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00825 - inst08 pg7.pdf, Measurement ranges, Specifications – AcuRite 00825 Weather Station User Manual

Page 7: About the atomic clock, Product registration

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Measurement Ranges

Temperature
Main Unit Temperature: 32ºF to 122ºF / 0ºC to 50ºC

Wireless Sensors:

temperature sensor: -40ºF to 158ºF / -40ºC to 70ºC

humidity sensor: 16% RH to 99% RH

wind sensor: up to 99 mph / 159 Kph (depending on conditions)

Specifications

Power Requirements
Main Unit: 3 x “AA” alkaline batteries

Wireless Sensors:

temperature & humidity sensor: 2 x “AA” alkaline or lithium (recommended) batteries

wind sensor: 2 x “AA” alkaline or lithium (recommended) batteries

Wireless Communication
Radio Frequency: 433 mhz

Transmission Intervals: every 16 seconds

Atomic Clock
Frequency: WWVB 60Khz

Synchronizes Daily

Product Registration

To receive product information, register

your product online. It’s quick and easy!

Log on to http://www.chaneyinstrument.com/product_reg.htm

A clock is considered atomic if it has an accuracy of one second in

a million years. Consumer clocks are considered atomic if they

attain this accuracy by receiving a signal from an atomic clock. In

North America, the National Institute of Standards and

Technologies operates an atomic clock in Colorado which

transmits the time codes via the radio station WWVB. The signal is

transmitted in a very low frequency (60,000 Hz). The Acurite clock

you have purchased includes a built-in receiver which picks up the

signal from the WWVB station. NOTE: Due to solar radiation in the

atmosphere, the atomic clock signal is weak during the day. Most

synchronization with the WWVB atomic clock signal happens at

night when there is less interference.

About the Atomic Clock

PLEASE DISPOSE OF OLD OR DEFECTIVE BATTERIES IN AN ENVIRONMENTALLY

SAFE WAY AND IN ACCORDANCE WITH YOUR LOCAL LAWS AND REGULATIONS.

BATTERY SAFETY: Follow the polarity (+/-) diagram in the battery compartment. Promptly remove dead
batteries from the device. Dispose of used batteries properly. Only batteries of the same or equivalent

type as recommended are to be used. DO NOT incinerate used batteries. DO NOT dispose of batteries in fire, as
batteries may explode or leak. DO NOT mix old and new batteries or types of batteries (alkaline/standard). DO NOT use
rechargeable batteries. DO NOT recharge non-rechargeable batteries. DO NOT short-circuit the supply terminals.

ALWAYS USE PROPER TOOLS AND MOUNT/PLACE SENSORS IN AREAS THAT
WILL BE SAFE TO YOURSELF AND OTHERS. SEEK PROFESSIONAL ASSISTANCE
IN MOUNTING/PLACING THE WIRELESS SENSORS AND FOLLOW YOUR LOCAL
LAWS AND REGULATIONS WHEN CHOOSING A MOUNTING/PLACEMENT
LOCATION FOR THE WIRELESS SENSORS