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

4 Transmitter
4.3.4.8.

1-point adjustment (offset - humidity/temperature)

In the 1-point adjustment, the reading at the working point is raised
to the reference value so that there is no longer any deviation in the
working point. The reference condition can be measured using a
precise handheld instrument (e.g. testo 400/650 with precision
humidity probe) or be created in an air conditioning cabinet.
The advantage of the 1-point adjustment is the good measuring
result in the working range. But the further away the measurement
is from the working point, the greater the deviation can become.
The 1-point adjustment should therefore only be used for a
relatively narrow measuring range (working range), e.g. clean room
applications, air conditioning applications for storage and similar.
The 1-point adjustment can be performed
• via the user menu () or
• via the P2A software (see volume 2, 7.3.4.1. 1-point
adjustment) 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 6381 using testo handheld instrument
✓ The service flap is open, a testo 400/650 handheld instrument
with a precision humidity probe is ready.
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1 Deviation
2 Working point
3 Working range