LKM 203 - Transmitter for Resistance Thermometers
The LKM203 is designed for temperature measurements in various industrial applications and specifically developed for resistance thermometers. It converts the sensor's temperature-dependent resistance value into a standard signal of 4…20mA. Lead resistances are largely compensated by the three-wire circuit, although a two-wire circuit is also possible. Sensor, measurement range and optional offset can be adjusted via the USB-C interface and a Windows PC. The software is available for free download.
Ordering options:
1. Default configuration:
- No adjustments in the selection menu needed.
- Delivery: The transmitter is delivered with the following configuration: Input: Pt100 (3-wire circuit), Measurement range: 0...100°C, Output: 4...20mA
- Cover: The cover is not fully closed upon delivery to facilitate individual adjustments via the USB port.
2. Custom configuration:
- Adjustment: Choose your desired sensor and measurement range. Make sure that the selected measurement range is within the technical specifications of the sensor. The minimum span is 20K, the maximum span is 850K.
- Delivery: The transmitter is delivered ready for installation.
- Cover: The cover is closed and the USB port is no longer accessible without tools.
The QR code on the front of the transmitter links to this homepage, providing easy access to documents and software at any later time.
Accessories for Your LKM203:
Matching cable sensors: For the operation of your LKM203, we offer high-quality cable probes for resistance thermometers that ensure precise and reliable temperature measurements. Upon request, these can be customized to meet your specific requirements.
|
Input
|
Maximum measuring range
|
Accuracy
|
|---|---|---|
|
Pt100
|
-200...850°C
|
±0,1K
|
|
Pt1000
|
-200...300°C
|
±0,1K
|
|
Ni100 TK6180
|
-60...250°C
|
±0,1K
|
|
Ni1000 TK6180
|
-60...170°C
|
±0,1K
|
|
Ni100 TK5000
|
-50...250°C
|
±0,1K
|
|
Ni1000 TK5000
|
-50...200°C
|
±0,1K
|
|
Resistor
|
0...2000Ω
|
±0,05Ω
|
|
Loop voltage:
|
10...35VDC
|
reverse polarity protected |
|
Max. current consumption:
|
23mA
|
at 24V DC
|
|
Zero point:
|
-200…600°C
|
programmable, sensor-dependent |
|
Span:
|
20...850K
|
programmable |
|
Sensor wiring:
|
2- or 3-wire
|
|
|
Measuring current:
|
0,25mA
|
|
|
Resolution:
|
16 bit input
|
14 bit output
|
|
Linearity error:
|
<0,1% FS
|
|
|
Output:
|
4...20mA
|
Current loop
|
|
Short circuit:
|
<4mA
|
|
|
Sensor break:
|
>20mA
|
|
|
Measuring rate:
|
1/s
|
|
|
Terminal type input:
|
Screw terminals |
0,2…1,5mm2
|
|
Terminal type output:
|
Screw terminals |
0,2…2,5mm2
|
|
Mounting:
|
35mm standard rail |
|
|
Operating temperature range:
|
-40…85°C
|
|
|
Temperature coefficient:
|
<25ppm/K
|
|
|
Humidity:
|
<95%
|
|
|
Weight:
|
60g
|
|
|
Protection class:
|
IP20
|
|
|
Dimensions:
|
89,7 x 17,8 x 60,7mm
|
L x W x H
|
|
Material:
|
Polycarbonate |
|
|
Vibration:
|
5g/10…200Hz
|
|
|
EMV:
|
EN 61326-1
EN 61326-2-3 |
Emission and immunity
|
