Mercury 2+ Operator Terminal User Manual Page 3 of 82 2019r0
The Mercury 2+ has special conditions for safe use (denoted by X after the certificate number) applicable
to it. There are six conditions applied, which are shown verbatim below, followed by an explanation
written by Mercury HMI Ltd.
Sira Certification Services, specific conditions for safe use:
1. Parts of the enclosure are nonconducting and may generate an ignitioncapable level of
electrostatic charge under certain extreme conditions. The user should ensure that the equipment is
not installed or used in a location where it may be subjected to external conditions (such as high
pressure steam) which might cause a buildup of electrostatic charge on nonconducting surfaces.
Additionally, cleaning of the equipment should be done only with a damp cloth.
2. As aluminium is used at the accessible surface of this equipment, in the event of rare incidents,
ignition sources due to impact and friction sparks could occur. This shall be considered when the
equipment is being installed in locations that specifically require group II, category 1G equipment.
3. The equipment may be used in conjunction with a bar code wand, which may be unplugged. Only
the type bearing the certificate number Sira 02ATEX2297X may be used.
4. The bar code wand does not meet the 500 V insulation requirements. This shall be taken into
account when the equipment is being installed.
5 The user shall take account of the fact that the equipment has been assessed assuming a low risk of
impact in service.
6. The barcode wand shall not be used in the presence of combustible dust.
Mercury HMI Ltd explanation of the special conditions for safe use:
1. The Mercury 2+ has areas of the enclosure (for example, the display window) that could generate
static under some circumstances, and if the static were to build up then a spark could result. To
avoid this risk, do not clean or polish the device with a dry cloth or position it where jets of high
pressure steam or other gases could blast over its surface.
2. This is a warning that the enclosure is made of LM24 grade Aluminium, and there is the potential
for sparking to occur by impact or friction from objects hitting it. Hence position/protect the unit so
that it is unlikely to be struck.
3. This is not relevant to the Mercury 2+, since there is not a bar code wand available and the socket is
not fitted.
4. Not relevant, see 3 above.
5. Please position the Mercury 2+ terminal to avoid it being physically struck in normal operation.
6. Not relevant, see 3 above.
Specific Conditions Of Use
