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Physiological - Biological Temperature Controller
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2. special fault diagnostic features An external temperature sensor DS18S20 from Dallas Semiconductor can be connected to the Physiological Biological Temperature Controller There is such a tailored sensor in plastic enclosure with 1 5 meter BNC cable in our standard product choice On the back side of the Controller the actually used sensor can be selected with a simple switch However we do NOT RECOMMEND using the external temperature sensor It is possible to eliminate the usage of the external temperature sensor because in every heated object manufactured by Supertech there is a built in internal temperature sensor Please do NOT use the external sensor except under particular circumstances There are a few reasons why it should not be used in most of the applications 1 The heat capacity and the thermal time constant of the heated objects are huge The thermal resistance of the external temperature sensor to the heated object is quite big in simple words usually there is a bad thermal connection These statements are true for the technically realized heated objects as our products and for the Heating Pad animal combinations as well These effects together result big hysteresis 6 8 Centigrade if you try to use an external sensor We tested it in many labs under very different circumstances but we could not find any hardware and or software trick to eliminate this effect As a good solution we developed a predictive learnin
3. 230 VAC mains system with the appropriate cable The connector at the middle of the back plate is the output connector There are three different connectors used for the different end stages respectively Use the appropriate plug to connect the output load or the complete heated object This is a principal question that a control process can be based on one sensor only This is the reason why a selector switch is located at the back side of the Physiological Biological Temperature Controller to select the actual sensor There are heated objects e g Stage Incubators Heating Pads etc in our choice which has got internal temperature sensors If you use such a heated object you should choose the Internal sensor with the switch located at the right side of the back plate In the other position of this switch the Physiological Biological Temperature Controller uses an External temperature sensor If an External sensor is used it should be connected to the BNC connector below the switch The DS18S 20 sensor chip manufactured by Dallas Semiconductor is accepted by the Physiological Biological Temperature Controller as an External sensor In our choice there are tailored DS18S20 sensors with cable and BNC plug The external temperature sensor if it is selected as the working sensor must be in very good thermal connection with the heated object to provide a low level of hysteresis and not to generate an
4. Physiological Biological Temperature Controller TMP 5x series User s Manual SUPE LECH The most important feature of the Physiological Biological Temperature Controller that it is optimized for microelectrode laboratories for seriously shielded environments Its output current is as smooth as the current of a lead battery with the 12 V FINE DC end stage see below This design fulfils all the special requirements of any sophisticated electrophysiology applications even in close position to any high impedance recording electrodes such as patch clamp setups General Description We have developed one Physiological Biological Temperature Controller construction but it can be built with three different power end stages depending on the power requirement of the thermal process under the control Naturally only one power end stage can be installed in a Physiological Biological Temperature Controller The price of the Controller does not depend on the kind of the power end stage installed in it You should choose the appropriate power end stage according to the requirements of your actual heating application before placing an order The Physiological Biological Temperature Controller is based on an internal microprocessor The microprocessor on the front plate talks with the user in an intelligent menu system The firmware in the built in microprocessor of the Controller realizes a semi switching control algorithm with a few
5. ature Controller is started with lost thermal connection e g the rectal sensor is not put into the asshole of the animal In the firmware there is a continuous comparison of the temperature setup value and the actually measured temperature If the difference is more than 5 Centigrade it means a fault condition The first heating cycle is an exception from this fault check because in the first heating up any difference is allowed There is an uncomfortable side effect of this protection aspect The setup temperature value should not be increased too quickly because it would be realized as an artificial thermal connection fault This protection is useful if the thermal capacity of the sensor is small but it is not fixed correctly e g rectal Warranty We give you full warranty service including rest parts for the period of 3 years by default Longer warranty periods can also be defined and agreed the actual conditions should be discussed before placing the order We repair the faulty equipments in our workshop The expense of the shipment should be covered by our customers International technical hotline by phone 36 20 9234 386 Technical hotline by email office super tech eu or office superte ch For further technical information please visit our website Supertech continuously uses two websites with the same content Please use that one which is easier for you to remember www superte ch and the other www super tech
6. e power version up to several kW It is optimal to control the temperature of great objects 24 V pulsing DC max 75 W It is a low voltage electrically secure version for general purposes 12 V FINE DC max 36W It is optimized for microelectrode laboratories for seriously shielded environments Its output current is as smooth as the current of a lead battery This power end stage fulfils all the special requirements of any sophisticated electrophysiology applications even in close position to any high impedance recording electrodes such as patch clamp setups Specifications The controlled temperature range O Centigrade to 120 Centigrade in 1 Centigrade steps The resolution of the measurement 0 1 Centigrade Hysteresis approximately 0 3 0 5 Centigrade The actual hysteresis depends on the thermal capacity and the heat drain used on the heated object Display 4 x 16 characters alphanumeric LCD with bright blue backlight Programming three pushbuttons on the front in menu system Automatic internal diagnostic algorithm in the firmware Flash program memory Non volatile EEPROM memory to store the parameters used last time Temperature sensor either in internal or external arrangement DS18S20 from Dallas Semiconductor Dimensions of the instrument 290 x 250 x 90 mm Mains voltage 100 120V or 220 230V chosen by an internal selector switch fixed in the factory Power consumption without output load the Phys
7. erature setup value will be asked by the firmware if you switch the Controller on with F button is pressed After selecting the temperature limit the firmware saves it if F button is pressed and the normal temperature control task is started This saved limit works every time in the normal control process Error messages There are sophisticated protection features built into the firmware One of them is a protection against the electronic fault in the circuit of the sensor The other protection features are implemented to deal with the faults around the thermal connection They realize the fact if the sensor can not detect the real temperature of the heated object They are specialized protections for the biological heating tasks because they will protect the sensitive living heated objects animals cells etc against overtemperature if the control procedure fails If any of the protection aspects became active any fault condition appears the Physiological Biological Temperature Controller stops the heating a rude beep noise is started and the fault is described on the LCD screen to inform the user about the details If any fault appears there is no other exit or solution than switching the Controller off repairing the fault and switching on again If there is more than one fault conditions appear in the same time the more serious one will be described on the screen Error message 1 FAULT can not find the
8. error message Functions in the firmware The firmware in the built in microprocessor of the Physiological Biological Temperature Controller realizes a semi switching control algorithm After switching the Controller on in the first few heating cycles the firmware measures the heat capacity and the thermal time constant of the object heated actually After measuring these values the firmware optimizes the parameters of the internal temperature control algorithm In this way the firmware tries to minimize the hysteresis After switching the Physiological Biological Temperature Controller on the microprocessor loads the default temperature setup value saved last time and it starts to heat up and control Any time during the control process the actual temperature setup value can be modified with the Up and Down button respectively The modified value will be the valid setup value but temporarily until the Physiological Biological Temperature Controller remains switched on If the modified setup value should be saved as the new default value it can be saved with pressing the F button After switching the Controller off and on again the last saved setup value will be appeared as the default There is a hidden function in the firmware It is useful if an inexperienced user works with the Physiological Biological Temperature Controller or if the heated object is very sensitive to overtemperature The highest selectable temp
9. g algorithm for the Physiological Biological Temperature Controller what software runs in the built in microcontroller This algorithm uses the internal temperature sensor what is built into the heated object This method results a stable fine regulation of temperature 2 The heated object in most of the labs is an animal The animal is not an iron cube it has got a built in biological temperature control system If the temperature regulation system works in the animal it disturbs the predictive algorithm running in the microcontroller of the Physiological Biological Temperature Controller because the regulation process in the animal is not synchronized to the software based control process 3 DS18S20 is one of the most sophisticated temperature sensors in the choice of the semiconductor manufacturers This is a real top model It communicates with the host microcontroller in a fully digital way on a 1 wire bus on standard TTL voltage level It is a professional sensor but it generates digital noise so it should not be placed in a highly sensitive shielded environment or in a tissue bath close to the working biological target 4 It is easier to prepare the tissue or the animal It is easier to arrange the tissue bath It is not necessary to keep the rectal or the bath sensor always clean and sterile 5 It is not necessary to buy an external temperature sensor The choice of the power end stages 115 230 VAC Hug
10. he cursor you can adjust the appropriate menu point or you can set that numeric value what is under the cursor F Function button Use it in the menu as enter during the programming and parameter setup actions When you are in a programming phase and the Function button works as enter the microprocessor automatically saves the newly selected value after the keypress When the equipment is actually working in a selected function the Function button can be used as escape to inactivate and leave the actual task and to jump to the main menu Furthermore there is a yellow LED on the front plate of the Physiological Biological Temperature Controller to show the heating periods It shows qualitatively the fact of the heating not the heating power The mains switch is also located at the right side of the front If the Physiological Biological Temperature Controller is switched off it is necessary to wait until the power supply looses all its energy It is prohibited to switch the Controller on again without waiting enough otherwise a faulty reset condition would happen even the internal software firmware can be destroyed The enough time before the Controller can be switched on again after switching off if the last screen content not the backlight but the letters disappears completely and 10 seconds more is spent The connectors and the switch at the back side There is the AC input plug at the left side Connect it to the 115
11. iological Biological Temperature Controller only 80 VA Weight 2 8 kg Security rules The equipment is supplied from the 115 230 VAC 50 or 60 Hz mains system This is a dangerous voltage All general electrical security precautions should be kept in mind during the usage of the equipment That pieces of Physiological Biological Temperature Controllers what are equipped with the 115 230 VAC Huge power end stage are especially dangerous equipments The output wires of such Controllers are driven by 115 230 VAC voltage The output wiring is made by the user or by an authorized technician so their professional quality and their electric security are not the responsibility of Supertech Ltd The electrical security aspects of the 115 230 VAC Controllers are completely under the sole responsibility of the user Front panel controls The equipment is assembled with a 4 x 16 character blue LCD display and a user friendly 3 button keypad on its front plate The development strategy of the Physiological Biological Temperature Controller was to design an easy to use user interface while highly professional capabilities are activated behind the simple menu system On the front panel of the Physiological Biological Temperature Controller there are only three buttons but with them you can do nearly all what you would like to do Up and Down buttons Use them to choose from the menu items and configure the values Where you see t
12. sensor The electronic circuit is bad This error message means that the protection algorithm detected that there is a short circuit or a broken wire in the circuit of the sensor In such cases the measured value can not be accepted and the control procedure should be stopped If you see this error message please try to find and repair the faulty wire or connector If the repairing attempt is not successful send the heating equipment or the external sensor to the repair service location of Supertech Error message 2 FAULT Thermal connection lost Sensor is improperly positioned There are two possible reasons which can generate this error message They are the followings In every heating phase immediately after the heating is switched on a local time counter is cleared to zero and started in the firmware and the actually measured temperature is recorded for later comparison During the counting the normal temperature control procedure is running If this counter reaches 3 minutes the actual temperature is checked again and compared to the initial value recorded at the beginning of the heating phase If the temperature difference is less than 0 5 Centigrade it means a fault condition This protection is useful if the thermal time constant or the heat capacity of the heated object is too big in comparison to the heating power This protection is useful in that case too if the Physiological Biological Temper
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