445705 V1.1 7/02

User's Guide Model 445705

Hygro-Thermometer Clock

Introduction

Congratulations on your purchase of the Extech Hygro-

Thermometer Clock. This Clock with alarm displays Time,

Temperature, % Relative Humidity, Day, Month and Date. The

clock can be wall mounted or desk mounted using the supplied leg

and screw. Proper care and use of this device will provide years of

reliable service.

Operation

Battery Installation

Insert two 1.5V 'AA' batteries (alkaline batteries are recommended) in the rear battery compartment. Ensure that the

(+) positive and (-) minus terminals of the battery match the positive and negative symbols on the clock's battery

compartment. Battery life is typically one year.

Push button description

1.

SET

Enter the SET mode

2.

UP 12/24

UP increases the set value; 12/24 switches the hour format

3.

DOWN °C/°F

DOWN decreases the set value; C/F switches the temperature units

4.

ALARM ON/OFF

Set alarm and snooze ON/OFF

Setting the Date and Time

1.

Press and HOLD the SET button for three seconds until the hours digit begins to flash.

2.

Press the UP or DOWN button to set the value (or hold for fast scroll).

3.

Press the SET button to step through the selections; hour > minute > day > month > year > exit.

Setting the Alarm Time

1.

Press ALARM ON/OFF to display the alarm set time.

2.

Press and HOLD the SET button for three seconds until the hours digit begins to flash.

3.

Press SET and UP or DOWN to set the alarm hour and repeat to set the alarm minutes.

Turning the Alarm and Snooze ON/OFF

1.

Press ALARM ON/OFF to display the alarm set time.

2.

Press ALARM ON/OFF button three times to turn the alarm on (the alarm “bell” indicator will appear in the

display) and a fourth time to turn the 4 minute snooze on ( the “Zz” indicator will appear).

3.

When the alarm sounds, press the ALARM ON/OFF button to disable the alarm. If the “Zz” snooze is enabled,

the alarm will sound again in four minutes.

Changing Temperature Units

1.

Press DOWN °C/°F to change between degrees Celsius and degrees Fahrenheit.

Changing 12 to 24 Hour clock

1.

Press UP 12/24 to change between a 12 hour and a 24 hour clock.

Specifications

Time

± 30 sec per month

Temperature

14 to 140

Relative Humidity

20 to 90% RH; ± 5%

Copyright © 2002 Extech Instruments Corporation. All rights reserved

including the right of reproduction in whole or in part in any form.