Transmitter LKM273
Transmitter LKM273 for Pt100/Pt1000
The LKM273 is a digital, configurable transmitter for mounting on the standard rail 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 13 different measuring ranges. Lead resistances are largely compensated by means of a three-wire circuit. A two-wire circuit can also be implemented.
A zero point controller can be used to make a small correction on site.
The following measuring ranges can be configured:
| -100...100°C | -20...150°C | 0...250°C | 0...600°C** |
| -50...50°C | 0...50°C* | 0...300°C | |
| -40...60°C | 0...100°C | 0...400°C** | *Default |
| -30...70°C | 0...200°C | 0...500°C** | **Pt100 only |
| Input: | Pt100/Pt1000 | self detecting, 2-/3- wire circuit |
| total measuring range: | -100...600°C | Pt1000 up to 300°C (adjustable via DIP switch) |
| Number of ranges: | 13 | |
| Measuring current: | 0,25mA | |
| Current consumption: | max. 21mA | |
| Loop voltage: | 10...35V | reverse polarity protected |
| Resolution: | 0,1°C | |
| Linearity error: | 0,1% | |
| Measurement accuracy: | 0,3% | from measuring range |
| Measurement rate: | 2/s | |
| Output: | 4...20mA | |
| Sensor break: | >20mA | |
| Short circuit: | <4mA | |
| Clamp type: | Screw terminals | 0,2...2,5mm2 |
| Temperature coefficient: | <0.015K/°C | adjusted temperature range 0...100°C |
| Operating temperature: | -25...70°C | |
| Dimension: | 75x25x52mm | H x W x D |
| Weight: | 60g | |
| EMC: | EN 61326-1 EN 61326-2-3 |
Emission and noise immunity |
► Data Sheet in PDF-format 
► Operating instructions in PDF-format
► Program for converting analog output values (mA or V) of transmitters to the corresponding temperature
► Operating instructions in PDF-format
► Program for converting analog output values (mA or V) of transmitters to the corresponding temperature