RH490 datasheet(5/7 Pages) EXTECH

Part #	RH490

Description	Precision Hygro-Thermometer

PDF	7 Pages

Scroll/Zoom	100%

Manufacturer	EXTECH [Extech Instruments Corporation.]

Direct Link	http://www.extech.com

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5 / 7 page

RH490 V2.0 12/06

Dew Point

1. To select the Dew Point measurement, press the

“°F/°C/WBT/Dew Point” button until DEWPOINT

(°F or °C) appears in the lower right.

2. Dew Point temperature is now displayed.

Wet Bulb

1. To select the Wet Bulb measurement, press the

“°F/°C/WBT/Dew Point” button until WET BULB

(°F or °C) appears in the lower right.

2. Wet Bulb temperature is now displayed.

Temperature

To select the temperature measurement, press the

“°F/°C/WBT/Dew Point” button until “°C” or “°F”

appears in the lower right.

Temperature is now displayed.

Data Hold

Press the ”H MAX MIN” button momentarily to

freeze the displayed readings. ”HOLD” will appear

on the upper left-hand side of the display.

Press the ”H MAX MIN” button three more times to

return to normal operation. (Steps through MAX

and MIN)

RH490 Datasheet(PDF) 5 Page - Extech Instruments Corporation.