© 2021 VPInstruments | MAN-VP-VP38-EN | Revision: 2100 | Date: 25-01-2021
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7
Connectivity & communication
The VPFlowScope In-line 3/8" flow meter features two outputs, analog and RS485, which make it
possible to connect to VPVision, a central data acquisition / building management system.
For the analog output there is an option for 4..20 mA or pulse. Which mode is selected affects how
values analog min & max are interpreted.
7.1
LEDS
There are 2 LED's available on the flow meter that indicates the status of the instrument. Various
colors and patterns are available.
Color
Patterns
Descriptions
Green
Blinking at 2 seconds
interval
Initializing during start up
Green
On
Device is on and started up
Orange
Blinking fast
Modbus communication
7.2
4 .. 20 mA output
The 4..20 mA output can be used to connect to VPVision, a central data acquisition / building
management system, a multi-meter or any 4..20 mA based system. The 4..20 mA output is an
active current loop.
There is one 4..20 mA output available. This output can be assigned to one of the measurement
units. The factory default is ln/min.
Scaling is done by setting analog min & analog max using a modbus master tool. Analog min & max
are the numbers represented by 4 mA and 20 mA. The factory default is analog min on 0, analog
max on 50, making 4 mA represent 0 ln/min and 20 mA represent 50 ln/min. Scaling is linear.
Refer to the modbus table in
