Extech 445850-CP Instruction Manual

INSTRUCTION MANUAL

Hygro-Thermometer Calendar Clock

Extech Models 445800 & 445850

Model 445800 Model 445850

SPECIFICATIONS

Temperature 14oF to 140oF (-10oC to +60oC) + 3.0oC Humidity 20% to 90% + 5% RH Power 1 x CR2032 watch battery Battery life 10 to 12 months typical Display type Multifunction LCD Calendar range 1-1-1996 to 31-12-2050 Snooze alarm Every 4 minutes (4 times)

KEY FUNCTIONS (IN NORMAL MODE)

Down key: Toggle degrees C/F Up key Toggle 12/24 hour format Setting key Enter the TIME and ALARM setting modes Time/Year key Toggle time and year format Alarm key Switch to the Alarm mode Calendar key Enter the calendar mode

SETTING THE REAL TIME CLOCK

Press and hold the SETTING key until the hour digit begins to flash. Use the UP/DOWN keys to set the hour. Press the SETTING key again and the minutes digits will flash. Use the UP/DOWN key to set the minutes. Press the SETTINGkey again and the day digit will flash. Use the UP/DOWN key to set the day. Press the SETTING key again and the month digit will flash. Use the UP/DOWN key to set the month. Press the SETTING key again and the year will flash. Use the UP/DOWN key to set the year. Press the SETTING key again to return to normal operation.

SETTING THE ALARM TIME

Press the Alarm key (2nd from right) to enter the alarm mode, the large LCD digits will reflect the current alarm time. Press the SETTING key and the alarm hour digits will flash. Set the alarm hour using the UP/DOWN Arrow keys. Press the SETTING key again so that the alarm minutes are flashing. Set the minutes using the UP/DOWN Arrow keys. Press the SETTING key again to return to normal operation.

ARMING THE ALARM

Press the Alarm key (2nd from right) and then press the Alarm/Snooze key (3rd from right) until the BELL symbol appears above the minutes digits. The alarm will sound when the actual time matches the alarm time. The alarm will automatically discontinue sounding after 4 times.

SELECTING THE SNOOZE FUNCTION

Press the Alarm key (2nd from right) and then press the Alarm/Snooze key (3rd from right) until the Zz indication appears above the minutes digits. The snooze alarm is now activated.

USING THE CALENDAR

Press the CALENDAR key and the month digit will begin flashing (the year will also appear on the main LCD display). Use the UP/DOWN keys to look ahead or back in time the same way one would use a paper calendar.

REPLACING THE BATTERY

Use a very small philips head srewdriver to remove the screw which holds the battery compartment cover. Replace CR2032 battery observing polarity and re-affix the battery compartment cover.

SELECTING THE TEMPERATURE UNITS C/F

Press the C/F key to toggle the temperature units.

SELECTING 12/24 HOUR CLOCK

Press the 12/24 HR key to toggle the clock functions.

Range Accuracy

Ver. 1.02 11/99