MEDC FB11 User Manual

Page 5

Unscrew and remove the two M3 nuts and washers holding the bulb assembly to the cover pillars. Keep in a safe
accessible location.
Lift the bulb assembly away from the support pillars, thus exposing the ﬁlament bulb. Remove the old bulb by care-
fully pushing it down in the holder while turning it anti-clockwise. The replacement bulb can now be ﬁtted. Care
must be taken to ensure that the replacement bulb is the same wattage and ﬁtting type (Ba15d) as the original.
Replace the bulb assembly onto the support pillars and secure using the two off M3 nuts and washers. Ensure the
retaining strap is ﬁtted to one of the electronics assembly mounting pillars during re-assembly.
Carefully replace the cover assembly back onto the base, avoiding damage to the mating surfaces. Replace
the 6 off M5 screws (4.0mm A/F hexagon key) into the holes in the cover assembly and tighten evenly. Ensure
the O-ring is seated correctly on the cover during re-assembly. Ensure the required maximum gap of 0.2mm is
maintained between the cover and the base once assembled

5.0 CERTIFICATION/APPROVALS
IECEx units

Certiﬁed to IEC60079-0, IEC60079-1 and IEC60079-31

Ex d unit (IEC certiﬁcation No. IECEx BAS 10.0101)

Ex d IIB Tx (Tamb.) Gb
Ex tb IIIC Tx (Tamb.) Db IP66/IP67

Gas T-rating (Tx)

Dust T-rating (Tx)

Ambient temp range (Tamb.)

T110°C

(-55°C to +70°C)

T85°C

(-55°C to +55°C)

T70°C

(-55°C to +40°C)

The IECEx certiﬁcate and product label carry the IECEx equipment protection level marking

Gb
Db

Where Gb signiﬁes suitability for use in a Zone 1 surface industries area in the presence of gas.
Where Db signiﬁes suitability for use in a Zone 21 surface industries area in the presence of dust.

ATEX units

Certiﬁed to EN60079-0, EN60079-1 and EN60079-31

Ex d unit (ATEX certiﬁcation No. BAS99ATEX2195)

Ex d IIB Tx (Tamb.) Gb