Transmitter LKM231
Transmitter LKM231 for thermocouples
The LKM231 is an analog transmitter with galvanic isolation between input and output for mounting on the standard rail. It can be designed for different thermocouples according to DIN EN 60584 and DIN 43710. It converts the temperature-dependent thermoelectric voltage of the sensor into a standard signal of 4...20mA. The temperature compensation takes place in the transmitter itself.The transmitter is supplied calibrated to customer specifications. By means of span and zero controllers, a subsequent fine adjustment can be carried out on site.
The selection menu is available for configuration.
Please ask for individual measuring ranges in advance by clicking the >>Ask about product<< button.
In the case of analog transmitters, it may occasionally be the case that the desired measuring range cannot be realized. If the individual measuring range is confirmed by us, it can be entered in the >>YOUR COMMENTS<< field at the end of the order process.
| Input: | Thermocouples K,J, L, T, U, E, |
N, S, B with higher error |
| Zero: | >-200...600°C | depending on thermocouple |
| Span: | >200 K | depending on thermocouple |
| Linearity error: | <1% FS | depending on thermocouple |
| Cold junction error: | <±0,5°C | |
| Loop voltage: | 10..35VDC , reverse polarity protected | When supplied from a voltage, the values of the auxiliary voltage apply |
| Auxiliary voltage: | 24VDC ±10% | reverse polarity |
| Max. Current consumption: | 40mA | |
| Output: | 4...20mA | Current loop |
| Test voltage: | 1kV | |
| Sensor break: | >20mA | |
| Probe short circuit: | Current value for room temperature | |
| Response time: | <0,1s | |
| TC: | <100ppm/°C | |
| Operating temperature range: | -25...85°C | |
| Humidity: | <95% | |
| Mounting: | 35mm rail | |
| Material: | Polycarbonate | |
| Dimensions: | 75x25x53mm | H x W x D |
| Clamping type: | Screw terminals | |
| Clamping range: | 0,2..2,5mm² | |
| Weight: | approx. 60g | |
| Vibration: | 5g/10...200Hz | |
| 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