16
Sentinel
™
Data Loggers
Sentinel
™
Data Loggers
17
There are two thresholds for the battery voltage depending on how the
instrument is turned ON (either button press or DataView
®
) and the record-
ing state that it is in.
•
If the unit is turned ON from a button press, the threshold is
4.3V.
This means that if the unit is turned on and the battery voltage is
below 4.3V, the RED LED will double-blink and the unit will turn off.
•
If the unit is turned ON via DataView
®
, the threshold is 3.8V.
This means that the instrument can be turned on via DataView
®
as long as the battery voltage is above 3.8V. If the instrument is
recording, it will continue to record until the battery voltage falls
below 3.8V.
4.4 Recording Data
4.4.1 Starting and Stopping a Recording Session
NOTE:
The Sentinel
™
Data Logger is factory configured and may be altered
to fit the users needs
(see § 5.5 - Configuring the Sentinel
™
Logger)
.
Once a configuration is written to the Sentinel, the logger will no longer
need to be connected to DataView
®
to start the configured recording.
When data is stored in the memory, the user may download the informa-
tion onto a hard-disk
(see § 5.13 - Downloading Recorded Instrument
Data)
.
To Start Recording:
NOTE:
A new recording may not be started if the memory is full.
1. Connect the inputs to the measurement source.
2. Make sure the logger is in STANDBY mode
(GREEN LED single-blinks)
.
3. Press the
PRESS
button for longer than 1.5s but less than 3s to start
recording.
4. Verify that the GREEN LED double-blinks to ensure that the logger is
recording.
Warning:
If, during a recording, the GREEN LED remains ON,
the Sentinel
™
Data Logger is in a fault condition. Disconnect
immediately (the logger will not record and the battery will
drain faster).
