5
Each type of
Xgard
detector is identified by a label fitted on the junction
box body. Please quote the ‘model number’, ‘gas range’ and ‘sensor
type’ when contacting Crowcon for advice or spares.
This manual covers all versions of
Xgard
, care should be taken to ensure
that the correct section is referenced according to the type of detector
used. The
Xgard
detector type is detailed on the product label. The Xgard
range is as shown:
Type 1: Intrinsically safe toxic and oxygen gas detector
Type 2: Flameproof toxic and oxygen gas detector
Type 3: Flameproof flammable gas detector
Type 4: Flameproof high temperature flammable gas detector
Type 5: Flameproof flammable gas detector with 420mA output
Type 6: Flameproof thermal conductivity type gas detector
Product description
Xgard
comprises of a universal assembly to accommodate the full range
of toxic, flammable and oxygen gas sensors. The assembly comprises
five main parts; the junction box, junction box lid, amplifier/terminal PCB,
sensor PCB and sensor retainer. These are shown in exploded form in
Diagram 3.
A cover is fitted over the amplifier PCB to provide protection when the
junction box is opened. This cover is designed to allow access to all cable
terminals, test points and potentiometers without the need for removal.
The junction box is available in three versions: Glassfilled Nylon for
Xgard Type 1; Corrosionresistant aluminium for all Types; or 316
Stainless Steel for all Types. The junction box is supplied with 1 x M20,
1
/
2
" or
3
/
4
"NPT cable gland entry, on the right hand side for customer use.
The junction box is suitable for fixing on the wall or ceiling using M6
fixings. Cable gland adaptors are available if required (see Spare parts
and accessories section).
Overview
