Vaisala HUMICAP HMP140A Guia do Utilizador descarregar pdf (Página 14)

HMP140A SERIES

Operating Manual U175en-1.5

10 1999-12-08

• Use the RH offset potentiometer (see Figure 4.2) to adjust the output

signal to the value given in the calibration table (Chapter 4.4).

• Place the probe into the calibration hole of the NaCl bottle in the

calibrator.

• Wait for 10 minutes.

• Check that the reading corresponds within the desired accuracy to the

reading given in the calibration table. If not, adjust the reading with

the RH gain potentiometer (see Figure 4.2).

• Check again the reading at the first point and adjust if necessary.

DISPLAY CONNECTOR

Tgain

Toffset

RHoffset

RHgain

PROBE CONNECTOR

Figure 4.2 Calibration potentiometers

4.3 Temperature calibration

One point temperature calibration can be performed with the HMI41 equipped

with an appropriate probe and optional calibration cable if the accuracy of

+0.5 °C is sufficient. For further details, see the operating manual of the

HMI41 and calibration option.

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