Snorkel TB120 2001 User Manual
Page 15
2. SAFETY DEVICES
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EMS LIGHTS & AUDIO ALARMS
There are six envelope management system
(EMS) lights on a TB120.
Three are on the instrument panel.
A second identical set of three is on the platform-
control box.
The EMS ENVELOPE lights (1) give the operator
information about where the platform is located
relative to the platform’s working envelope. (See
the “SPECIFICATIONS” chapter for the TB120
working envelope.) The EMS STATUS (2) and
EMS WARNING lights (3) tell the operator
whether or not the envelope management
system is operating correctly.
NOTE: EMS lights on the platform-control box
have the same names as those on the
instrument panel even though they are not
labeled on the platform-control box.
In addition to EMS lights there are EMS audio
alarms.
Two are above the instrument panel.
Two are on the bottom of the platform-control
box. The audio alarms emit various sounds to
alert the operator to unsafe conditions. The audio
alarms and EMS lights work together to give
valuable safety information. The table below
summarizes that information.
NOTE: When a TB120 engine first starts, the
EMS self-test will briefly sound all EMS audio
alarms and briefly turn all six EMS lights on to
check that they work. After the brief EMS self-
test, conditions in the table below prevail.