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Connecting to the BTS Port
Installing a BTS (battery temperature sensor) (optional, PN:
808-0232-01) 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 (battery temperature sensor) 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.
NOTE: Prior to mounting the BTS, route and wind the BTS
cable two times through the ferrite core (supplied with the BTS)
before extending the connector to the port and the sensor to the
battery. The ferrite core has to be closest to the Freedom EX
4000's BTS port .
Figure 29 BTS with Cable
ferrite core
2x
connector
cable
NOTICE
EQUIPMENT DAMAGE
Use only the Freedom EX 4000-compatible BTS (battery
temperature sensor). To order, call customer service and order
PN: 808-0232-01.
Failure to follow these instructions can result in equipment
damage.
Mounting Options
You can mount the optional BTS (battery temperature sensor) in
one of two ways:
Mounting the sensor to the negative battery post allows
n
the internal battery temperature to be sensed and provides
the most accurate results (on page 39).
Attaching the sensor to the side of the battery using the
n
self-adhesive backing also provides good results in most
situations (on page 40).
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 EX 4000.
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.
975-0998-01-01
sensor
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 30 , then the flat washer, lock washer,
and nut. Tighten the terminal nut to a torque of 80 in-lb (9
Nm). A loose connection can cause excessive heating.
Always follow your battery manufacturer's torque
specifications.
Figure 30 BTS Mounted on the Negative Battery Terminal
BTS
Battery cable
neg (-) battery terminal
8. Check to ensure that the sensor and all wires are held
firmly and cannot be moved.
9. Turn the battery switch on again (if you opened it in Step
2.)
10. Route the sensor cable to the Freedom EX 4000 and plug
it into the BTS port. Secure the cable along its length.
To mount the sensor on the battery case:
ELECTRICAL SHOCK AND BURN HAZARD
Do not drill into the battery.
Failure to follow these instructions can result in death,
serious injury, or equipment damage.
Basic Installation Procedures
WARNING
39
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