‘Wolflite’ H-251 Rechargeable Safety Handlamp Range
Operation & Maintenance Instructions
Certification
H-251E
EEx e ib IIC T4
Certificate: BASEEFA Ex 843292
–
H-251 Mk1 & Mk2
EEx e s II T3
Certificate: BASEEFA Ex 81142
Certificate: 86/00097
Use of Wolflite Handlamps in Hazardous Areas
•
The
H-251E
Handlamp is certified for use in potentially explosive
gases, vapours
and
mists
. Applicable standards: EN50014:1977,
EN50019:1977, EN50020:1977.
•
The
H-251 Mk1/Mk2
Handlamps are certified for use in potentially explosive gases and vapours. Applicable standards: EN50014:1977,
EN50019:1977, SFA 3009:1972.
•
Ingress protection level for
H-251E
and
H-251 Mk1
: IP66, to EN60529:1992 for
H-251 Mk2
: IP54 to EN60529:1992.
• Users are advised to consult BS 5345: Part 1:1989 ‘Code of Practice for the Selection, Installation and Maintenance of Electrical Apparatus for
use in Potentially Explosive Atmospheres’ or National equivalent.
• The lamp must not be opened or fitted with replacement parts in a hazardous area. Lamp chargers must be kept and operated in non
hazardous areas and in clean and dry conditions; a damaged lamp should be carefully examined for its continued safety. If in doubt, it should
be withdrawn from use and returned to the manufacturer for repair.
• The ‘Wolflite’ Handlamp may constitute a static hazard and should be cleaned only with a damp cloth.
• Heavily soiled lamps must not be immersed in water or exposed to high pressure water jets for cleaning.
• Maintenance and repair must be carried out by a competent technician/electrician familiar with Certified Electrical Apparatus and in accordance
with these maintenance instructions, using factory supplied spare parts only.
•
Handlamp operating ambient in Hazardous Areas:
-20°C to +40°C
Before Use
Charge battery before first use. To prevent accidental discharge of the battery in transit, the switch is locked in the OFF position.
To Lock/Unlock the Lamp (H-251 Mk1 & Mk2 only)
The stainless steel lock screw in front of the handle interlocks with the operating switch. Screw anti-clockwise to lock the lamp enclosure and
release the operating switch. The lock key provided must be kept in a non-hazardous area.
WARNING: The Lock Screw bush can be dislodged if overtightened. Switch ‘OFF’ before screwing the Lock Screw down.
To Operate and Dismantle the Switch
The switch operates transversely, as indicated on the approval label. It consists of a magnet, a plastic housing and a cap. To replace, the old cap is
prised off and the housing removed. The new switch housing/magnet is fitted to the body before the cap is ‘snapped’ in place.
To Open the Lamp
Unlock as above, unscrew the lens ring from the body to gain access to all internal parts.
To Replace the Bulb
The bulb (3.6 Volts, 1.0 Amp) is retained by the screwed centre contact at the back of the reflector.
To Replace the Glass Disc and/or Reflector
The toughened glass disc and reflector are secured in the lens ring by the reflector retaining ring. The battery retainer (H-251 MkI/ Mk2 only) is
‘snap’ fitted in the lens ring, remove before unscrewing the reflector retaining ring. All parts must be cleaned and the rubber washer centralised
before re-assembly. A key is available for fastening/unfastening this assembly.
To Replace Fuse and/or Reed Switch
The fuse contact must be removed to replace the fuse (Shorting Link in H-251E). To replace the reed switch, the battery contact and fuse contact
must be removed.
To Replace the Battery for the H-251 Mk2
The positive and negative diode leads are disconnected from their respective terminals and the battery pack is removed from the body cavity.
To Replace the Battery for the H-251E
All connections are automatically made when the H-251E battery pack is replaced. The battery pack is a slide fit in the body cavity, clean the new
battery pack and spring contacts prior to fitting. The H-251E battery pack is deep discharge protected, it will switch off after approximately four
hours duration, preventing damage to the battery.
H-251E H-251 mk1 & 2 Eng 09/06/2003 03:34 pm Page 5
