Safety information:
• Read and understand all instructions in the opera-
tion section of this manual before use.
• Do not substitute components as this may impair
intrinsic safety and invalidate warranty.
• Observe all warnings and instructions marked on
the unit and within this manual.
• Observe site health and safety procedures for
gases being monitored and evacuation proce-
dures.
• Make sure you understand the screen display and
alarm warnings.
• If this product is not working properly, read the
troubleshooting guide or call Crowcon.
• Ensure qualified service personnel change sensors
and operating system.
• Ensure maintenance and calibration are carried
out in accordance with the procedures in the man-
ual.
Instructions specific for use in hazardous areas
The following instructions apply to equipment cov-
ered by certificate numbers:
Tetra 3 = Baseefa 05ATEX0187
Tetra 3 = IECEx BAS 05.0059
The following information covers all relevant points list-
ed in clause 1.0.6 of the EHSR’s of the ATEX directive.
1. The certification marking is as follows:
2. The equipment may be used in zones 1 and 2 with
group IIA, IIB, and IIC flammable gases, tempera-
ture classes and vapours T1, T2, T3 and T4.
3. The equipment is certified for use in ambient tem-
peratures in the range –20°C to +55°C
(-4 to +131 F). The equipment should not be used
outside these ranges.
4. Compliance with the Essential Health and Safety
Requirements has been assured by compliance with
IEC 60079-0, 60079-1,60079-11, EN61779-5, as
certified by Baseefa. Compliance with gas detec-
tion performance standards EN50054, EN50057,
EN61779-1, EN61779-4 and EN50104 and
EN50270 has been certified by Lloyds Register.
5. Repair of this equipment and gas sensor replace-
ment shall be carried out by the manufacturer or
in accordance with the applicable code of prac-
tice.
6. If the equipment is likely to come into contact
with aggressive substances, then it is the responsi-
bility of the user to take suitable precautions that
prevent it from being adversely affected, thus
ensuring that the type of protection is not com-
promised.
7. The rechargeable battery must only be charged in
non-hazardous (safe) areas by connection to the
specified Crowcon charger power supply.
8. The equipment is not certified for use in atmos-
pheres containing more than 21% oxygen.
Area Classifications: -
Zone 1: An area classified as Zone 1 is likely to have
ignitable concentrations of flammable gases,
vapours or liquids present under normal oper-
ating conditions.
Zone 2: An area classified as Zone 2 is not likely to
have ignitable concentrations of flammable
gases, vapours or liquids present under nor-
mal operating conditions.
© Copyright Crowcon Detection Instruments Ltd 2007.
All rights are reserved. No part of the document may be pho-
tocopied, reproduced, or translated to another language with-
out the prior written consent of Crowcon Detection
Instruments Ltd.
Publication number: M07654
Fourth edition: December 2007
Crowcon Detection Instruments Ltd
2 Blacklands Way, Abingdon
OX14 1DY UK
Tel. +44 (0)1235 557700
Fax. +44 (0)1235 557749
www.crowcon.com
Email: sales@crowcon.com
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