If you have a Veeder Root TLS 450 PLUS and you have double wall tanks and double wall piping, interstitial monitoring is a way to look for leaks. Let’s make sure the sensors are not in alarm, and prove it by printing it.
If the top bar is green, the system is not in alarm. Green = good. It says “0 Warning(s)” and “0 Alarm(s)”.
Go to Menu → Reports → Environmental → Sensor Status.
You’ll see individual sensors. Status NORMAL means no alarm.
If you want to prove this information, click on the Print button. It will say “Document was sent to printer.”