Spectra HR320 User Manual

	HR320 Receiver
•	User Guide

www.trimble.com

How to Use the Receiver

Installing/Removing the Batteries

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.

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Introduction

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.

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.

Your comments and suggestions are welcome; please contact us at:

Trimble Construction Division 5475 Kellenburger Road

Dayton, Ohio 45424-1099 U.S.A. Phone: [phone]

[phone] FAX: [phone] Internet: www.trimble.com

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Learning the Receiver Functions
Turning On/Off the Receiver
1. Press the power/audio						Above Grade
button to turn on the
receiver.	Grade Sensitivity					Audio On
Note: When the
						On Grade
receiver is initially
turned on, all LCD						Battery Status
symbols, and the
audio signal are turned						Below Grade

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 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.

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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.Grade-Sensitivity Button— allows you to select

the receiver’s on-grade sensitivities, which include fine: 2.0 mm (1/16 in.) and coarse: 6.0 mm (1/4 in.).

3.Liquid Crystal Display (LCD)—shows the

elevation, grade sensitivity, audio, and battery status.

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2

4

1

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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.

6.Audio Port—the sound comes out of this opening.

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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.

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 show an on-grade reading.

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7.Clamp-Tab Recess—the general-purpose clamp release tab fits into this area locking the clamp in place.

8.Clamp Slots—allows the clip-on general-purpose clamp to attach to receiver.

9.Battery Housing—holds two AA alkaline, Ni-MH, or Ni-Cd batteries.

10.Battery Door—holds the batteries securely in place.

11.Label—shows the serial number and manufacturing date.

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LCD/Audio Information

	LCD Readout					Function	Audio Output
	Down arrow					High	Fast beeping tone
	Center bar &					Fine-high	Fast beeping tone
	down arrow
	Center bar					On-grade	Continuous tone
	Center bar &					Fine-low	Slow beeping tone
	up arrow
	Up arrow					Low	Slow beeping tone
	Battery					Full battery	NA
	Battery					Low battery	N/A
	Horn					Audio on/soft/loud	Single beep
	Fine					Fine grade sensitivity	N/A
	Coarse					Coarse grade sensitivity	N/A

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