Vaisala Humicap HMW60U Betriebsanweisung PDF herunterladen (Seite 11)

Chapter 2 ________________________________________________________ Product Description

VAISALA ________________________________________________________________________ 9

CHAPTER 2

PRODUCT DESCRIPTION

Vaisala HUMICAP

Hand-Held Temperature and

Humidity Meter HM70

HM70 consists of two main units: MI70 indicator and

HMP75/HMP76/HMP77 probe. HM70 Hand-held humidity meter

incorporates Vaisala's advanced HUMICAP

technology which

enables reliable and high performance humidity measurement.

HM70 is available with an optional, ready-to-use Microsoft

Windows

software, which allows an easy way to handle

measurement data using a serial line or a USB instrument cable.

Vaisala HM70 is delivered with a factory calibration certificate.

Display Parameters

- RH relative humidity (% RH)

- T temperature (°C/°F)

- T

d/f

: dewpoint/frostpoint

temperature (°C/°F)

- T

: dewpoint temperature

(°C/°F)

- a : absolute humidity (g/m

/ gr/ft

)

- x : mixing ratio (g/kg / gr/lb)

- T

: wetbulb temperature (°C/°F)

- H

O: humid air volume/ dry air volume (ppm)

- pw: water vapour pressure (hPa/ lb/in

)

- pws: saturation water vapour pressure(hPa/ lb/in

)

- h : enthalpy (kJ/kg / Btu/lb)

- a

: water activity

d/f

shows dewpoint temperature above the freezing point

(0°°C/32 °°F) and frostpoint temperature T

(dewpoint over ice)

below the freezing point.

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