Spectrex 40/40L-LB UV/IR Flame Detector Series - Manual (Page 13)

Overview 1
1 Introduction
➣ In this chapter…
Overview page 1
Model and Types page 2
Features and Benefits page 4
Principles of Operation page 4
Performance Considerations page 8
Internal Detector Tests page 15
1.1 Overview
There are two versions of the 40/40 Series UV/IR Flame Detectors:
 Model 40/40L (and LB) provides a combination of UV and IR sensors,
where the IR sensor operates at a wavelength of 2.5-3.0 µm, and can
detect hydrocarbon-based fuel and gas fires, hydroxyl and hydrogen
fires, as well as metal and inorganic fires.
 Model 40/40L4 (and L4B) is identical to the 40/40L except that the IR
sensor works at a wavelength of 4.5 µm and is only suitable for
hydrocarbon-based fires.
The Built in Test (BIT) feature is only included in models 40/40LB and
40/40L4B.
All 40/40 series detectors include a heated optical window for improved
performance in icing, snow and condensation conditions.
Detection performance can be easily adapted to all environments,
applications and requirements, by changing the detector’s configuration
parameters. Adjusting these parameters, as well and performing other
maintenance and monitoring tasks, is possible by means of RS485-based
Modbus communication or HART communication (in models with 0-20mA
output).
The detector enclosure is ATEX certified Exd flameproof with an integral,
segregated, rear, Exe terminal compartment (avoiding exposure of the
sensors and electronics to surrounding environment). Hence the combined
approval:
Ex II 2 G D
Ex de IIC T5 Ta -55°C to +75°C
Ex tD A21 IP66/X7 T95°C
or
Ex de IIC T4 Ta -55°C to +85°C
Ex tD A21 IP66/X7 T105°C