Transmitter LKM469
Transmitter LKM469 for Pt100/Pt1000
The LKM469 is a digital, configurable transmitter for mounting in an IP64 housing and is designed for Pt100 and Pt1000 measuring resistors according to DIN EN 60751. The sensor is automatically recognized. It converts the temperature-dependent resistance value of the sensor into a standard signal of 4...20mA. Four DIP switches can be used to set 12 different measuring ranges. Lead resistances are largely compensated by means of a three-wire circuit. A two-wire circuit can also be implemented. The components are specially protected by dip coating.
With a zero point controller, a small correction can be made on site.
The following measuring ranges can be configured:
| -100...100°C | -30…70°C | 0...50°C | |
| -50...50°C | -20…80°C | 0...100°C | |
| -40...60°C | -20…150°C* | 0...150°C | |
| -30...60°C | 0...40°C | 0...200°C | *Preset |
| Feature | Value | Remark |
|---|---|---|
| Input | Pt100 / Pt1000 | self-recognizing, 2- /3- conductor circuit |
| Total measuring range | -100 – 200 °C | adjustable via DIP switches |
| Number of ranges | 12 | |
| Measuring current | 0.25 mA | |
| Current consumption | max. 21 mA | |
| Supply voltage | 10 – 35 VDC | reverse voltage protected |
| Resolution | 0.1 °C | |
| Measurement accuracy | 0.2 K | |
| Measurement rate | 2 / s | |
| Output | 4 – 20 mA | |
| Sensor break | > 20 mA | |
| Short circuit | < 4 mA | |
| Clamp type | Screw terminals | 0.13 – 1.5 mm² |
| Temperature coefficient | < 0.015 K/°C | adjusted temperature range 0 – 100 °C |
| Operating temperature range | -40 – 85 °C | |
| Dimension | 47 x 41 mm | |
| Weight | approx. 20 g | |
| EMC | EN 61326-1, EN61326-2-3 | Emission and noise immunity |
Documents
| Document | Format | Language(s) |
|---|---|---|
| Datasheet – LKM469 Technical Specification |
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| Operating Instructions – LKM469 Installation and operating manual |
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Software
| Program / Package | Format | Language(s) |
|---|---|---|
| Program – AnalogToTemperatur Conversion of analog output values (mA or V) to temperature |
ZIP | |
