Trimble Inc. HL750 Manuel D’Utilisation

1. Pair the Two HL750’s 

(NOTE: The Pair operation is only required once)

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 down to PAIR function. ENTER to activate pairing. 

The PAIR symbol will rotate briefly until both units complete the PAIR operation. 

PAIR OK indicates function complete.

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 the SENSOR HL750 first. Mount at the desired elevation so that it can receive the laser beam.

Turn on the REMOTE DISPLAY / CONTROL PANEL HL750 second.

RMT.D – OK will be displayed. 

Press ENTER to operate this HL750 as the REMOTE DISPLAY / CONTROL PANEL.  

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

During REMOTE DISPLAY / CONTROL PANEL operation, RMT.D is displayed. The Unit will remotely 

display the elevation readings of the SENSOR, as long as the Antenna symbol shows the two are within 

radio range of each other: 40 - 100 meters (130 - 330 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 return to normal 

operation.

The current elevation read-

ing will be held. A flashing 

display will confirm the 

reading has been captured

.

1 x quick

B) HL750 is out of the laser beam and 

power is on:

A short intermittent 

beep (The beeper 

will turn on to Low if 

turned off.)

1.

Press any switch to return to normal 

operation.

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

HL750 into the laser beam. You now have 

The beeper will 

chirp rapidly after 

approximately 5 

seconds to confirm 

beam capture. A flashing 

display will also indicate 

the reading has been 

captured

.

1 x quick

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 switches  

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

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 Display): 

Sequence to show direction to get back in 

the laser beam ( for 25 s)

ON - Out-of-Beam Display ON* 

OF - Out-of-Beam Display OFF

Grade Alarm 

GRD.A. (Grade Alarm): 

When turned ON, disables the audible 

signal when on-grade. When moved out 

of the on-grade deadband, the beeper 

activates as normal:

ON - Alarm on (Solid beeper OFF)

OF - Alarm off (Solid beeper ON)*

SENS (Sensitivity): 

Selects reception sensitivity 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: If outside sources are 

 

disturbing elevation readings

.

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 in a laser beam 

or strobe. If detected, the unit will display 

“E200” and revert to the previous

calibration.)

The selected unit of measure determines 

the displayed deadband (accuracy).

The current accuracy is stored in memory 

and will be retained when the unit is turned 

off or when batteries are replaced.

The current beeper 

volume is stored in 

memory and will be 

retained when the unit is 

turned off or when bat-

teries are replaced.

The current unit of measure is stored in 

memory and will be retained when the unit 

is turned off or when batteries are replaced.

The current brightness of LEDs 

is stored in memory and will 

be retained when the unit is 

turned off or when batteries are 

replaced.

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

Press to turn power ON. Press and hold 

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.

Press once to change current setting

(A beep confirms the selected volume.)

Beeper 

Off

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

MODE - 

  OF –  Off, No radio operation

  GL –  Grade Laser, radio is set to operate with a GL5X2 grade 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.  

 

Identification code of the paired device is stored in memory.

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

The HL750 can remotely display another HL750’s elevation information up to 100 m (330 ft) away.

NOTE: The CAPTURE function is disabled 

when the HL750 is radio linked and operating 

with a paired device.