RH390 V2.0 03/05

2

Specifications

Function

Range and Resolution

Accuracy

Humidity

0.0 to 100.0%RH

±2%RH (20% to 90%)

±3%RH (10% to 20% and 90 to 95%)

±4%RH typical at 1% and 99%

Temperature

-4.0 to 158.0

(-20 to 70

±1.8

-22.0 to – 3.9

and 158.1 to 199.0

(-30.0 to -19.9

and 70.1 to 100.0

±2.7

Display

Dual LCD

Response Time:

<30 seconds (90% of final value in moving air)

Sensor Type

Humidity: Precision capacitance sensor

Temperature: Thermistor

Wet Bulb

32 to 176°F (0 to 80°C) (calculated from RH and Air

temperature measurements)

Dew Point

-22 to 199°F (-30 to 100°C) (calculated from RH and Air

temperature measurements)

Operating Conditions 32 to 122

Storage Conditions

-40 to 185

Power Supply

9 Volt battery

Battery Life

Approx. 24 hours

Dimensions / Weight 7.8 x 1.7 x 1.3” (200 x 45 x 33mm); 7 oz. (200g)

Warranty

EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free

of defects in parts and workmanship for one year from date of shipment (a six

month limited warranty applies to sensors and cables). If it should become

necessary to return the instrument for service during or beyond the warranty

period, contact the Customer Service Department at (781) 890-7440 ext. 210 for

authorization or visit our website www.extech.com for contact information. A

Return Authorization (RA) number must be issued before any product is returned

to Extech. The sender is responsible for shipping charges, freight, insurance and

proper packaging to prevent damage in transit. This warranty does not apply to

defects resulting from action of the user such as misuse, improper wiring,

operation

outside

of

specification,

improper

maintenance

or

repair,

or

unauthorized modification. Extech specifically disclaims any implied warranties

or merchantability or fitness for a specific purpose and will not be liable for any

direct, indirect, incidental or consequential damages. Extech's total liability is

limited to repair or replacement of the product. The warranty set forth above is

inclusive and no other warranty, whether written or oral, is expressed or implied.