Powering the VFC400-WiFi
VFC400-WiFi User Guide
27
Low power operation
The VFC400-WiFi enters low power operation when no external power is supplied, and the AAA backup
batteries are empty.
In low power mode…
… all WiFi and cloud connectivity is suspended; real time readings will no longer be transmitted to
LogTag
®
Online
… the audible alarm will sound only once, then be silent
… the display turns off after 30 seconds of inactivity, regardless of the setting made in Control Solutions
VTMC.
… reviewing the data is not possible (however a mark will still be placed if the review button is pressed)
… the unit cannot be started via push button start, however, a recording in progress can be stopped, and a
scheduled date/time start will proceed.
… Min/Max values cannot be cleared
On pressing any button, following is shown on the display:
o
The Recording state indicators show if the unit is
recording, stopped, ready or configured for a delayed
start
o
The
Backup Battery Empty
symbol is shown
The internal secondary backup battery will power the logger's essential functions:
l
the internal clock still runs
l
temperature values are being recorded at the configured intervals
l
the red alert indicator will blink if an alarm is triggered
l
a scheduled recording will still start.
At this time the batteries must be replaced, or external power provided, to activate the suspended functions.
After battery replacement the display may be blank. To activate it, simply press one of the buttons.
The internal secondary backup battery (CR2032 LiMnO
2
coin cell) should be
replaced immediately when its low battery symbol appears. This can be done by a
qualified technician.
Failing to replace the battery can result in loss of configuration information and loss of recorded data.
