Narda 22 Nardalert S3
4 Getting started
If the sensor is defective or not attached to the basic unit, the start-
up sequence will be stopped – screens in Figures 4 and 5 will not be
displayed.
If the calibration is more than 2 years old for the sensor, or 4 years old
for the basic unit the calibration screen (Figure 4) will have a red back-
ground and one of the buttons needs to be depressed to continue.
Normal operation
The operation screen (Figure 5) displays the detected elds from the low
and high frequency sensors separately to provide information to the
wearer about the type of source creating the display. The display considers
1 GHz (approximately) as the separator between low and high frequencies.
Alarm indication
If an alarm threshold is exceeded (Figure 6) the top color bar will change
from Green to Yellow (Alarm 1) and from Yellow to Red (Alarm 2), if two
alarms are used. If only one alarm is used, then the color bar will change
from Green to Red (Alarm). The wearer also receives audible, vibrate
and LED visual indications when alarm thresholds are exceeded (factory
defaults).
Figure 4 Calibration
and Date Screen
Figure 5 Normal
Operation Display
(RF/ microwave only)
Figure 6 Alarm levels
and color changes (not
actual screen)
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