Laser Reference pro shot L1-M - Alarm Deadband Check; Out of Level Alarm Function Check; Motor Stall and Re-Start Check: (L1-M Only); Beam Power Check

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2. Alarm deadband check:
Procedure: Using the 50-1010 tilt table (or equivalent).
Place the laser on the tilt table with either the slope or cross axis aligned longitudinally.
Turn the laser on and center both displays, leaving it in standard grade alarm mode.
Now, move the tilt table pointer slowly in one direction past the first widening of the
"bubble" until the second segment turns off and the "bubble" is at it's widest. Move the
pointer back and forth slowly until you have located the point where the second segment
just goes off. Rotate the graduated wheel until the nearest mark is aligned with the
pointer. Move the pointer back across center to the other limit of the deadband, counting
the graduations as you go. Locate the point where the second "bubble" segment just goes
off on this side. The two edges of the standard deadband should be 100 arc-seconds apart
± 10 arc-seconds. Now, repeat the procedure for the other axis. If either axis is not within
tolerance, refer to the adjustment procedure.
3. Out of level alarm function check:
(Note Lasers sold with R4 Receivers stop rotating when out of level.)
Procedure:
Using the R1 or R2 receiver, Place the laser on a tripod or other secure surface. Turn the
laser on and center both displays. The receiver should display elevation information as
normal. Move one leveling screw until the laser is out of it's selected range. Now, the
receiver should display either the text or graphic laser off grade symbol. Once the laser is
re-leveled, the receiver will once again display grade information. If the receiver does
not display the laser off grade mode when the laser is off level, refer to the
troubleshooting flow charts or the repair procedures for further help.
4. Motor stall and re-start check: (L1-M Only)
Procedure:
Reach into the beam exit slot of the laser with your finger and stop the penta mirror from
spinning. The L.C.D. displays should flash the inner segments of the "bubbles" while the
motor is stopped. Once the motor is released, the displays should return to normal and
the laser should once again begin to rotate. If the laser does not return to rotation, refer to
the troubleshooting flow charts or the repair procedures for further help.
5. Beam power check:
Procedure:
Check the output beam power of the laser using a reliable laser power meter. The output
power should not be below .45mw. If the power is below this level, the distance at which
the R4 receiver will recognize the beam may be reduced. If the power is below this level,
refer to the troubleshooting flow charts or the repair procedures for further help.