User's Manual
Hygro-Thermometer Calendar Clock
Model 445800
Introduction
Congratulations on your purchase of Extech’s Hygro-Thermometer Calendar Clock. This
professional meter, with proper care, will provide years of safe reliable service.
Specifications
Temperature Range
14 to 140
o
F or -10 to 60
o
C (selectable)
Humidity Range
20% to 90% RH
Accuracy
Temperature: 5
o
F (±3
o
C)
Relative Humidity: ±5%RH from 30 to 80% RH
Calendar range
Up to 12-31-2050 (December 31, 2050)
Alarm snooze
4-minute interval2 (4 times max.)
Clock
12 hour or 24 hour clock (selectable)
Battery
One CR-2032 button battery
Dimensions/Weight
3.4 x 3.5 x 1" (86.4 x 89 x 25.4mm) / 5oz.
Meter Description
1. Calendar key
2. Alarm key
3. Time/Year and Alarm/Snooze key
4. Setting key
5. UP and 12/24 Hour key
6. Down and C/F key
7. Minutes:Seconds display
8. Monthly calendar display
9. Week/Day/Month display
10. Temperature/Humidity display
11. Tilt stand
Operation
Powering the unit
Open the battery compartment and remove the plastic battery tab to turn on the unit.
Real Time Setting
1. Press and hold the
Setting
key for 1 second until the hours display blinks.
2. Use the
Up
/
Down
keys to set the correct value (observe the PM setting).
3. The
Setting
key advances through the settings (Hour / Minute / Day / Month / Year).
6 5 4 3 2 1
7
8
11
10
9
