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1.
INTRODUCTION
The
DAT 420
gas detector is intended for monitoring industrial and commercial confined areas.
DAT 420
is suitable for use in hazardous areas of explosive atmospheres. It operates in associa-
tion with a compatible control unit or with a Programmable Logic Controller (PLC) to provide early
warnings of gas hazard or oxygen deficiency. For further information about the detectable gases or
the list of compatible control units, please contact DALEMANS.
1.1.
Certification
DALEMANS declares that the
DAT 420
gas detector complies with the acceptable variations origi-
nating from the type that has received the EC-Type Examination Certificate number
FTZU 09 ATEX 0074. The measuring function, as defined under Annex II clause 1.5.5. of the
ATEX directive 2014/34/EU, is not matter of this certificate. The said equipment is suitable for use
in explosive atmospheres of hazardous areas, zone 1 and 2. Moreover, this equipment fulfils the
provisions of the following standards:
▪
EN 60079-0
▪
EN 60079-1
▪
EN 60079-31
The label below is affixed to the junction box of the detector. This marking applies to the detector
overall assembly. The marking label affixed to the sensing head applies only
to the sensing head.
If missing, the detector is not certified for use in hazardous areas.
Figure 1: identification and certification label
Approval Code
Definition (see “Directive 2014/34/EU” for further details)
II
Non-mining electrical equipment group for potentially explosive atmospheres.
2G
Category 2 equipment intended for use in areas where GAS explosive atmospheres are likely to
occur (zone 1).
Ex db
Protection by flameproof enclosure “d” with a “high” level of protection (EPL Gb).
IIC
Equipment group II subdivision according to the nature of the explosive gas atmosphere (me-
thane, propane, ethylene, hydrogen, acetylene).
T6
Temperature class according to the maximum surface temperature of the equipment in explosive
GAS atmosphere (T6=85 °C).
Gb
Gas Equipment Protection Level
2D
Category 2 equipment intended for use in areas where DUST explosive atmospheres are likely to
occur (zone 21).
Ex tb
Dust
ignition protection by enclosure “t” with a “high” level of protection (EPL Db).
IIIC
Equipment group III subdivision for conductive dust explosive atmospheres (combustible dust with
electrical resistivity equal to or less than 10
3
ohm.m).
T85 °C
Maximum surface temperature of the equipment for dust explosive atmospheres.
Db
Dust Equipment Protection Level
Tamb
Ambient temperature range according which the temperature class (T6) and the
maximum surface temperature (T85 °C) have been rated.
Detector model
Operating temperature
d'utilisation
Measurement range
Target gas
Notified Body identification code
Certificate nr
Approval codes
Serial nr/year of production
Remicourt • Belgium
