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Startup Operation and Indication
5.2.8
Harmonics Key
Press the HARMONICS key successively to view the harmonics data that applies to the measured
electrical system. Each screen lists the total harmonic voltage and current, and THD for each of
the measured phases.
Figure 5.20: Harmonics Key
5.2.9
Flicker Key
Press the FLICKER key once to view voltage and current flicker measurements for all of the three
phases.
Figure 5.21: Flicker Key
5.3
Unlocked and System Fault Indication
Should there be a System Fault with the operation of the 1133A, the Unlocked and/or Fault
Annunciator LED may switch ON. A System Fault alarm occurs with hardware/firmware failures
with the 1133A itself; it is
not a generated fault from the measured electrical system
. When the
Unlocked LED switches ON, it indicates that the 1133A has lost synchronization with the GNSS
satellites.
5.3.1
Unlocked Indication
Normally, throughout the day you should see the TRACK number change as satellites pass across
the sky, in and out of view of the GNSS antenna. If there is a problem with the satellites, antenna,
cable or GNSS receiver, there may be a time when it will indicate zero satellites tracked and the
Unlocked LED will turn ON. It is a very remote possibility that there would be a problem with
the satellites, however more likely that there is a problem with the antenna/cable combination.
Most likely problems are installation problems, such as a bad cable/antenna connection, or that
the antenna or cable was damaged or has failed.
If the Unlocked LED should not switch OFF at startup, or remain ON after the normal amount
of time, it may indicate that there is a problem with the antenna/cable connection. To troubleshoot
the antenna/cable system, please refer to Section 4.2, Antenna and Cable Testing.
5.3.2
Fault Indication
If the Fault LED should switch ON, you may be able to view the reason for the fault directly on the
display. These faults are hardware-related faults that could occur due to problems with memory