Notes on Approval
1
Marking
1.1
Marking on instrument label
1 Ex ib IIC T4/T3 X
PB Ex ib I X
1)
Serial No.
1.2
Marking inside battery compartment
o
C ≤ Ta ≤ +50
Temperature Class T4, –20
if used with alkaline batteries Energizer No. E91 or Energizer
No. EN91 (industrial) or Varta Type 4106 (power one) or Varta
Type 4006
o
C ≤ Ta ≤ +40
Temperature Class T3, –20
if used with NiMH batteries GP 180AAHC (1800 mAh)
__________________
1) The year of manufacture is indicated by the third letter in the serial num-
ber:
T = 2003, U = 2004, W = 2005, X = 2006, Y = 2007, Z = 2008, A = 2009,
B = 2010, C = 2011, etc.
Example: Serial No. ARUH-0054: the third letter is U, which means that
the unit was manufactured in 2004.
46
2
Intended Operating Area and Operating Condi-
tions
Hazardous Areas classified by Zones
The device is intended to be used in hazardous areas or mines
susceptible to firedamp classified zone 1 or zone 2, within a
temperature range of –20
sion groups IIA, IIB or IIC and temperature class T3 or T4
(depending on batteries) may be present.
If used in mines, the device is only to be used in areas known
to have a low risk of mechanical impact.
o
C
o
C
3
Use only approved batteries. See marking on instrument pack
for approved batteries an related Temperature Code.
o
o
C ... +50
C, where gases of explo-
4
The following standards apply:
Instructions for Safety
WARNING
Do not change batteries in hazardous locations, risk of explo-
sion.
To reduce the risk of explosion, do not mix new batteries with
used batteries, or mix batteries of different type or manufac-
turer.
Remove batteries before servicing.
Remove instrument before opening and changing batteries.
Substitution of components may impair Intrinsic Safety.
CAUTION
Not tested in oxygen enriched atmospheres
(>21% O
).
2
List of standards
IEC 60079-0:2011
IEC 60079-11:2011
EN 60079-0:2012 + A11:2013
EN 60079-11:2012
UL 60079-0:2013
UL 60079-11:2013