Echowell echo a1, Руководство пользователя

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Functions
The display of the computer can be divided into three sections –
upper, middle, and lower display.
In General Mode, the LCD display of your computer is as below:
The current altitude is always shown on the upper display, and it's
easy to calibrate it when necessary. For Echo-a1 users, current
speed and temperature are always shown on the middle display.
For Echo-a2 users, current speed and current RPM are always
shown on the middle display. And most functions are shown on
the lower display-- you may press the A button to view each
function display.
Regarding the functions marked with

listed below, the data
can be reset to zero by the reset operation. (When in General
Mode, press the A button for 3 seconds to reset the
computer.)
ALTI Current Altitude
1. The current altitude is always displayed on the upper display.
2. To get accurate basis altitude, the cyclist should calibrate the
altitude before each ride.
3. The measurement is based on the principle that atmospheric
pressure decreases as elevation increases.
4. The altitude is measured by means of the atmospheric pressure,
so it's weather-dependent.
5. You may obtain the altitude data from a topographic map or the
Internet.
6. The altitude of the altimeter is pre-calibrated by the precise
instrument at the factory before shipment.
Current Speed
1. The current speed is always shown on the middle display during
riding.
2. The speed data are updated per second.
3. For Bike 1, when you do not ride the bike for more than 4
seconds, the speed data will be reset to zero.