The channel sampling rate is adjustable from one measured value per minute to 100 Hz. The measuring range is digitised using a 16-Bit-Analog/Digital-converter. Since the Pt-sensor characteristic curve is exactly proportional only to a partial area, the entire measuring range is linearised via an internal polynomial calculation. An 8th order Butterworth-Filter with 150 Hz is integrated as hardware filter. The accuracy at 25°C is ±0.10 °C. The measuring module has one separate constant current output per input channel (Pt-sensor) and an electrically isolated CAN-output 2.0B according to ISO 11898-2 with up to 1 Mbit/s transmission speed. All measuring configuration settings can be made easily using the measurement data acquisition software IPEmotion.
M-RTD2 is designed for the demanding application of mobile measurement technology applications and can be used directly in the engine compartment. The IP65-compliant module is built in the new housing design of the M2-Series with reduced dimensions of 102 mm x 43 mm x 55 mm (B x H x T). It operates in the temperature range of –40 °C to +125 °C at a relative humidity of 5 % to 95 %.
The power supply is done via the 12-VDC- or 24-VDC-vehicle power supply and is completely galvanically isolated for the electronic measuring system. The switch-off voltage for the M-RTD2 device is 6 V. The power consumption is generally 2.5 Watt but no more than 3.0 W, if four Pt100-sensors are connected. The M-RTD2 has a special fixing technique (attachment mechanism) for interconnecting the modules without tools.
“With the M-RTD2 we offer a special measuring module for Pt100-sensors for the applications, which require a higher accuracy of the temperature measurement and/or a specific type of sensors”, clarified Harry Störzer, Head of Application & Support at IPETRONIK. “Due to the compact dimensions and the wide operating temperature range the M-RTD2 is suitable for the mobile temperature measurement; especially for HVAC-applications such as heating systems, temperature control units, engine cooling, thermal management of electronic and hybrid vehicles.”