xtemp UXP 8011-HC090 User manual

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XTEMP ENVIRONMENTS (SHANGHAI) CO., LTD.
BUSINESS CENTER: ROOMS 501-508, 5/F, NEW XUHUI BUSINESS CENTER, NO 33 RIHUI LIUCUN,
XIETU ROAD, XUHUI DISTRICT, SHANGHAI, 200032, CHINA
TEL.: [phone] FAX: [phone]
EMAIL: [email protected]
XTEMP ENVIRONMENTS (SHANGHAI) CO., LTD.
ADD: ROOMS 909-11, NO 2777 ZHOUHAI ROAD
PUDONG NEW DISTRICT, SHANGHAI, 200137, CHINA
TEL.: [phone] XTEMP
EMAIL: [email protected]
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Operating Instructions
Immersion heating circulators
UXP 8011-HC090
UXP 8011-HC130
UXP 8011-HC250

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XTEMP ENVIRONMENTS (SHANGHAI) CO., LTD.
http://www.xtemp-usa.com/1/ 31 DSGO0708-2-V211119/UXP8011-CD6400/CLASS I/NFL/RT+5~+100°C
Contents C
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Preface.............................................................................................. 3
Chapter 1 Safety Warning and Instructions................................... 5
1.1 Normal operating environment ............................................................................................................5
1.2 Safety warning ...........................................................................................................................................5
1.3 Caution ........................................................................................................................................................6
Chapter 2 Installing and Operating ............................................. 10
2.1 Installing .....................................................................................................................................................10
2.1.1 Unpacking .............................................................................................................................................10
2.1.2 Installing ..................................................................................................................................................11
2.1.3 Connecting to an application system where necessary .........................................................12
2.2 Descriptions..............................................................................................................................................12
2.2.1 Front view...............................................................................................................................................12
2.2.2 Back view...............................................................................................................................................13
2.2.3 The immersion controller ....................................................................................................................14
2.2.4 External circulating kit.........................................................................................................................14
2.2.5 Accessory cooling coil (Optional) ..................................................................................................15
2.2.6 Put into operation................................................................................................................................15
Chapter 3 Controller Descriptions and Operation...................... 17
3.1 Controller panel.......................................................................................................................................17
3.1.1 Display for temperature and working parameters.....................................................................17
3.1.2 Working status indicating ..................................................................................................................19
3.1.3 The key functions and navigate the menu ..................................................................................19
3.2 Set the working parameters.................................................................................................................21
3.3 Constant temperature control............................................................................................................22
3.4 Absolute temperature calibration (ATC)..........................................................................................24
3.5 Setting for restart mode after power failure, Auto ........................................................................24
3.6 Timer for automatic starting (optional).............................................................................................24
3.7 Timer for automatic terminating (optional) .....................................................................................25
3.8 Temperature Programming (optional)..............................................................................................25
3.9 Set default parameters .........................................................................................................................26
3.10 Terminate operating ............................................................................................................................26
3.11 Unit of temperature..............................................................................................................................26
Chapter 4 Maintenance................................................................ 27
4.1 Regular maintenance ...........................................................................................................................27

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Contents C
4.2 Regular check of the STB ......................................................................................................................27
4.3 Checking and replacing the fuse ......................................................................................................28
4.4 Clear error, warning and alarm ..........................................................................................................29
Chapter 5 Equipment Overview and Specifications .................. 30
5.1 Equipment overview ..............................................................................................................................30
5.2 Specifications...........................................................................................................................................31
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Preface P
Preface
In order to make the equipment fully functional and ensure safety of the operator, the
equipment, property and specimen, read this manual carefully and completely. When you
have any question that cannot be explained by this manual, consult your local distributors or
supporting technicians. It is our pleasure to provide service for you.
General safety notes
The equipment is designed for operation with non-flammable heat transfer liquids only!
No silicone oil is allowed for use with this series of the equipment. The internal silicone rubber parts
may swell when in contact with silicone oil resulting in leakage of the liquid! For engineering
change related to the use of silicone oil or other liquid, consult Xtemp engineer!
The equipment is intended for heating, conditioning of specimen and/or application system by
immersion in or external circulating of the liquids. This leads to potential hazards of high or low
temperatures, fire, and the general hazards related to the application of electrical energy.
The operator is largely protected through the application of the appropriate standard
specifications.
Further hazard sources may arise from the type of material being treated, e.g. mixing, dissolving,
reacting and resultant excessive energy, liquid spillage resulting from immersion or removal
of the specimen, and by the fracture or rollover of the container and reaction with the heat
transfer liquid.
It is not possible to cover all possibilities; they remain largely within the responsibility and the
judgment of the operator!
The equipment must only be used as intended and described in these Operating Instructions. This
includes operation by suitably trained qualified personnel.
The maximum temperature deviation both in normal condition and in electro-magnetic
interference field according to IEC 61326-1 is ±0.2 °C.
Classes of the EMC standard IEC 61326-1
Class A: Equipment for operation only on networks without connected domestic areas;
Class B: Equipment for operation on networks with connected domestic areas.
Important symbols
For your safety, pay attention to these important symbols as follows, during moving, installing
operating and maintenance. The equipment is designed for safe operation because of your
attention!
Caution, Class A equipment must not be operated on power networks with connected
domestic areas!

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Preface P
Warning, possibility of electric shock!
Inappropriate operation may cause hazard of electric shock and result in serious personal injury
or death!
Caution, hot surface or area!
Accidental touching or approaching may cause burn hazard!
Symbols on the equipment
Warranty
Requirements for warranty
Xtemp Environments warrants the operational safety and functions of the equipment only under
the conditions that:
the equipment is operated and serviced exclusively in accordance with its intended
purpose and as described in these Operating Instructions;
the equipment is not modified;
only original spare parts and accessories that have been approved by Xtemp
Environments are used;
inspections and maintenance are performed at the specified intervals.
The warranty is valid from the date of delivery to the operator.
Caution, important note, and always refer to Operating Instructions (this document) for detailed
information!
The equipment must be operated by well-trained qualified personnel only!
Wrong operation may cause personal injury, damage and/or mal-function of the equipment!
Observe operating instructions!

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Chapter 1 Safety Warning and Instructions 1
Chapter 1 Safety Warning and Instructions
1.1 Normal operating environment
The equipment is designed for safe operation under ambient conditions as follows:
indoor use;
altitude up to 2,000 m;
temperature 5 °C to 40 °C;
maximum relative humidity 80 % for temperatures up to 31 °C decreasing linearly to 50 %
relative humidity at 40 °C;
mains supply voltage fluctuations up to ±10 % of the nominal voltage;
transient overvoltage up to the levels of overvoltage category II;
temporary overvoltages occurring on the mains supply;
Pollution degree 2 or less of the intended environment;
Wet location
Excessive high or low temperature and/or humidity will significantly degrade electric safety of
the equipment!
Note the effect of the altitude on the boiling point of the heat transfer liquids!
1.2 Safety warning
When heating and conditioning with specimen or application system which is intrinsically
explosive, flammable or toxic or, which liberates hazardous substances as result of reacting,
dissolving or mixing under operating temperature range for normal use, safety acts and
regulations for the particular chemicals and experimental laboratory shall be observed!
Not applicable for specimen or application system which develops tremendous energy as
result of reacting, dissolving or mixing under operating temperature range for normal use!
The dielectric strength of the equipment may be degraded if after transport or storage in
humid conditions. The equipment shall be powered as for normal use and conditioned at its
maximum operating temperature or 105°C, whichever is smaller, for at least 1h before
commissioned for normal use. Warning, hazard of electric shock during the dry-out!

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Chapter 1 Safety Warning and Instructions 1
1.3 Caution
Caution, Risk of burn hazard!
Do not touch or approach parts or area with high temperature, for example, bath cover and
the heat transfer liquid when maintained at operating temperature over 60°C!
Pull the temperature of the heat transfer liquid as close as possible to the ambient before
attempting to shut down the equipment, except when operations as such are prohibited for
the specimen! Warning, Hazards of burn and possible electric shock resultant from unattended
hot temperature or condensing and degraded dielectric strength!
The minimum distance away from the ventilating holes at the back of the equipment to the
wall, furniture or other installations shall be 300mm! The inlets of fresh air and outlets of
exhausting air of the equipment shall be kept clear of any obstacles.
Keep the equipment away from hot-air emitting source, direct sunshine, strong magnetic field
and electric sparks!
Neither contamination of high concentration dust or corrosive gas, nor strong airflow surrounds!
Voltage, frequency and current for power supply must meet the requirements as designated
on the nameplate! Use power socket matching the power plug of the equipment. Hot line（L）
and neutral line（N）for single phase equipment must not be reversed!
For possible wet location conditions, where cycle of evaporating and condensing, overflowing
or spillage may occur and for protection against hazard of possible electric shock, use power
socket with appropriate IP protection and additional residual current circuit breaker (RCD) with
rated breaking capacity!
Socket for power supply must be equipped with protective ground (PE) to prevent against
hazard of possible electric shock!
Connect the power from behind the equipment. Plug in and remove the cable by directly
holding the plug. No dragging of cable in any part. Protect the cable from being damaged by
contacting with the hot surface of the equipment or mouse etc!

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Chapter 1 Safety Warning and Instructions 1
Caution, Hazard of overflowing or low level!
Never attempt to initiate the equipment if no heat transfer liquid is filled or filling volume is lower
than the minimum level as specified; Never move the equipment if the bath tank is fully filled
with the heat transfer liquid; The liquid level may change with the heating and cooling of the
equipment, and with the immersion or removal of the specimen!
Class I/NFL Caution, Risk of fire!
The Class I/NFL series of the equipment is designed for operation with non-flammable heat
transfer liquids only! Water and mixture of water and glycol are the most popular non-
flammable heat transfer liquids appropriate for the equipment.
No silicone oil is allowed for use with this series of the equipment. The internal silicone rubber
parts may swell when in contact with silicone oil resulting in leakage of the liquid!
Class III/FL Caution, Risk of fire!
The Class III/FL series of equipment are designed for operation with non-flammable and
flammable heat transfer liquids! Alcohol and silicone oils are the most common flammable
heat transfer liquids. Use special care when using with these flammable liquids, including the
proper setting of the adjustable overheating protection device.
The circulation of the heat transfer liquid is important for performance and safety! The
kinematic viscosity, immersion and distribution of the specimen and, flow resistance of the
application system and the circulating tubing significantly influence the circulation of the
liquid!
The first time commissioned for use or when exchange of the heat transfer liquid and,
immediately after startup of the circulating pump, check if any liquid leakage exists in the
external circulating tubing and fitting, if head pressure of the pump and flow of the heat
transfer liquid are in their rated range and, if the liquid level is in its range for safe operation!
Mixing and use of heat transfer liquids with different physical and/or chemical properties may
adversely affect the performance and safety of the equipment! The liquid shall be completely
drained and removed before attempting to charge the other. When necessary, consult Xtemp
or supplier of the liquid for particular application!
Never touch or attempt to handle the heat transfer liquid with temperature higher than +60°C!
Caution, burn hazard!
No draining of the heat transfer liquid with potential of chemical or biological hazard! Collect
and identify the heat transfer liquid for future use! Consult Xtemp or manufacturer of the liquid
for proper disposal!

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Chapter 1 Safety Warning and Instructions 1
Install an extraction system over the bath opening, if the operating of the equipment could
lead to liberation of hazardous air or gas mixture, for example the evaporation of the heat
transfer liquid! The rating of the fume hood shall be at least the maximum possible exhausting
temperature! If necessary for safety, additional temperature limiting and warning devices,
condensate accumulator shall be installed for the extraction system!
Caution: Note the following when connecting the equipment to an external application system:
1. The external circulating pipe, including flexible tubing and hose, shall be connected only
after the equipment and application system are well seated and installed. The length and
distribution path shall be as short as possible and be so arranged that no kink and other
mechanical stress develops during normal use which otherwise may result in thermal and/or
liquid hazards!
2. Flexible hose, fitting and coupling are important for the safe operation of the equipment;
Use only hose, fitting and coupling provided with the equipment or recommended by
Xtemp!
3. The ratings of pressure and temperature for the hose, fitting and their resistance to the
chemicals shall meet the requirements of the operating temperature, pressure range of the
heat transfer liquid to be delivered for the jacket, container or heat exchanger of the
application system!
4. Thermal insulation for hose, fitting, coupling and the application system are important for
performance and safety! The materials of the insulation shall meet the requirements of the
maximum operating temperature range!
5. If no external circulating is necessary, use hose, fitting and coupling to short-circuit the liquid
connections as for an external application!
Keep the cables and wiring protected by conduit and/or hose and well secured; keep them
clearly away from direct contact with any exposed heated/cooled parts of the equipment
and application system!

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Chapter 1 Safety Warning and Instructions 1
The maximum filling volume or cooling capacity of an open bath or refrigerated bath for
movable immersion circulator shall be 25L and 600W. The fixing and connection for the
immersion circulator, external circulating adaptor and the bath must be secured and
hydraulically tight. Bath cover should be used where necessary to reduce the effect of
evaporation of the liquid on the electronics of the circulator.
Caution: smaller bath may develop hazard of overflowing, and leakage or slipping-off of the
circulating tubes may cause hazard of spillage or spray! Excessive volume or capacity may
degrade specifications for temperature control!
Before attempting to remove the immersion circulator away from the bath, always unplug the
equipment and wait until the temperature recovers close to ambient and note the following:
1. Don’t touch the heated surface or any parts with hot residual liquid or, put it on surface of
flammable or temperature sensitive materials! Warning, Risk of burn hazard!
2. Don’t touch the frozen surface or any parts with cold residual liquid! Warning, Hazard of
frostbite!
Caution, Hazard of possible electric shock when removed and placed in horizontal or up-side
down conditions and if the heat transfer liquid penetrates to electrical assembly resulting in
deterioration of the insulation!
Caution: Risk of frozen hazard!
When water is employed as heat transfer liquid, and when intended for standstill for long
period and when experiencing low ambient is possible, run the equipment at operating
temperature close to ambient for at least 1hr. Empty the bath containing water, and remove
the water completely. Disconnect the equipment and remove the mains plug from power
source.
Do not disassemble or exchange assembly parts and electric circuits by unauthorized
personnel! Hazard of possible electric shock! In case of repairing, contact your local distributors
or supporting technicians.
Always remove the mains plug from the socket before cleaning, moving, maintenance or
repairing!
The first time powering up after repairing or standstill for long period, or at designated intervals
under normal use, check the functionality of the following parts or components:
Hydraulic tightness and fastening of drain device at three months intervals;
Cutoff capability of the safety temperature limiter (STB) at 6 months intervals.

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Chapter 2 Installing and Operating 2
Chapter 2 Installing and Operating
2.1 Installing
2.1.1 Unpacking
Unpack the equipment and sort the accessories respectively and carefully. The packing carton,
pallet, packing buffering stuffs etc., are designed for one shipment only. For future shipment,
prepare the packing materials as well as the way of packing as received.
Check the equipment and accessories for potential transport damages. If there is any damage
visible on the equipment, a claim must be filled in writing with the freight forwarder; a
notification to the freight forwarder is obligatory so that the shipment can be examined.
Inform your local distributor or supplier for any missing accessories and servicing or repairing.
Accessories lists (UXP8011-HC090)
Part Number Qty Descriptions Remarks
DSGO0708-2 1 Operating instructions This document
ERSG0202 1 Fuse (250V~, 15A), D5L20 Breaking capacity 1500A
BJGW0002 1 External circulating kit Assembled
SZGJ0104 1 Flow adaptor L silicone Assembled
SZGJ0115 1 Bypassing U tube silicone Assembled
BJGW0143 1 Bath cover assembly
Accessories lists(UXP8011-HC130)
Part Number Qty Descriptions Remarks
DSGO0708-2 1 Operating instructions This document
ERSG0202 1 Fuse (250V~, 15A), D5L20 Breaking capacity 1500A
BJGW0002 1 External circulating kit Assembled
SZGJ0104 1 Flow adaptor L silicone Assembled
SZGJ0115 1 Bypassing U tube silicone Assembled
BJGW0142 1 Bath cover assembly
Accessories lists(UXP8011-HC250)
Part Number Qty Descriptions Remarks
DSGO0708-2 1 Operating instructions This document
ERSG0202 1 Fuse (250V~, 15A), D5L20 Breaking capacity 1500A
BJGW0002 1 External circulating kit Assembled
SZGJ0104 1 Flow adaptor L silicone Assembled
SZGJ0115 1 Bypassing U tube silicone Assembled

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Chapter 2 Installing and Operating 2
BJGW0141 1 Bath cover assembly
Do not disassemble or exchange assembly parts and electric circuits by unauthorized personnel!
Hazard of electric shock!
In case of damaged shipment and dent, deformation or distortion of the enclosure, contact your
local distributor or supplier.
2.1.2 Installing
Install the equipment on a rigid, nonflammable surface and well-ventilated place. The bench
should be 600~800mm high for ease of operation. Keep enough space between wall and
back of the equipment, and keep clear of obstacles around the bottom of the equipment
for better ventilation. If the equipment is installed on an unstable surface or floor, abnormal
noise may be generated.
The voltage, frequency and current of the power supply must be rated at least the same as
those designated on the name plate of the equipment. The switch board is recommended
to be on the back right side of the equipment and equipped with outlet matching the
power plug of the equipment with protective ground (PE).
For possible wet location conditions, where cycle of evaporating and condensing, overflowing
or spillage may occur and for protection against hazard of possible electric shock, use
power socket with appropriate IP protection and additional residual current circuit breaker
(RCD) with rated breaking capacity!
Power socket, switchboard with circuit breaker or residual current circuit breaker for the
equipment shall be located closest to the equipment with good clearance for easy access,
so that immediate interruption is possible under emergent circumstance.
The minimum distance away from the ventilating holes at the back of the equipment to the
wall, furniture or other installations shall be 300mm! The inlets of fresh air and outlets of
exhausting air of the equipment shall be kept clear of any obstacles.
Keep the equipment away from hot-air emitting source, direct sunshine, strong magnetic field
and electric sparks!
Neither contamination of high concentration dust or corrosive gas, nor strong airflow surrounds!
Voltage, frequency and current for power supply must meet the requirements as designated
on the nameplate! Use power socket matching the power plug of the equipment. Hot line
（L）and neutral line（N）for single phase equipment must not be reversed!

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Chapter 2 Installing and Operating 2
Socket for power supply must be equipped with protective ground (PE) to prevent against
hazard of possible electric shock.
2.1.3 Connecting to an application system where necessary
The external circulating pipe, including flexible tubing and hose, shall be connected only after the
equipment and application system are well seated and installed. The length and distribution
path shall be as short as possible and be so arranged that no kink and other mechanical
stress develops during normal use which otherwise may result in thermal and/or liquid hazards!
Flexible hose, fitting and coupling are important for the safe operation of the equipment; Use only
hose, fitting and coupling provided with the equipment or recommended by Xtemp!
The ratings of pressure and temperature for the hose, fitting and the jacket, container or heat
exchanger of the application system, their chemical resistance to the heat transfer liquid shall
meet requirements of the operating temperature and/or pressure range of the heat transfer
liquid to be delivered by the equipment!
Thermal insulation for hose, fitting, coupling and the application system is important for
performance and safety! The materials of the insulation shall meet the requirements of the
maximum operating temperature range!
Keep the cables and wiring protected by conduit and/or hose and well secured; keep them
clearly away from direct contact with any exposed heated parts of the equipment and
application system!
2.2 Descriptions
2.2.1 Front view
Fig 1 Front view
02 Controller panel and power switch
05 Feet
18 Handle
20 Liquid connection, return
21 Liquid connection, outlet
76 Bath cove

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Chapter 2 Installing and Operating 2
2.2.2 Back view
Fig 2 Back view
03 Fresh-air inlets
04 Exhausting-air outlets
18 Handle
22 Power cable cord
23 Drain device
The inlets of fresh air and outlets of exhausting air of the equipment shall be kept clear of any
obstacles, so that no close-loop of the air circulating may develop.
If no external circulating is necessary, use hose, fitting and coupling to short-circuit the liquid
connections as for an external application system!
The equipment is not applicable for specimen or application system which develops tremendous
energy as result of reacting, dissolving or mixing under operating temperature range for
normal use! However for temperature below ambient until minimum temperature range of
the controller, optional cooling coil must be employed with additional external cooling source
available.

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Chapter 2 Installing and Operating 2
2.2.3 The immersion controller
Fig 3 The immersion controller
42 Temperature sensor Pt100
43 Circulating return
44 Circulating discharge outlet
45 Heating coil
47 STB (independent overheating device)
2.2.4 External circulating kit
Fig 4 External circulating kit
101 Liquid connection assembly, XT5618A
102 U-type silicone liquid shortcut
103 L-type silicone adaptor, LL
104 L-type silicone adaptor, SL
The connection to the pump outlet and external circulating kit shall be hydraulically tight! Loose
connection may result in hazard of liquid spray!
The pump inlet shall be clear of any obstacles! The minimum distance for the pump inlet to the
bath bottom shall be 20 mm. Sometimes a piece of paper mark from the specimen, gauze or
collection of dirt may block the flow of the pump and circulation, resulting in degradation of
performance and overheating!
The flow rate and direction at the external circulating return may also influence the performance
and safety of the equipment! Reduced flow may produce an uneven circulating of the liquid
and temperature distribution, while strong circulating may lead to overflow or splash of the

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Chapter 2 Installing and Operating 2
liquid! Flow
adaptor or limiter may be used for proper adjustment of the flow rate and direction.
Regular check of the STB and, level switch if equipped, is requirement for safety. Refer to 4.2 for
detailed procedures.
The first time powering up after repairing or standstill for long period, or at 6 months intervals
under normal use, check the functionality of the following parts or components:
Cutout capability of the safety temperature limiter (STB)!
Low level cut-out if equipped!
2.2.5 Accessory cooling coil (Optional)
Fig 5 Cooling coil
For immersion heating bath (GP series) and circulators completed with open bath tank, the
minimum operating temperature of the equipment is limited to 5-10 °C above ambient
temperature, dependent on the pump pressure and flow rate, as well as the immersed
specimen or connected application system. For operating temperature close to or below
ambient, cooling coil is recommended to extend the temperature range and optional
accessory.
2.2.6 Put into operation
Use non-flammable heat transfer liquid only!
Fill the bath tank with applicable heat transfer liquid to a level appropriate for operation. Keep in
mind that the level may change with the heating and cooling of the equipment, and
immersion and removal of the specimen.
If an application system is connected, additional liquid may be necessary for appropriate level
once initiated.

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Chapter 2 Installing and Operating 2
Class I/NFL Caution, Risk of fire!
The Class I/NFL series of the equipment is designed for operation with non-flammable heat
transfer liquids only! Water and mixture of water and glycol are the most popular non-flammable
heat transfer liquids appropriate for the equipment.
No silicone oil is allowed for use with this series of the equipment. The internal silicone rubber parts
may swell when in contact with silicone oil resulting in leakage of the liquid!
Class III/FL Caution, Risk of fire!
The Class III/FL series of equipment are designed for operation with non-flammable and
flammable heat transfer liquids! Alcohol and silicone oils are the most common flammable
heat transfer liquids. Use special care when using with these flammable liquids, including the
proper setting of the adjustable overheating protection device.
Caution, Hazard of overflowing or low level!
Never attempt to initiate the equipment if no heat transfer liquid is filled or filling volume is lower
than the minimum level as specified; Never move the equipment if the bath tank is fully filled with
the heat transfer liquid; The liquid level may change with the heating and cooling of the
equipment!
Disconnect the application system from the equipment only after proper draining of the heat
transfer liquid, especially when the application system is charged to maximum volume by
additional filling of the liquid! The liquid level will change significantly with the immersion or
removal of the specimen!

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Chapter 3 Controller Descriptions and Operation 3
Chapter 3 Controller Descriptions and Operation
3.1 Controller panel
Fig 6 Controller panel
60 Reset button (for resetting when alarming, the
circle indicating the location)
61 Display for temp and working parameters
62 Status indicators
63 Key board
64 Power switch
3.1.1 Display for temperature and working parameters
Normally it displays the equipment temperature once switched on and initiated or oFF when
standstill.
Other possible symbols include: SEt, Ht, Lt, CooL, Auto, Atc AS, ASd, cF, dEFt, ESc, Stb.
Related definitions are as follows:
SEt: Setting of working temperature, must be 5 °C higher than low limit Lt and 5 °C lower than
the high limit Ht. The temperature setting beyond the scope will not be accepted.
Ht: This parameter is an absolute value and used for reminding only. When temperature in the
equipment is higher than the SEt value, Ht is displayed. The controller will trigger a beeping
alarm and disable the heating. While the actual temperature is higher than the Ht setting, the
Ht may be set to a higher value by pressing so that Ht beeping can be cleared. If the
actual temperature is recovered to lower than the Ht setting, the Ht alarm will disappear
automatically with seconds of delay, or may be cleared immediately by pressing . The
heating is possible only if the Ht is cleared.
Lt: This parameter is an absolute value and used for reminding only. When temperature in the
equipment is lower than the SEt value, Lt is displayed. The controller will trigger a beeping
alarm. While the actual temperature is lower than the Lt setting, the Lt may be set to a
lower value by pressing so that Lt beeping can be cleared. If the actual temperature is

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Chapter 3 Controller Descriptions and Operation 3
recovered to higher than the Lt setting, the Lt alarm will disappear
automatically with seconds of delay, or may be cleared immediately by pressing .
CooL: Control parameter for compressor, and select among three modes, Auto, on and oFF:
on：Compressor cooling with counter heating by PID, provided that the actual
temperature is below 40 °C.
Auto：Compressor on and off automatically. During heating up, once full heating is
necessary, the compressor will be turned off, until the actual temperature close to set
temperature. if the set temperature over 40 °C, and no cooling is required, the
compressor will also be turned off. If the set temperature is lower than the actual
temperature, and when the actual temperature below 40 °C, the compressor will be
switched on and keep working continuously.
oFF：The compressor is disabled, and the heater is regulated by PID.
Auto: Select between AoFF and Aon, which means manually starting and automatically starting.
Atc: Absolute temperature calibration (ATC), when the temperature displayed differs from the
temperature measured by a standard thermometer, ATC is used to calibrate the display.
AS: Timer for automatic startup. Valid only when the equipment is in standby mode. The
equipment will be initiated automatically once the set time elapses. The equipment may be
started immediately if is operated regardless of the remaining AS time.
ASd: Timer for automatic shutdown. Valid only when equipment is in operating mode. The
equipment will be terminated automatically once the set time elapses. The equipment may
be terminated immediately if is operated regardless of the remaining ASd time.
cF: Shifting of the temperature measurement units. cmeans Centigrade and Fmeans Fahrenheit.
cF setting affects all the parameters related to temperature, such as the display temperature,
setting temperature, Ht, Lt and so on. Relationship between cand Fis as follows
°F=32+1.8×°C, °C=(°F-32)/1.8
For example: 0 °C=32 °F, 212 °F=100 °C.
dEFt：Return to the factory default setting. It may be used when system halts or any other
abnormal situation occurs.
ESc: Exit the SEt menu.

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Chapter 3 Controller Descriptions and Operation 3
3.1.2 Working status indicating
Heater: Press for more than 2 seconds to initiate the circulating pump. Orange LED will be
steadily lit with full power heating; When LED flashes, the heating power is automatically
adjusted to meet actual need. LED flashing frequency keeps constant when temperature is
stabilized.
Compressor: Not applicable for this series of equipment.
Circulating pump: Press for more than 2 seconds to initiate the circulating pump with LED
on, after which the heating operation is possible.
Alarm: Red LED is on, when there is beeping and warning for safety or error is triggered.
The warning or error of the sensor may be accompanied by the following:
Ht：When temperature in the bath is higher than the set value, Ht is displayed
Lt：When temperature in the bath is lower than the set value, Lt is displayed
Er01: Warning of temperature sensor short-circuit.
Er02: Warning of temperature sensor open-circuit.
ourh: Warning of the bath temperature far beyond Ht.
Stb: The independent safety temperature limiter (STB) is triggered; Press (Fig 6-60)
and to reset.
3.1.3 The key functions and navigate the menu
There’re 6 keys as follows. The function and their operation are summarized and listed in the table:
KEY NO FUNCTION OPERATION REMARKS
1
Initiate or
terminate the
temperature
control
Press and hold the
key for more than 2
seconds
Temperature regulating is possible only if the
circulating pump is activated and
temperature control is initiated.
2
Set the working
temperature
Press the button for
less than 1 second
SEt is first displayed, then press to enter,
change the digits by pressing ,
accept the setting by pressing .