Transmitter LKM120 for Pt100/Ni100
The LKM120 is a digital, programmable transmitter for mounting in the connection head type B and can be set for Pt100 according to DIN EN 60751 and Ni100 resistance sensors. It converts the temperature dependent resistance value of the sensor into a standard signal of 4...20mA or inverse 20...4mA. Lead resistances are compensated by means of a four-wire circuit. A three- or two-wire circuit can also be implemented.
The transmitter is delivered configured according to the customer's requirements. Subsequent changes to the sensor and measuring range can be made using our "Programming Kit for LKM120/121" and a PC. The required program is available free of charge in the "Downloads" tab.
For a small correction, an offset can be set by software.
The selection menu is available for configuration.
When entering the measuring range, please note that it is between -200 and +600°C for the Pt100 and between -60 and +250°C for the Ni100. The minimum span is 20°C.
| Input: | Pt100 / Ni100 | 2/3/4-wire circuit |
| entire measuring range: | -200…600°C | Pt100 |
| -60…250°C | Ni100 | |
| Span: | programmable | |
| Zero: | programmable | |
| Response time: | 0,6 s | |
| Measuring current: | max. 0.7mA | |
| Linearity error: | <0.1% FS | |
| Loop voltage: | 5...30 VDC | reverse polarity protected |
| Lead resistance: | max. 25Ω | per line |
| Resolution: | >14 bit | |
| Load resistance: | <900Ω | with 24V |
| Sampling rate: | 300ms | with 50/60Hz filter otherwise 100ms |
| Output: | 4...20mA (20...4mA) | programmable, current loop 2L |
| Probe break: | >20mA | programmable |
| Short circuit: | <4mA | programmable |
| Clamp type: | Spring terminals | |
| Clamping range: | 0,2...2,5mm² | |
| Housing: | Nylon black | |
| Temperature coefficient: | <100ppm | |
| Operating temperature: | -40…85°C | |
| Dimension: | 43,3x20mm | D x H |
| Weight: | 32g | |
| EMC: | EN 61326-1 EN 61326-2-3 |
Emission and immunity |
► Operating instructions in PDF format
► Service program for LKM120/121
► Program for conversion of analog output values (mA or V) of transmitters to the corresponding temperature