TED-TX / RX
Page 6
2.2. Using Alkaline Batteries:
Each TED needs 6 Alkaline batteries (type AA). The LED (3) shows the battery capacity during
normal operation.
Blinking of LED (3):
The LED has in the signal
strength test a different
function (see point 3.5).
The TED switches automatically off, as soon as the battery voltage is lower than 5 Volt!
Attention:
If you buy replacement batteries for a event, be aware that you need for each TED
(receiver and transmitter) six batteries.
Empty Battery Warning:
TED-TX: When the LED (3) switches to red on the TX, it sends along with the next impulse or data
string a message to the TED-RX. The TED-RX then turns on an alternating high and low
sound to indicate that the TED-TX needs new batteries.
TED-RX: When the LED (3) switches to red an alternating high and low sound indicates that the
TED-RX needs new batteries. Make sure you check both units every time you hear teh
alternating sound.
Working duration of batteries:
The measurements shown bellow are made with Alkaline batteries (type Energizer) at room tem-
perature (25°C, 77 F). Please notice that the capacity of batteries drops fast at low temperatures (at
-20°C (-4F) about 20 % capacity).
Color of LED (3)
Battery Capacity
green
35 to 100 %
border between green and orange
about 35 %
orange
20 to 35 %
border between orange and red
about 20 %
red
less than 20 %
off
empty
TED-TX10
without photcell
1 impulse per minute
about 300 hours
TED-TX10
with photocell
1 impulse per minute
about 66 hours
TED-TX10
---
1 data transmission per minute
about 270 hours
TED-TX10
---
continues data transmission
about 54 hours
TED-TX400
without photcell
1 impulse per minute
about 270 hours
TED-TX400
with photocell
1 impulse per minute
about 60 hours
TED-TX400
---
1 data transmission per minute
about 54 hours
TED-TX400
---
continues data transmission
about 6 hours
TED-RX
---
in all equal
about 54 hours