P52/62 T-IM114b
9.5.4 Fuses
External fuses
Mains input fuses (item 13, Fig. 2.2 or item 5, Fig. 2.3)
2 x T4A (5 x 20mm) 250V
Battery fuses (item 2, Fig. 2.2). Note: On the T20-m
these fuses are fitted internally.
2 x T20A (6.35 x 32mm) 500V
Mains plug fuse (if fitted) 10A.
Internal fuses (only accessible by engineer)
Battery fuses (joining each battery pair)
2 x 30A blade type (1 per battery pair)
2 x T20A (6.35 x 32mm) 500V (these fuses
are fitted externally on the T20-a and T20-s)
9.5.5 Duty cycle
This symbol is used to indicate the table’s duty cycle
which, in the worst case, is ‘60s : 600s’, the ratio of the
operating time to the sum of the operating time and the
ensuing interval (see note below). Each motor drive has
its own duty cycle and this is dependent on loading and
table position as detailed below.
Trendelenburg 1 : 4 (60s : 240s) at a maximum torque
of 417Nm (e.g. 135kg load offset 31cm from the
fulcrum, or a 300kg load offset 14cm from the
fulcrum. Where this load is the patient and
accessories weight and the offset is how far the loads
centre of gravity is, from the centre of the column).
Traverse 1 : 4 (60s : 240s) when the table is horizontal
and at the maximum load of 300kg, or at 17.5° with
a patient weight of 225kg, or at 35° with a patient
weight of 150kg.
Break 1 : 10 (60s : 600s) at maximum patient weight
of 300kg.
Height 1 : 4 (60s : 240s) at maximum patient weight
of 300kg (not offset).
Tilt 1 : 4 (60s : 240s) at maximum patient weight
of 300kg.
Note: The duty cycles above are all for the worst case (i.e.
maximum loads). For reduced loading the above duty
cycles can be increased.
9.6 Classification and symbology
All the symbols used on this table are shown and explained
in section 2.2. These detail the safety category and class
of this table as marked on the table or section by the use
of these symbols.
9.7 Use with other equipment
9.7.1 Electrosurgical equipment (h.f.)
The T20 Series of operation table have been designed to
minimise the possibility of accidental electrosurgery burns
and can be used in conjunction with electrosurgical
equipment. However contact with any metal surfaces (e.g.
table side rail, or other equipment etc.) can cause burns
during electrosurgery and must be avoided.
9.7.2 Defibrillation equipment
With the mains cord attached the equipment has a
defibrillator proof applied part with type BF protection
against electric shock.
9.7.3 RF communications equipment
See section 9.11 ‘Electromagnetic compatibility’.
9.8 Standards compliance
The table has been designed and built to comply with the
following international standards:
BS EN 60601-1: 1990 and all amendments to date
BS EN 60601-1-2: 2001
BS EN 60601-2-46: 1998
BS EN 60601-1-4: 1997
9.9 Environmental conditions
9.9.1 Operating environment
The table has been designed to operate in the following
environment:
Temperature range .. .. 10°C to +40°C
Pressure range .. .. .. 69KPa to 106KPa.
Humidity range .. .. .. 30% to 75% RH
non-condensing.
9.9.2 Transport & storage environment
The table can be transported and stored safely, in the
following environment:
Temperature range .. .. -30°C to +50°C
Pressure range .. .. .. 69KPa to 106KPa
Humidity range .. .. .. 30% to 90% RH
non-condensing.
9.10 Alarms
9.10.1 Visual
Visual alarm functions of this table are LED indicators for
mains ‘on’ and battery charge state (see Figs. 2.3 and 2.3)
situated on the table base and battery charge level
indication (see Fig. 5.9) provided on the corded handset.
Ensure you are familiar with these before using this
operation table (see sections 5.3.1). There is also an LED
indicator to show that the table is switched ‘on’ (see item 4,
Fig. 2.2 and 2.3).
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