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LCD Backlight:
• LCD backlight is activated when BL/FROST or
any key is pressed. The backlight will
automatically turn off 5 seconds after all keys are
released.
• LCD backlight will not operate when battery is
low.
• LCD backlight is illuminated throughout the
Setpoint Temperature setting.
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7
Low-Battery Detection:
Battery voltage is sampled every minute. When the
battery voltage drops to a certain level, the Low-
Battery warning indicator appears.
• The thermostat functions normally during
battery low. However, user must change the
batteries as soon as possible before they are
so weak that normal operation cannot be
assured.
• Battery voltage is determined as "low" when it is
less than or equal to 2.6V. It is determined as
normal when it is higher than or equal to 2.8V,
i.e. Low-Battery indicator must come out when
battery voltage is <= 2.6V, and must be turn off
when battery voltage is >= 2.8V.
• Battery voltage is only sampled in Normal mode
and when LCD backlight is turned off.
Sleep Mode:
•
Press and hold
simultaneously to enter the Sleep mode
•
All the functions will be paused to save
power.
•
The whole LCD will be blank.
•
Output will be turned off immediately.
•
Press any key to wake up the unit.
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and
for 3 seconds
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