PowerTap Pro - Manual (Page 29)

29
Figure 11: Computer
battery replacement
Figure 12: Hub Battery replacement
Technical Specifications
Accuracy
Signal Transmission
Interval Data Storage
Interval Display
Operational Temperature
Battery Life (Hub)
Battery Life (Computer)
Battery Type: Hub
Battery Type: Computer
Freehub fixing bolt torque
+/- 1.5%
Digital RF
unlimited
9 intervals
0 O to 40 O C
1,000 hours approx.
100 hours approx.
N-Type, 1.5 volt/ANSI 910/IEC LR1
CR2032/ANSI 5004LC
400 - 450 inch-lbs
Range of Measurement
Power
Torque
Speed
Distance
Trip Time
Cadence
Total Energy
Odometer
Heart Rate
0 - 1999 watts
0 - 1999 inch-lbs
2 - 59 mph
3 - 95 kph
0.00.00 - 999:59
40 - 140 RPM
0 - 99999 kJoules
0 - 99999 mi or km
0 - 255 BPM
bolts. Insert new batteries and verify that the hub is
working properly by spinning the axle while holding
near the receiver before replacing the cover. Note:
The batteries may fall out if you spin it without the
cover on. The transmission icon should illuminate.
Replace the cover and make sure the bolts are tight
(7 turns max.) and an even seal is formed around
the cover. Do not over tighten the cover bolts as this
will damage the O-rings under the bolt heads.(See
figure 12) Apply a light coating of synthetic grease
to the O-rings to ease cover installation and extend
O-ring life
Warning: Do not remove any of the four bolts
underneath the batteries. This will destroy the hub
and will void the warranty.
MAINTENANCE & SPECIFICATIONS
O-Rings
There are four user-serviceable O-Rings that
protect the Powertap electronics from the ele-
ments:
One O-Ring under each cover bolt and two O-
Rings under the hub cover. Properly inspecting
and caring for these O-Rings will ensure years
of trouble free use. Follow the guidelines below:
1. Verify that both O-Rings are properly installed
before installing the cover.
(See illustrations on page 34)
2. Inspect all O-Rings every time you change
the batteries in the hub. Replace them if O-
Rings are torn, cracked or excessively dry. If
necessary, contact Graber Products for an O-
Ring replacement kit.
3. Lubricate the large O-Ring with synthetic
grease to ease installation of the hub cover.