Spectra Trimble hl750 User Manual Download Page 1

Captive Rod Clamp Screw - attaches to the back of detector.

1. 

Alignment Points (2) - help secure and align rod clamp.

2. 

Level Vial - can be viewed from above or below to verify that the 

3. 

rod is plumb.
Clamping Screw Knob - secures clamp to rods by moving the 

4. 

traveling jaw. Clockwise tightens; Counterclockwise loosens.
Reference Bar - top of bar is aligned with on-grade. 

5. 

Traveling Jaw - moving jaw grips tightly to rods.

6. 

Reversible Face - slanted face for round and oval rods; flat face 

7. 

for rectangular and square rods.

www.trimble.com

HL750 / HL750U  

Laserometer

User Guide

1. 

Keypad - Power, Accuracy, Units & Volume switches. 

2. 

LED Display - Green for on-grade, Red for high, Blue for low

3. 

Beeper output - Fast, solid & slow audible signal.

4.  

Bubble Vial - aids in keeping  level.

5.  

Anti-strobe sensor - Reduces false indication from 

 

strobe lights.

6. 

SuperCell Reception Window - 5.0 in / 127.0 mm of height.

7.  

Front LCD - Displays elevation, settings and status.

8. 

On-grade Mark - Aligned with laser center on-grade 

 

reading.

9. 

Battery Door & Latch for two “AA” batteries.

10. 

Marking Notch (3.15 in / 80.0 mm from top).

11. 

Captive Screw Thread, Center on-grade clamp position.

12.   Captive Screw Thread, Offset on-grade clamp position.

13.   Clamp Guides - Dimples align rod clamp.

14. 

Serial Number / ID Label.

15.   Rear LCD - repeats indications of front LCD.

16. 

Rubber over mold - Protects the unit from drops

Front view

Rear view

Working Radius: 

1 m - 460 m (3 ft - 1500 ft)

(Laser dependent): 

Laser Detection Height:  127.0 mm     (5“)

Numeric Readout Height:  102.0 mm     (4“)

Internal Radio:  

Full 2-way communication, operation    

 

 

 

and security lock with paired device

Radio Working Radius:   Up to 80 m (260 ft), depending on  

 

 

 

 

orientation, conditions and paired device

Accuracy (Deadband): 

 

  Ultra Fine 

0.5 mm 

0.02 in 

1/32 in

  Super Fine 

1.0 mm 

0.05 in 

1/16 in

  Fine 

 

2.0 mm 

0.10 in 

  1/8 in

  Medium 

  5.0 mm 

0.20 in 

  1/4 in

  Coarse 

10.0 mm 

0.50 in 

  1/2 in

  Calibration 

0.1 mm 

0.01 in 

1/64 in

Reception Angle: 

± 45° minimum

Detectable Spectrum: 

610 nm ... 780 nm (HL750)

 

 

 

520 nm ... 780 nm (HL750U)

Beeper Volumes: 

Loud = 110 dBA

 

 

 

Medium = 95 dBA

 

 

 

Low = 65 dBA

LED Grade Indicators: 

Front, Green on-grade, 

 

 

 

Red Hi, Blue Low

Power Supply: 

2 x 1.5 Volt “AA” batteries

Battery Life:   

60+ hours

Automatic Shut Off: 

Selectable, 30 min, 24 h, Off

Environmental: 

Waterproof, Dustproof to IP67

Weight without clamp: 

371 g (13.1 oz.)

Dimensions without 

clamp:   

 

168.0 x 76.0 x 36.0 mm 

 

 

 

(6.6” x 3.0” x 1.4”)

Operating Temperature:  -20°C...+60°C (-4°F... +140°F)

Storage Temperature: 

-40°C...+70°C (-40°F...+158°F)

*Specifications subject to change without notice.

Trimble warrants the HL750 / HL750U to be free of defects in material 

and workmanship for a period of three years. Trimble or its authorized 

service center will repair or replace, at its option, any defective part, or 

the entire product, for which notice has been given during the warranty 

period. If required, travel and per diem expenses to and from the place 

where repairs are made will be charged to the customer at the prevailing 

rates. Customers should send the product to Trimble Navigation Ltd. or 

the nearest authorized service center for warranty repairs or exchange, 

freight prepaid. Any evidence of negligent, abnormal use, accident, or any 

attempt to repair the product by other than factory-authorized personnel 

using Trimble certified or recommended parts, automatically voids the 

warranty. The foregoing states the entire liability of Trimble regarding the 

purchase and use of its equipment. Trimble will not be held responsible 

for any consequential loss or damage of any kind. This warranty is in lieu 

of all other warranties, except as set forth above, including any implied 

warranty merchantability of fitness for a particular purpose, are hereby 

disclaimed. This warranty is in lieu of all other warranties, expressed or 

implied.

Battery Status

Rod Clamp

Move clamp position

Notice to Our European Union Customers

For product recycling instructions and more information,

please go to: www.trimble.com/environment/summary.html

Recycling in Europe

To recycle Trimble WEEE,

call: +31 497 53 2430, and

ask for the “WEEE associate,” or

Mail a request for recycling instructions to:

Trimble Europe BV c/o Menlo Worldwide Logistics

Meerheide 45 5521 DZ Eersel, NL

1. 

Open the battery door using a coin or similar pry device to release the battery door tab.

2.  

Insert two AA batteries noting the plus (+) and minus (-) diagrams inside the battery housing.

3. 

Close the battery door. Push down until it “clicks” into the locked position.

Trimble Construction Division

5475 Kellenburger Road

Dayton, Ohio 45424-1099

U.S.A.

+1-937-245-5600 Phone

www.trimble.com

© 2009, Trimble Navigation Limited. All rights reserved.

PN 1277-5470 (10/09)

Specifications

Warranty

Installing the Batteries

N324

Offset

 

on-grade clamp position

 - clamp 

position is sensed automatically and 

displayed. Offset clamp position moves 

the on-grade location to allow more grade 

information to be displayed above grade. 

This is useful in applications where going 

below grade is not required, i.e. driving 

stakes down to grade.

Flashing -

Change 

Batteries

Outline -

  

Approx.

30 Minutes

Remaining

Full -

Batteries 

OK

Half -

Initial

Warning

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EMC Declaration of Conformity

This device has been tested and found to comply within the limits for 

a Class B digital device for radio noise for digital apparatus set out 

in  the  Radio  Interference  Regulations  of  the  Canadian  Department 

of  Communication,  and  is  pursuant  to  part  15  of  the  Federal 

Communication Commission (FCC) rules. These limits are designed 

to  provide  reasonable  protection  against  harmful  interference  in  a 

residential installation.

This receiver generates radio frequency. If it’s not used in accordance

with  the  instructions,  it  may  cause  harmful  interference  to  radio  or 

television reception. Such interference can be determined by turning 

the  receiver  off  and  on.  You  are  encouraged  to  try  eliminating  the 

interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the laser and the receiver.

For more information, consult your dealer or an experienced

radio/television technician.

CAUTION:

 Changes or modifications to the receiver that are not expressly 

approved by Trimble could void authority to use the equipment.

CE Declaration of Conformity

Application of Council Directive(s):   89/336/EEC

Manufacturer’s Name:  

Trimble Navigation Ltd.

Manufacturer’s Address:  

5475 Kellenburger Road

 

Dayton, Ohio 45424-1099 U.S.A.

European Representative Address:   Trimble GmbH Am Prime Parc 11

 

65479 Raunheim, Germany

Model Number:  

HL750, HL750U

Conformance to Directive(s):  

EC Directive 89/336/EEC using

 

EN55022, EN300-440, EN301-489 

 

and EN61326

Equipment Type/Environment: 

ITE/residential, commercial

 

& light industrial

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