Using the SAS-1 as a Count Station And Converting Archive Files to PRN Files 02 August 2005 R S S SmarTek Systems R 410-315-9727 gpieper@smarteksys.com www.smarteksys.
The SAS-1 as a Count Station The SAS-1 has the capability to archive traffic flow measurements for five lanes for up to several weeks depending on the size of the installed non-volatile memory ( 1 Mbit, 2 Mbit, or 4 Mbit) and the selected update period (5, 10, 15, 30, or 60 minutes). The SAS-1 continually updates the archive data independent of it's default mode of operation.
2) To open an existing archive header file (.hhx), click the File/Open Archive Header File menu item. Select and open the desired file using the standard Windows Open File Dialog Window. 3) Edit each parameter by either clicking in the upper/lower part of the value field or typing in the text fields.
Collecting the Traffic Data The SAS-1 will collect traffic flow data for all 5 lanes and update the archive as specified by the Update Period parameter in the Archive Header File (5, 10, 15, 20, 30, or 60 min). After sending a header file to the SAS-1 or setting the date and time in the SAS-1, data archiving begins after the next full data write period. For example, let the archive period be set at 15 minutes and the Set Date and Time command be sent to the SAS-1 at 1:01:55 PM.
Converting the Archive Data from the SAS-1 to Another Format Note: When converting to a PRN Volume file, an associated PRN File Header (.hdr) is required. The associated header (.hdr) files must be prepared in advance and located in the SAS Monitor \Arch_Data\ sub-folder. See page 6 for instructions on PRN File Header set up. 1) To convert each SAS Archive Data file (.ahx) to a Spread Sheet Ready File (.atx) and PRN files, click the Archive/Decode SAS Archive menu item.
Using the PRN Daily Volume File Header Editor 1) To convert each SAS Archive Data File (.ahx) to PRN files, associated header files (.hdr) must be present in the same folder as the SAS Archive Data File (.ahx) to be converted. Each PRN Volume File Header (.hdr) must be named to match the name specified in the SAS Archive Data File Header (sent to and stored in the SAS-1 as previously described). 2) Open the PRN Daily Volume File Header Editor. The editor opens with all fields filled in with default values.
