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Topic: Temperature control

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	Temperature Control Units for Process Heating and Cooling
		Temperature control units service only a single process at a time, but are designed to be moved between process applications as the need requires.
		Water temperature control units circulate water through the process and are used for applications were the required temperature ranges from 30° to 250°F. These units use a pump to circulate water through the process.
		Oil temperature control units circulate oil through the process and are used for applications were the required temperature ranges from 100° to 500°F. These units use a high flow pump to circulate high temperature oil through the process.
	www.advantageengineering.com /temperatureControllers (284 words)

	Temperature Encyclopedia Article @ NaturalResearch.org (Site not responding. Last check: 2007-10-12)
		Temperature is the physical property of a system which underlies the common notions of "hot" and "cold"; the material with the higher temperature is said to be hotter.
		It is a fundamental parameter in thermodynamics and it is conjugate to entropy.
		The temperature of a system at thermodynamic equilibrium is defined by a relation between the amount of heat δQ incident on the system during an infinitesimal quasistatic transformation, and the variation δS of its entropy during this transformation.
	www.naturalresearch.org /encyclopedia/Temperature (2662 words)

	The Heatsink Guide: DIY Temperature Control
		The temperature at which the CPU (or case) should be kept cannot be adjusted by the user.
		Also, coolers with a temperature control that can't be adjusted by the user are totally unsuitable for overclocking, since an overclocked CPU must usually be kept below a very precise temperature, at which it crashes.
		Before you start using the temperature control, the temperature at which the CPU (or case, etc...) should be kept must be set.
	www.heatsink-guide.com /control.shtml (1509 words)

	Temperature control (Site not responding. Last check: 2007-10-12)
		Proportional action temperature control is referred to as P or gain.
		Derivative action temperature control is referred to as D or rate.
		The controller measures the rate of the temperature increase and moves the proportional band to minimize overshoot.
	www.rkcinst.com /english/control_01.htm (494 words)

	Temperature Controller Home Page
		The temperature controller takes an input from a temperature sensor and has an output that is connected to a control element such as a heater or fan.
		On-off control is usually used where a precise control is not necessary, in systems which cannot handle having the energy turned on and off frequently, where the mass of the system is so great that temperatures change extremely slowly, or for a temperature alarm.
		Since temperature controllers are generally mounted inside an instrument panel, the panel must be cut to accommodate the temperature controller.
	www.omega.com /prodinfo/temperaturecontrollers.html (1046 words)

	humidity and temperature conditions \| humidity control
		For example, if the targeted condition is 23°C ±1°/50% RH ±2% and the recording device indicates a relative humidity control of +2%; instead of being within the required specification, it is certain that the requirement is not being met when uniformity and sensor accuracy are added to the control constancy.
		For example, if there are plans to cycle temperature and humidity, ensure that the humidity sensor is temperature compensated for the anticipated cycling range and that its accuracy does not shift with temperature.
		Control sensors should not be located down stream of major load producers or in the return duct.
	www.humiditycontrol.com /pgc-tappi.html (1499 words)

	AquaLab Water Activity: Temperature Control
		Temperature control appears to adhere to the calf-path metaphor by following where history has trod on a bumpy path.
		There are three reasons for sample temperature control with the AquaLab: 1) to minimize extreme ambient temperature fluctuations; 2) to compare water activities of different samples independent of any effects temperature may have on their water activity; and 3) to comply with special government or corporate regulations on temperature control for specific products.
		Since temperature can have a profound effect on the state of that matrix, (glassy vs. rubbery state) one should not be surprised that temperature affects the water activity of the food.
	www.decagon.com /aqualab/temperature.html (1053 words)

	Temperature Control
		When the temperature inside the compartment is above the setting on the thermostat, a switch is closed which applies AC power to the compressor, causing the air inside to cool down.
		An external temperature controller works in the identical fashion, in fact it is a thermostat.
		The temperature is adjustable from 20 degrees F to 80 degrees F - a much wider range than you'll ever need.
	www.hoptech.com /tempctrl.html (878 words)

	Adhesive, Sealant and Sealer Temperature Control Systems
		The St. Clair Systems Temperature Control System, also known as a Material Conditioning System, performs a valuable and unusual function: accurate temperature control of high pressure, high viscosity, dead end (intermittent flow) dispensing of adhesives and sealers where both heating and cooling are typically required.
		A temperature sensor located in the adhesive or sealer sends the material temperature to the PID controller, which automatically determines whether heating, cooling, or no action, is required.
		Temperature Control Units are available in one, two, three, or four circuit configurations.
	www.stclairsystems.com /tempcontrol.htm (508 words)

	Reactor Temperature Control
		Inputs to the controller are desired base temperature, measured base temperature, measured pressure in the reactor.
		Output signals of the controller adjust the heater and the electromagnetic valve for the cooling water in the reactor.
		In a fuzzy logic based control system, we can take many factors into account when creating the controller, some of these factors are considered to be noises in a conventional control system and make controller design a very hard work.
	www.aptronix.com /fuzzynet/applnote/reactor.htm (791 words)

	Temperature Control
		This value should be zero for BT-1, so that the temperature is set to the ``temperature start'' value at the beginning of the buffer execution and not changed again for the remainder of the buffer.
		Every time the temperature is changed, the system will pause the data acquisition until either the temperature is within the error specified by the Err field or until the wait time exceeds the maximum wait given in the Wait field.
		Set the temperature controller parameters to the given values, where n1 is the gain, n2 the rate, n3 the reset, and n4 the power range on many controllers.
	www.ncnr.nist.gov /programs/crystallography/icpref/node5.html (751 words)

	A Temperature Control System
		The temperature sensor is connected to a temperature control box.
		The temperature control box has a knob which allows the desired temperature for the room to be set.
		Now that the room has a temperature controller attached to both a heater and cooler, it can keep the room temperature constant under both hot and cold conditions.
	www3.fhs.usyd.edu.au /bio/homeostasis/Temp_Control_System.htm (348 words)

	Attaining proper temperature control, temperature measurement, and temperature testing.
		The accurate control or monitoring of surface temperature is a critical aspect of many process operations.
		The basis for accurate temperature control lies in the ability to accurately measure temperature either on the surface of a part (as in heat treating) or the ambient temperature around it during processing (sterilization for example).
		And because these temperature monitoring products are designed to react at a specific temperature or temperature range, there is no need for re-setting or calibration like there is with expensive electronic temperature control systems.
	www.tempil.com /temp_control.htm (245 words)

	WPA > Temperature Control
		Because of the higher initial viscosities of the waterless inks there is also a secondary heat generation in the roller train caused by the friction of milling the ink through the rollers.
		This heat is why press temperature control systems are required to allow for the precise control of temperature within the printing unit.
		The function of the temperature control system is to circulate enough coolant through the roller train to carry away the heat that is generated by the mechanical actions in the printing unit.
	www.waterless.org /Nbenefits/tempControl.htm (249 words)

	Temperature Control Troubleshooting - The Virtual Weber Bullet
		So, it's ironic that temperature control is one of the areas that frustrates new WSM owners most.
		As discussed in greater detail on the Measuring Temperature In The WSM page, the temperature measured at the lid is 12-15°F higher than the actual temperature at the top cooking grate.
		For example, a run-up in temperature late in a cooking session might be the result of 1) the cooker is now in full sun, no longer shaded by your house; and 2) the natural increase in cooker temperature that occurs as the meat takes on less heat energy.
	www.virtualweberbullet.com /tempcontrol.html (1868 words)

	Genesis Cryogenic Temperature Control System (Site not responding. Last check: 2007-10-12)
		The new power supply is a programmable DC Current Source Output that incorporates open and short circuit protection to the 50 volt supply in the event that the power transistor experiences a collector-emitter short, and short circuit protection to ground in the event that the current is diverted away from the heater coil.
		All of the features of the temperature controller may be operated from this screen by means of a pointing device such as a mouse or the standard computer keyboard.
		The temperature controller may be operated in all modes, data graphed in real time, and stored to disk if desired.
	www.scientificinstruments.com /instruments/controllers/genesis/pc2001.htm (971 words)

	Glass Melting Furnace Temperature Control
		The temperature of the melted glass is adjusted to a suitable temperature for the glass forming process to follow.
		Control temperature in a dead time process such as in a glass melting furnace.
		The error compensator is used to reduce the difference between the desired temperature and the actual temperature of the furnace.
	www.aptronix.com /fuzzynet/applnote/glass.htm (534 words)

	Temperature Control
		The Temperature Control Shop operates and maintains the temperature control equipment that allows the campus to stay warm in the winter and cool in the summer.
		Our BAS is utilized to optimize the room space temperature while managing the amount of primary energy (natural gas and electricity) used to maintain that temperature.
		The changeover is performed on the basis of priorities established to (1) provide comfort to students living in University Housing, (2) maintain required temperatures to protect equipment and research in progress, and (3) serve the greatest number of individuals and activities.
	www.carleton.ca /physicalplant/technical/temperature.htm (429 words)

	Thermoelectric Cooler Temperature Control
		To suppress temperature fluctuation because of ambient temperature variation and uncertainties of the load condition, the controller must be capable of either sourcing or removing heat to maintain control without temperature overshoot or undershoot.
		To minimize temperature variation, the PID control or other advanced control algorithms, such as adaptive PID control, must be used to enhance the system stability.
		Figure 1 shows a typical TEC application for optical module control that is commonly used to control laser wavelength (or color) by regulating the temperature of the laser diode.
	www.freescale.com /webapp/sps/site/application.jsp?nodeId=023Z1DxpCpksmP (691 words)

	Temperature Control Panels, Control Panel, Process Heating Systems, Heater Control Center - Heat Exchange and Transfer, ...
		Temperature control centers and custom temperature panels for control of resistive heating loads.
		Our heater control centers are built in accordance with the national electric code and include digital temperature controllers and SCR power controls.
		Control panels can be designed for NEMA 12, 4 4x, 7, and 9, Class I, Division 1, and Division 2 hazardous areas using NEMA 7 explosion resistant boxes, or using a Z (Div.
	www.heat-inc.com /temperature.html (144 words)

	Temperature Control (Site not responding. Last check: 2007-10-12)
		The temperature is measured using LM335 precision temperature sensors that output 10mV/degree K. D1 measures the ambient temperature.
		D2 is mounted close to the heated optics for measuring the optics temperature.
		So if the offset voltage is set to 20mV (2 deg C) at room temperature, then when the system is in use at 0 deg C, the offset will be about 1.83 deg C. This is close enough to 2.0 degrees C offset at room temperature for the purpose of this circuit.
	www.atmsite.org /contrib/Clement/newdewheater (614 words)

	Feedback and Temperature Control
		When the oven is cooler than the set-point temperature the heater is turned on at maximum power, M, and once the oven is hotter than the set-point temperature the heater is switched off completely.
		Although PD control deals neatly with the overshoot and ringing problems associated with proportional control it does not cure the problem with the steady-state error.
		In these circumstances it is often sensible use a PI controller or set the derivative action of a PID controller to zero.
	newton.ex.ac.uk /teaching/CDHW/Feedback/ControlTypes.html (581 words)

	Process Automation Technologies \| Jacket temp: Thermocouple multiplexers \| Control Gloal
		The slave controller must be at least four times faster than the master, and the inner slave, four times faster than the outer slave.
		Since these two types of inlet temperature control would have different response times, it is difficult to estimate how much difference the response of a jacket outlet TC would be.
		Then any disturbances to the inlet temperature (sticking valve, variations in supply temperature, etc.) would be handled in the lowest level loop, rather than propagating through to the jacket temperature.
	www.controlglobal.com /articles/2006/203.html (1204 words)

	Temperature Control Modules
		The MSM283-xx is a cabin temperature controller that controls the cabin environmental systems using an isolated resistive element.
		Combined with the use of temperature control panels that may be located throughout the cabin environment, this temperature control system allows the user the capability to set a specific desired ambient cabin temperature for regulation.
		The Temperature Control Switch, SPS-F90(C)-5833, may be located throughout the cabin environment to facilitate the need for user interface.
	www.audiointl.com /Links/Product_Information/Cabin_Control_Modules/Temperature_Control_Modules.htm (974 words)

	humidity control chamber, environmental chambers, temperature humidity chambers, stability rooms
		Parameter Generation and Control (PGC) specializes in humidity control chambers and environmental chambers by providing precise relative humidity and temperature control with walk-in rooms, reach-in chambers, and relative humidity generators to serve existing structures.
		Stability chambers and stability rooms for the pharmaceutical industry that exceed ICH guidelines in regards to temperature and relative humidity control.
		Temperature humidity chambers and temperature/relative humidity generating units for mini-environments within the Semiconductor industry.
	www.humiditycontrol.com (533 words)

	Greenhouse temperature control, tropical thermostat
		Whatever the temperature, accurate control is essential for the plants but also your pocket.
		Controls heaters up to 3kw-13amps, soil warming cables in sand beds, tubular heaters, boilers or cooling equipment, extract, circulation fans or electric vent openers.
		The timeclock activates the electronics, the daytime set temperature is reduced by the degree drop required at night.
	www.simplycontrol.com /catalogue/temperature/default.asp (375 words)

	Temperature Control
		The current control electronics control the current provided by a big external power supply flowing through the peltier heating elements according to the signal received from the Octagon.
		While the temperature control program is running, the Octagon logs back the critical parameters of the temperature control program to the main computer, which can be observed (and presumably recorded) in smartlink.
		The Octagon's temperature control program includes a clever little routine which takes most of the pain out of calibrating the RTDs, by going through a series of reference measurements with high accuracy resistors and then computing the constants the program requires to work out the right temperature automatically.
	bigbro.biophys.cornell.edu /documents/Temperature_Control/Duesing (2618 words)

	NORTHERN BREWER: Fermentation Temperature Control
		Like the Johnson Controls Thermostat, the Ranco Electronic Temperature Controller operates by overriding the internal thermostat in a refrigerator or freezer and gives the brewer greater control over the fermentation.
		The Ranco controller features a wide setpoint temperature range (-30° F to 220° F) and differential adjustment (1° F to 30° F).
		The temperature sensor is a 1.94 inch thermistor on an 8 foot cable.
	www.northernbrewer.com /temp-control.html (458 words)

	Ogden Products-Temperature Control Panels
		Temperature Control Panels are self-contained completely wired and ready to use.
		Included is a completely solid state temperature control such as the ETR-4120 shown or other model.
		Temperature and Process Control Panels are designed based upon specific application requirements.
	www.ogdenmfg.com /etr9.htm (141 words)

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