XR-3 TS2 Module Operation Manual
XR-3
Page 60 of 66
15. Power
LNB Power
The LNB current is limited to different values under different conditions:
Current Limit
1)
Normal battery operation:
780 mAmps
2)
Charger active (AC):
780 mAmps
3)
IRD power to LNB:
950 mAmps
Under conditions 1 and 2, an inrush current of 900 mAmps is allowed for a short period of time.
Battery Charge
1) Charging: Use either the AC to DC switching power supply or the 12VDC vehicle charger.
To fully charge a dead battery, it should require approximately 3 hours. It is okay to leave
the meter charging all night since the meter will go into trickle charge mode when the
battery is almost fully charged. During cold weather keep the XR-3 indoors in a warm
environment while charging. The battery charge temperature range is 41°F to 100°F or
5°C to 38°C.
2) Discharge / Charge: Before initial use of the meter you should fully discharge the battery
and then recharge overnight. To quickly discharge the battery, disable the automatic
shut-off in the Options menu, connect-to and power an LNB until the meter shuts off. To
fully discharge the battery, disconnect from the LNB, power up the meter and let it die
from powering itself.
3) Battery Charge Symbol: The battery symbol indicating remaining battery life in the lower
right corner of the LCD display can be misleading. If not powering an LNB it may display
full, even if it is not. It is more accurate when connected to an LNB load. It is normal for
the battery symbol of a fully charged battery to quickly drop by ¼ when powering an LNB.
The symbol should remain in the middle two segments for the longest time period, and
will again drop faster when the last battery symbol segment is displayed. In summary the
symbol drops by 25% quickly, remains in the middle 50% the longest, and then the last
25% drops quickly.
The symbol’s behavior is nonlinear. The battery charge indicator is based on the internal
battery voltage, which changes slowly during the normal period of operation but quickly
when the battery is either fully charged or nearly discharged. Therefore, the battery
indicator will only appear full or empty for a short time. Most of the time, it will appear ½
or ¾ full. When the charge indicator shows ¼ charge, you will need to charge it soon. It
will shut off very soon after the indicator goes to empty.
4) Automatic Shutoff: If desired you can activate the automatic shutoff feature. To activate
it, press MENU
OPTIONS and then scroll to the Shutdown field with your Up/Down
arrows and use the Left/Right arrows to choose the desired auto shut-down time (5 min,
10 min, 15 min, NONE). The auto shutdown feature is turned off (set to NONE) in its
default state.
5) LNB Power Awareness: Only power the LNB while taking measurements. Avoid
powering an LNB while not actually taking measurements.
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