Transmitter LKM145 for RTDs
The LKM145 is a digital, programmable transmitter for mounting in the connection head type J (MA) and can be set for various resistance sensors according to DIN EN 60751. It converts the temperature dependent resistance value of the sensor into a standard signal of 4...20mA or inverse 20...4mA. Due to the complete encapsulation with polyurethane, the components are particularly protected.
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.
For configuration the selection menu is available.
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 20K.
| RTD element | Specification range in °C |
|---|---|
| Pt100 | -200 – 850 |
| Pt1000 | -200 – 450 |
| Ni100 TK6180 | -60 – 250 |
| Ni1000 TK6180 | -60 – 170 |
| Ni100 TK5000 | -50 – 250 |
| Ni1000 TK5000 | -50 – 200 |
| Resistor | 0 – 2000 Ω |
| Feature | Value | Remark |
|---|---|---|
| Measuring current | 0.25 mA | |
| Loop voltage | 10 – 35 VDC | reverse polarity protected |
| Zero point | -200 – 600 °C | programmable |
| Span | 20 – 850 K | programmable |
| Resolution | 16 Bit | DAC 14-bit |
| Linearity error | < 0.1 % FS | |
| Output | 4 – 20 mA | current loop |
| Probe break | > 20 mA | |
| Short circuit | < 4 mA | |
| Measurement rate | 1 / s | |
| Temperature coefficient (TC) | < 0.015 K / °C | measuring range 0 – 100 °C |
| Operating temperature range | -40 – 85 °C | |
| Humidity | < 95 % | |
| Mounting | J-head | |
| Dimensions | 25 × 14.5 mm | D × H |
| Potting compound | Polyurethane, black | |
| Connection type | Screw terminals | |
| Clamping range | 0.13 – 0.75 mm2 | |
| Weight | approx. 10 g | |
| Vibration | 5 g / 10 – 200 Hz | |
| EMC | EN 61326-1 EN 61326-2-3 |
Emission and immunity |
Documents
| Document | Format | Language(s) |
|---|---|---|
| Datasheet – LKM145 Technical specification |
  |
|
| Operating Instructions – LKM145 Installation and operating manual |
|
Software
| Program / Package | Format | Language(s) |
|---|---|---|
| Software – LKM145 Parameterization |
EXE | |
| Program – AnalogToTemperatur Conversion of analog output values (mA or V) to temperature |
ZIP | |
