The Hondata G Sensor is a module containing a two axis accelerometer which plugs into the s200 Interface Box. It allows you to datalog lateral and longitudinal acceleration simultaneously.
· Hondata s200 System
· Datalogging option
· HondaLogger V3
Installation involves inserting the G Sensor module into the Interface Box, mounting the Interface Box then zeroing the G Sensor.
1. Remove the Interface Box from the vehicle.
2. Open the Interface Box by removing the screws from the end plate on the cable end of the box.
3. Remove the circuit board from the Interface Box.
4. Plug the G Sensor module into the Interface Box circuit board, taking care to ensure that the connectors are properly aligned, and the module is inserted fully.
5. Replace the circuit board inside the Interface Box, and replace the end plate.
6. Before re-mounting in the vehicle, test the G Sensor and Calibrate if necessary (see below).
7. Install the Interface Box in the vehicle as flat as possible. It is recommended that the Interface Box is mounted to the vehicle so that it will not move under acceleration, braking and cornering forces. Isolating the Interface Box from the body of the vehicle with rubber is recommended to reduce vibration.
8. Zero the G Sensor (see below).
datalogging, check that accelerating, braking and cornering the vehicle shows
forces in the correct direction (in the G Force tab of HondaLogger). If not,
use the ‘Reverse X Axis’ and ‘Reverse Y Axis’ buttons from the ‘G Sensor’
to switch each axis until the correct direction is shown in HondaLogger.
Before using the G Sensor, it is recommend that you test to unit to ensure correct operation.
1. Using HondaLogger, start datalogging from the Interface Box.
HondaLogger, select the ‘ECU Information…’ menu (or press Ctrl+M). A window should be displayed which shows
details of the Interface Box and G Sensor module. Check that the G Sensor shows that it is present.
3. With the Interface Box un-mounted, check that HondaLogger reads 1 G acceleration when the Interface Box is rotated so that each side points directly downwards. If it does not, then calibrate the Sensor as outlined below.
Zeroing the G Sensor takes into account differences in mounting position so that the G Sensor will read no acceleration when the car is stationary.
1. Place the vehicle on a level surface.
2. In HondaLogger, start datalogging from the Interface Box.
the ‘ECU’ menu, select the ‘Zero G Sensor’ menu option.
the ‘G Force’ page (F7) the G Sensor graph should show that current
acceleration is zero on both axis.
Calibration sets the maximum range for each axis so that the G Sensor can accurately measure acceleration. The static force of gravity is used to calibrate the G Sensor. The G Sensor is supplied calibrated from the factory and normally will not require re-calibration. If you wish to re-calibrate the G Sensor here is the procedure:
1. Un-mount the Interface Box, but leave it connected to the ECU.
2. Switch the vehicle ignition on.
4. Using HondaLogger, start datalogging from the Interface Box.
HondaLogger, open the Settings Form, and select the G Sensor tab.
4. Hold the G Sensor on its side.
5. In HondaLogger, click on the ‘Start Calibration’ button.
6. Slowly rotate the G Sensor at least one full rotation so that each side points directly downwards, with the top of the Interface Box remaining vertical. The easiest way to do this is to hold the Interface Box from above and rotate your wrist.
7. In HondaLogger, click on ‘Stop Calibration’ button.
8. While datalogging, rotate the G Sensor and check that 1 G acceleration is measured in each direction. If not, repeat the calibration process.
9. Re-mount the Interface Box in the vehicle.
10. Zero the G Sensor.
HondaLogger will automatically detect the existence of the G Sensor module and datalog readings from it. If HondaLogger does not datalog the G Sensor, use ‘ECU Info…’ (CTRL+M) to check that HondaLogger has detected the G Sensor.
Since the G Sensor can read static acceleration, it is sensitive to the orientation of the vehicle relative to where the vehicle was when the G Sensor was calibrated, so it is normal for the G Sensor to show non-zero acceleration values when the car is stationary if the vehicle is not on a flat road.
HondaLogger can display the acceleration either on the G Sensor tab as a circle of traction, or as sensors on the Graph tab. The circle of traction graph is updated in real-time while datalogging, as well as when recording and playing back recordings.
It is also possible for HondaLogger to calculate the power and torque output of the engine based on the acceleration, gearing and vehicle weight.
For more information, see the HondaLogger manual.
· Storage temperature range: -20 - 85 ºC
· Operational temperature range: 0 - 70 ºC
· Maximum shock: 500g
· Voltage : 5 V
· Current consumption: 15 mA
· Measurement axis: 2
· Frequency: Static to 10 Hz
· Range: ±2 G each axis
· Resolution: 1 mg
· Peak-peak noise: 4 mg
· Accuracy: 5 mg
· Temperature drift: 0.0035 % / ºC
Information furnished by Hondata is believed to be accurate and reliable. However, no responsibility is assumed by Hondata for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Hondata.
2341 West 205th St
Torrance, CA 90501
World Wide Web Site: http://www.hondata.com
© Hondata, Inc., 2002