TESTO 6681 Profibus Instruction Manual page 57

The 1-point adjustment can be performed
via the user menu (see chapter 1.4.6.9, page 81) or
via the P2A software (see volume 2, chapter 3, page 135) or
directly by means of a Testo handheld instrument (testo 400/650) (see
description of how to proceed below).
Please note that the 1-point adjustment is generally
performed on the basis of the % RH and °C/°F parameters.
 Adjusting testo 6681 using Testo handheld instrument

The service flap is open, a testo 400/650 handheld instrument with a
precision humidity probe is ready.
5
1 Connect Testo handheld instrument 400/650 (1) with connected humidity
reference probe (3) (order no. reference set 0699 3656/20) to the service
interface (5) of the testo 6681 via the adjustment adapter (2) (connected
to the probe socket 1 of the handheld instrument).
testo 6681 Profibus
1
2
3
4
- 1.3 Commissioning 57