VEMCO – VR100 Manual 28 May 2018 58
6.3.2 Maximizing Battery Service Life
The VR100 is powered by a rechargeable lead-acid gel battery. It is normal for the performance of all
rechargeable batteries to diminish gradually over time and with use, but with proper care the VR100 battery
should provide a useful service life of several years.
The conditions that cause the most severe degradation of a battery are over-discharging it, and extreme
temperatures (whether operating or not). To protect against these, the VR100 will automatically shut itself off
if the battery is run down, and it manages its internal temperature by shutting down first the battery charger
then the entire receiver if necessary to keep the temperature below an acceptable limit.
To maximize the service life of your VR100 battery, follow these recommendations as much as possible:
Keep the battery fully charged and avoid completely discharging it. When you see the Low Battery
warning indicated on the LEDs, connect the charger. After each time you use the VR100, recharge
the battery even if it is not fully depleted. A series of partial discharges is
gentler on the battery than a deep discharge.
If the VR100 shuts itself down due to a fully discharged battery, do not turn it
back on until you have connected the charger.
Store, charge, and operate the VR100 between 15° C and 25° C if possible.
Storing the VR100 long term at 35 C will actually reduce the battery’s service life by a factor of
about ½.
Store the VR100 under clean, dry, non-condensing conditions.
6.4 Monitor Screen Explanations
These are more detailed explanations of the Monitor screen, a sample of which can be seen in section 4.2.1.
Coded ping train identification
This indicates which part of a coded ping train is being received. When the first interval, or sync, of a
coded ping train is identified, which requires two pings, an “S” is displayed in the centre of the Monitor’s
top line. With each additional ping, a number is added to the S to indicate how many pings were received
in addition to the sync. When the ping train is complete, the information in the second and third lines and
the time elapsed since the last detection are displayed.
Time of last detection
The time, in hours, minutes, and seconds, of the last detection.
Signal strength
The relative strength of the received signal, between 0 and 105 dB. The value is visually represented on
the bar graph to the right of the numeric value. The signal strength is cleared if a signal hasn’t been
received for more than 10 seconds.
IMPORTANT: The signal strength reading is a relative measure of the voltage level present at the
receiver input (0dB = minimum measureable voltage, 105dB = full scale voltage). It is strictly a relative
measure of signal strength and cannot be used to measure the output power of a transmitter in terms of dB
re 1uPa @ 1m.
Never completely
discharge battery
Fully charge the VR100 battery after every use and before storage. Ensure the battery is charged every three
to four months during storage. If not, the battery can become fully depleted and permanently damaged.
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