Trimble HL750U User Manual

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 s ensor - Re duces fal se indica tion 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-w ay commun ication, o peration
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 Grad e Indicat ors: Fro nt, 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 certied 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 tness 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: [phone], 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.

Survey Instrument Sales
24037 Acacia
Redford, MI 48239
U.S.A.
[phone] Phone

www.surveyinstrumentsales.com

© 2009, Trimble Navigation Limited. All rights reserved.

PN 1277-5470 (10/09)

Specications

Warranty

Installing the Batteries

N324

Offset on-grade clamp position - clam p
position is sense d automati cally and
displaye d. Offset clamp pos ition mov es
the on-g rade loca tion to al low more grade
informat ion to be displayed above gr ade.
This is useful in applications where going
below gr ade is no t required , i.e. dr iving
stakes down to grade.

Flashing -

Change

Batteries

Outline -

Approx.
30 Minutes
Remaining

Full -

Batteries

OK

Half -

Initial

Warning

5

4

2

1

6

7

3

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 modications 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

4

6

7

5

1

2

3

8

9

10

11

12

14

15

16

13

1. Pair the Two HL750’s
Turn on both HL750 Laserometers that are to be paired and follow below directions for both units.
Enter the MENU of the HL750’s. The RDIO functions will be shown
Enter the RDIO functions to display the MODE selection
If HL is not displayed, Enter the MODE function and scroll up or down to select HL for each HL750 and ENTER.
Scroll d own to PAIR function. ENTER to activate pairing.

The PAIR sy mbol will rotate b riefly un til both units com plete the PAIR operat ion.
PAIR OK indicates function complete.

2. Remote Operation

Turn both HL750’s Off.
The first HL750 turned on becomes the laser SENSOR (receiver). The second HL750 turned on becomes the
REMOTE DISPLAY / CONTROL PANEL.
Turn on th e HL750 t hat is de sired to be the SE NSOR firs t. Mount at the de sired elev ation so that it c an receiv e the
laser beam.
Turn on the HL750 that is desired to be the REMOTE DISPLAY / CONTROL PANEL second.
RMT.D – OK will be displayed.
Press EN TER to op erate this HL750 as the REMO TE DISPLAY / CONTROL PANE L.

NOTE: If ENTER is not pressed, both HL750’s will revert to standard operation.

During R EMOTE DIS PLAY / CONTRO L PANEL opera tion, RMT.D i s display ed. The Un it will r emotely
display the eleva tion readi ngs of th e SENSOR, as long as the Ante nna symbo l shows t he two ar e within
radio range of each other up to 80 meters (260 ft).

The RMT.D unit can remotely adjust the Accuracy and Units of Measure of the SENSOR.

A) HL750 is in the laser beam and the
power is on:

Press any switch to re turn to nor mal
operation.

The current elevation read­ing will b e held. A flashi ng
display wi ll confirm t he
reading has been captured

.

1 x quick

B) HL750 is out of the laser beam and
power is on:

A short in termitten t
beep (Th e beeper
will tur n on to L ow if
turned off.)

+

1.

Press any switch to re turn to nor mal
operation.

2. Place the HL750 in the beam. (Example:

Fasten it to a measuring rod, bring the
HL750 into the laser be am. You now ha ve
5 second s to plum b the rod and get t he
reading captured.)

The beep er will
chirp ra pidly aft er
approxim ately 5

seconds to confirm
beam capture. A flashing
display will also indicate
the read ing has b een
captured

.

+

1 x quick

Special Menu Functions

RDIO Radio Functions - MODE - PAIR - TEST
SENS Sensitivity Medium*-High-Low
AVG Averaging algorithm Medium*-High-Low
D.R.O. Numeric display ON*-OFF-.1mm
UNIT Units of measure MM*-CM-IN-FRAC-FT
FRC.R. Fractional Reduction ON*-OFF
ARRW Arrow Display DB*(deadband)-PR (prop.)
O.O.B. Out-of-Beam Display ON*-OFF
GRD.A. Grade Alarm ON-OFF*
A.S.O. Automatic shutoff 0.5h*-24h-OFF
TX.O.L. Transmitter Out-of-Level OFF*-RPS
TX.O.B. Transmitter Low Battery OFF*-RPS
INFO Information about the Laserometer
* Default setting

(for 2 Sec., then RDIO)

Press swit ches
together for 2 sec

.

1. Scrolling up or down.

How to change Menu functions:

2. Enter Change mode.

3. Change selected items

.

4. Confirm change.

5. To Exit.

or

+

Automatic Shutoff
A.S.O. (Automatic Shut Off):

0.5 - After 30 Minutes*
OF - Off (Unit is permanently on.)
24 - 24 hour shutoff.

Out-of-Beam Display
O.O.B. (Out-of-Beam Disp lay):

Sequence t o show direc tion to get back in
the laser beam ( for 25 s)
ON - Out-o f-Beam Displ ay ON*
OF - Out-of-Beam Display OFF

Grade Alarm
GRD.A. (Grade Alarm):

When turne d ON, disabl es the audi ble
signal whe n on-grade. When moved out
of the on- grade deadba nd, the bee per
activates as normal:
ON - Alarm on (Solid beeper OFF)
OF - Alarm off (Solid beeper ON)*

Sensitivity of reception
SENS (Sensitivity):

Selects re ception sens itivity to laser and
other light sources.

MD - Medium*: for most applications.
HI - High: When laser beam is

weak, or at very long distances.
LO - Low: I f outside so urces are
disturbing elevation readings

.

Action Display Remarks

Initialization:

1. Test of LCD, LED and beeper

2. CAL: Calibration (3 sec.)

3. Unit is ready for use.

(Do not power up the unit i n a laser beam
or strob e. If det ected, the unit wil l display
“E200” and revert to the previous
calibration.)

The select ed unit of m easure dete rmines
the displayed deadband (accuracy).

The curren t accuracy i s stored in memory
and will be retained when the unit is turned
off or when batteries are replaced.

The current beeper
volume i s stored in
memory and will be
retained when the unit is
turned off or when bat­teries are replaced.

The curren t unit of me asure is st ored in
memory and will be ret ained when the unit
is turned off or when batteries are replaced.

The curren t brightness of LEDs
is stored in memory an d will
be retaine d when the u nit is
turned off or when batteries are
replaced.

Action Display Remarks

Accuracy in mm:

0.5 1.0 2.0 5.0 10.0

Beeper

Loud

Beeper
Medium

Beeper

Low

(No symbol)

mm - cm - in - frac - ft

LEDs
Bright

LEDs

Dim

LEDs
OFF

(No symbol)

1

2

3

Turn power ON/OFF

Press to turn pow er ON. Pre ss and ho ld
for 2 seconds to turn power OFF.

Press once to display current setting;
push again to scroll through options.

Press together to cycle the selection.

+

Press once to display current setting,
additional pushes to scroll through options.

Select accuracy

Select beeper volume

Select units of measure

Select brightness of LEDs

CAPTURE Function

Press once to change current setting
(A beep confirms the selected volume.)

Beeper

Off

Special Menu Functions

RDIO (Radio) - Selects the 2-way radio operating conditions.

 MODE -
 OF – Off, No radio operation
 GL – Grade Laser, radi o is set to operat e with a GL5X2 gra de laser
(see the GL5X2 operator’s manual for using these features)
 HL – Handheld Laserometer, the 2-way radio is set to operate with another HL750

 PAIR - Configures the radio to work with a specific GL5X2 grade laser or HL750 Laserometer.
(requi red only once for e ach devic e)
Identification code of the paired device is stored in memory.

 TEST - Displays the value of communication packets (Service Use Only)

Remote Operation with Two HL750’s / HL750U’s

The HL750 can remotely display another HL750’s elevation information up to 80 m (260 ft) away.

RADIO Function

For more information about special
Menu Function contact the manufacturer,
importer or your local dealer

.

NOTE: The CAPTURE function is disabled
when the HL750 is radio linked and operating
with a paired device.

Special Menu Functions

Change special Menu Functions only in the case of special job requirements!

VH - Very High ( HL750U only ): for
extremely long distanc es. VH sho uld not
be used in doors, as it can cause false
signaling under fluorescent lights.