VAR4 / VAR12 / VAR20 - Operation Manual
sue: 03 complete, approved ed
Is
Page 63 of 308 Page 63 of 308
Note: In an ASL system with the surveillance tone level set to its default level of –12dB, the typical
thresholds values reported by the surveillance card are:
Note: In an ASL system with the surveillance tone level set to its default level of –12dB, the typical
thresholds values reported by the surveillance card are:
Input Threshold = 200–300mV Input Threshold = 200–300mV
Output threshold = 600–900mV Output threshold = 600–900mV
Refer to Section “12.4 Surveillance Tone Generation Configuration” for surveillance tone level
configuration.
Refer to Section “12.4 Surveillance Tone Generation Configuration” for surveillance tone level
configuration.
Suggested thresholds are only shown if the user is logged on as User 2 and the AC surveillance
has been set to ‘LF’ or ‘HF’ in Section “6.3.4.2.1 Configuring an Amplifier’s AC Surveillance
Tone Frequency Range”.
Suggested thresholds are only shown if the user is logged on as User 2 and the AC surveillance
has been set to ‘LF’ or ‘HF’ in Section “6.3.4.2.1 Configuring an Amplifier’s AC Surveillance
Tone Frequency Range”.
Automatic updates to the VAR Router LCD display will occur after a short delay (aprox.
10 seconds).
Automatic updates to the VAR Router LCD display will occur after a short delay (aprox.
10 seconds).
7. It is possible to use the automatically suggested thresholds as commissioned values, or edit them in
which case the VAR Router stops refreshing data from the selected mainframe.
7. It is possible to use the automatically suggested thresholds as commissioned values, or edit them in
which case the VAR Router stops refreshing data from the selected mainframe.
8. To edit, move to the threshold field to be modified and scroll it until the required value is displayed. 8. To edit, move to the threshold field to be modified and scroll it until the required value is displayed.
9. In either case, commission the amplifier by pressing the SELECT key, or cancel by pressing the BACK
key.
9. In either case, commission the amplifier by pressing the SELECT key, or cancel by pressing the BACK
key.
Note: Once commissioned the selected mainframe will use the new commissioned limits for fault
detection.
Note: Once commissioned the selected mainframe will use the new commissioned limits for fault
detection.
A continuous surveillance tone is required to set the threshold levels. The VAR Router will
automatically make all Pulsed Surveillance tones continuous during this set-up process.
A continuous surveillance tone is required to set the threshold levels. The VAR Router will
automatically make all Pulsed Surveillance tones continuous during this set-up process.
!
!
The system will return to the parent menu after 3 seconds on pressing the SELECT key, or immediately
on pressing the BACK key.
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