Thermometers with digital display of the serie TDX

These thermometers are manufactured in five variants:
Version TDi is equipped with the programmable converter in a current loop 4–20 mA. Optionally the version with the modulator FSK is available. The version can communicate on the current loop by means of some commands of the protocol HART®. T he buttons enable setting some parameters of the current loop and presentation on the display (for example a temperature unit).

Version TDu with voltage output 0–10 V or 0–5 V (3-wire connection). With buttons you can configure parameters of the output voltage or the unit on display. Optionally can be added two switching semiconductor switches. Version TDs is the version only with contact-free switches 30 V/500 mA. By means of the buttons parameters of the switching and units on the display can be set.

Version TDb is the version with battery supply. It has not any analog or switch output. The thermometer is generally in a sleep mode and the presentation on the display appears approximately for 10 seconds. Also in the design some parameters of the presentation on the display (for example a temperature unit or minimum/maximum displaying of a value) can be selected.

Version TDd is the version with the digital output RS232 or RS485 (three wire connection). The version enables use of 1 switch. Communications protocol is ASCII or MODUS RTU.

Specifications:

Power supply: (Vs): 9 to 30 V DC for 2 wire connection (TDi), 15 to 30 V DC for 3 wire connection (TDu, T Ds, T Dd)
Standard Measuring range: -50 to + 150 °C, -50 to +400 °C
Load resistance: < (Vs–9 V)/0,02 for 2 wire connection > 10 k for 3 wire connection
Display range: 4 ½ digits, bargraph, influence of change of power supply (IEC 770): < 0,005 %/1V
Sensing element error: see standard Pt100 A or Pt100 B
Errors of the converter (according to IEC 770): basic 0,15 %, repeatability 0,05 %, hysteresis 0,03 %, linearity 0,25 %
Temperature dependences (IEC 770): zero error 0,15 % /10 °K (for the range 0 to 70 °C)
            error of the interval 0,15 % /10 °K (for the range 0 to 70 °C)
Range of analog outputs: adjustable by means of the buttons and the display
            – minimum interval 20 % of the standard range.
Time repsonse: standard (streaming water, 0,4 ms–1,50 =) < 7 s
            fast (streaming water, 0,4 ms–1,50 =) < 4 s
            fast (streaming water, 0,4 ms–1,90 =) < 10 s
Damping factor: programmable 0 to 100 s
Connection head ambient temperature: -20 to +70 °C
Relative humidity: < 95% (without condensation)
Ingress protection: IP 65
Material of the stem: stainless steel EN X5CrNi18-10 (DIN 1.4301)
Material of the connection head: PA 6.6, polycarbonate
EMC (elektromagnetic compatibility): EN 50 081-2 (emissions), EN 50 082-2 (resistivity)