SPECIFICATIONS Input types: -Thermocouples J, K, R, S, T, E -RTD type Pt100, Ni100 -Potentiometer min. 65 max 1000 Ohm Input impedance for TC: 1 MOhm Output 4 to 20 mA Resolution: 5 microA Erratic sensor behaviour for TC and RTD Automatic cold junction compensation Direct or reverse mA output Action Earthing: ground terminal can be detached from instrument housing. FUNCTIONAL DATA 1) Transmitter Parameters. The parameters that are available for display and setting are: Measuring range: upper and lower measuring range limits adjustable by 5 K steps (for minimum span see table。) Zero and span Adjustment: by 0.1℃ steps (or 0,18℉ or 0,1 O ) from-9.9℃ to +9.9℃ (or from -17,8℉ to +17,8℉ or from -9.9O to +9.9O ) Reverse Output : obtained via software Measuring Units : for the displaying measure ℃ or ℉ may be selected. If the chosen sensor element is potentiometer, will appear "O" GENERAL Series TT-26 transmitters measures a temperature in ranges from -200 up to +1600℃ . The measuring element may be a thermocouple, a resistance RTD element or a potentiometer. The sensor generates a signal corresponding to the actual temperature and it is complete with a PTC thermistor which also transmits the temperature at the terminals inside the case to the electronic system (cold junction). On the basis of these two values and of the configured parameters the electronic system generates a standard output signal (4 to 20 mA, two wires system) and displays all the necessary data on the LCD display. The operating parameters can be changed by means of the four pushbuttons that are below the LCD display. Among the relevant characteristics of this microprocessor based transmitter, are the following: -wide rangeability for the measuring span -high accuracy and resolution -linear 4 to 20 mA output for all TC types and RTD's -advanced microprocessor based electronics -a wide selection of sensors -ambient temperature (cold junction) compensation -models for direct or surface and 2 inch pipe mounting REF SENSOR TYPE NOMINAL RANGE MINIMUM SPAN A Pt100 Resistance -200.0 / +600.0 50 B Ni100 Resistance -50.0 / +160.0 15 C Potentiometer 0.0 / 1000.0 Ohm 65 Ohm E T/C E Thermocopuple -190.0 / +800.0 65 J T/C J Thermocopuple -180.0 / +1050.0 80 K T/C K Thermocopuple -200.0 / +1320.0 95 R T/C R Thermocopuple 0.0 / +1680.0 105 S T/C S Thermocopuple 0.0 / +1660.0 105 T T/C T Thermocopuple -240.0 / +380.0 40
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