Description; Description Of Structure And Function; Technical Data - ABB FXL5000 Manuel De Mise En Service, D'opération Et D'entretien

2

Description

2.1
The flowmeter (Miniflow) can be used to measure fluids with a minimum conductivity of 50 μS/cm. (Also
refer to chapter 1.1.4 "Permissible fluids")
According to Faraday's law of electromagnetic induction, voltage is created which is linear and propor-
tional to the mean speed of flow. This voltage is recorded by two electrodes which are in contact with the
measuring agent.
The various electrical signals for further processing are available at the converter output (e.g. pulse pro-
portional to flow, 20 mA current output, min./max. contact output for flow monitoring).
The electrical connection is provided by means of plugs.
2.2
Opto-electronic coupler as
a) Passive pulse output
or
b) Passive contact output
When using the display version, the function of the optocoupler output can be selected from the menu
on-site, e.g. min./max. alarm etc. The optocoupler output can either adopt the function of a "pulse output"
or the function of a "contact output". When using the version without a display, the function of the opto-
coupler output can be set to "pulse output" or "inlet/outlet signalling". Factory presetting is "pulse output"
Current output
can be set 0/4 to 20 mA; load ≤ 600 Ohm
Contact input
The contact is considered as actuated at an external voltage of between 16 V ≤ U ≤ 30 V. It is not con-
sidered as actuated at a voltage of between 0 V ≤ U ≤ 2 V. The internal resistance of the contact input is:
R
Failure signal
The contact output (optocoupler) can be configured as a system alarm. Optocoupler data: refer to pulse
output
Load
Max. load of current output: ≤ 600 Ohm
Low flow out off
The low flow volume can be set. (Display version is needed for this function).
Factory presetting: 1 % (fixed in version without display)
GB 8 FXL5000 (Miniflow)

Description of structure and function

Technical data

(Optocoupler data:)
16 V ≤ U ≤ 30 V; 0 V ≤ U
CEH
0 mA ≤ I ≤ 0.2 mA ; 2 mA ≤ I
CEH
fmax = 20 pulses/sec;
Pulse width min. 20 ms; max. 2550 ms
With the display version, the function of the output
can be set, e.g. inlet/outlet signalling, min./ max.
contact, system alarm, opto-electronic coupler data: refer to
pulse output
= 2 kOhm.
i
≤ 2 V;
CEL
≤ 220 mA
CEL
2 Description
D184B112U04