Product Manual

10 R7 System Receiver
The R7 senses the plane of laser light
projected by the Alpha transmitter
and indicates a height position rela-
tive to the plane (high, low, or on
grade). The R7 uses a five channel
front LCD and a 3 channel rear LED
display to convey elevation informa-
tion. Along with the visual displays,
an audio tone also indicates when the
receiver is high, low, or on grade.
When the R7 is exactly centered at
the beam height, an on grade bar indi-
cation is displayed and a steady tone
can be heard. If the R7 is too high, an
arrow shows the direction to move the
receiver and a fast beep will be heard.
If the R7 is too low, an up arrow shows the way to move the receiver and a
slow beep will be heard.
The R7 has three control switches, power on/off, tone high/low/off, and on
grade accuracy selection. Pressing the power switch activates the R7. The au-
dio tone will sound and the LCD display will show the tone and accuracy
icons. The R7 is ready to operate in standard accuracy with loud tone. Pressing
the volume switch one changes to low volume, twice turns the volume off.
When the volume is off, there will still be a single tone the first time the R7
senses a laser signal. Pressing the accuracy switch once changes to the coarse
setting, twice changes to fine. The R7 automatically turns off if no laser beam
strikes are received for twelve minutes. The R7 is powered by a 9V battery that
lasts approximately 60 hours. When the battery is nearly used up, the low bat-
tery indicator will be displayed. To replace the battery, locate the battery door
on the back of the housing and slide the door toward the bottom of the receiver.
Remove the battery from the compartment (you may need to tap the R7 on
your palm to free to battery). Replace the battery following the diagram
molded on the battery door.
R7 Specifications
Reception Height
Reception Angle
On Grade Accuracies
Power Supply
Automatic Shut Off
Environmental
Mount Clamping Range
2 inches (50mm)
120 degrees
±1/16” std, ±1/8” coarse, ±1/64” fine
9V alkaline, 60 hours run time
After 12 min. (no laser strikes)
Sealed against dust & water
5/8” to 2-1/2” (16 –65mm)