4.3.4
Optical
Alignment Procedure with Mirrors
EZ-SCREEN Type 2 sensors may be used with one or more corner mirrors for guarding more than one side of an area. The MSM-... and
SSM-... rear-surface glass mirrors are rated at 85%
efficiency.
Thus, excess gain and sensing range are reduced when using mirrors; see
on page 16.
During any adjustments, allow only one individual to adjust any one item at any one
time.
In
addition
to the standard
optical
alignment procedure, verify:
1. The
emitter,
receiver, and all mirrors are level and plumb.
2. The middle of the
defined
area and the center point of the mirrors are approximately the same distance from a common reference
point, such as the same height above a level
floor.
3. There are equal amounts of mirror surface above and below the
defined
area such that the
optical
beams are not passing below or
above the mirror.
Note: A LAT-1-LSLaser Alignment Tool is very helpful by providing a visible red dot along the
optical
axis. See
on page
28 and Banner Safety
Applications
Note SA104 (p/n 57477) for further
information.
Figure 14.
Optical
alignment using the LAT-1-LS
Component 2 (Mirror)
Component 3 (Mirror)
Component 4 (Receiver)
Component 1 (Emitter)
Figure 15. Corner Mirror Alignment
4.3.5 Trip Test
After
optimizing
the
optical
alignment, perform the trip test to verify the
detection
capability of the EZ-SCREEN Type 2 System. This test
will also verify correct sensor
orientation
and
identify
optical
short circuits. Once the
installation
has passed the trip test, the safety
outputs may be connected and the commissioning checkout may be performed
(initial
installations
only).
1. Use the 30 mm (1.18 in) diameter
specified
test piece supplied with the receiver .
2. Verify that the System is in Run mode, the Status Clear indicator is ON steady Green (or
flashing
if reduced
resolution
is
enabled), all Zone indicators are Green, and the Yellow Status indicator is ON. A manual reset may be required in Latch mode.
3. Pass the
specified
test piece through the
defined
area in three paths: near the
emitter,
near the receiver, and midway between
the
emitter
and receiver.
Receiver
Emitter
Test Piece
Figure 16. Trip Test
4. During each pass, while the test piece is
interrupting
the
defined
area, at least one Zone indicator must be Red. The Red Zone
indicator must change with the
position
of the test piece within the
defined
area.
EZ-SCREEN
®
Type 2 Light Screen
28
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