22
(h)
Check that actuation of the sensor
during a dangerous phase of operation of
the machine results in the dangerous parts
being arrested, or where appropriate,
assuming an otherwise safe condition,
before any part of a person could reach
them.
(i)
Check that, after the machine has
been stopped by the actuation of the
safety mat system, it is not possible for
the dangerous parts to be set in motion
until the sensor has been cleared, the
reset button has been operated and
released, and the machine start control
has been re
-
operated.
(j)
Check that the r emoval of power
from the safety mat system prevents
further operation of the machine. It
should not be possible for the dangerous
parts of the machine to set in motion until
power has been restored, the reset button
has been actuated and released, and the
machine start control has been actuated.
(k)
Check that the sensor (s) oper ate
over the whole active area by walking,
‘heel to toe’, over the whole area in two
directions,
as shown in Figure 23. Actuation can be
checked by observing the SENSOR
CLEAR indicator which is lit when the
sensor is clear and off when the sensor is
actuated.
(l)
Examine the stopping per for mance
monitor (if fitted) to ensure that it is fitted
and functioning correctly. Ensure that the
means
by
which
the
stopping
performance can be assessed by the
operator is indicating correctly.
(m)
Test the muting ar r angements (if
fitted). Ensure that the muting is only
possible during non
-
dangerous operation
and ensure that the safety level of the
muting device is at or above that of the
safety mat but never below.
(n)
Examine br akes and clutches (if
fitted) as recommended.
NOTE:
No
stopping
performance
monitor or muting facilities are provided
with the Tapeswitch safety mat system
and there is no means provided for the
connection of such devices to the system.
These devices may however have been
provided elsewhere in the machine
control system.
Figure 23
-
Checking operation of sensor
