The Noise-Sentry-RT-Whas four modes of operation:

Mode

Operation

Power Consumption

Idle

Disconnected from USB and not actively recording - Only keeps time.

Minimal: can stay on for up to 6 months.

Active

Connected to USB – Not recording – Instrument is fully on and measuring

Instrument draws power from USB to power itself, and if necessary recharge its battery. Battery is not depleted.

Recording

USB-connected or not - Fully on and recording.

If USB-connected, power comes from USB. If not, power comes from the battery. If not connected the instrument can record for up to 7 days.

Periodic WiFi™ Connect

From any state, including Idle and Recording, the instrument can periodically wake up its WiFi™ interface and attempt to connect to a server. If the connection is not established after 1 minute it falls back to its original state until the next connection time.

If USB-connected, power comes from USB. If not, power comes from the battery. The Periodic Connect feature consumes battery. This is especially the case if the connection interval is set to be short so it occurs often.

 

Table 1