INNO 320 - LCD Screen Performance at Low Temperature; Status Indication When Display is Lost

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disabled automatically. It is because the battery power will drop much when
it is in a low temperature environment, disable the backlight helps to reduce
the power consumption, so that the instrument still can work stably in such
low temperature environment.
LCD screen performance at low temperature
At low temperature, the response speed of the LCD will slow down and the contrast
of the screen will decrease. These are normal for the LCD screen.
Temperature range
LCD response speed
Above 0 °C
Above 32 °F
Very fast
0 °C ~ -10 °C
32 °F ~ 14 °F
About 1 second
-10 °C ~ -20 °C
14 °F ~ -4 °F
About 2 seconds
-20 °C ~ -30 °C
-4 °F ~ -22 °F
About 3 seconds
Lower than -30 °C
Lower than -22 °F
May be not able to display
Status indication when display is lost
 In environment below -30 °C / -22 °F, the LCD may not be able to display
content, but the INNO 320 is still working fine. At that situation, the user can
press the key and observe the flashing of the LED to understand the status of
the instrument. The green LED indicates the instrument's operating mode and
the red LED indicates the alarm.