Xantrex Freedom XC PRO Series Owner's Manual page 57

Connecting to the BTS Port
Installing a battery temperature sensor (BTS) extends the life of a
battery by preventing overcharging in warm temperatures and
undercharging in cold temperatures. With a BTS monitoring the
battery temperature, the voltage delivered to the battery is
adjusted according to the battery's actual temperature.
The BTS (PN: 808-0232-01) has a self-adhesive backing and
attaches to the side of the battery. A 25-foot (7.6 m) cable is
supplied with this optional accessory.
Figure 17 BTS with Cable
connector
cable
NOTICE
EQUIPMENT DAMAGE
Use only the Freedom XC PRO-compatible Battery Temperature
Sensor (BTS). To order a spare BTS, call customer service and
order PN: 808-0232-01.
Failure to follow these instructions can result in equipment
damage.
975-0799-01-01
sensor
Mounting Options
You can mount the BTS (PN: 808-0232-01) in one of two ways:
Mounting the sensor to the negative battery post allows the
n
internal battery temperature to be sensed and provides the
most accurate results ( on page 41).
Attaching the sensor to the side of the battery using the self-
n
adhesive backing also provides good results in most
situations (on page 42).
To mount the sensor on the negative battery terminal:
1. Select the battery to be monitored. The BTS should be
connected to the battery bank that is directly connected to
the Freedom XC PRO.
2. Switch off all devices operating from the battery, or open the
battery switch (if present) to disconnect the battery.
3. Wait ten minutes for any explosive battery gases to
dissipate.
4. Remove the nut, lock washer, and flat washer that connect
the existing wiring ring terminal to the battery negative
terminal stud.
5. Move or reorient the existing wiring ring terminal on the
battery negative terminal stud, so there is a flat surface on
which to seat the BTS mounting plate.
6. You may need to bend the ring terminal crimp and/or wires
slightly downward to allow the sensor to seat flush to the top
surface of the upper ring terminal.
7. Mount the sensor directly on top of the ring terminal, as
shown in Figure 18 , then the flat washer, lock washer, and
nut. Tighten the terminal nut to a torque of 80 in-lb (9 Nm). A
Basic Installation Procedures
41