2-Point Adjustment (Humidity/Temperature) - TESTO 6381 Instruction Manual

4 Transmitter
4. Disconnect the adjustment adapter (2) from the service
interface (5).
5. Close the service flap.
4.3.4.9.

2-point adjustment (humidity/temperature)

With the 2-point adjustment, the parameter is adjusted to the
reference value at the two standard adjustment points 11.3 % RH
and 75.3 % RH or 20 % RH and 80 % RH. The reference
conditions are created either by using testo adjustment salt pots
(order no. 0554 0660, only for adjustment points 20 %RH and 80
%RH) or in the humidity generator.
In the 2-point adjustment, the deviations between the reading and
the nominal value are minimized across the entire measuring
range. The 2-point adjustment is therefore recommended for large
working ranges.
The 2-point adjustment can be performed
• via P2A software (see volume 2, 7.3.4.2. 2-point adjustment) or
• using the adjustment keys under the service flap, see
description of how to proceed below.
The 2-point adjustment for the adjustment points 20 %RH and 80
%RH is carried out via the user menu.
54
A previous 1-point adjustment is undone during a 2-point
adjustment.
Adjustment with the standard testo adjustment salt pots is
not suitable for the testo 6614 (heated for high-humidity
applications) and testo 6615 (trace humidity) probes.
The reference conditions should be generated in a humidity
generator to adjust these probes. In addition, these probes
can also be adjusted at a third adjustment point by Testo
Service.
• testo 6614: third adjustment point at 90 % RH
• testo 6615: third adjustment point at -40 °Ctd/-40 °Ftd