LKM204 - Measuring Transducer for RTDs
The LKM204 is designed for RTDs in various industrial applications and has been specially developed for resistance thermometers. It converts the temperature-dependent resistance value of the sensor into a standard signal of 0...10V. Lead resistances are largely compensated for by the three-wire circuit, although a two-wire circuit is also possible. The sensor, measuring range and optional offset can be adjusted via the USB-C interface on a Windows PC. The software is available as a free download.
The QR code on the front of the transmitter links to this website, allowing you easy access to the documents and software at a later date.
Order options:
1. standard configuration:- No adjustments necessary in the selection menu.
- Delivery: The transmitter is supplied with the following configuration: Input: Pt100 (3-wire circuit), measuring range: 0...100°C, output: 0...10V
- Adaptation: Select your desired sensor and measuring range. Make sure that the selected measuring range is within the technical specifications of the sensor. The range is a minimum of 20K and a maximum of 850K.
- Delivery: The transmitter is supplied ready for installation.
Accessories for your LKM204:
Matching cable sensors: For the operation of your LKM204, we offer high-quality cable probes for RTDs that ensure precise and reliable temperature measurements. Upon request, these can be customized to meet your specific requirements.| Input | Measurement range | Accuracy |
|---|---|---|
| Pt100 | -200 – 850 °C | ±0.1 K |
| Pt1000 | -200 – 300 °C | ±0.1 K |
| Ni100 TK6180 | -60 – 250 °C | ±0.1 K |
| Ni1000 TK6180 | -60 – 170 °C | ±0.1 K |
| Ni100 TK5000 | -50 – 250 °C | ±0.1 K |
| Ni1000 TK5000 | -50 – 200 °C | ±0.1 K |
| Resistance | 0 – 2000 Ω | ±0.05 Ω |
| Feature | Value | Remark |
|---|---|---|
| Max. current consumption | 23 mA | at 24 V DC |
| Zero | corresponds to selected sensor | programmable |
| Span | 20 – 850 K | programmable |
| Sensor wiring | 2- or 3-wire connection | |
| Measuring current | 0.25 mA | |
| Resolution | 16 bit input | 14 bit output |
| Linearity error | < 0.1 % FS | |
| Output | 0 – 10 V or configurable within 0 – 10 V |
|
| Short-circuit | 0 V | |
| Sensor break | approx. 11 V * | |
| Measurement rate | 1/s | |
| Input terminal type | Screw terminals | 0.2 – 1.5 mm² |
| Output terminal type | Screw terminals | 0.2 – 2.5 mm² |
| Mounting | 35 mm DIN rail | |
| Operating temperature range | -40 – 85 °C | |
| Temperature coefficient | < 25 ppm/K | |
| Humidity | < 95 % | |
| Weight | 60 g | |
| Protection rating | IP20 | |
| Dimensions | 89.7 × 17.8 × 60.7 mm | H x W x D |
| Material | Polycarbonate | |
| Vibration | 5 g / 10 – 200 Hz | |
| EMC | EN 61326-1 EN 61326-2-3 |
Emission and immunity |
* For all individually configured output voltages: the maximum output voltage in case of measurement-range exceedance or sensor break is calculated as (Vmax – Vmin) × 0.1 + Vmax.
Documents
| Document | Format | Language(s) |
|---|---|---|
| Datasheet – LKM204 Technical Specification |
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| Operating Instructions – LKM204 Installation and operating manual |
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Software
| Program / Package | Format | Language(s) |
|---|---|---|
| Service program for Windows PCs Parameterization software |
EXE | |
| Program – AnalogToTemperatur Conversion of analog output values (mA or V) to temperature |
ZIP | |
| Driver (ftdichip.com) USB driver |
Web | |
