SoundTestMaster - Sound level meters Laserliner - Free user manual and instructions

Product Type	Digital Sound Level Meter with dB A and dB C filters
Brand	Laserliner
Model	SoundTestMaster
Manual Measurement Ranges	30-80 dB, 40-90 dB, 50-100 dB, 60-110 dB, 70-120 dB, 80-130 dB
Automatic Measurement Range	30-130 dB
Accuracy	±1.5 dB (reference condition 94 dB/1 kHz)
Frequency Range	31.5 Hz to 8 kHz
Time Weightings	Fast (125 ms) and Slow (1 s)
Main Functions	dB A / dB C measurement, MAX function, memory recording (16,000 points), real-time data transfer via PC, DC/AC outputs
Internal Memory	16,000 measurement points
PC Interface	Opto-isolated RS232, cable included
DC Output	10 mV/dB, impedance ≈ 100 ohms
AC Output	0.70 Vrms at full scale, impedance ≈ 600 ohms
Power Supply	6 AA batteries (1.5 V) or 9 V DC power adapter ≥ 500 mA
Dimensions (W × H × D)	80 × 245 × 35 mm
Weight (with batteries)	350 g
Operating Conditions	0 °C to 40 °C, max RH 80 % non-condensing, max altitude 2000 m
Storage Conditions	-10 °C to 60 °C, max RH 80 %
Maintenance and Cleaning	Clean with a slightly damp cloth, no solvents. Remove batteries for prolonged storage.
Safety	Proper use, avoid mechanical stress, extreme temperatures, humidity. Keep out of reach of children. Follow EMC guidelines.
Spare Parts and Repairability	Windscreen included, transfer cable, calibration screw. Annual calibration recommended by Umarex-Laserliner service.
General Information	Instruction manual available in multiple languages. Complies with EU and UK. Mandatory recycling at end of life.

Frequently Asked Questions - SoundTestMaster Laserliner

How to turn on and off the SoundTestMaster?

Press the On/Off button (reference 2) to turn the device on or off.

How to switch between dB A and dB C filters?

Press the A/C button (reference 4) to switch between the A and C weighting curves.

How to use the MAX function?

Press the MAX button (reference 3). The display then shows the measured maximum value. Press again to deactivate.

How to set the measurement range?

Use the LEVEL buttons (reference 7) to manually select a range (e.g. 30-80 dB). Hold LEVEL ▲ to switch to automatic mode (30-130 dB).

How to choose between Fast and Slow time weightings?

Press the FAST/SLOW button (reference 5). Fast (125 ms) for fast signals, Slow (1 s) for slow signals.

How to record measurements in the internal memory?

Hold the RECORD button (reference 4) for 2 seconds to start recording. RECORD appears on the screen. Hold again for 2 seconds to stop.

How to transfer recorded data to a PC?

Install the software (link in the manual), connect the cable to the PC interface (reference 11) and to the PC. Hold the SEND MEMORY button (reference 12) for 3 seconds. SENDING MEMO is displayed.

How to clear the internal memory?

Hold the LEVEL ▲ button for 3 seconds. CLR appears. Then hold LEVEL ▼ for 3 seconds to confirm.

How to calibrate the sound level meter?

Use a sound level calibrator (94 dB/1 kHz). Set the range to 80-130 dB. If the display is not 94 dB, adjust using the calibration screw (reference 10).

Which batteries to use and how to replace them?

Use 6 AA 1.5 V batteries. Open the battery compartment, insert the batteries respecting polarity. Remove batteries for prolonged storage.

USER MANUAL SoundTestMaster Laserliner

Top-down view of a black electronic device with battery pack and external casing (no visible text or symbols)

2 ON / OFF

SoundTest-Master MAX 1 sec

SLOW 40:17:03:08 TIME 90 52.8 A dB LEVEL

Messbereich: Manuell
30 ... 80 dB 60 ... 110 dB
40 ... 90 dB 70 ... 120 dB
50 ... 100 dB	80 ... 130 dB
Messbereich: Automatisch
30 ... 130 dB

UNDER 80° SLOW OVER 130° 17:03:08 TIME LEVEL 52.8 A dB

40 introduced FAST 17:03:08 TIME 90 CLA A dB

SENDING 40:10:00:00 SLOW 90 17:03:08 TIME 52.8 A dB

Correction

14 Netzteilbetrieb

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Completely read through the operating instructions, the „Warranty and Additional Information” booklet as well as the latest information under the internet link at the end of these instructions. Follow the instructions they contain. These documents must be kept in a safe place and passed on together with the product.

Intended use

The sound level meter is used to measure sound level with the frequency weighting filters based on the standard curves dB A and dB C as well as two time weighting factors (fast/slow). An internal memory stores the data measured during long-term measurements and the internal interface enables real time logging on a PC.

General safety instructions

• The device must only be used in accordance with its intended purpose and within the scope of the specifications.
• The measuring tools and accessories are not toys. Keep out of reach of children.
• Do not expose the device to mechanical stress, extreme temperatures, moisture or significant vibration.
• The structure of the device must not be modified in any way.
• The device must no longer be used if one or more of its functions fail or the battery charge is weak.
• Please ensure compliance with the safety regulations set out by local and national authorities with regard to the correct and proper use of the device.

1 21 SENDING MEMO UNDER 40 FAST SLOW OVER 90 17:03:08 TIME 52.8 dB AC dB 171819 20 Laserliner 60 V endothel 52.8 dB SoundTest-Master 10-11 2 3 MAX LEVEL A/C RECORD FAST SLOW SIND DATA 6 8 9 DC AC DOW OUTPUT

1 Microphone/Wind guard

2 ON/OFF

3 Max. function

4 dB A, dB C/Record

5 Time weighting/Memory readout

6 Display lighting/Real time recording

7 Adjust measuring range

8 9 V DC power supply connection

9 DC/AC output

10 Calibration screw

1 PC interface

12 Data transfer

13 Analogue scale

14 Time weighting

15 Max. measuring range

16 dB A/dB C

17 Unit

18 Record measured values

19 Current measured value

20 Time

21 Min. measuring range

Laserliner

Safety instructions

Dealing with electromagnetic radiation

• The measuring device complies with electromagnetic compatibility regulations and limits in accordance with the EMC Directive 2014/30/EU which is covered by the Radio Equipment Directive 2014/53/EU.
• Local operating restrictions – for example, in hospitals, aircraft, petrol stations or in the vicinity of people with pacemakers – may apply. Electronic devices can potentially cause hazards or interference or be subject to hazards or interference.
• The measuring accuracy may be affected when working close to high voltages or high electromagnetic alternating fields.

1 Insert battery

Open the battery compartment and insert batteries (6 x type AAA) according to the symbols. Be sure to pay attention to polarity.

Top-down view of a black handheld device with battery modules and a partially visible card labeled 'Laserliner' (no readable text or symbols on the device body)

2 ON / OFF

30.0 dB SoundTest-Master SETUP MAX 1 sec

B Setting date/time (setup)

The current data and time should be set before using the device for the first time to ensure stored measured values are assigned for subsequent evaluation. Press and hold the "MAX" button while switching on. You can change the value with the "LEVEL" buttons and move to the next value with the "MAX" button.

Date format: Year/month/day. Switch off the device to store the setting.

SETUP MAX 17:03:08 TIME MAX LEVEL

4 Sound pressure level (dB)

This device registers sound in a similar way to the human ear. The integrated microphone receives the incoming sound waves and converts them into electrical signals. Human hearing involves specific auditory curves. The greater the sound pressure, the louder the sound is perceived to be. The higher the frequency, the higher the pitch of the sound is perceived to be. To ensure that measurements are aurally compensated, this measuring device is fitted with filters. The A-weighting (dB A) replicates the frequency response associated with human hearing and is used for the majority of industrial noise and environmental noise measurements.

The C-weighting is used in industrial measurements.

After switching on the device, correspondingly switch over the dB A/dB C weighting filter by pressing the "A/C" button.

40° undesetzen SLOW 90 17:03:08 TIME 52.8 AC dB A/C

Powerful wind noises (> 10m/s) can affect the measured value. In such cases, you should use the wind deflector supplied with the product.

Sound source Sound pressure level in dB (A)

Auditory threshold	0
Quiet residential area	30 to 40
Low-level conversation, quiet office	40 to 50
Normal conversation	50 to 60
Heavy road traffic	70 to 80
Shouting, screaming	80 to 85
Pneumatic hammer (10 m away)	90 to 100
Start-up of a jet aircraft (100 m away)	120 to 130
Pain threshold	140

5 Measuring range

Select the corresponding measuring range in the device to achieve the required degree of accuracy of measurement results. In addition to the option of selecting the measuring range manually, the device also features an automatic range detection function. You can set the required measuring range by pressing the "LEVEL" buttons. To set the automatic measuring range, press and hold the "LEVEL ▲" button until the measuring range 30...130 dB appears in the display.

SLOW 40 iunouinuui 90 17:03:08 TIME 52.8 A dB LEVEL

Measuring range: Manual
30 ... 80 dB 60 ... 110 dB
40 ... 90 dB 70 ... 120 dB
50 ... 100 dB 80 ... 130 dB
Measuring range: Automatic
30 ... 130 dB

UNDER 80° SLOW OVER 130° 17:03:08 TIME LEVEL 52.8 A dB

The following alert is shown on the display when the measured values are outside the preset measuring range:

UNDER	The measured value is below the measuring range. Correct the measuring range downward.
OVER	The measured value is above the measuring range. Correct the measuring range upward.

Use the automatic measuring range to gauge the corresponding range. Then switch over to the determined manual measuring range as greater accuracy is achieved in this range. Ideally, the measured value should be in the middle of the defined measuring range.

6 Time weighting (FAST/SLOW)

FAST SLOW 40 dB 17:03:08 TIME 52.8 A dB FAST SLOW

The device features two different measuring intervals. "FAST" time weighting should be set for signals that change quickly. "SLOW" time weighting should be set for continual signals that change slowly. The "FAST" measuring interval is 125 milliseconds while the "SLOW" measuring interval is 1 second. The time weighting can be changed at any time during the measurement by pressing the "FAST/SLOW" button.

Always make sure the time weighting is set correctly to match the signal to be measured. If "SLOW" weighting is used for signals that change fast the measurement result may be falsified as peak levels may not be recorded.

7 MAX function

The MAX function is activated by pressing the "MAX" button. The measured value currently displayed corresponds to the largest measured value. Lower measured values are not displayed. Press the "MAX" button again to deactivate the function.

8 Record measured values (RECORD)

An internal memory makes it possible to record measured data during a measurement session. The stored data can be read out for subsequent evaluation. The memory can hold up to 16,000 measurements. Press the "RECORD" button for 2 seconds to start recording. "RECORD" appears at the bottom of the display. Press the button again for 2 seconds to stop recording. "FULL" is shown on the display as soon as the memory in the device is full.

A/C ● RECORD ↑ 2 sec UNDER 40 °C SLOW OVER 90 17:03:08 TIME 52.8 A dB RECORD

Do not start measurement recording before the device has been securely set up and adjusted. Measurements may be falsified if settings are changed during recording.

The internal storage space is limited to 16000 measuring points; longer measurements can be carried out in real time with the Windows application.

9 Clear memory

Press and hold the "LEVEL ▲" button for 3 seconds to completely delete the data in the memory. "CLR" appears on the display. Press and hold the "LEVEL ▼" button for 3 seconds to confirm that you wish to delete the data. The "CLR" display then flashes for a short time. The delete operation is concluded as soon as the normal display view appears again.

40:intubated FAST 17:03:08 TIME 90 CLA dB

10 Transfer stored data (SEND MEMORY)

The software must be installed on your PC before the data can be read out. To do this, follow the instructions at https://packd.li/ll/stm/ap/wi, start the installation program and follow the installation routine.

After successful installation, start the application. Then connect the supplied transfer cable to the PC interface on the device. Connect the other end of the cable to a free port on your PC. Press and hold the "SEND MRMORY" button for 3 seconds to transfer the data. "SENDING MEMO" appears on the display and goes out again as soon as data transfer has been completed.

SENDING MEMO 40 introduction SLOW 90 17:03:08 TIME 52.8 A dB

If the whole measurement memory is transferred to the PC, the entire transfer can take a long time. The connection to the PC is made via an optically decoupled interface to prevent interference during real-time transmission, meaning that only moderate data transfer rates can be achieved.

80° 745° 180 00:00:00 THE 188.8 dB START Cancel OK Cancel Cancel OK Cancel Cancel

11 Real time recording (SEND DATA)

It is possible to transfer the data to the PC in real time when conducting extensive measurements where there is not sufficient space in the internal memory for the recorded data. Data storage takes place directly at the PC. The measured data can also be displayed and observed directly on the PC monitor.

SENDING SLOW 40 (moderate) 90 17:03:08 TIME 52.8 A dB

Connect the device to the PC as described under Point 10 and start the program. Press and hold the "SEND DATA" button for 3 seconds to start data transfer. "SENDING" appears on the display. All recorded data are now shown in real time on the PC. Press the "SEND DATA" button again for 3 seconds to stop data transfer.

12 DC/AC output

The device is equipped with analogue signal outputs. The dB A or dB C signal is output via the CD output for connection to a chart recorder for instance. The unfiltered signal that is recorded directly from the microphone is made available at the AC output for a possible connection to an oscilloscope.

DC AC OUTPUT

Laserliner

13 Calibration and adjustment

The calibration can be checked by means of a sound pressure level calibrator in accordance with IEC/EN 60942:2003ff. The calibrator defines a target volume of 94 dB. The device should be checked in the 80...130 dB setting and show 94 dB plus the tolerance range on the display. If the displayed value deviates from the target volume, you can adjust the sound level meter to the required 94 dB by means of the calibration screw.

Centricle R-100

14 Power pack operation

It is recommended to operate the device with a controlled power pack (9 V, > = 500 mA DC, DC power plug 3.5 x 1.3 mm). High quality control and filtering of the power pack is required in order to rule out possible interference on the measurement signal (ripple <= 100 mV).

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15 Mounting on tripod

For certain measuring tasks it may be of advantage to secure the device on a tripod. To do so, screw the device on to a tripod with a 1/4" connection. Undo the device by turning in anticlockwise direction.

Information on maintenance and care

Clean all components with a damp cloth and do not use cleaning agents, scouring agents and solvents. Remove the battery(ies) before storing for longer periods. Store the device in a clean and dry place.

Calibration

The meter needs to be calibrated and tested on a regular basis to ensure it produces accurate measurement results. We recommend carrying out calibration once a year. Contact your distributor or the UMAREX-LASERLINER service department.

Technical data (Subject to technical modifications. 23W23)
Manual measuring range 30 dB ... 80 dB	40 dB ... 90 dB50 dB ... 100 dB60 dB ... 110 dB70 dB ... 120 dB80 dB ... 130 dB
Automatic measuring range 30 dB ... 130 dB	dB
Accuracy ± 1.5 dB (reference condition 94 dB / 1 kHz)
Dynamic range 50 dB
Test condition 94 dB, 1 kHz sinusoidal signal
Frequency range 31.5 Hz ... 8 kHz
Measuring interval Fast: 125 ms, Slow: 1 s
Resolution of digital display 0.1 dB, Measuring rate: 2 measurements/second
Resolution of analogue display 1 dB, Measuring rate: 20 measurements/second
Microphone Electret microphone
Data memory 16,000 measurements
AC voltage output 0.70 Vrms at full deflection, approx. 600 ohm output impedance
DC voltage output 10 mV/dB, approx. 100 ohm output impedance
Interface Optoinsulated RS 232
System requirements Windows XP / Vista / 7 / 8 / 10 / 11, 32bit / 64bit
Power supply	6 x 1.5 V AAA
Power pack connection	DC 9V ≥ 500 mA (ripple < 100 mV)
Operating temperature	0°C ... 40°C, max. humidity 80% rH, no condensation, max. working altitude 2000 m above sea level
Storage temperature -10°C ... 60°C, max.	humidity 80% rH
Dimensions (W x H x D)	80 x 245 x 35 mm
Weight (including batteries)	350 g

EU and UK directives and disposal

This device complies with all necessary standards for the free movement of goods within the EU and the UK.

This product, including accessories and packaging, is an electrical appliance that must be recycled in an environmentally appropriate manner in accordance with European and UK directives on waste electrical and electronic equipment, batteries and packaging, in order to recover valuable raw materials.

Further safety and supplementary notices at:

https://www.laserliner.com

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Top-down view of a black handheld device with battery pack and external label (no readable text or symbols)

2 ON / OFF

SoundTest-Master SETUP MAX 1 sec

90 w/ulbered FAST 17:03:08 TIME 90 CLA A dB

RS-132 Correction

14 Netadaptervoeding

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Top-down view of a black handheld device with battery pack and external label (no readable text or symbols)

2 ON / OFF

SoundTest-Master SETUP MAX 1 sec

40 (intels/ohms) SLOW 90 17:03:08 TIME 52.8 AC dB

Correction

Close-up of a black remote control panel with indicator lights and a pointing arrow (no text or symbols on the panel itself)

Top-down view of a black handheld device with battery pack and external label (no readable text or symbols)

2 ON / OFF

SoundTest-Master SETUP MAX 1 sec

FAST SLOW 40 (induction) 90 17:03:08 TIME 52.8 A dB FAST SLOW

SENDING MEMO 40 lmachmout SLOW 90 17:03:08 time 52.8 A dB

Digital Inverter Audio 10.1 COMPART 80 FAST 180 00:00:00 TIME 188.8 dB START Computer App 10.1 Settings Timing Preview

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Correction RS-32

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Top-down view of a black handheld device with multiple battery modules and a label reading 'Laserliner' (no visible text on device body)

2 ON / OFF

SoundTest-Master SETUP MAX 1 sec

40 subhatched FAST 17:03:08 TIME 90 CLA A dB

Digital Signal Display 60° 745° 180 00:00:00 tms 188.8 dB START Cancel Control Panel 1 Control Panel 2 Control Panel 3 Control Panel 4 Control Panel 5 Control Panel 6 Control Panel 7 Control Panel 8 Control Panel 9 Control Panel 10 Control Panel 11 Control Panel 12 Control Panel 13 Control Panel 14 Control Panel 15 Control Panel 16 Control Panel 17 Control Panel 18 Control Panel 19 Control Panel 20 Control Panel 21 Control Panel 22 Control Panel 23 Control Panel 24 Control Panel 25 Control Panel 26 Control Panel 27 Control Panel 28 Control Panel 29 Control Panel 30 Control Panel 31 Control Panel 32 Control Panel 33 Control Panel 34 Control Panel 35 Control Panel 36 Control Panel 37 Control Panel 38 Control Panel 39 Control Panel 40 Control Panel 41 Control Panel 42 Control Panel 43 Control Panel 44 Control Panel 45 Control Panel 46 Control Panel 47 Control Panel 48 Control Panel 49 Control Panel 50 Control Panel 51 Control Panel 52 Control Panel 53 Control Panel 54 Control Panel 55 Control Panel 56 Control Panel 57 Control Panel 58 Control Panel 59 Control Panel 60 Control Panel 61 Control Panel 62 Control Panel 63 Control Panel 64 Control Panel 65 Control Panel 66 Control Panel 67 Control Panel 68 Control Panel 69 Control Panel 70 Control Panel 71 Control Panel 72 Control Panel 73 Control Panel 74 Control Panel 75 Control Panel 76 Control Panel 77 Control Panel 78 Control Panel 79 Control Panel 80

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SENDING 40:17:03:08 SLOW 90 17:03:08 TIME 52.8 A dB

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40 -intercathode SLOW 90 17:03:08 TIME 52.8 AC dB A/C

SENDING 40 [induction] SLOW 90 17:03:08 TIME 52.8 A dB

RS-132 Correction

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Top-down view of a black handheld device with battery pack and external circuit board (no visible text or symbols)

2 ON / OFF

SoundTest-Master MAX 1 sec

3 Ajustar data / hora (Setup)

40:17:03:08 SLOW 90 17:03:08 TIME 52.8 A C dB A/C

SLOW 40:17:03:08 17:03:08 TIME 90 52.8 A dB LEVEL

40 Intubated FAST 17:03:08 TIME 90 CLA A dB

SENDING MEMO 40 indolubation SLOW 90 17:03:08 TIME 52.8 A dB

Correction

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2 ON / OFF

SoundTest-Master MAX SETUP 1 sec

40° industrial SLOW 90 17:03:08 TIME 52.8 A C dB A/C

SLOW 40:17:03:08 TIME 90 52.8 A dB LEVEL

Mätområde: Manuell
30 ... 80 dB 60 ... 110 dB
40 ... 90 dB 70 ... 120 dB
50 ... 100 dB 80 ... 130 dB
Mätområde: Automatiskt
30 ... 130 dB

UNDER 80° SLOW OVER 130° 17:03:08 TIME LEVEL 52.8 A dB

40 introduced FAST 17:03:08 TIME 90 CLA A dB

SENDING MEMO 40:17:03:08 SLOW 90 17:03:08 TIME 52.8 A dB

Digital Signal Time Display COMPORT 80° 745° 180° 00:00:00 TIME 188.8 dB START OK Cancel Balance Finish Help

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SENDING SLOW 40 lmvalental 90 17:03:08 TWE 52.8 A dB SEND DATA 3 sec

Correction RS-23

14 Nätadapterdrift

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2 ON / OFF

SoundTest-Master MAX 1 sec

Correction

Close-up of a black camera control panel with buttons and an arrow pointing to the right side (no text or symbols on the panel itself)

Interior view of a modern industrial facility with robotic arms and a digital thermometer (no visible text or symbols)

Industrial CNC machine tool in operation with a digital display showing 92.6% speed (no text or symbols on the machine itself)