INFICON Extrima Ex-certified Hydrogen Leak Detector - Manual (Page 47)

47
EN
INFICON - Operating Instructions EXTRIMA
Sira Certification Service
Rake Lane, Eccleston, Chester, CH4 9JN, England
Tel:
+44 (0) 1244 670900
Fax: +44 (0) 1244 681330
Email: [email protected]
Web: www.siracertification.com
C E R T I F I C A T I O N
SCHEDULE
EC TYPE-EXAMINATION CERTIFICATE Sira 07ATEX2117X
Issue 5
This certificate and its schedules may only be
reproduced in its entirety and without change.
Page 2 of 4
Form 9400 Issue1
13 DESCRIPTION OF EQUIPMENT
The Extrima Hydrogen Leak Detector is a portable device used to detect hydrogen leaks and is powered
by a rechargeable Lithium ion battery. The equipment has a main housing (which is referred to as the
detector), interconnected by a pluggable cable to a PX50 series probe unit. The interconnecting cable
is fitted with a Lemo connector at each end enabling it to be removed from both the probe and
detector.
The detector housing, is made from extruded aluminium, which is anodized and protected by
conductive rubber face seals fitted to the front and rear panels. The side panels and corners of the
enclosure are fitted with protective rubber ribs. The front and rear panels are secured to the main
detector housing by four fasteners.
The front panel is fitted with the following; glass LCD, piezo speaker, four rubber pushbuttons, two
LEDs and a Lemo connector for connecting to the probe. On the outside, the back panel has a socket
for connecting to the battery charger/barcode reader and a Gortex seal. The battery charger has the
following maximum parameters, 12.6V, 770 mA.
Internally the equipment comprises a potted lithium battery pack fitted to the rear of the back panel,
and the following PCBs:
•
Main
• Keyboard
• Backlight
• LCD
Externally, the probe comprises a conductive plastic enclosure with a single switch and two LEDs. The
nozzle, which varies in length and type, is fitted into the end of the probe. A hydrogen sensor fits
inside the nozzle and plugs into a connector that is wired back to the probe electronics. The probe is
fully encapsulated, however, the switch, two LEDs and the hydrogen sensor are located ouside of the
encapsulation.
Internally, the probe comprises a single circuit board. The sensor wires are fitted at one end of the
board and the Lemo connector at the other.
The Extrima® Hydrogen Leak Detector has an Ingress Protection rating of IP67 (1 m, for 30 minutes).
Variation 1 - This variation introduced the following changes:
i.
To prolong the battery life, the probe power generation and protection circuit on the MAIN PCB in
the Detector Unit has been redesigned. The circuit contains voltage enhancement and controlled
semiconductor voltage shunts. These changes give increased output parameters to the probe.
ii. PX50x Series Probe Assembly now uses a housing made from an alternative plastic material and
may incorporate a hydrogen sensor that is not component approved. The circuit has been modified
to provide increased power to the sensor to improve its sensitivity.
iii. The applicant’s name was changed from Adixen Sensistor AB to that currently shown.