The MEL data logger is designed to collect precise time stamped data for extended periods. It is available with a 3-axis 16g accelerometer logger (MEL-x16), a 3-axis 2g accelerometer (MEL-x2), or a high precision barometric pressure logger (MEL-b). The electronics are packaged in a watertight enclosure with a pressure equalization port. Two D-cell batteries power the system for 60 days continuously and data is save to an 8GB microSD memory card. Data files are accessible via USB connectivity or by removing and accessing the microSD card directly (card reader not included).Buy Online
For more details, specifications, and how to use the MEL, please refer to the user manual (.pdf). The user manual includes an example data file and instructions for converting the data and time stamps.
The MEL logger is configured using a simple text file called config.txt located on the microSD card. Below is an example config.txt file used for the MEL-x16:
; set to 25Hz samplerate = 25 ; trigger at 0.1g deadband = 205 ; record 5 seconds of data dwell = 125 ;force a write every hour deadbandtimeout = 3600 ; set file length samplesperfile = 30000 ; LEDs on statusindicators = normal
Data is stored to simple text formatted .csv type files, which are easily imported into any spreadsheet or analysis software (Matlab, Octave, R, etc). Below is a example data file from the MEL-x16:
;Title, http://www.gcdataconcepts.com, x16-1d, ADXL345 ;Version, 1110, Build date, Dec 30 2015, SN:CCDC4016131F31B ;Start_time, 2016-01-04, 10:25:14.000 ;Temperature, -999.00, deg C, Vbat, 1444, mv ;SampleRate, 100,Hz ;Deadband, 0, counts ;DeadbandTimeout, 0,sec ;Headers, time,Ax,Ay,Az 0.003,799,650,-1773 0.013,805,661,-1808 0.023,766,687,-1844 0.033,790,670,-1818 0.042,801,663,-1808 0.052,769,657,-1786 0.062,790,683,-1795 0.072,813,719,-1853 0.081,824,670,-1784