage and
disposal of
chambers.
Do not store chambers outdoors
where they may be exposed to rain
water.
This may cause a short circuit or
electrical shock.
Rain water
Warning
Storage and
disposal of
chambers.
Do not store chambers where young
children can easily access them.
This may cause death from
suffocation, etc.
Storage space
Caution
Storage and
disposal of
chambers.
Ask us or your vendor to dismantle or
dispose of your unwanted chambers.
This may cause injury or accident.
Dismantling and
disposal
Caution
Cleaning and
inspection
Please wear gloves.
If not, injury may be caused.
Wearing gloves
Category
Source of danger
CAUTION
Possible harm
Caution
Installation site
Select a floor which can properly
withstand the weight of the chamber.
The chamber may fall causing
injury or damage.
Floor load
Caution
Installation site
Install the chamber on a level floor.
The chamber may fall causing
injury or damage.
Level floor
Warning
Installation site
Do not install the chamber outdoors
where it is exposed to rain water, etc.
Failure to do so may cause
electrical shock or a short circuit.
Rain water

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Category
Source of danger
CAUTION
Possible harm
Warning
Disassembling and
alternation
Service engineers or vendors only.
Unauthorized personnel are strictly
prohibited.
Otherwise, an electrical shock,
heat, or fire may be caused.
Disassembling
and alteration
(When Transferring)
Category
Source of danger
CAUTION
Possible harm
Warning
When transferring
the chamber
Do not damage the power plug or the
code.
It may cause electrical shock,
short circuit, or fire.
Damages to the
code
Warning
When transferring
the chamber
First drain out water completely.
Failure to do so may cause
electrical shock or a short circuit.
Complete
drainage
Caution
When transferring
the chamber
Do not apply force on the glass parts,
etc.
If not, injury may be caused.
Pushing glass
parts
Caution
When transferring
the chamber
First remove all specimens from the
chamber.
Failure to do so may cause
damage to the specimens.
Removal of
specimens
Caution
When transferring
the chamber
Please take necessary caution so that
the chamber will not fall.
If not, injury may be caused.
Falling of the
chamber

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■Important Instructions
●Installation Environment
Environmental test chambers are precision apparatuses. In order to maintain reliable performance for the
long term, please prepare a suitable installation environment by observing the following instructions.
〇Maintain the room temperature of the installation site within the range of ＋10℃to
32℃. (recommended)
This chamber comes with air-cooled refrigerator. As ambient temperature increases, the refrigeration
capacity gradually decreases and basic performance will be affected, such as not being able to reach
minimum temperature. Once ambient temperature exceeds +40℃, temperature around the temperature control
instruments in the electric board increases, causing the protective device to trip and shut down the instruments. On the
other hand, if an ambient temperature falls below +0℃, humidification water in the water circuit will freeze,
or overcooled refrigerant which circulates inside the refrigeration circuit may cause failure.
〇When using the chamber inside a closed room, be sure to turn on the air conditioner.
Warm air is exhausted from the refrigerator which is mounted inside the chamber during the operation. If
warm air continues to exhaust in a closed-up room, the room temperature will gradually increase and the
chamber as well as other measuring instruments may be adversely affected. (Please refer to the
specifications table of respective model for the amount of heat exhaust.)
〇Door packing or circumference of the cable port may condensate during a
low-temperature operation.
During a low temperature operation, condensation may occur around the door packing depending on the
ambient temperature at the time. Moreover, if the silicon stopper of the cable port is not tightly fitted in,
external air may enter inside the chamber, causing frost formation.
〇Be careful not to change ambient temperature suddenly.
If a chamber is placed in an area from where external air can directly enter inside the chamber such as near
a door, temperature measurements may be temporarily affected causing control failure.
〇Do not expose the chamber to direct sunlight.
This may cause breakdown, malfunction, or inaccurate measurement.
〇Do not directly expose the chamber to hot or cold air from air conditioners or any other
apparatus.
This may cause breakdown, malfunction, or control failure.

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〇Do not use the chamber in a corrosive or explosive atmosphere.
This may cause breakdown, malfunction, or deterioration. Also, this may cause accidental explosions. This device does not
have explosion-proof construction.
〇Do not place the chamber near equipment that may cause noise.
This may cause breakdown, malfunction, or control failure.
〇Do not install the chamber in a dusty place.
This may cause breakdown, malfunction, or control failure.
〇Do not install the chamber in a place where vibrations can be felt.
This may cause breakdown, malfunction, or control failure.
〇Install the chamber on a level floor.
If the chamber is not placed on the level, both humidification water level control and water drainage will be affected. Make sure
to check the levelness of the chamber using the bubble level or another instrument when installing or transferring the chamber.
〇Do not place any objects which can obstruct air exhaust on the roof.
This may cause overheating of the refrigerator or electric apparatus, resulting in an abnormal stop of the
chamber.
〇Do not place any objects which can obstruct air suction at the front.
This may cause overheating of the refrigerator or electric apparatus, resulting in an abnormal stop of the
chamber.

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〇Chamber installation space
For air suction/exhaust of the refrigerator and for opening/closing the door, the following space needs to
be secured.
◇Minimum space required for normal usage
* Sufficient space must be secured on the right side because operators need to frequently access this side in order to connect external output
terminals, LAN cable, earth leakage breaker, and water circuit switching valve.
◇Space required for repair and inspections
Door opening/closing space # 10 type : 930 or more # 20 type : 1030 or more # 30 type : 1330 or more
Top view (unit: mm)
600 or more
600 or more
Refrigerator
exhaust heat
outlet
600 or more
Air suction
For exhaust
Air suction
500 or more up to the ceiling
Door opening/closing space # 10 type : 930 or more # 20 type : 1030 or more # 30 type : 1330 or more
Top view (unit: mm)
100 or more
500 or more
Earth leakage breaker,
external output
terminals, LAN cables
are connected on this
side
100 or more
Refrigerator
exhaust heat
outlet

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* In order to perform maintenance work, minimum space of 600mm is required. If it is not possible
to move the chamber forward, please make sure to secure the said space.
●Precautions for handling specimens
〇Do not place dangerous specimens inside the chamber.
Never place the explosive and inflammable materials shown in Table 1 inside the chamber. This may cause an explosion hazard.
In addition, never place the specimens or jigs if their ignition point is below 180℃. This may cause smoking or fire.
〇Do not place specimens which generate corrosive gases such as SOx and NOx in the chamber.
Do not use specimens that generate corrosive gases such as sulfur dioxide because such specimens deteriorate the materials of the
chamber.
〇When applying voltage to specimens, use the interlock terminal.
If the chamber is stopped due to some reason, temperature inside the chamber will increase due to self-heating of. specimens,
resulting in burning of the specimens. (For more details, please refer to P27 "Interlock".)
〇This chamber should not be used for the tests which require a clean atmosphere.
This chamber does not control the degree of cleanliness like a clean room.
〇Please prevent the formation of condensation on the specimens.
While temperature (humidity) is rising, air temperature inside the chamber and the specimen's temperature do not rise
simultaneously. After air temperature inside the chamber rises, specimen temperature will rise subsequently. Time difference
will vary depending on the materials and quantity of specimens. If specimen temperature becomes lower than the dew-point
temperature of the air temperature at the point of time while temperature is rising, the specimen will condensate. In order to
avoid condensation of specimens, take note of the following points.
Countermeasure 1 Do not suddenly increase temperature (humidity)
Set temperature (humidity) ramp-up rate using program operation mode so that temperature (humidity) will not suddenly
increase during an operation.
For example, in the case of performing a high humidity operation such as +85 ℃/85%RH, it is necessary to gradually increase temperature up
to +85 ℃first, then increase humidity about 10 to 30 minutes later.
Countermeasure 2 Do not leave specimens inside the chamber after a temperature/humidity test is completed.
If specimens are left inside the chamber after a test is stopped, relative humidity inside the chamber may naturally increase up to 100%RH. Be
sure to restore standard conditions inside the chamber such as +23℃once a test is completed and remove specimens.
- Caution -
1. Please consult us for required installation space if optional items such as cable port are added.
2. If the humidification water direct feed system (optional: directly connected to tap water or to the purifier) is used,
600mm or more is required at the back of the chamber.

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Countermeasures 3 Try not to open the door while a low temperature test is being performed (below dew-point temperature)
so that specimens are not exposed to open air.
[Example] When the environment is 23 ℃/65%RH, the dew-point temperature is 16 ℃. Under this circumstance, if the door is opened
when the temperature inside the chamber is below 16℃, the internal surface of the chamber and specimens will condensate.
Countermeasure 4 Do not place specimens carelessly inside the chamber when a temperature/humidity test is performed
(below dew-point temperature).
[Example] When a test is performed at 40℃/80%, the dew-point temperature inside the chamber is 35.9℃. Under this circumstance, if the
specimens which have a surface temperature of less than 35.9℃are placed inside the chamber, these specimens will
condensate. (It is presumed that inside the chamber is kept at 40℃/80% for a while after the door is opened.)
○Place specimens in such a manner that the air circulation in the test area is not obstructed.
Air inside the chamber is forcibly circulated in order to keep temperature (humidity) uniform. Blocking the airflow will affect
uniformity of temperature (humidity).
-Caution -
Placing too many specimens inside the chamber to the extent that airflow is blocked in the area will affect the air circulation, leading to
partial overheating around the thermal heater area, and this will cause Er01 (overheat) to occur.

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●Handling Instructions
○Do not repeatedly turn on and off the power switch of the main body.
Excessive turning on/off of the switch during an operation may cause failure of the device.
○In order to protect specimens, be sure to set the overheat protector.
If the setting is not performed, an operation will not stop even if the temperature inside the chamber is abnormal until it exceeds 110℃(180℃for
150℃specification models).
○Set +5 ℃or higher temperature as the upper temperature limit (main controller built-in function).
If the limit is too low, the chamber may temporarily malfunction due to control failure.
○The USB connector is only meant for a USB memory.
Do not connect and charge other devices (such as a tablet PC or a handheld device). Depending on the specifications of the connected
device, the WEB board may fail due to current surge.

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Schedule 1 [Extracted from “Industrial Safety and Health Law, Enforcement Order Article 6, Attached Table”]
○Explosive Substances
①Nitroglycol, nitroglycerine, nitrocellulose, and other explosive nitrate esters.
②Trinitrobenzene, trinitrotoluene, picric acid, and other explosive nitro compounds
③Peracetic acid, methyl ethyl ketone peroxide, benzoyl peroxide, and other organic peroxides
④Sodium azide and other metal azides.
○Flammable Substances
①Combustibles
・Metal "lithium", metal "potassium", metal "sodium", yellow white phosphorus, phosphorus sulfide, red
phosphorus, celluloids, calcium carbide, lime phosphide, magnesium powder, aluminum powder,
other metal powders, sodium dithionite (or hydrosulfite).
②Oxides
・Potassium chlorate, sodium chlorate, ammonium chlorate, and other chlorates.
・Potassium perchlorate, sodium perchlorate, ammonium perchlorate, and other perchlorates.
・Potassium peroxide, sodium peroxide, barium peroxide, and other inorganic peroxides.
・Niter, sodium nitrate, ammonium nitrate, and other nitrates.
・Sodium chlorite and other chlorites.
・Calcium hypochlorite and other hypochlorites.
③Ignitables
・Ethyl ether, gasoline, acetaldehyde, propylene oxide, carbon dioxide, and other substances that
ignite below 30℃.
・N-hexane, ethylene oxide, aetone, benzene, methyl ethyl keton, and other substances that ignite between
-30℃and 0℃.
・Methanol, ethanol, xylene, normal pentyl acetate (or normal amyl acetate), and other substances that ignite
between 0℃and +30℃.
・Tung oil, diesel oil, turpentine oil, isopentyl alcohol (or isoamyl alcohol), acetic acid, and other substances that
ignite between 30℃and 65℃.
④Flammable gases
・Hydrogen, acetylene, ethylene, methane, ethane, propane, butane, and other substances that turn into
gas at +15℃, 1 atm and are flammable.
[Extracted from “Industrial Safety and Health Law, Enforcement Order Article 6, Attached Table 1”]
- Caution -
Placing explosive substances, flammable substances, or other substances containing materials indicated in Schedule 1
inside the chamber may cause an explosion. We will not bear any responsibility related the risks of dangerous
specimens used.

18
●Operating Instructions
○Instantaneous voltage drop
When voltage of the main power suddenly drops due to a lightning, etc., the connected PC may be affected. In order to avoid
such a circumstance, it is advisable to use a UPS for your PC.
○Discharge humidification water from the subtank if temperature/humidity operation is not performed for
more than two weeks.
Discharge humidification water from the subtank if temperature/humidity operation is not performed for more than two weeks. If not, bacteria
may breed inside the tank.
○Do not operate the chamber without closing back/side service panels.
Otherwise, electrical shocks, burns, and injuries may be caused.
○When the chamber is operated with temperature setting only, humidity is not controlled.
For the specimen that requires strict humidity control, please make sure to set the humidity as well.
O Be sure to maintain humidification water pressure between 0.07MPa and 0.5MPa. (In the case of the
humidification system direct connection circuit which does not use a water tank.)
If water supply pressure is too low, water will not be supplied smoothly. On the other hand, if the pressure is too high, leakage
may occur.
O Make sure to use clean humidification water such as ion-exchanged water with an electric conductivity of
less than 0.1 to 10μS/cm or pure water.
If normal tap water is supplied directly, the life of the humidification heater or wick gauze may become significantly shorter.
【Remark】
Quality of humidification water will greatly affect the life of various components inside the chamber as well as reliability test results.
Deterioration of water quality will cause scale to deposit inside the humidifying pan, shortening the life of the humidification heater.
At the same time, water absorbency of a wick will weaken, resulting in larger measurement deviation of humidity. (See below)
Adverse effect caused by deterioration of humidification water or wet bulb water
Deterioration of
humidification water
or
wet bulb water
Corrosion of humidification heater
Poor water
supply/drainage of
the water circuit
Increased humidity uncertainty
Acidification of the atmosphere inside the chamber
Scattered scale
・Shortened service life of
equipment/instruments
・Malfunctioned
equipment/instruments
・Varied test results
Corrosion of the chiller
Deterioration of wick
gauze

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Fire Alarm
Hot Air
○Countermeasures to prevent overheating and overcooling while temperature is increasing and decreasing
If the shortest temperature ramp-up or ramp-down time is set during a program operation, temperature will increase or decrease
with the maximum capacity to reach the target temperature. Therefore, there is a possibility of overshooting or undershooting the target
temperature by about 1 to 2℃when the set temperature/humidity is reached. This problem can be prevented by setting the ramp-up or
ramp-down rate slower than 0.5℃/minute. Please note that releasing the delayed humidification function of a local control
operation will cause the temperature to increase or decrease with the maximum ramp-up or ramp-down rate in order to reach the
target temperature.
○Do not open and close the door during a high temperature/high humidity
operation.
Opening the door during high temperature/high humidity tests may cause the following
dangers.
・Hot air may blow out and burn your skin.
・As the internal surface of the door is heated, you may burn your skin by touching it.
・Installing this device just below a fire alarm mounted on the ceiling may cause the
alarm to accidentally activate.
○Do not unnecessarily open and close the door during a low temperature operation.
Opening the door during low temperature tests may cause the following dangers.
・Temperature may increase and exceed the set upper limit, causing Er09 to be displayed and the operation to be
stopped.
・Specimens will condensate.
・The frost on the surface of the chiller inside the chamber will grow.
○Take necessary precautions to prevent condensation inside the chiller when temperature inside the
chamber is less than O +35℃(See P.41 Defrosting method).
In order to maintain the temperature/humidity, a chiller (evaporator) is placed inside the chamber. This chiller consists of numerous
aluminum boards which are overlapped in a several millimeter pitch, and its surface temperature is very low (-45℃to 0℃) when the temperature
inside the chamber is between -40℃and +35℃. Because air inside the chamber repeatedly passes through these aluminum boards,
moisture inside the chamber develops into frost on the surface of the chiller and then gradually becomes bigger to form ice.
This ice will cover the cold surface of the chiller, or block air circulation, deteriorating the heat exchanging performance of the
chiller, and as a result, cooling or dehumidification performance will be affected. These frost formations of the chiller will more
commonly happen in the following cases.
・The door is opened / closed during a low temperature operation, or a cable port is not properly sealed allowing external air
to enter.
・Temperature/humidity operation at below 35℃(Because humidification steam will form frost on the surface of the chiller, long hours of
continuous operation is not recommended. If such a test is necessary, please consult us.)

20
●Precautions for disposal
(recovery and decomposition of fluorocarbon refrigerant）
The fluorocarbon refrigerant used in the refrigeration circuit of this chamber must be recovered and decomposed according to the Fluorocarbons
Recovery and Destruction Act (a law which stipulates the collection and the decomposition of fluorocarbons used in certain products).
In order to control discharge of fluorocarbons into the atmosphere through proper recovery and destruction, it is prohibited to
discharge three types of fluorocarbons; chlorofluorocarbon (CFC), hydrochlorofluorocarbon (HCFC), and hydrofluorocarbon
(HFC) which are used for commercial-use air conditioners as refrigerants, into atmospheric air. At the same time, recovery and
destruction of these fluorocarbons at the time of disposal of a device, introduction of a device disposal procedures control system
(to document detailed procedures on disposing fluorocarbons), and clarification of responsibility for collecting old refrigerant at
the time of maintenance are required under this law. Because necessary procedures need to be carried out by professional
contractors who are certified by the refrigerant recovery office of each local government, please contact our customer support
center at the time of disposal.
■List of Standard Accessories
Name of accessories
Quantity
Specifications
Model
FX
FL
Water tank
1
Capacity: 10 liters
〇
×
2
FX430
FX730
Shelf board bracket
2
SUS304
〇
〇
Shelf board
1
SUS304 3 mesh netting
〇
〇
Gauze wick
1
12 pieces
〇
〇
Operation Manual
1
Digest version
〇
〇
Electrical diagram
1
〇
〇
Test certificate
1
〇
〇