Gulf Coast Data Concepts X16-1C Manual Download Page 3

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USB Accelerometer Model X16-1C

Figure 2: Starting the X16-1C

3.2

Electrical

3.2.1

Sensor

Table 1: Accelerometer Sensor Characteristics

Parameter

Condition

Min

Typical

Max

Units

Acceleration range

±16.0

Resolution

0.001

g/count

Linearity

X, Y, Z axis

±1

%FS

Zero-g Offset Level

Accuracy

X, Y axis

-150

+150

Z axis

-250

+250

Inter-Axis Alignment Error

±0.1

Degrees

Cross-Axis Sensitivity

±1

January 2012 Rev New

3 of 14

www.gcdataconcepts.com

Summary of Contents for X16-1C

Page 1: ...is applicable to Continuous time stamped shock and motion monitoring of critical freight Monitoring human motor activity or actigraphy such as exercise intensity or sleeping disorders Automotive performance monitoring Educational purposes 3 Description The USB Accelerometer X16 1C uses a low noise digital accelerometer sensor precise time stamped data logging microSD memory storage real time data ...

Page 2: ...se the combination of deadband and dwell to captured triggered events see section 3 2 4 3 Step 4 If necessary initialize the RTC clock by creating a time txt file see section 3 2 6 Step 5 Unplug the X16 1C from the USB port and firmly attach the system to the target object Depending on the g force intensity expected tape tie wraps pipe clamps or glue are suitable methods of attachment The 0 75 6 3...

Page 3: ... Characteristics Parameter Condition Min Typical Max Units Acceleration range 16 0 g Resolution 0 001 g count Linearity X Y Z axis 1 FS Zero g Offset Level Accuracy X Y axis 150 150 mg Z axis 250 250 mg Inter Axis Alignment Error 0 1 Degrees Cross Axis Sensitivity 1 January 2012 Rev New 3 of 14 www gcdataconcepts com ...

Page 4: ...s the brightness of the status indicators see section 3 2 4 11 3 2 3 Battery 3 2 3 1 Main Battery The X16 1C is powered by a single AA sized battery Typical operation times using an alkaline battery range from 3 to 7 days depending on system configuration battery quality and microSD card type The RTC continues to operate from the battery when the device is off The RTC should be reinitialized if th...

Page 5: ...35 3 Specifies the period in seconds when a sample is recorded regardless of the deadband setting This feature ensures periodic data is recorded during very long periods of inactivity dwell An integer between 0 and 65535 1 The number of samples recorded after a deadband threshold triggered event microres Off The presence of this tag sets the device to record time stamps with 0 1ms effective precis...

Page 6: ...nt threshold limit when used in conjunction with the dwell feature Figure 4 Graphical Illustration of the Deadband Feature 3 2 4 2 deadbandtimeout deadbandtimeout defines the period in seconds when a sample is recorded by the device regardless of the deadband setting This feature ensures periodic data is recorded during extended periods of inactivity A valid setting for the deadbandtimeout is an i...

Page 7: ...ing and terminating the data recording process Data recording is automatically started upon disconnect from a computer USB port if the tag word rebootondisconnect is included in the configuration file Note that the system must first be turned on and the configuration file read before the rebootondisconnect option is implemented by the system Subsequent disconnects will then cause a reboot and imme...

Page 8: ...efined using the starttime and stoptime tags The times must be in DD MM HH 24 hr format with the three entries separated by a space Entries marked with operate as a wild card The X16 1C continues to record after the start time unless defined otherwise by the stoptime tag Note that the configuration option does not include the month Example timing configurations Example 1 On the 15th day start reco...

Page 9: ... external 5v USB battery pack 3 2 4 13 Example Configuration Files Example A The following configuration records data constantly at 25 hertz The device will boot and begin logging data once removed from a computer USB port Each data file is 30 000 lines long or about 25 minutes Figure 6 Configuration File Example A Example B Setting the deadband to 50 counts causes the device to record only change...

Page 10: ...the header The raw sensor data format is signed digital counts The raw counts are converted to g by dividing the value by 1024 Table 3 lists the valid header tags although not all tags may occur in the header The X16 1C creates a new data file when the system is booted or when the maximum number of data lines is reached in the previous data file A system boot condition occurs when the on off butto...

Page 11: ...s indicates low for the X16 1C HEADERS The names of each column of data in the file SAMPLERATE Rate at which data is recorded to the microSD card START_TIME The current time when the data file was created TEMPERATURE Temperature of sensor in C when data file was created TITLE The name of the USB Accelerometer X16 1C unit VERSION The version control information of the USB Accelerometer firmware Fig...

Page 12: ...equire special communication drivers so it can be implemented using any text editor Direct initialization of the RTC is possible but requires specific device drivers from Gulf Coast Data Concepts 3 2 7 Memory Card The X16 1C stores data to a removable 2GB microSD flash memory card The device operates using FAT16 file structure which limits the maximum microSD card capacity to 2GB The config txt an...

Page 13: ...a 0 75 long 6 32 screw and nut Longer screw lengths can facilitate attachment of the X16 1C to other structures A slip on cap protects the USB connector The X16 1C weighs 2oz 55g with an alkaline battery 3 3 1 Dimensions Figure 10 Enclosure Dimensions 3 3 2 Assembly Figure 11 Exploded View of USB Accelerometer X16 1C January 2012 Rev New 13 of 14 www gcdataconcepts com 1 01 1 04 4 10 0 75 Length 6...

Page 14: ...lows easy visual presentation of the data copy paste export of data segments as well as configuration file and time file creation utilities XLR8R is included on the microSD card of each X16 1C unit or can be downloaded from the website at www gcdataconcepts com For data analysis Gulf Coast Data Concepts recommends using a commercial or open source mathematics package such as MatLab Microsoft Excel...

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