Transmitter LKM261 for thermocouples
The LKM261 is a digital, programmable transmitter for mounting on the standard rail and can be adjusted for different thermocouples DIN EN 60584 and DIN 43710. It converts the temperature-dependent thermoelectric voltage of the sensor into a standard signal of 4...20mA or inverse 20...4mA. The temperature compensation takes place in the transmitter itself.
The transmitter is delivered in a customer-specific configuration. 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".
With a zero controller a small correction can be done on site. Additionally an offset can be set by software.
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 200°C.
| Type | Measurement range in °C |
|---|---|
| B | 300 – 1820 |
| C | 0 – 2315 |
| E | -150 – 950 |
| J | -200 – 1200 |
| K | -200 – 1370 |
| L | -200 – 900 |
| N | -200 – 1300 |
| R | -50 – 1760 |
| S | -50 – 1760 |
| T | -250 – 400 |
| U | -200 – 600 |
| Feature | Value | Remark |
|---|---|---|
| Input | Thermocouples: K, J, L, T, U, E, N, S, B, R, C | Measurement ranges see table above |
| Zero | > -200 – 600 °C | depending on thermocouple |
| Span | > 50 K | |
| Linearity error | < 0.3 K | |
| Reference-junction error | <±0.5 °C | |
| Measurement rate | 2/s | |
| Loop supply voltage | 10 – 35 VDC | reverse-polarity protected |
| Output | 4 – 20 mA / 20 – 4 mA | current loop, programmable |
| Sensor break | > 20 mA | typ. 22 mA |
| Sensor short-circuit | current value corresponding to room temperature | |
| Response time | < 0.5 s | |
| Temperature coefficient | < 100 ppm/°C | |
| Operating temperature range | -40 – 85 °C | |
| Humidity | < 95 % | |
| Mounting | 35 mm DIN rail | |
| Material | Polycarbonate | |
| Dimensions | 75 × 25 × 53 mm | H x W x D |
| Terminal type | Screw terminals | |
| Terminal cross-section | 0.2 – 2.5 mm² | |
| Weight | approx. 60 g | |
| Vibration | 5 g / 10 – 200 Hz | |
| EMC | EN 61326-1 EN 61326-2-3 |
Emission and immunity |
Documents
| Document | Format | Language(s) |
|---|---|---|
| Datasheet – LKM261 Technical Specification |
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| Operating Instructions – LKM261 Installation and operating manual |
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Software
| Program / Package | Format | Language(s) |
|---|---|---|
| Service Program – LKM261 for Windows-PCs Parameterization Software |
ZIP |  |
| Program – AnalogToTemperatur Conversion of analog output values (mA or V) to temperature |
ZIP | |
