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DT 45800 - TC Temperature Transmitter

The TC Temperature Transmitter DT 45800 is used for measure industrial process signals. It converts Thermocouple sensor signals to isolated standard signals. Due to the easy con­fi­gu­ra­tion via USB inter­face the Trans­mitter is sui­table for flexi­ble use. The high relia­bi­lity and the pro­tec­tive se­pa­ra­tion are further fea­tu­res, which ensure a safe system ope­ra­tion.

The File menu

File menu


Using the File menu, you can load, save and document your configurations, either as a printout or as a PDF file.

The Device menu

Device menu

In the device menu, you can transfer the configuration to the connected device or load it from the device.

In addition, you can open a diagnostic window to view the current measured values and status of the device.

The Settings menu

Settings menu


In "Settings", select the programme language.

The Help menu

Help menu


In the help menu you can access the online help. You can also press [F1] at any time to call up the help for the selected element.

"About DRAGOset" provides you with information on the program.

Data record load/save

Loading and saving at the transmitter and with files

Data records can be saved in files and transmitted to the device or transmitter. Likewise, data records can load from the device or file into DRAGOset.

Measuring point number

Your measuring point number

For a printout or PDF documentation of the device settings, you can assign a measuring point number (Tag) to the device or transmitter. The number can be saved in the device, so the device every time indicates each reading with his Measuring Point Number.

The Measuring Point Number can have up to 16 characters, so the code is according to DIN EN 60617, and EN ISO 10628 (previously DIN 28004) in the device.

Sensor and compensation

Under Sensor Type, select the sensor you are connec­ting to the trans­mitter.

The cold junction compensation can turned on or off.

internal: Compensation is on, Error of Cold junction < 1.5 K
off: Compensation is off

Temperature range

Temperatur-Messbereich einstellen

Here you can set the desired measurement beginning and end of the measurement. The span, ie the area between the beginning and the end, shall not be less then minimum margin (see table). The possible settings are based on the operating temperature range of the sensors:

Sensor Measurement range min. Span
Thermocouple Type K -270 ... +1372 °C 50 K
Thermocouple Type J -210 ... +1200 °C 50 K
Thermocouple Type A 0 ... +2500 °C 100 K
Thermocouple Type B +250 ... 1820 °C 100 K
Thermocouple Type C 0 ... +2315 °C 100 K
Thermocouple Type D 0 ... +2315 °C 100 K
Thermocouple Type E -270 ... +1000 °C 50 K
Thermocouple Type L -200 ... +900 °C 50 K
Thermocouple Type N -270 ... +1300 °C 50 K
Thermocouple Type R -50 ... +1768 °C 50 K
Thermocouple Type S -50 ... +1768 °C 50 K
Thermocouple Type T -270 ... +400 °C 50 K
Thermocouple Type U -200 ... +600 °C 50 K

Output type and characteristics

Output type and characteristics

At the output, there are 4 common standard signal ranges available:
0 to 20 mA, 0 to 10 V, 4 to 20 mA, 0 to 5 V.

The selected measurement range is linearly mapped to the output range.

On the rising characteristic the begin of  measuring range corresponds to the 0/4 mA or 0 V, the end of measuring range to the 20 mA or 5/10 V. The falling characteristic reverses the course. The transfer function of the converter is shown graphically in DRAGOset.

Error signalisation

Error signalisation

The error signalisation defines whether errors will be left the output range. In this case, the output signal jumps to 22 mA, 11 V, 11 mA or 5.5 V, depending on the output selection.
Alternatively, the setting 0 mA, 2 mA, 4 mA or 0 V, 1 V, 2 V be chosen to signal the error, the output will remain in the range of measured values​​. This can be useful for example at a PLC input, that cannot handle signals out of range, the detection of the error then must be in the PLC.

  over range in range
output type output range error signal output range error signal
0 ... 20 mA 0.0 ... 20.5 mA 22.0 mA 0,0 ... 20.0 mA 0.0 mA
4 ... 20 mA 3.8 ... 20.5 mA 22.0 mA 4,0 ... 20.0 mA 4.0 mA
0 ... 10 V 0.0 ... 10.25 V 11.0 V 0,0 ... 10.0 V 0.0 V
0 ... 5 V 0.0 ... 5.125 V 5.5 V 0,0 ... 5.0 V 0.0 V

DIP Switches

Setting the DIP switches on the transmitter

DRAGOset cal­cu­lates from your inputs the correct DIP switch pro­gramming. This image can also be found in the PDF docu­men­ta­tion and the print­out again.

If DRAGOset is not connected with the cable to the transmitter, you can transfer the switch settings manually to the DIP switches of the transmitter. With the DIP switches only prefered default settings are possible.

If your configuration is not available as a DIP switch setting, you can program the settings using DRAGOset via the USB interface into the transmitter. The DIP switches S1-1 to S1-3 must be set to ON (PC mode).

Device diagnostics

Device diagnostics

With the menu item "Device | Diagnostics ..." call to a diagnostic screen. In this window, you get an overview of the current measured values ​​and messages of the transmitter.

This requires an online connection to the transmitter.

Simulation of input and output signals, commissioning function


With the menu item "Device | Simulation" call to a simu­lation screen of the device. In the simu­la­tion input and output values ​​can be simu­lated.

In addition, there is the commissio­ning function to check the following circuit parts with the complete mea­su­ring range. The commissio­ning function dyna­mi­cal changes the out­put value. The out­put slowly sweeps over the com­plete mea­sure­ment range, from the begin to the end value of the output range. The signal at 0 %, 50 % and 100 % of the range inserts a pause of a few seconds. It is possible to adjust the mea­sure­ment range in this check.

When you leave the simu­lator window, the simu­lation output remains active, if you do not switch off before. As a reminder, there­fore, the following window appears:

Exiting the simulation window

Wiring of Terminals

Wiring of Terminals

Depending on the selec­ted sensor type and com­pen­sa­tion changes the wiring of the trans­mitter. On this graph, you can see how the trans­mitter should be connec­ted in this mode. If you move your mouse over the image of the trans­mitter, the ter­mi­nal num­bers are displayed.

Transfer function

Display of the transfer function

DRAGOset shows the transfer function of the transmitter at the specified settings. You can see exactly the output value corresponding to the input signals. If you move your mouse over the curve, the input and output value is displayed depending on the position of the mouse pointer.