Common features + benefits testo 6651 and testo 6681

Display and operating menu The optional display has an extremely convenientoperating menu. With the help of four operating buttons, almost all operations can be carried out which can be conducted using the P2A software. Commissioning, adjustment and analysis are thus possible completely without a PC - simply on site!The display not only presents the measurement valuesand relay status clearly, but also guides the user safely through the operating menu thanks to a clear-text line. A password protects against unauthorized operation. Acover for the buttons can also be installed.And last but not least: The clear-text can be selected insix languages - optimum for your systems at home and abroad.

19.3

°C

57.8

%RH

PROBE CONNECTION

Digital probes;: exchangeable and traceable The humidity probe in the models testo 6651 and 6681can be easily exchanged by hand. A readjustment withthe measurement transmitter itself is not necessary, since the probe series testo 6600 used in the humidity measurement transmitter testo 6651 not only has a purely digital interface to the measurement transmitter, it is also completely calibrated and adjusted.Unplug probe 1, plug in probe 2 - continue measuring! At the same time, Testo fulfils the highest demands, forexample those of the pharmaceutical industry. Each probe has its own serial number, a store for the adjustments carried out with it, and its own operational hour counter. This visualizes (via the measurement transmitter’s operating menu or the P2A software) howlong the probe has already been in use, and whichsettings have been carried out on it (see also P2A software). Calibration a and a adjustment via operating menu, adjstment buttons and p2A software, testo 6651/6681 offer• 1-point adjustment• 2-point adjustment• adjustment of analog outputs Thanks to the analog output adjustments, it is possible toeliminate measurement errors which can occur in the transmitter due to the digital-analog conversion – this too, is a world innovation in the field of humidity.