7
Introduction
Thank you for choosing the BHR 350 receiver from Berner.
The BHR 350 is a battery-operated laser receiver that detects a
rotating laser beam and indicates its position relative to the beam
using LCD symbols and LEDs.
Before using the receiver, be sure to read this user guide
carefully. Included in it is information about setting up, using,
and maintaining the receiver. Also included in this manual are
CAUTIONS
and
Notes
. Each of these words represents a level
of danger or concern. A
CAUTION
indicates a hazard or unsafe
practice that could result in
minor
injury or property damage.
A
Note
indicates important information unrelated to safety.
How to Use the Receiver
Installing/Removing the Batteries
0
8. Clamp-Tab Recess—is the
area that the general-purpose
clamp’s release tab fits into.
0
9. Label—shows the serial
number and manufacturing
date.
10. Battery Housing—holds
two AA alkaline, Ni-MH,
or Ni-Cd batteries.
11. Battery Door—holds the
batteries securely in place.
Receiver
Features and Functions
1. Power/Audio Button—is
a multi-functional button
that is used to turn on/off
the receiver and adjust the
volume.
2. Marking Notches (both
sides)
—align with the
on-grade portion of the
photocell and are used to
mark elevation readings.
The marking notches are
50 mm (2 in.) from
the top of the receiver.
1. Open the battery door using a coin or your thumbnail.
2. Install/Remove the 2 AA batteries noting the positive (+) and
negative (–) diagram inside the housing.
3. Push down on the battery door until it “clicks” into position.
Learning the Receiver Functions
Turning On/Off the Receiver
Low Battery
Audio On
Below Grade
On Grade
Above Grade
Medium
Fine
BHR 350 Receiver
User Guide
•
1. Press the power/audio
button to turn on the
receiver.
Selecting the Grade Sensitivity
The receiver always starts up with the on-grade sensitivity (fine)
active.
1. Press the grade-sensitivity button repeatedly to select between
fine: 1.5 mm (
1
/
16
in.) and medium: 3 mm (
1
/
8
in.) grade
sensitivity.
Turning On/Off the LEDs
The LEDs show the position of the receiver relative to the laser
beam. Turning off the LEDs extends battery life.
1. Press the grade-sensitivity and power/audio buttons repeatedly to
turn the LEDs on or off.
Note:
When the LEDs are turned on, all LEDs light for one
second; when the LEDs are turned off, both red LEDs light for
one second.
Using the Receiver with a Laser
1. Press the power/audio button to turn on the receiver.
2. Position the receiver so that its photocell faces the laser.
3. Move the receiver up/down until the LCD and LEDs show an
on-grade reading.
Note:
The LCD shows a down arrow when the receiver is above
the laser beam, an up arrow when below it, and a horizontal line
when centered in the laser beam.
Note:
The top/bottom LED flashes when the receiver is within
6 mm (
1
/
4
in.) of being on grade and lights continuously when
the receiver is between 6 mm and 25 mm (
1
/
4
in. and 1 in.)
of being above or below the laser beam. The green LED flashes
when the receiver is on grade.
LCD/LED/Audio Information
LCD Readout
Function
Audio
Output
LED
Indication
Down arrow
High
Fast
beeping tone
Top red LED:
solid
Center bar &
down arrow
Fine-high
Fast
beeping tone
Top red LED:
flashing
Center bar
On-grade
Continuous
tone
Middle green
LED: flashing
Center bar &
up arrow
Fine-low
Slow
beeping tone
Bottom red
LED: flashing
Up arrow
Low
Slow
beeping tone
Bottom red
LED: solid
Battery
Low battery
N/A
N/A
Horn
Audio on/
soft/loud
Single beep
N/A
Fine
Fine grade
sensitivity
N/A
N/A
Medium
Medium grade
sensitivity
N/A
N/A
Note:
When the receiver
is initially turned on, all
LCD symbols, LEDs,
and the audio signal are
turned on for one second
(diagnostic mode). After
the diagnostic mode is
complete, the grade sensitivity (fine) and the audio (loud)
symbols appear.
2. Press and hold the power/audio button for one second to turn off
the receiver.
Selecting the Audio Function
The receiver always starts up with the audio mode (loud) active.
1. Press the power/audio button repeatedly to cycle through the
audio levels, which include off, soft, and loud.
Note:
If the audio function is on, the receiver beeps quickly
when the receiver is above the laser beam, slowly when below it,
and continuously when centered in the laser beam or on grade.
–
5
–
–
6
–
– 7 –
– 8 –
–
2
–
– 3 –
– 4 –
3. Grade-Sensitivity Button—
allows you to select the receiver’s on-grade sensitivities, which
include fine: 1.5 mm (
1
/
16
in.) and medium: 3 mm (
1
/
8
in.).
4. LEDs—show the position of the receiver relative to the laser
beam (high, on-grade, or low).
5. Liquid Crystal Display (LCD)—shows the elevation, grade
sensitivity, audio, and low-battery status.
6. Photocell—detects the laser beam when it strikes the receiver.
7. Audio Port—is the opening the sound comes out of.
3
2
1
6
2
5
4
7
9
10
8
11
090436_HR 350 Aufbau.indd 7
27.04.2009 12:50:33 Uhr
