Vaisala HMP243 Betriebsanweisung PDF herunterladen (Seite 64)

HMP240

User's Guide M210300en

8. TECHNICAL DATA

Sensor RH & T composite sensor

HUMICAP

KC(part no.

18258HM)

T sensor in the humidity sensor head Pt 100 IEC 751 class 1/3 B

Voltage proof, AC: DC supply (+ or -) to housing 250 VAC, 1 minute

(300 kΩ and 15 nF parallel)

8.1 Dewpoint temperature

typical range of dewpoint temperature -40...+100 °C

Response time (90 %) at +20 °C in 15 s

still air (with sintered filter)

0 20 40 60 80 100

Dewpoint difference (°C)

Difference between ambient temperature and dewpoint temperature

Accuracy in dewpoint

measurement (°C)

-20

60-40

Dewpoint temperature (°C)

100

Figure 8.1 Accuracy in dewpoint measurement as a function of

depression and dewpoint (NOTE: dewpoint < 0 °C = calculation of

frostpoint)

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Vaisala HMP243 Betriebsanweisung Seite 64