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Easy on-site monitoring and adjustment of all hygrotest transmitters

Easy o on -s site m monitoring With the help of the portable reference measuring instruments testo 400 or testo 650, checking whether the humidity and temperature readings of thehygrotest are within acceptable levels is very quick and easy. To do this, the reference probe and the hygrotest probe are subjected to the sameconditions (in a process or a laboratory). The hygrotest and the testo 400/650 communicate with each other via a ribbon cable. The reference readingsare presented clearly opposite each other in the display of testo 400 or 650. One can now see at a glance whether the readings are correct. One -p point a adjustment ( (offset) A one-point adjustment can be carried out at the touch of a button, also using the reference measuring instrument testo 400 or 650 (reference setincludes the precision humidity probe). Via the ribbon cable, the humidity and the temperature characteristic curve of the hygrotest is corrected at theworking point (the current humidity or temperature) by an offset. This adjustment method is always recommended if the process remains in theproximity of the working point, for instance in the range 20...60 %RH where the working point is at 40 %RH. WP = Working point= Error at WP = Offset %RHDeviation
Working range Two -p point a adjustment w with r re -u usable s salt s solutions Adjustment using two salt solutions is also possible on site. In the outer chamber of these “control/adjustment containers” is a saturated salt solution.After a period of adjustment, the air in the inside chamber forms equilibrium humidity. In the two standard solutions this is 11.3 % and 75.3 %RH. Theaverage error is smaller in a two-point adjustment than in a one-point adjustment, especially when working in a greater range. The testocontrol/adjustment containers are also re-usable, so that the costs are kept at a minimum. Cannot be used with hygrotest 650 HP (because of sensorheating).
Control and humidity adjustment set11.3 %RH/75.3%RH, incl. adapter for humidity probe, fast checks or adjustment of humidity transmitter Part no.0554 0660 afterbefore %RHDeviation 11.3%75.3% Calibration w with t traceable c calibration s standards Testo additionally offers calibration in accredited Testo laboratories. Where quality assurance requirements must be met, (ISO 9001, QS9000, GMP, FDA, HACCP,...), ISO calibration is the ideal solution (laboratory accredited according to ISO 17025). Where the highest reliability is required, for example in production standards, assessors, public authorities or for critical applications, DKD calibration is recommended. beforeWPafter