Dwyer UFC - Manual (Page 8)

1: General Description
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separate case and includes the type 'D' transducers together with ratchet straps and holders for attaching
the transducers to the pipe.
1.4 UFC Instrument
The UFC is a microprocessor controlled instrument operated through a menu system using an inbuilt LCD display
and keypad. It can be used to display the instantaneous fluid flow rate or velocity, together with totalized volumes.
The instrument also provides an isolated current output, or variable pulse output, that is proportional to the
measured flow rate and can be scaled to suit a particular flow range. Two isolated alarm outputs are provided
which can be configured in a number of ways. For example, to operate when the flow rate exceeds a specified
maximum or minimum value.
Figure 1.3 Instrument details
1.4.1 Connections
Transducer connections
The transducers are connected to two coaxial sockets located on the bottom left-hand of the instrument. The silk-
screen above these connectors show a red and blue triangle and a direction of flow symbol. For a positive flow
reading, it is important that the upstream transducer is connected to the RED socket and the downstream
transducer to the BLUE one. It is safe to connect or disconnect these cables while the instrument is switched on.
4 to 20 mA, ‘Pulse’, and Alarm I/O connections
The 4 to 20 mA, ‘pulse’, and alarm I/O cables, enter the bottom of the instrument via two cable glands and
connected internally to a terminal block. Full details of the terminal connections are provided in Chapter 2
(Installation).
Power supply
Two cable glands located on the bottom right-hand side of the instrument are available for the power supply
cable. Two sizes of glands are provided to accept cables of different diameters.
Keypad
LCD Display
Coaxial cables to transducers
Cable glands for
Small & Large Glands
for power connection
Alarms & I/O connections
Blue = Downstream
Red = Upstream
USB Connector
(for memory key)