Sensors & Software PDP1000, User Manual

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PDP User's Guide PDP Collection Software
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Measurement time ( only available if Collection mode = Stationary ) - the data
parameter to be displayed (e.g. density) is averaged over the set time, after which
data collection is stopped and the file is created. Available options are: 30 s, 60 s
and continuous. If continuous is selected, data is collected until the user presses
Stop. See Figure 4-4.
4.1.2 GPS
The PDP contains an internal GPS and has the option of using an external GPS for
greater positional accuracy when collecting georeferenced data (Figure 4-6).
Figure 4-6: Profile collection showing GPS data
An optional external Topcon GPS can be supplied, which is pre-configured to
seamlessly connect with the PDP. The built in Internal GPS has a stated accuracy
of +/- 10m, while the external Topcon has a stated accuracy of +/- 1m.
If you choose to connect and utilize a 3
rd party GPS, it must meet the following
criteria:
• Able to communicate over RS232 with a standard 9-pin serial output cable.
• Output a NMEA GGA string in ASCII format, at a rate no faster than 20 Hz.
• Support a baud rate of between 4800 and 115200.