VEMCO - VR2Tx Manual
15 March
2019
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Changing an action is also possible in the Control Setting window, without enabling the query. For example,
if “No” was selected when the “Import offloaded files into database” was disabled and you now want to
import the data without being queried each time, then click the drop-down menu next to the answer and select
“Yes” from the list.
Be sure to select “OK” to apply the changes.
6.4
Battery
The VR2Tx receiver is powered by a single “D” size 3.6 Volt Lithium battery with a
connector attached – the Tadiran TL-5930/F. Specifications for the Tadiran battery are
found in section 9.3 (Appendix). Other battery options, including a non-dangerous goods
battery option, are available directly from VEMCO. Contact VEMCO if you are
interested in more information on these alternatives.
An important feature of the approved lithium batteries is their voltage discharge
characteristics. These batteries provide a consistent voltage for most of the life of the
battery, as demonstrated with the blue line in the graph below. This characteristic allows the receiver to
operate at the necessary voltage levels longer than a battery with a more gradual voltage fall-off. This can be
seen by comparing when the blue and green lines in the graph below cross the red “cut-off voltage” line.
As the graph illustrates, the battery voltage reported by a receiver may be at the correct level for proper
operation even when the battery is close to the end of its life. The voltage value reported by a VR2Tx
indicates the battery is at the proper voltage at the moment but does not give any indication of the remaining
life of the battery. For that reason, we suggest you write the date on the battery when it is installed in the
receiver.
The VR2Tx is usually shipped with the battery inside the VR2Tx but not connected – the VR2Tx is not
shipped powered. Battery life is consumed from the time the battery is connected so always disconnect the
▬
= Tadiran lithium
▬
= Alkaline sample
▬
= VR2Tx minimum
