Bedienungsanleitung Powertap Joule GPS (Seite 22 von 66) (Englisch)

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Joule GPS User Guide page 22

CHAPTER 4: SENSORS

CALIBRATION, PowerBeam

Once you are paired with the PowerBeam Resistance Unit (RU) there are two options available to calibrate the device: Rolldown

calibration or Manual Calibration. There is also an option to reset the most recent calibration back to the factory default values.

RU Sensor

Activate Sensor

Start Pairing

Name

RU1

Sensor ID

130

Delete Sensor

Calibrate

Back to Bike

9:34A

On or Off. Typically, always On. The Auto Zero

function follows the same steps outlined for

Manual Zero but does it continually during the

ride, whenever the bike is coasting for 4 or

more seconds. If your bike is a ﬁxed-geared

or track bicycle you may consider turning

Auto Zero off.

Calibrating or “zeroing the torque” refers to the

process of resetting the Torque Offset value of

the physical torque tube (where the internal

strain guages actually measure wheel torque).

1) Make sure the power meter is awake and

communicating with the Joule. Make sure

the bike is sitting still, no feet on pedals, no

tension in chain.

2) Select Manual Zero on Power Sensor screen.

The Calbration screen will appear. Torque

RAW should be 0. The last saved Torque

Offset is displayed. The value is typically

500-524 in-lbs.

3) Select Manual Zero on Calibration Screen.

The Torque Offset value will update with the

torque tube calibration value, given the

current environmental conditions.

RU Calibration

Roll Down

Manual

Reset to Default

Back to RU Sensor

9:34A

RU Roll Down

Back to RU Calibration

Pedal to

18-20 mph

9:34A

mph

0.0 2:00

REMAIN

RU Manual

Back to RU Calibration

Use +/- to match

RU Watts to Power

9:34A

RU WATTS

210 230

POWER

- +

Roll Down

Manual

Reset

The RU Roll Down calibration screen will ﬂash the “Pedal to...” message until the wheel speed is in the speciﬁed range.

Once in range, the clock will begin to count down. Continue pedaling, keeping the speed in range for entire countdown.

This will allow the tire temperature and pressure to stabilize. Once the timer goes to zero. Stop pedaling and let the

wheel spin down.

Option: Select Manual calibration when another power meter is present on the bike and paired to the Joule GPS. Begin

pedaling to see power values from both the RU and the power meter.

Spend 2 minutes pedaling to warm up the tire after clamping against the roller. The vertical bar on the graphic shows

the current calibration within the acceptable range. Use the +[PLUS] and -[MINUS] buttons to increase/decrease the value

of the RU Watts until matching Power Watts. Pedal at a consistent power while calibrating. Be sure to give the RU time to

adjust with each increase/decrease.

Reset to Default will reset all values to the factory default calibration.

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