2.5F MultiTC PID Temperature / Reflow Oven / BGA Rework Controller Kit

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Features

2.5F MultiTC is a precise PID Temperature and also Reflow Oven, Furnace Controller as well as BGA Reflow Soldering, BGA Rework Controller with programmable set-points, 8 different programmable profiles and changeable parameters. Its functions are base on a further developed AVR ATMega88PA-AU SMD microprocessor. A MultiTC KIT controller set includes a thoroughly tested and calibrated controller assembled on double side, professional SMD PCB, an assembled and tested LCD display and a K-type thermocouple. MultiTC KIT controller sets are available (Optionally: I can send a 25 amps Taiwan FOTEK SSR-25 solid state relay too).

Beneficial properties of the 2.5F MultiTC temperature controller:

• Multi function temperature controller, with K-type thermocouple sensor and NTC thermistor for cold-point temperature measurement-compensation.
• Simple thermometer.
• Simple clock and timer (for example, it can be set to switch on an electrical consumer to maintain a programmed temperature for a given time). The timer can be set between 1-18000 seconds (5 hours). There is another controller version, the so-called minute-base MultiTC version, where the timer can be set between 1 min to 18000 min (300 hours).
• 2 separate adjustable outputs (PID and PWM) to operate 2 electrical consumers.
• PID controller, to heat up and maintain a preset temperature. The temperature can be set between 0 - 500°C. A PID (proportional-integral-derivative) controller is a generic control loop feedback mechanism (controller) widely used in industrial control systems. A PID controller calculates an "error" value as the difference between a measured process variable and a desired setpoint. The temperature PID controller attempts to minimize the temperature error by continuously adjusting the performance of the electric heater that is by trying and preventing any errors from occurring, it ensures the device performs as flawlessly as possible (more details can be found on Internet).
• PID ramp controller, to heat up / cool down an heater (ex. traditional heater, reflow oven, IR Infrared rework heater, halogen bulb, etc.) matching a pre-programmed temperature profile. The temperature profile can be set by 6 time-temperature sections. MultiTC has 8 different profiles that are pre-programmed (ex. for lead-free solder used in oven, lead solder used in oven, lead-free or lead solder used for BGA soldering / rework, etc.) and can be easily changed.
• A second electric device (eg. ventilator) can be set up to be controlled by the PWM output so it can operate with a predetermined performance at the beginning of the heating process, and with another performance at the end of the process. For example, at the beginning, the ventilator can circulate the air in the oven with very low speed to make the temperature even, and at the end of the heating process it can cool the oven fast with higher speed. Instead of using electronic device we can use a buzzer to make sound so it can indicate the end of the heating process so manually cooling down (ex. opening the door) can be taken.
• A fix performance can be preset for a second electrical device so it can operate at that performance continuously (eg. a bottom heating or a ventilator is working at a power of 25%).
• The PID parameters, the profiles data and the operating modes can be set manually by using 3 buttons. The values are displayed on the 2x16 character LCD display.
• The PID parameters (Kc, Ti, Td) are the optimal values if they are manually determined and set to a specific electricity heater - the optimal parameters are those that are used to heat up the device (without overheating it) as soon as possible to the set temperature. The PID parameters in MultiTC software are given for an 800-900W power bottom- and top-heating device (ex. a pizza oven). It turned out that these parameters are also good when using the controller for BGA removing / soldering / rework by heating the BGA with a halogen bulb (see video). If a device with much different performance is used, the parameters should be changed for a better regulation. To calculate these parameters, a series of temperature measurements should be carried out once: 1 measurement every 30 seconds and the total time for all the measurements is approx. 30 minutes. Based on these data the optimal PID parameters can be calculated. Lots of information about how to calculating these values can be found on Internet. My help: if I receive the measurements data in an Excel table, I can calculate and send back the parameters for the given electrical equipment.
• Controller temperature range: 0-500°C.
• Temperature measurement accuracy: 2°C.
• Power consumption: 20 mA (with LCD backlight on), without switching of electrical consumers.
• MultiTC can switch 2 electrical devices. Power consumption for switching one device is plus 10-15 mA (so in case of two, the plus consumption is 20-30 mA).
• MultiTC is a complete temperature controller so it is not necessary to use any PC to set it up or to make it work.

(More information about how MultiTC works, which parameters are included, how to set them, etc. can be found in the documentation).