ASPIRE Software
7-42 VESDA Student Workbook
VESDA VES scanner
• The VES is a 4-port scanner
• Each pipe is addressable and supervised for
smoke, flow, and transport time (TT)
• When the VES sees smoke, it trips an alarm
and starts scanning each pipe for smoke
• While this scanning process is underway, the
aspirator pulls air through the open inlet
– As a result, we care about TT during non-
scan operation only
VES Scan vs Non-scan modes (Non-Scan)
NON_SCAN mode
The highlighted parameters are needed
to verify the pipe properties, TT,
pressure, and flow.
NOTE: during the non-scan
mode we focus on performance
parameters, not Sensitivity
To switch between SCAN and non-scan mode,
click on the VES, VIEW, then SCAN
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