communicating thermo electric temperature controller

Features

a closer look at the OEM product

Linear, dissipating H-Bridge design single power supply 5.5V to 15V DC, 20mA while standby and communicating current capability few Amps, the semiconductors allow > 10A, limited by heat dissipation communicates to a PC either through RS232 or RS422 Temperature is preset by software, a potentiometer is optional Temperature stability down to 0.005 Deg C when using RS422, somewhat less with RS232 absolute accuracy is not yet specified, but wil be in the order of 2 degrees. Easy to use Windows user interface to control and monitor is included Runs standalone, without PC connection, on a fixed temperature communication commandset is available for download Fast PID controller with 16 bit of precision Protected against active and passive side over temperature, overcurrent, sensor failure and reverse supply Latching fault behaviour, requires power on/off or communication to unlatch two 1% NTC temperature sensors are included, but PT1000 are possible. Settable userdefined string lets the user distinguish multiple TECs on a bus pcb size 90 x 62 x 20 mm (width x depth x height) standard heat sink included, 110 x 80 x 50 mm Manufactured according to the european RoHS regulations Fullfills the relavant CE norms EN 60950-1, EN 61010-1, EN 61000-6-2, EN 61000-6-4

to be built inside your designs, here shown with included heatsink, mechanical drawings are available A look at the lab grade RS232 to RS422 converter :

FAQ

What kind of power supply is recommended ?

Why is there less accuracy with RS232 ?

Why is there a difference in stability and absolute accuracy ?

should I use the NTC or rather a PT1000 ?

NTC : ADC counts per degree vs temperature	PT1000 : ADC counts per degree vs temperature

The different pages of the pageview	What it does
	The dual view is available with the menu top left. Default is the single channel view. This first page shows the communication state of the PC and the TEC plus some fixed standard data. It also supports to control multiple TEC on a RS422 bus. Each TEC has an own user defineable string which can be read and written here. It even allows for some command debugging for those writing their own software. In the example here, we have current model (2006) to the left and an older model (2004) to the right.
	The second page contains static setup data, vital for the correct function. Both sides of the Peltier are to be kept within settable limits. Since the TEC itself operates with integer arithmetic, it supplies the necessary floating point multipliers for the GUI to let the user operate with floating point numbers.
	The third page contains dynamic data and show how the loop operates. It allows to optimize the loop parameters. Several values of interest can be set to be visualized in a scaleable graph. Note that at equal scalings of 0.01 degree per grid unit, the 2006 model has a stability of far below one unit, while the 2004 model has very infrequent steps of 0.01 degrees, which appears to be the measurement resolution. One could now compare the RMS deviation of the two. It should be added that the right setup runs in an extremely well isolated box, while the left runs unshielded.

Shipment

• Precision 10k reference resistor 0.01%, 2ppm/K, to be used with PT1000 measurements, on request
• 9 pin D-SUB RS232 to 10pin flatcable RS422 converter, labgrade, 25CHFr

• heatsink, 10CHFr