Spectra GPS Receiver HR320 User Manual

Introduction  
Receiver  
7. Clamp-Tab Recess—the  
general-purpose clamp  
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.  
11  
Thank you for choosing the Spectra Precision® Laser HR320 from  
the Trimble® family of precision products. The HR320 is a  
battery-operated laser receiver that detects a rotating laser beam and  
indicates its position relative to the beam using LCD symbols.  
HR320 Receiver  
7
8
3
4
5
release tab fits into this area  
locking the clamp in place.  
User Guide  
2
8. Clamp Slots—allows the  
clip-on general-purpose  
1
Before using the receiver, be sure to read this user guide  
clamp to attach to receiver.  
2. Grade-Sensitivity Button—  
allows you to select  
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.  
9. Battery Housing—holds  
two AA alkaline, Ni-MH,  
or Ni-Cd batteries.  
the receiver’s on-grade  
9
sensitivities, which include  
fine: 2.0 mm (1/16 in.) and  
coarse: 6.0 mm (1/4 in.).  
10  
10. Battery Door—holds the  
6
batteries securely in place.  
3. Liquid Crystal Display  
(LCD)—shows the  
elevation, grade sensitivity, audio,  
and battery status.  
4. Photocell—detects the laser beam when it strikes the receiver.  
5. Marking Notch—align with the on-grade portion of the  
photocell and is used to mark elevation readings. The marking  
notch is 50.0 mm (2 in.) from the top of the receiver.  
Your comments and suggestions are welcome; please contact us at:  
11. Label—shows the serial  
number and manufacturing  
date.  
Trimble Construction Division  
5475 Kellenburger Road  
Dayton, Ohio 45424-1099 U.S.A.  
Phone: (937) 245-5600  
(800) 538-7800  
FAX:  
(937) 233-9004  
6. Audio Port—the sound comes out of this opening.  
2 –  
3 –  
4 –  
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: 2.0 mm (1/16 in.) and coarse: 6.0 mm (1/4 in.) grade  
sensitivity.  
How to Use the Receiver  
Learning the Receiver Functions  
LCD/Audio Information  
Installing/Removing the Batteries  
Turning On/Off the Receiver  
LCD Readout  
Function  
Audio Output  
1. Press the power/audio  
button to turn on the  
receiver.  
Down arrow  
High  
Fast beeping tone  
Above Grade  
Audio On  
Center bar &  
down arrow  
Grade Sensitivity  
Fine-high  
On-grade  
Fine-low  
Fast beeping tone  
Continuous tone  
Slow beeping tone  
Note: When the  
On Grade  
receiver is initially  
turned on, all LCD  
symbols, and the  
audio signal are turned  
on for one second  
(diagnostic mode).  
After the diagnostic  
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.  
Center bar  
Battery Status  
Center bar &  
up arrow  
Below Grade  
3. Move the receiver up/down until the LCD show an on-grade  
Up arrow  
Battery  
Battery  
Horn  
Low  
Slow beeping tone  
reading.  
Full battery  
Low battery  
NA  
mode is complete, the grade sensitivity (fine) and the audio  
(loud) symbols appear.  
N/A  
2. Press and hold the power/audio button for one second to turn off  
the receiver.  
1. Open the battery door using a coin or your thumbnail.  
Audio on/soft/loud  
Fine grade sensitivity  
Single beep  
N/A  
2. Install/Remove the 2 AA batteries noting the positive (+) and  
Selecting the Audio Function  
The receiver always starts up with the audio mode (loud) active.  
Fine  
negative (–) diagram inside the housing.  
3. Push down on the battery door until it “clicks” into position.  
Coarse  
Coarse grade sensitivity N/A  
1. Press the power/audio button repeatedly to cycle through the  
audio levels, which include loud, off, and soft.  
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.  
When audio is off, a single beep indicates laser is detected.  
5 –  
6 –  
7 –  
8 –  
 

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