TESTO 6681 Instruction Manual page 35

 Adjusting testo 6681 using adjustment keys
The 2-point adjustment for the adjustment points 20 %RH and
80 %RH is carried out via the user menu.
11.3 %
75.3 %
RH
RH
(salt pots)

The service flap of the testo 6681 is open.
1
Expose the humidity probe of the testo 6681 to the reference condition
of 11.3 % RH for at least 1.5 hours at 25 °C.
testo 6681
or
- 1.3 Commissioning 35
75.3 %
11.3 %
RH
RH
(humidity generator)