Spectra QM55 Prospecto

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www.trimble.com/spectra

QM55 Quick Measure

Distance Meter 

User Guide

Thank you for choosing the Spectra Precision QM55 from the Trimble 

family of precision products. This easy-to-use distance measuring tool 

will allow you to measure distances quickly, accurately and reliably.
Before using the Quick Measure, read this operator’s manual carefully.  

Included is information about operation, safety and maintenance.
Ensure that the operating instructions are with the laser distance meter 

when it is given to other persons. 
Your comments and suggestions are welcome; please contact us at:
Trimble Spectra Precision Division

8261 State Route 235

Dayton, Ohio 45424  USA

Phone: 

+1 (937) 203-4419

   

+1 (800) 527-3771

Fax: 

+1 (937) 482-0030

Internet:  www.trimble.com/spectra

Single distance measurement
1) Switch on the device by pressing the ON button.
2) Press the ON button again to activate the laser.
3) Aim the laser do to the surface to be measured, and press the On 

button again. The measurement will be shown in the display
4) Press and hold the OFF Button to switch off.
Continuous measurement
1) With the device on, press and hold the ON Button for 2 seconds 

until the continuous measure icon appears to activate continuous 

measuring mode. The tool beeps during continuous measure mode if 

beeper is turned on.
2) Press the Measure Button again to stop continuous measure.
When continuous measure is stopped, the display will show:
•  Maximum distance
•  Minimum distance
•  Last distance
Continuous measure can be useful to find the shortest distance to a 

wall or longest distance to a corner as shown.

Protective 

overmolding

Liquid Crystal Display  

(LCD)

Power ON / Measure

Subtract next measure

Units of measure / 

backlight
Clear previous reading /  

OFF

Add next measure

Functions  

(area, volume, height)

Measure reference

Included with the QM55: Pouch, unit, battery, user guide,  

battery key/extension

Batteries - Installation
1. Open the battery compartment using the supplied battery key or a coin.
2. Remove the batteries from the packaging and insert them in the tool.
NOTE

 When installing batteries note the positive (+) and  

negative (-) markings on the housings
3. Close the battery compartment cover.

- Some areas have regulations regarding the disposal 

of batteries. Be sure to dispose of discharged batteries properly.
CAUTION:

 The batteries should be removed when storing the laser 

more than 30 days.

Laser on

Shows that laser is activated

Measure 

reference

Indicates measure reference from front, center,  

back, and back with extended key

Functions

Indicates functions: area, volume, indirect measure

Continuous 

Measure

Symbol flashes when in continuous measure mode

Signal 

strength 

indicator

More bars indicate strong signal, faster and more 

accurate measure. 

No bars indicate weak signal  - best to adjust 

conditions

Battery 

indicator

More bars indicate more battery power remaining 

Flashing indicates it is time to change batteries

Data storage Indicates historical reading being displayed. 50 is 

most recent. 1 is the oldest

Hardware 

error

Switch unit on/off several time.  If this symbol 

remains, contact your dealer

Clear button
Press the C/OFF button to clear the last reading or command. During 

area and volume measures, the C/OFF button clears the most recent 

measure, but preserves previous measures. 
Change reference
Default measure reference is the back of the unit. Press the MEASURE 

REFERENCE button to change to front, center or extended back with 

tail as shown on the icon.
Display backlight
Press the UNIT/LIGHT button to turn the back light on or off.
Setting unit of measure
Press and hold UNIT/LIGHT button until the units of measure

changes.  Press again to change to next unit of measure.  Unit of 

measure options are: m, ft, in, ft-in.

3rd prior measure

2nd prior measure

Previous measure

Current measure

Power ON

Long

Unit ON
Single measure

Short

Short

1 turn on laser

2 measure

Continuous measure

Long

Short to stop

Last screen shows

Maximum distance

Minimum distance

Last distance

Change measure reference

Short

Measure 

from back 

with 

extension

Measure from 

front

Measure 

from 

center

 

Measure from 

back

Measure from back is the default 

setting when turned on.

Turn on/off backlight

Short

Area

Short

Cycle function to: 

Measure as shown Result shows 2 measures and area

Volume

Short

Cycle function to: 

Measure as shown Result shows 3 measures and volume

Indirect single height

Short

Cycle function to:

Measure as shown Result shows 2 measures and distance

Indirect double height

Short

Cycle function to:

Measure as shown Result shows 3 measures and distance

Stake Out

Short

Cycle function to: 

Use + to select 

digit. Use - to 

change digits

Continuous measure;         

Beeps faster when near set value.

Addition

Short

Adds next measure

Subtraction

Short

Subtracts next measure

Units of measure change

Long

m, ft, in, ft-in

Cycle through units with long presses

Memory

Short

First clear screen measures

Press + or- to cycle through measures.  

Clear previous action

Short

Erase previous action

Power off

Long