User's Manual

Table Of Contents

eZ430-Chronos Sports Watch Software

www.ti.com

3.2.1.3 Temperature Mode

Press "*" until the temperature mode is active (see Figure 3-1 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

Section 3.3).

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 watch right inside the CC430 device. When the

watch is worn, the temperature of the watch may be different due to the body heat. For

accurate temperature measurements, do not wear the watch and allow a sufficient amount of

time for the watch to adapt to the surrounding temperature.

3.2.1.4 Altimeter Mode

Press "*" until the altimeter alarm mode is active (see Figure 3-1 for details). The altitude can be shown in

metric or imperial units. In 12H time mode, the altitude is shown in imperial, in 24H time mode in metric

units. The altitude is measured only when the altimeter mode is active, and measurement happen in

intervals of 1 second.

The implementation of the altitude algorithm is done according to the VTI's application report AN33 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 needs to be calibrated

manually upon weather changes.

NOTE: For most accurate altitude measurement, the watch needs to be fully exposed to the ambient

temperature (that is, the watch should not be worn directly on the arm), because temperature

is part of the altitude measurement (see Section 3.2.1.3).

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.

eZ430-Chronos Software SLAU292D–November 2009–Revised March 2011

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