Тема: How to connect Eurosens flow meter in your system (display, tracker)

This topic is about electric connection, signal curves and interfaces.


Flow consumption signal from Direct P, Direct PN and Delta PN is just usual pulses. You need to count pulses right. Weight of pulse (in milliliters) is shown in device passport.
For Eurosens Direct P - each flow meter has own weight of pulse, according to manufacturer's benchmart  after assembly.

For Eurosens Direct PN and Delta PN it is constant:
for 100 serie - 0.005 liter
for 250 serie - 0.01 liter
for 500 serie - 0.02 liter


Some cheap GPS trackers can't perform with flow meters it well because don't have internal timer and rely only for GPS receiver for time information. That means that if no GPS signal - pulses can be not registered and measurement will be wrong.


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2 (2015-08-11 17:03:11 отредактировано Mechatronica)

Re: How to connect Eurosens flow meter in your system (display, tracker)

About shape of pulse output


Direct P flow meter (simple scheme with reed switch).

Direct P meter pulse shape

Vbat - supply voltage (usually 12 or 24V)

Uhigh=0.9*Vbat
Ulow=0.7Volt

timing data:
table direct P


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3

Re: How to connect Eurosens flow meter in your system (display, tracker)

Direct PN flow meter

Direct PN pulse

Vbat - supply voltage (usually 12 or 24V)
Uhigh=0.6*Vbat
Ulow=1.4Volt for Direct PN100, PN250, PN500
Ulow=0.7Volt for Delta PN100, PN250, PN500

table PN

4

Re: How to connect Eurosens flow meter in your system (display, tracker)

This data is enough for you to check compatibility of pulse flowmeter output before connection.

Flow meters with serial interface (RS232, RS485) must be supported by external device (GPS tracker). Delta RS protocol must be supported.