What Is Delivered; Certification; Operation And System Construction; Measurement Principle - Endress+Hauser RIA 261 Manual De Instrucciones

3 Operation and system construction

32

2.2 What is delivered?

- Field display, model to order.
- Operating manual.
- Accessories as ordered.

2.3 Certification

The unit has been manufactured using state-of-the-art
technology and has left the factory in perfect working order.
The unit complies with relevant regulations as well as the EN 61
010 "Safety regulations for measurement, control and
laboratory instrumentation" directives.
This means that the unit described in this operating manual
fulfils the legal requirements laid down in the EU directives. The
manufacturer acknowledges successful testing of the unit by
adding the CE mark to it.
3 Operation and system
construction

3.1 Measurement principle

The field mounted display is directly connected to a 4 to 20 mA
current circuit. The energy required to power the unit is derived
from the current loop. The unit monitors an analogue measured
value and shows this on an easily read LC display. Additionally,
the measured value is also shown in the form of a bargraph.
Increased readability in dark areas is achieved by the addition
of a illuminated display.

3.2 System construction

Micro-controller controlled field mounted display with rear
illuminated numeric and analogue LC display. Display update
is made every second.
The dynamic internal resistor (load) makes sure that the signal
circuit voltage drop is always < 2.5 V.
Digital field display