Norsonic nor103 User manual

nor103
Sound Level Meter
QUICK GUIDE

This Quick Guide takes you thru all basics to get to know your Nor103 and to
perform your measurements. A complete electronic instruction manual can be
downloaded from norsonic.com
Table of Contents
Introduction ...................................................................................................................1
Overview .......................................................................................................................2
Getting started a Quick Guide ......................................................................................4
Measurement and processing screen ..........................................................................5
Recall............................................................................................................5
Delete All ......................................................................................................5

1
Quick Guide
Introduction
Nor103 is on of the smallest available Class 1 sound level meters that complies with
EN61672-1.Themicrophoneisa1/2-inchelectretcondenser.Ithasawide107dBlinearity
range, measuring sound levels between 30 and 130 dB, with no need to select the range.
The unit has an LCD panel and three operation keys, and is able to measure the
following:
• Sound level Lp
• Equivalent continuous sound level Leq
• Maximum sound level Lmax
• Sound exposure level LE
• C weighted peak sound level LCpeak
You can store up to 199 measurements on the instruments internal memory. It is
powered by two size AAA batteries. The main unit and preamplifier are a single unit,
so no microphone extension is possible.
Nor103 has the following two level ranges.
Wide range: This measures the range between 30 and 137 dB and allows simultaneous
measurement of Lp, Leq, Lmax, and LE.
Peak range: Limits the range to 65 to 137 dB, but along with the processing results (as
for wide range) also LCpeak is measured.
Resume function
At startup, the following settings maintain the same value they had when you last
turned the unit off.
• Measurement time
• Time weighting characteristics
• Level range
• Address indication
The following items have predefined settings upon startup.
• Frequency weighting characteristic A
• Display processing value type Lp

2
Nor103 Sound Level Meter
Overview
Microphone
A ½- inch electret condenser microphone.
Preamplifier
Preamplifier are integrated part of SLM.
POWER key
Press to turn the unit on and off.
START/STOP key
Press to start or stop processing. Also used to change setting values in the calibration
screen, menu screen, and recall screen.
MODE key
Changes the processing result display in the measurement screen and processing
screen. Also used to change setting values in the calibration screen, menu screen,
and recall screen.
A/C/Cal key
This key selects the frequency weighting characteristics, calibration screen and
recall screen. Press and hold the A/C/CAL key for 2 seconds to access the menu
screen.
Front Panel
START/STOP MODE A/C/CAL
POWER
MENU
Microphone
Preamplifier
START/STOP key
MODE key
A/C/CAL key
POWER key
START/STOP MODE A/C/CAL
POWER
MENU
Strap mount Hand strap
When you have not fitted the silicone cover

3
Quick Guide
Tripod mounting thread
Mount the unit on a camera tripod with this thread.
Battery compartment
Insert two size AAA (IEC R03, LR03) batteries here.
Rear view
Batteriy charge status indicator
When the indicator starts to flash, correct measurement is no longer possible.
Replace the batteries with fresh ones.
If left inactive for more than 10 minutes, the unit will enter in sleep mode or energy
saving mode displaying SLP on the screen.
IMPORTANT: Make sure the unit is turned off before inserting batteries.
Use only identical batteries, and replace batteries as a set. Mixing types and/or old
and new can lead to damage.
IMPORTANT: If the indicator starts flashing during processing, processing will end
at that point. You cannot start processing with the START/ STOP key when the
battery indication is flashing.
Tripod mounting thread
Battery compartment
Full charge Indicator flashing
(replace the batteries)

4
Nor103 Sound Level Meter
Getting started
Start up by pressing POWER.
Toggle measurement screens by pressing A/C/CAL.
- LAF
- LCF
- LCF Int Cal 94,0dB (Internal electronic calibration for microphone check)
- LCF Aco Cal (Acoustical calibration for class 1 calibration)
- RECALL (LAeq)
Wide Range (F/S): toggle with MODE; LAeq – LAF(/S) max - LAE – LAF(/S).
Peak (F/S): LAeq – LAF(/S) max – LAE – LC peak - LAF(/S).
Press A/C/CAL once and C weighted is chosen, LCeq - LCF(/S) max - LCE – LCF(/S).
Go to setup screen by pressing A/C/CAL for > 2 sec. when in LAF/LCF screen.
Toggle the options with MODE. Accept and toggle setup by A/C/CAL.
1 - Wide Range / Peak
2 - Fast (F) / Slow (S)
3 - Measurement time (1, 5 10 minutes & 1hour)
4 - Exit settings menu
Calibration
For a class 1 calibration, first go to LCF Aco Cal screen by pressing A/C/CAL. Place
an acoustic calibrator over the microphone. When stabilized adjust to the correct dB
using the up or down buttons (MODE or START/STOPP).
Start Measurement
When in LAF or LCF press START/STOP. The processing mark flashes during
processing. To interrupt measurement before time has elapsed again press
START/STOP. During measurement, you can toggle between functions by pressing
MODE.
Turn off by pressing POWER for more than 0,5 sec.
We recommend to always use the windscreen!

5
Quick Guide
Measurement and processing screen
* sequence number used for storing of measurement values.
Recall
Push START/STOP to go backwards (toggles between stored measurement
values) and MODE goes forward. Hold START/STOP to move fast backward and hold
MODE for fast increase (toggles between measurement numbers).
Delete All
When in recall menu hold A/C/CAL for more than 3 sec. ALL/CLR will flash on display.
Press START/STOP to accept cancellation and all stored data will be permanently
erased, or press A/C/CAL to abort operation.
Recall screenPeak range screen
Processing
mark
Processing result
under range
indication
Sound level
under range
indication
Frequency weighting
characteristics
Processing
result symbol
Time weighting
characteristics
Level indication
Bar graph, level
range scale
Processing
result overload
indication
Sound level
overload
indication
Battery
indication
Address number
Elapsed time
Measurement time

About Norsonic
Norsonic is a leading manufacturer of measurement solutions for sound and vibration
since 1967. Our vision is to supply our customers with the most innovative sound in-
strumentation of the highest quality.
Norsonic Calibration Laboratory is an international accredited laboratory. This ensures
that the quality of the measured values is at the highest possible level. Full test and
calibration in accordance with relevant international standards, are carried out before
the products leave the factory.
At Norsonic, we are proud to serve our customers and listen to their needs.
Norsonic AS, Gunnersbråtan 2, N-3409 Tranby, Norway
[phone] | [e-mail] | www.norsonic.com