International guidelines DAkkS-DKD-R 5-7 and IEC 60068-3-5 and sets out the minimum requirements for climatic chamber calibration and verification. For chambers up to 2000 litres, this means measurements at nine defined positions, eight at the corners of the useful volume and one at the spatial centre, capturing temperature at each point and calculating humidity distribution from the psychrometer reading at the centre cross-referenced with corner temperature data.

Radiation correction is also required, using two sensors with differing surface emissivity values to account for radiation influence on air temperature measurement.

The result is a calibration record that documents actual chamber behaviour, not assumed behaviour, across the full working volume under defined conditions. That record is what gives your test data its defensibility. And this is what Ahlborn can offer with their ALMEMO® measuring system for calibrating climatic chambers. This same equipment and procedure is utilized by TANDM engineers during Site Acceptance Testing during the commissioning process and for subsequent traceable calibrations and verifications.

Many times, engineers need to understand and measure the conditions around, inside or between the UUT/s. For this TANDM is including a complimentary AHLBORN ALMEMO® 202-S data logger with T&RH sensor. This allows engineers to understand how the UUT is responding during complex test cycles.