Xylem SonTek FlowTracker2 - Section 12. FlowTracker2 File Format; 12.1. FlowTracker2 JSON File

SonTek – a Xylem brand
FlowTracker2 User’s Manual (January 2019)
196
FlowTracker2 File Format Section 12.
12.1. FlowTracker2 JSON File
The FlowTracker2 measurement file was developed on the JSON format. The handheld
and desktop software uses the FlowTracker2 measurement files structure (see Table
4:2) as the primary format for the storage of system information, configuration, raw data,
calculations and post processing. The measurement files with .ft extension created from
the FlowTracker2 handheld can be directly imported into the FlowTracker2 desktop
software for evaluation and post processing if required.
The FlowTracker2 measurement file with .ft extension is essentially a ZIP file that
combines the different JSON files created during the measurement.
Changing the extension from .ft to .zip should not be performed on the original
FlowTracker2 measurement file. It is recommended that if this action is required a
duplicate copy of the measurement file is created. It is expected that this action is only
required by advanced users to extract the data in either a database or 3
rd
party
evaluation software.
The FlowTracker2 measurement file consists of three
different file types given below. The Beam Check and
Point measurement files are placed in sub folders to
separate from the main Data File.
a) Beam Check,
b) Point Measurements
c) Data File
Figure 12:1 - FlowTracker2
Measurement File
JSON file is created for each Beam Check and Point Measurement performed during the
FlowTracker2 measurement and stored in respective sub folders. The number of point
measurement files can be significant depending on the number of point velocity
measurement performed in Discharge or General Mode.
KISTERS developed an import script for the FlowTracker2 measurement file (JSON) for
both Hydstra and WISKI Time Series Data Management Systems. SonTek involved
KISTERS from the initial development stage of the measurement file structure to
ensure that the import of FlowTracker2 data is seaming less.
Further information on the JSON format can be accessed from the JSON website
(www.json.org/).