Daily Alarm Setting; Snooze Alarm; 12/24 Hour Display Mode; Thermometer And Relative Humidity Displays - Extech Instruments CTH10A User Manual

Daily Alarm Setting

Press "MODE" button (B2) to view the Alarm Time, "AL" is shown on the display.

When viewing the Alarm Time, hold "MODE" button (B2) for 3 seconds to enter the
Alarm Time setting mode. Press "+" (B3) or "‐" (B4) button to adjust the alarm time. Press
the "MODE" button (B2) to confirm the setting and move to the next setting.

Press "AL ON/OFF" Button (B6) to activate or deactivate the alarm. If the alarm is on, the
alarm icon "
Snooze Alarm

Press the "SNOOZE" (B1) button when the alarm tone sounds. The alarm snoozes for
approx. 5 minutes, after which time it alerts again. "
snooze time. This process can be repeated 7 times.

Except for the "SNOOZE" button, any button can be pressed to stop the snooze alarm.
Otherwise, the alarm signal sounds for 2 minutes, then stops automatically.
12/24 Hour Display Mode
Press the "12/24" (B3) button to select the 12 or 24 hour mode.
Thermometer and Relative Humidity Displays

The CTH10A includes internal temperature and relative humidity sensors. Temperature
and relative humidity measurements are displayed on the lower right side of the clock.

Press the "°C/°F" (B4) button to select C: Celsius or F: Fahrenheit units.

If the temperature exceeds the measurable range, LL.L (beyond the minimum
temperature) or HH.H (beyond the maximum temperature) will be shown on the LCD.
Important Notes

The clock loses time information when the batteries are removed.

Do not expose the Clock to direct sunlight, extreme temperatures, or high humidity

Never clean the device using abrasive or corrosive materials or products. Use a damp
cloth to wipe the housing clean as necessary.
" appears on the display.
4
EXTECH INSTRUMENTS
" flashes on the LCD during the
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