Single Set Point Temperature Controller

 Temperature-Controller  No Responses »
Dec 182008
 
Single Set Point Temperature Controller

This is a generic or standard controller for any type of process. Shown here is a temperature controller. The STC1000 could be used for Ovens or furnaces, liquid baths, heating or environment chambers. It has a single analog input and an analog or relay output. Analog inputs could be like 4-20 mA, thermocouple or RTD. Analog outputs can be 0-10 V for a thyristor drive, SSR drive output or potential free contacts of a relay to operate external 3 phase contacters. The closed loop control could be On-Off or Time-Proportional. It was known as digital temperature indicating controller. Sometimes it Read More …

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Capacitor Temperature Monitor

 Temperature-Controller  No Responses »
Dec 132008
 
Capacitor Temperature Monitor

When placing sensors in high pressure or vacuum chamber, they should be terminated by an epoxy sealed terminal block interface on the system. 4 wire RTD is best for such applications, as multiple terminations and junctions are involved; also the wires may have to run some distance. When measuring temperature in a big surface or object, use multiple sensors. An indicating scanner-controller can be used or ensure cooling-heating is uniform using fluids or air circulation. Zoom Image RTD Sensors to Terminal Block Connections W – is White Wire from RTD, R – is Red Wire from RTD, Color of Wire Read More …

 Posted by at 2:50 PM

Two Setpoint Temperature Controller

 Temperature-Controller  No Responses »
Oct 042008
 
Two Setpoint Temperature Controller

A Two Point Process Controller or Temperature Controller would look like this. When a High-Low Alarm Protection for uC based Controller was needed the same was modified and used. Sometimes uC based instruments just forget and that can be costly, the watchdog timer has solved this problem. In Industrial Process Control we cannot take any chances, so a two tier or even three tier protection is required, especially so if the Job or Raw material being processed is expensive. So Real Time Analog Trip + uC Controller is safe. Then you can still have Electro Mechanical Devices for Extra protection Read More …

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Temperature Controller for Cooling Chamber

 Temperature-Controller  No Responses »
Oct 022008
 
Temperature Controller for Cooling Chamber

This is part of an user manual i used to give for cooling controllers – app007.pdf The Logic of cooling in temperature control is inverted, Activating the relay powers a compressor which cools the system. A small modification at the output stage, makes any heating controller into a cooling controller. It can also be done with external relay logic, but make sure on power failure (control power line) the compressor ( 3 ph power) shuts down. In all heating and cooling control, when a broken or disconnected sensor is detected, the controller should turn off all outputs and indicate a Read More …

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Temperature Control in Plastic Injection Molding

 Temperature-Controller  No Responses »
Oct 012008
 
Temperature Control in Plastic Injection Molding

This is an Application note i used to give with my controllers – app009.pdf – Ananth Temperature Control in Plastic Injection Molding. From Elex Quna – Electrical Circuits FAQ Terms in Process Control and Explanation. There are three Controls to be Adjusted to make a Proportional temperature Controller Perform Properly. This method has to be practiced and experience gained from it can be used to get very good and stable Control of the temperature or other process parameters. 1. Set Point. (SP) – This is the Temperature at which you require the Heated area to be. Here we have to Read More …

 Posted by at 8:34 AM

Temperature Measurement and Control

 Temperature-Controller  No Responses »
Jul 012008
 

These are documents and circuits which will help learn Basic Temperature closed loop control, There are many ways to control temperature. ON-OFF Hysteresis or Dead Band Control. Proportional Control with Reset. Full PID Control, Manual and Auto Tune. The first one is an electronic emulation of Thermostat or Electro-Mechanical Controls. The second is a Time-Proportional like a slow PWM. The third is the complete adaptive control. While the first is like a limit switch, the second works like a SMPS, the third PID takes into account the speed of the process and dynamic changes or disturbances of the system and Read More …

 Posted by at 12:20 PM

Temperature Controller 48-96

 Temperature-Controller  No Responses »
Jun 012008
 
Temperature Controller 48-96

A 1/8 DIN Indicating Temperature Controller. This is a Analog Controller built around ICL7107. Read more here Temperature Measurement and Control. This is a 48-96 DIN Temperature Controller, it is mains operated, it is in a Industrial Plastic Housing. It is not meant for very harsh environments. Suitable for Control Panels in Control Rooms. It has a accuracy and linearity of 0.5%. It had options of on-off or time proportional control Related Resources 1/8 DIN Digital Proportional On/Off Temperature Controller Temperature Calibrator Milli Volt Source Temperatur control simulation Automatic Temperature Controller West Instruments – Danaher Sensors and Controls This post Read More …

 Posted by at 6:36 AM
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