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8.4. VARIABLE LED BRIGHTNESS
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8.4 Variable LED Brightness
This instrument uses s sensor that detects the ambient light level. The ambient light is then
converted into three states - dark, medium, and bright. Each state affects the brightness of
the device LEDs to provide daytime visibility as well as prevent blinding nighttime viewing.
A bright state will cause maximum intensity of the status indicator LEDs if they are on. A
dark state will set the indicator LEDs to the dimmest setting as well as activate the automatic
backlight. While the preset values should be sufficient, in an unusual configuration, Lumic
Calibration allows setting the thresholds, with hysteresis, of the ambient light states.
8.4.1 Backlight
The intensity of the backlight is configurable on this instrument through Lumic Calibration
software. This setting is preset to optimize battery life and viewability. However, if a change
is made, the thresholds for the ambient light levels may need to be modified due to self-
illumination from the backlight.
8.4.2 Ambient Light Value
In Lumic Calibration software, the ambient light parameter shows the current value of the
ambient light sensor. This is a raw reading from the ambient light sensor used to assist in
redefining the ambient light state thresholds.
8.5 Audio
This instrument utilizes software controlled audio. There are three types of tones that can
be generated - a low tone used for clicks and alert audio, a high tone used for alarms, and a
tone for buttons. Each of the settings is configurable in the Lumic Calibration software.
The volume can also be controlled for click volume, alert/alarm volume, and for button vol-
ume. The click and alert/alarm volumes are a combined setting in the device setup menu. If
using Lucmic Calibration software, all three volumes are configurable independently. There
are four levels of volume: 0, 1, 2, and 3 with 0 being off.
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The audio chime during the power-on sequence uses the three tones in the
order of button tone, low tone, and high tone. The volume of all three tones
is the alert/alarm audio volume; therefore, if no chime is heard on power-on,
alert/alarm volume may be set to 0.
8.6 Low-Battery Alarm Interval
This feature is intended for use when the device is normally externally powered but needs
to be ready to run on internal power. Externally powered applications tend to rely on alerts
and alarms to get the user’s attention. A low-battery state can go unnoticed in a typically
uneventful environment.
June 2022
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