The HD31 is a portable multifunctional instrument and datalogger with a large (43 x 58 mm) colour graphic LCD display.
It has three independent inputs. Both single and combined SICRAM probes can be connected to each input to measure a variety of physical quantities:
- Temperature
- Relative humidity
- Atmospheric and differential pressure
- Air speed
- Illuminance (lux) and Irradiance
- Carbon dioxide (CO2) – Air Quality
- Direct voltage (VP473 module) and current (IP472 module)
Sampling speed one per second each channel. Storage capacity 32,000 samples per channel.
Functions: CLOCK, HOLD, RELATIVE, DIFFERENCE, MINIMUM, MAXIMUM, AVERAGE. Simultaneous display of three measurements. Calibration of the individual probes with permanent storage of the calibration data inside the probe: probes can be changed without losing the calibration.
The instrument allows the input of various types of probe of different physical quantities. Platinum probes (25, 100, 500 Ω at 0 °C), Thermocouples K, J, E, T, N, R, S, B probes, combined R.H. and temperature, pressure also barometric one, air velocity, light, CO2 , mV and mA probes can be connected.
Centesimal temperature measurements can be carried out by PRT sensors in the range –200…+350°C, and decimal in the range +350…+850 °C.
