TM 5-6675-348-13&P
(10) After extended storage (3 months or more), the 1145-2 Laser Transmitter's internal battery should
be charged for 24 to 48 hours.
(11) Battery life is extended by frequent charging. We recommend charging overnight every other night.
1275 LASER RECEIVER LOCATION AND DESCRIPTION OF MAJOR COMPONENTS.
a.
1275 Laser Receiver Characteristics.
The 1275 Laser Receiver is a battery-operated, hand-held laser receiver designed to detect a rotating laser
beam and provide other functions as described below. The 1275 Laser Receiver operating temperature range
is -4 F to 122 F (-20 C to 50 C) and storage temperature range is -4 F to -158 F (-20 C to 70 C).
POWER BUTTON. Turns the 1275 Laser
(1)
Receiver ON and OFF.
When turned on, the 1275 Laser Receiver displays
information about elevation, on-grade sensitivity,
audio status, low-battery condition, and back light-
ing.
(2)
ON-GRADE SENSITIVITY BUTTON.
Changes the 1275 Laser Receiver's
on-grade sensitivity.
Ultra Fine (1)
0.0 in. (0.0 cm)
Super Fine (2)
1/32 in. (0.08 cm)
Fine
1/16 in. (0.16 cm)
Medium
1/8 in. (0.32 cm)
Coarse
1/4 in. (0.64 cm)
a The Graphic Display shows which sen-
sitivity is selected.
b
Simultaneously pressing 1275 Laser
Receiver power and on-grade sensitiv-
ity buttons while the 1275 Laser Receiver is powering up configures 1275 Laser Receiver for a
0.0-in. (0.0 cm) on-grade sensitivity.
The 1275 Laser Receiver can also be service center configured for a 1/32-in. (0.79 cm) on-grade
c
sensitivity.
AUDIO BUTTON AND SOUNDER. Turns the 1275 Laser Receiver audio sounder to Loud, Soft, or
(3)
OFF.
The 1275 Laser Receiver always turns ON with audio set to OFF. The 1275 Laser Receiver beeps
a
quickly when receiver is slightly above laser beam, slowly when below it, and continuously when
centered in laser plane or on grade.
Simultaneously pressing the 1275 Laser Receiver's power and audio buttons while the 1275
b
Laser Receiver is powering up configures the 1275 Laser Receiver to have Audio/On-Grade off
for applications where the 1275 Laser Receiver is used for monitoring.
FRONT AND BACK LIQUID CRYSTAL DISPLAYS (LCD). Provide information about elevation,
(4)
on-grade sensitivity, audio status, low-battery and transmitter out-of-level conditions, and back
lighting.
Simultaneously pressing all three receiver buttons during power up configures receiver to perform a Graphic
Display self-diagnostics test, flashing each Graphic Display symbol independently until the power button is
pressed again.
