DRAGOset for Temperature-Transmitter DT 45000
The Universal Transmitter DT 45000 converts sensor signals from Pt, Ni, KTY or TC sensors to temperature linear standard signal 0/4 to 20 mA, 0/2 to 10 V, 0/2 to 10 mA or 0/1 to 5 V. With the mV and potentiometer input ranges further signals can be transformed into standard signals. Potentiometer end values can be easily programmed with a teach-in function as measured value limits. 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.
Under Sensor Type, select the sensor you are connecting to the transmitter.
The connector adjusts the connection that you make.
When resistance thermometers, such as Pt, Ni and KTY sensors:
|4-wire:||Connection with 4 wires, it means there are separate lines for the sensor current and for measuring.|
|3-wire:||It is important for a 3-wire connection, that all wires have the same cable cross section. The voltage drop is detected only on one side of the sensor and it is assumed that the wire on the other side produces the same voltage drop.|
|2-wire:||In the 2-wire measurement, the lead resistances is added to the measured sensor resistance. It has to be as short as possible leads. You can compensate the line resistance manually when you specify the device, the sum of the lead resistances.|
For thermocouples, the selection options for compensation change in internal, external, and manual:
|internal:||The terminal temperature is detected by the transmitter.|
|external:||You have an external Pt100 sensor at a terminal block, which measures the junction temperature.|
|off:||The measured input value is not corrected.|
|manual:||Enter the reference temperature as a fixed value.|
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:
|Pt 100, Pt 200, Pt 500, Pt 1000||-200 ... +850 °C||10 K|
|Ni 100||-60 ... +250 °C||10 K|
|Ni 200, Ni 500, Ni 1000||-50 ... 180 °C||10 K|
|Thermocouple Type B||+250 ... +1820 °C||100 K|
|Thermocouple Type C (W5Re_W26Re)||0 ... +2315 °C||100 K|
|Thermocouple Type D (W3Re_W25Re)||0 ... +2315 °C||100 K|
|Thermocouple Type E||-270 ... +1000 °C||50 K|
|Thermocouple Type J||-210 ... +1200 °C||50 K|
|Thermocouple Type K||-270 ... +1372 °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|
|Potentiometer up to 50 kOhms||0 ... 100 %||10 %|
|mV-Input ±100 mV||-100 ... +100 mV||5 mV|
|mV-Input ±1000 mV||-1000 ... +1000 mV||50 mV|
|Resistance||0 ... 5 kOhm||100 Ohm|
|KTY types||-50 ... +150 °C||25 K|
*from firmware 2
At the output, there are 8 common standard signal ranges available:
0 to 20 mA, 0 to 10 V, 0 to 10 mA, 0 to 5 V,
4 to 20 mA, 2 to 10 V, 2 to 10 mA, 1 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 0/2/4 mA or 0/1/2 V, the end of measuring range to the 10/20 mA or 5/10 V. The falling characteristic reverses the course. The transfer function of the converter is shown graphically in DRAGOset.
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 to 20 mA||0.0 to 20.5 mA||22.0 mA||0.0 to 20.0 mA||0.0 mA|
|4 to 20 mA||3.8 to 20.5 mA||22.0 mA||4.0 to 20.0 mA||4.0 mA|
|0 to 10 V||0.0 to 10.25 V||11.0 V||0.0 to 10.0 V||0.0 V|
|0 to 5 V||0.0 to 5.125 V||5.5 V||0.0 to 5.0 V||0.0 V|
|0 to 10 mA||0.0 to 10.25 mA||11.0 mA||0.0 to 10.0 mA||0.0 mA|
|2 to 10 mA||1.9 to 10.25 mA||11.0 mA||2.0 to 10.0 mA||2.0 mA|
|2 to 10 V||1.9 to 10.25 V||11.0 V||2.0 to 10.0 V||2.0 V|
|1 to 5 V||0.95 to 5.125 V||5.5 V||1.0 to 5.0 V||1.0 V|
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).
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.
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:
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.
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.
If you select the sensor type "Editable Characteristic", an additional button appears behind the selection. Click this button to get into the definition of the characteristic.
As an example, a Pt100 sensor is registered. In the sensor text field you can name the sensor characteristic, this text appears in the documentation. The input signal is to be selected between resistance measurement and mV voltage measurement. Now define up to 21 value pairs (input value at temperature) in the table. Leave unused lines blank. On the left side you will see your linearization curve in a graphical representation.
Important! The input values must be consistently increasing in the table. The temperature values can be consistently increasing or consistently decreasing.
With the teach-in function, you can easily scale the output range of the sensor or potentiometer unit to the measuring range. At the right side of the sensor type selection "mV", "resistance" or "potentiometer" you find a button to call.
There are 2 modes of teach-in, at the start, the drag indicator mode is set:
Drag indicator: in the drag indicator mode the transmitter determines the minimum and maximum measured value. You move your potentiometer over the complete range (e.g. empty boiler to full boiler), the min/max readings are shown in the teach-in window. When the range is increasing, the affected limit value is highlighted in green.
Manual setting of boundaries: a click on the button MAN switch to the manual mode. The button label change to SET. Each click on the button saves the current measured value as one of two boundary limits. Click to SET once at start and a second time at the end of range. Repeat the SET as often, there are always the last two SETs as min/max.
With the Save button the min/max range is taken as the start/end values of the measurement range of DRAGOset. Than you need to transfer the values to the device.
With Cancel the determined values are discarded.