The R7 Electronic Laser Receiver combines an affordable price with the features of high end, high cost laser receivers. It works with all Pro Shot laser transmitters, and most other brands of rotating lasers on the market. Grade information is conveyed via a LCD front panel display, a LED display on its backside, and audio tones. The visual display now provides 5 channels of information, high, high fine, on grade, low fine, and low. The user can select between three operating accuracies, ultra-fine (+/-1/64 inch), standard (+/-1/16 inch), and coarse (+/-1/8 inch). The R7 provides between 500 and 1000 feet (152m to 305m) of working range depending upon which Pro Shot transmitter it is paired with. The receiver runs for approximately 60 hours on a 9V alkaline battery. 3 year Guardian Warranty.

It is important to know how to check calibration of a laser level. We recommend that you check the calibration of your laser after it has been shipped, or if it has taken a drop or an impact. The following procedure will work with any rotating laser level.

Checking the calibration of the laser is the responsibility of the contractor. This is a simple procedure that takes about 10-15 minutes. The only equipment needed are a flat head tripod, the laser and detector, and a carpenter's level.

Set the tripod up so that it is approximately 30m from a fixed object such as a wall or utility pole. Take the carpenter's level, and, using the tripod legs, level the head of the tripod as carefully as possible.

Attach the laser to the tripod and level it with the screws on the laser base, (L4, L4+, and L5 only). Servo leveled lasers such as the L1-AS, L6 and ALPHA will automatically level upon being turned on. If the tripod head has been properly leveled, it will be possible to rotate the laser 360° on the tripod with minimal re-levelling.

Rotate the laser so that the front is pointed at the target. On the L1-AS this will be the sloping part of the main housing. On the L4, L4+, or L5 this will be the side with the control panel.

Turn the laser on, then go to the target with the detector. Remove the clamp. When the detector gives the on grade signal, make a mark on the target using the detector's marking notch. Label this mark +Y.

Go back and rotate the laser 180 degree so that the back side of the laser is pointed at the target. This will be the side with the battery cover. Make sure that the laser is still level. Make a level mark with the detector, just as before. Label this mark -Y. The mid point between the -Y and +Y marks is true level. If the specified accuracy of the laser is +/-3mm inch, neither the -Y or +Y marks should be more than 3mm inch from the mid point. If the specified accuracy of the laser is +/-1.5mm inch, neither the -Y or +Y marks should be more than 1.5mm from the mid point.   

The L1-AS Magnum, L4, L4+, L3, and L5 lasers are designated class II or IIIa under the 1993 IEC 825-1 laser safety standard and the revised edition of the European Norm EN60825. They conform to applicable EC directives regarding RFI and EMI. US OSHA requires that a jobsite warning placard must be posted in the work area, and laser operator must carry proof of qualification. Only qualified and trained employees are to install, adjust, and operate the laser. The laser should be set up above head level and never intentionally aimed at anyone. The laser should be turned off when not being used.

Magnum run on 4 C cells. Disposable alkaline batteries or rechargeable NiMH batteries can be used. We recommend the NiMH rechargeable batteries. They provide almost as much run time as alkaline batteries, (more than 40 hours in all our lasers), and can be charged up to 500 times under optimal conditions. They provide hundreds of dollars of savings in battery costs over the life of the laser. Furthermore, NiMH batteries are less toxic to the environment, and put less strain on our landfills than alkaline or NiCd batteries. [ Because they do not maintain voltage, heavy duty type batteries should not be used and combinations will cause breadown. ]

Safety:

The maximum allowable power output in a rotating construction laser is 5 milliwatts or less. A milliwatt is 1/1000th of a watt, a very small amount of power. The light is concentrated however, and the following precautions should be taken when using such an instrument:

Do not stare into a laser beam or view it directly with optical instruments.

Do not disassemble the laser or attempt to service it.

Do not use the laser until you have read the instruction manual and you are familiar with the operation of the instrument.

Infra-red beam lasers are designated class 1 laser products. No jobsite warning placards or operator certification cards are required. No Product warning labels are required on the laser. These meet class 1 requirements under the 1993 IEC 825-1 laser safety standard and the revised edition of the European Norm EN60825.