Temperature Indicator Controller (Series 900)
(Microcontroller based Low in Cost - Small in Depth)

Model	Product Description	Size (mm.)
DTI-902	Temperature Indicator	96 x 96 x 75 mm
DTC-903	One or Two set point On-Off Controller	96 x 96 x 75 mm

Libratherm offers high quality and low cost Microcontroller based Temperature Indicators and on-off controller’s series 900. It accepts input from J, K type thermocouple or RTD (Pt-100). User can select one of the 3 different types of input using front panel keyboard. This is the added advantage over the fixed type of input. Being microcontroller based 1 oC or 0.1 oC indicating accuracy is achieved by software linearization. Two independent set points are programmable over the full range of the selected input. Each set point can also be configured for High Alarm (Internal relay energizes when actual temperature value exceeds the set point), Low Alarm (Internal relay energizes when actual temperature value is below the set point) and OFF state. Outputs are optically isolated in the form of DC pulse, AC SSR (Triac) or electromechanical relays. SMPS power supply is utilized to operate this indicator controller in the wide range of AC supply of 90 to 250VAC.

Features :
• Latest and high speed Microcontroller based design
• Highly accurate and sturdy in operation.
• Elegant looks, Very easy to operate.
• Light weight and low depth of just 75 mm.

Application :
• Heater bank selection
• Star delta changeover
• Furnace and Oven control

Technical Specifications :

Input	Thermocouple type J, K, or RTD(Pt-100) 2 or 3-wire input (User selectable)
Range	For K type : 0 to 1372 oC For J type : 0 to 760 oC For Pt-100 : 0 to 400 oC or 0.0 to 100.0 oC or -50.0 to +50.0 oC
Resolution	0.1/1 oC Subject to the specified input and range
Accuracy	Better than ± 0.2% of the specified range
Display	4 digit 0.5” Red 7-segment LED display for process value 4 digit 0.5” Red 7-segment LED display for set value (*)
CJC	0.Built-in automatic from 0 - 50 oC
Open sensor indication	Fault message is displayed and outputs are turned off for fail safe operation.
Control Action(*)	ON / OFF with programmable Hysterisis.
No. Of Set points (*)	Shown on the display and outputs are turned off for fail safe operation.
Control outputs (*)	ON / OFF with programmable Hysterisis.
Output indication(*)	2 DC pulses 0 to 10VDC and 2 Relay contacts (5A @ 230VAC) or 2 DC pulses 0 to 10VDC and 2 ACSSR. (Outputs are optically isolated).
Key board settings	Front panel membrane key pad for parameter settings.
Supply	Universal supply of 90 to 250 VAC (5VA max.), 50/60Hz or 24VDC @ 500mA (optional – please contact us).
Size   / Enclosure  / Weight	96 x 96 x 75 mm / ABS / 250 gms / (DTI-902 and DTC-903)
(*)	Applicable only for model DTC-903.