Spectra HR320 - Laser Receiver Manual

Introduction

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.

indicates a hazard or unsafe practice that could result in minor injury or property damage.

A Note indicates important information unrelated to safety.

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.
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.

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

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.

Learning the Receiver Functions

Turning On/Off the Receiver

1. Press the power/audio button to turn on the receiver.
   Note: When the receiver is initially turned on, all LCD symbols, 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 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.

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.

LCD/Audio Information

LCD Readout		Function	Audio Output
Down arrow		High	Fast beeping tone
Center bar & down arrow		Fine-high	Fast beeping tone
Center bar		On-grade	Continuous tone
Center bar & up arrow		Fine-low	Slow beeping tone
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

General-Purpose Clamp

The C59 general-purpose clamp allows the receiver to be attached to a grade rod or wooden pole.

Features and Functions

1. Release Tab—allows the receiver to be locked onto or released from the general-purpose clamp.
2. Jaws—close/open so that the general-purpose clamp can be attached to or released from a grade rod or wooden pole.
3. Jaws Screw—controls the closing/opening of the jaws.
4. Reading Edge—aligns with the receiver's on-grade marking notch.
5. Bubble Screw Holes—are where the optional 1277-6251S bubble vial kit is mounted.

Attaching the Receiver to the Grade Rod or Wooden Pole

1. Slide the general-purpose clamp into the receiver until it "clicks" into position.
2. Turn the jaws screw counterclockwise to open the clamp's jaws.
3. Slide the grade rod or wooden pole between the clamp's jaws.
4. Turn the jaws screw clockwise to hold the general-purpose clamp securely in place.

Receiver Specifications

Protecting the Environment

The unit, accessories and packaging ought to be recycled.

All plastic parts are marked for recycling according to material type.

Do not throw used batteries into the garbage, water or fire.
Remove them in compliance with environmental requirements.

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

Spectra Precision LLC
3265 Logistics Lane, Suite 200
Dayton, Ohio 45377 U.S.A.
Phone: (800) 527-3771
Internet: www.spectraprecision.com