EZ-SCREEN
®
LPM Safety Light Screen
System Semi-Annual Checkout Procedure
Printed
in
USA
10/11
P/N 150219 rev. A
To Be Performed Every Six Months Following System Installation:
Perform the procedure contained on this Semi-Annual Checkout card every six months following System installation, or whenever changes are
made to the System (either a new configuration of the EZ-SCREEN LPM or changes to the machine).
Semi-Annual checkouts must be performed by a
Qualified Person (as defined by OSHA and in the Safety Glossary of the manual). A copy of the checkout results should be kept on or near the ma chine: see
OSHA 1910.217(e)(1).
To prepare for this checkout, configure the EZ-SCREEN LPM as it will
be during machine operation.
The Qualified Person must:
1.
Examine the guarded machine to verify that it is of a type and
design compatible with the EZ-SCREEN LPM. See Section 2.3
of the Instruction Manual for a list of appropriate applications and
limitations.
2. Verify that the minimum separation distance
from the closest
hazard point of the guarded machine to the defined area is not less
than the calculated distance, determined in Section 3.1.1 of the
Instruction Manual and indicated here: _____________.
3. Verify that:
•
Access to any dangerous parts of the guarded machine
is not
possible from any direction not protected by the EZ-SCREEN LPM,
hard guarding, or supplemental safeguarding, and
•
It is not possible for a person to stand
between the safety light
screen and the dangerous parts of the machine, or
•
Supplemental safeguarding and hard guarding,
as described
by the appropriate safety standards, are in place and functioning
properly in any space (between the safety light screen and
any hazard) which is large enough to allow a person to stand
undetected by the EZ-SCREEN LPM. See sections 3.1.2 and 3.1.3
of the Instruction Manual.
4. Verify that:
•
The reset switch is mounted outside the guarded area,
out of
reach of anyone inside the guarded area and
•
The key or other means of preventing inadvertent use is in
place.
5. Examine the electrical wiring connections
between the
EZ-SCREEN LPM OSSD outputs and the guarded machine’s control
elements to verify that the wiring meets the requirements stated in
Section 4.
6. Inspect the area near the defined area
(including work pieces and
the guarded machine) for reflective surfaces. (Reflective surfaces
may cause System beams to reflect around a person in the light
screen, preventing the person from being detected and not stopping
the machine motion.) Remove the reflective surfaces as possible by
relocating them, painting, masking or roughening them. Remaining
problem reflections will become apparent during step 10.
7. Apply power to the EZ-SCREEN LPM. Ensure that power to the
guarded machine is OFF.
Remove all obstructions from the defined
area. If the System is configured for Latch mode, the receiver Reset
indicator will be double-flashing. Perform a manual reset (close the
reset switch for 1/4 to 2 seconds, then open the switch). Verify that
the Reset indicator is ON steady.
8.
Observe the receiver Diagnostic Display to verify that the System is
set to the desired operating mode (Trip Output - “–”; Latch - “L”).
Observe the status indicators on the receiver to determine System
status:
•
Lockout:
Status flashing Red
All others OFF
•
Blocked:
Status ON Red
One or more Zone indicators ON Red
Reset ON Yellow
•
Clear:
Status ON Green*
All Zone indicators ON Green
Reset ON Yellow
•
Latch:
Status ON Red
(defined
All Zone indicators ON Green
area clear)
Reset flashing Yellow
•
Muted:
Mute Device Input Indicators ON Yellow
Mute Lamp ON (if used)
The Display flashes a “-“ (Trip) or “L” (Latch)
* The Green indicator will be flashing if Reduced Resolution is
enabled.
9. If in a Clear condition, go to step 10. If in a Lockout condition,
refer to Section 6 of manual.
A Blocked condition indicates that
one or more of the beams is misaligned or interrupted. To correct
this situation:
a. Check carefully for any obstruction
in the beam path.
b. Check for contamination.
Clean the emitter and receiver
windows as required (see Section 6.4 of the manual).
c. If the defined area is completely clear of obstructions,
realign the emitter and receiver, as described in Section 4.3.4 of
the manual.
If the System is in a Latch condition, perform a manual reset.
Ensure that the System is not in a muted condition or that bypass/
override is enabled.
10.
Once the Status indicator and all Zone indicators are Green,
perform the trip test
(described on the Daily Checkout card) to
verify proper System operation and to detect possible reflection
problems.
WARNING . . .
If Trip Test Indicates a Problem
If the EZ-SCREEN LPM does not respond properly to the
trip test, do not attempt to use the machine.
If this occurs,
the EZ-SCREEN LPM cannot be relied upon to stop dangerous
machine motion when a person or object enters the defined area.
Serious bodily injury or death could result.
