Instructions

2
Using the Product
Connect the sensor following the steps in the Getting Started section of this user
manual.
Channels
Go Direct Force and Acceleration has seven measurement channels. The channel
names are
l Force
l X-axis acceleration
l Y-axis acceleration
l Z-axis acceleration
l X-axis gyro
l Y-axis gyro
l Z-axis gyro
Force
The default channel that is active when the sensor is connected is Force. The
force channel measures pushes and pulls along the main axis of the sensor body.
Use the hook attachment for pulling and the bumper attachment for pushing.
Pulls are registered as positive forces and pushes are registered as negative
forces, unless sensor readings are reversed in Graphical Analysis 4.
Acceleration
There are three acceleration channels, measured by a single chip, which is
located under the 3-axis icon on the label. The icon shows the positive direction
for each axis, with the x-direction of acceleration parallel to the pulling force on
the force sensor and the z-direction straight up through the label. Each direction
of acceleration can be measured separately.
If you choose to activate all three acceleration channels at once, you can create
a calculated column for the total acceleration magnitude.
Gyroscope
Use the gyroscope channels to measure the rotation rate of the unit. Measured
values are positive when the rotation is counter-clockwise relative to the axis
directions indicated by the 3-axis icon on the label. For example, when placed
label upward on a turntable rotating clockwise, the x- and y- gyroscopes will
read close to zero and the z- gyroscope will show a negative reading.
If you choose to activate all three gyroscope channels at once, you can create a
calculated column for the total magnitude of angular velocity.
Calibrating the Sensor
Force
This sensor is factory calibrated. If you would like to calibrate the force sensor
yourself, use a two-point calibration: no force applied and a known force
applied. It is easiest to simply hang a mass from the hook. We recommend a 1
kg mass or greater. Do not exceed the maximum of 50 N during calibration.
Acceleration
This sensor is factory calibrated.
Charging
Orange LED next to battery icon is solid while
sensor is charging.
Fully charged
Green LED next to battery icon solid when
sensor is fully charged.
Powering the Sensor
Turning on the sensor
Press button once. Red LED indicator next to
Bluetooth icon flashes when unit is on.
Putting the sensor in sleep
mode
Press and hold button for more than three
seconds to put into sleep mode. Red LED
indicator stops flashing when sleeping.
Connecting the Sensor
See the following link for up-to-date connection information:
www.vernier.com/start/gdx-for
Connecting via Bluetooth
Ready to connect Red LED next to Bluetooth icon flashes when
sensor is awake and ready to connect.
Connected Green LED next to Bluetooth icon flashes when
sensor is connected via Bluetooth.
Connecting via USB
Connected and charging Orange LED next to battery icon is solid when
sensor is connected to Graphical Analysis via
USB and the unit is charging. LED next to
Bluetooth icon is off.
Connected, fully charged Green LED next to battery icon is solid when
sensor is connect to Graphical Analysis via USB
and fully charged. LED next to Bluetooth icon is
off.
Charging via USB,
connected via Bluetooth
Orange LED next to battery icon is solid when
sensor is connected to charger via USB and the
unit is charging. Green LED next to Bluetooth
icon flashes when sensor is connected via
Bluetooth.
Identifying the Sensor
When two or more sensors are connected, the sensors can be identified by
tapping or clicking Identify in Sensor Information.