Transmitter LKM294 for resistance sensors
The LKM294 is a digital, configurable measuring transducer for mounting on the standard rail and can be adjusted for different resistance sensors according to DIN EN 60751. It converts the temperature dependent resistance value of the sensor into a standard signal of 0...10V or inverse 10...0V. Four DIP switches can be used to set 16 different measuring ranges, one of which can be freely selected. Lead resistances are compensated by means of a four-wire circuit. A three- or two-wire circuit can also be implemented.
The transmitter is supplied configured to customer specifications. Subsequent changes of the sensor and measuring range can be made with our communication interface "LKM S1" with adapter A1 and a PC. The required program is available free of charge in the tab "Downloads".
For a small correction an offset can be set by software.
The following measuring ranges are configurable:
| -100...100°C | -30…70°C | 0...100°C | 0...400°C |
| -50...50°C | -20...80°C | 0...200°C | 0…500°C |
| -40...60°C | -20...150°C | 0...250°C | 0…600°C |
| -30...60°C | 0...50°C | 0...300°C | 1x freely selectable |
The selection menu is available for configuration.
When entering your individual measuring range, please note the measuring range of the selected sensor. This can be found in the technical data. The minimum span is 20°C.
| Input: | Pt100/Pt1000 Ni100 TK6180/Ni1000 TK6180 Ni100 TK5000/Ni1000 TK5000 Resistor |
-200…850°C, -60…250°C -60…260°C 0…4000Ω |
| Sensor circuit: | 2-/3-/4-wire circuit | 4-wire circuit standard |
| Number of ranges: | 15+1 | 1x freely selectable |
| Measuring current: | 0.25mA | |
| Current consumption: | max. 10mA | |
| Supply voltage: | 15...35 VDC, 15...26 VAC | reverse polarity protected |
| Resolution: | 0,1°C | |
| Linearity error: | <0,1% | |
| Measurement accuracy: | 0,3% | from measuring range |
| Measurement rate: | 2/s | |
| Output: | 0...10V | 10...0V possible via software |
| Sensor break: | >10V | |
| Short circuit: | =0V | |
| Clamp type: | Screw terminals | 0,2...2,5mm2 |
| Temperature coefficient: | <0.015K/°C | adjusted temperature range 0...100°C |
| Operating temperature: | -40...85°C | |
| Dimension: | 75x25x53mm | H x W x D |
| Weight: | 60g | |
| EMC: | EN 61326-1 EN 61326-2-3 |
Emission and noise immunity |
Documents
| Document | Format | Language(s) |
|---|---|---|
| Datasheet – LKM294 Technical Specification |
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| Operating Instructions – LKM294 Installation and operating manual |
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Software
| Program / Package | Format | Language(s) |
|---|---|---|
| Service Program – LKM294 for Windows-PCs Parameterization Software |
ZIP |  |
| Program – AnalogToTemperatur Conversion of analog output values (mA or V) to temperature |
ZIP | |
Responsible Person in the EU:
LKM electronic GmbH
Elgersburger Straße 1
99331 Geratal
Germany
info@lkmelectronic.de
https://lkmelectronic.de/
