eZ430-Chronos Demo Software
3.2.1.3
Temperature Mode
Press * until the temperature mode is active (see
for details). The temperature can be shown in
degree Celsius or Fahrenheit. The selection depends on the time mode setting. In 12H mode, the
temperature is shown in degrees Fahrenheit, in 24H mode in degrees Celsius. The temperature is
measured in 1-second intervals. Positive temperatures are marked with a small arrow pointing up in the
upper LCD line, left of the temperature. An arrow pointing down indicated temperatures below zero.
Secondary function:
None
Set function:
Temperature calibration (can also calibrated from PC software in Sync mode, see
).
1. Hold * for three seconds until the temperature starts to flash.
2. Set the temperatures by pushing the UP or DOWN button.
3. Press * to confirm the settings.
NOTE:
The temperature is measured inside the wrist module by the CC430 device. When the wrist
module is worn, its temperature may be different from the surrounding temperature due to
body heat. For accurate temperature measurements, do not wear the wrist module and allow
a sufficient amount of time for the wrist module to adapt to the surrounding temperature.
3.2.1.4
Altimeter Mode
Press * until the altimeter alarm mode is active (see
for details). The altitude can be shown in
metric or imperial units. In 12H time mode, the altitude is shown in imperial units. In 24H time mode, the
altitude is shown in metric units. The altitude is measured only when the altimeter mode is active, and
measurement are made in intervals of 1 second.
The implementation of the altitude algorithm is done according to the VTI's application report
without
any additional low-power optimizations. Therefore, the altimeter is active only in altimeter mode. In
addition, a timeout deactivates the measurements after 60 minutes. Altitudes above sea level are
indicated with a small arrow pointing up in the upper LCD line, left of the altitude. Altitudes below sea level
are indicated with a small arrow pointing down.
The altimeter algorithm is based on the air pressure and the ambient temperature. Therefore, changes in
air pressure affect the altitude accuracy. For precise measurements, the altimeter must be calibrated
manually for weather changes.
NOTE:
For most accurate altitude measurement, the wrist module must be fully exposed to the
ambient temperature (that is, the wrist module should not be worn directly on the arm),
because temperature is part of the altitude measurement (see
).
Secondary function:
Re-activate altimeter after timeout
Set function:
Altitude calibration
1. Hold * for three seconds until the altitude starts to flash.
2. Set the altitude by pushing the UP or DOWN button.
3. Press * to confirm the settings.
21
SLAU292F – November 2009 – Revised October 2013
eZ430-Chronos Software
Copyright © 2009–2013, Texas Instruments Incorporated