Global GNV-100 User manual

User Manual
GNV-100
Sound Level Meter
Class 2

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Table of Contents
Safety..................................................................................................2
Compliance and Certications............................................................3
Features.............................................................................................4
Specications.....................................................................................5
Instrument Description.......................................................................6
Operating Instructions.....................................................................7-9
Warranty/Service Information..........................................................10
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Unauthorized duplication of Global Specialties documentation
materials is strictly prohibited. Customers are permitted to duplicate
and distribute Global Specialties documentation for internal
educational purposes only.
Power....................................................................................7
Max/Min Hold........................................................................7
Frequency Weighting............................................................7
Battery Replacement and Indicator.......................................8
Calibration.............................................................................8
Measurement........................................................................9
Operating Precautions...........................................................9

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2
Safety
To avoid personal injury and/or product damage, review and comply with
the following safety precautions. These precautions apply to both operating
and maintenance personnel and must be followed during all phases of
operation, service, and repair of this probe.
Dry Conditions
Hands, shoes, oor, and work bench must be dry. Avoid making
measurements under humidity, dampness, or other environmental
conditions that might affect safety.
Cleaning
Use a soft cotton cloth lightly moistened with a mild solution of
detergent and water. Do not allow any portion to be submerged
at any time. Dry thoroughly before attempting to make voltage
measurements. Do not use solvents or expose to solvent fumes as
they may cause deterioration or damage
Do not operate:
• In the presence of noxious, corrosive, flammable fumes,
gases, vapors, chemicals, or finely-divided particulates.
• In environments where there is a danger of any liquid being
spilled on the probe.
• In air temperatures exceeding the specified operating
temperatures.
• In atmospheric pressures outside the specified altitude limits or
where the surrounding gas is not air.

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Compliance and Certications
CE Compliance
This product meets the essential requirements of the applicable
European Directives as follows:
• 2014/30/EU: Electromagnetic Directive (EMC)
• 2011/65/EU: Restriction of Hazardous Substances
Directive (RoHS)
Safety
This product meets the follow standard(s) of safety for electrical
equipment for measurement, control and laboratory use:
• IEC/EN 61672-1:2013
Disposal
(Applicable in the European Union and other European
countries with separate collection systems). This
product is subject to Directive 2012/19/EU of the
European Parliament and the Council of the European
Union on waste electrical and electronic equipment
(WEEE), and in jurisdictions adopting that Directive, is
marked as being put on the market after August 13,
2005, and should not be disposed of as unsorted
municipal waste. Please utilize your local WEEE
collection facilities in the disposition of this product.
Caution! Refer to the operating instructions.

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Features
• Meets IEC 61672-1 Class 2 requirements
• Fast and slow time weighting
• 60 dB dynamic range
• A and C frequency weighting
• AC and DC outputs available from standard 3.5 mm coaxial socket for
use with a frequency analyzer, level recorder, FFT analyzer, etc..
• Min/max function
• Battery capacity indicator
• Analog bar graph and digital display
• Tripod mount for long term monitoring
• Includes windscreen, battery and hard carrying case

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Specications
Safety Standard Applied IEC 61672-1 Class 2
One 9 V battery, Instuction manual, windscreen,
carrying case
Operating Limits and Functions
Measuring Level Ranges Low: 30 to 90 dB
Med: 50 to 110 dB
High: 70 to 130 dB
Sample Rate Fast 125 ms
Slow 1000 ms
Accuracy ± 1.4 dB @ 94 dB, 1 kHz
Dynamic Range 60 dB
Frequency Range 20 Hz to 8 kHz
Frequency Weighting A / C
Microphone 1/2 Inch electret condenser
Displays
Digital Display 4 digit display
Resolution: 0.1 dB
Display Update: 0.5 sec
Analog Display 30 Segment bar graph
Resolution: 2 dB
Display Update: 100 ms
Alarm Functions OVER and UNDER alarm functions indicating
when sound level is outside the set range
Electrical Specifications
AC Ouput 1 Vrms at full scale
DC Output 10 mV/dB
Power Supply One 9 V battery: 006P, 6F22, NEDA 1604
Battery Life Approx. 50 hours
Environmental Specifications
Operating Temperature 0 to 40 °C (32 to 104 °F)
Operating Humidity 10 to 90% Relative humidity
Storage Temperature -10 to 60 °C (14 to 140 °F)
Storage Humidity 10 to 75% Relative humidity
Altitude Up to elev. of 2000 meters (~6,500 ft.)
Mechanical Specifications
Dimensions 258 x 55 x 25 mm (10.2 x 2.2 x 1.0”)
Weight Approx. 185g (6.5 oz)
Included Accessories

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Instrument Description
1. Windscreen
2. LCD display
3. Power button
4. Level range increase
5. Level range decrease
6. “A” or “C” freq. weighting
7. MIN/MAX hold button
8. Time weighting select
9. Microphone
10. AC/DC output terminal
11. Tripod mounting screw
12. Battery Cover
Auto power off
Under range indicator
Range Indicator
Reading Indicator
Battery capacity indicator A-Weighting indicator
Calibration
Mode indicator
Maximum/Minimum
Value hold indicator
Fast response indicator
Over range indicator
Slow response indicator
C-Weighting indicator

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Operating Instructions
Power
The key turns the sound level meter ON with a single push.
Press and hold the same button for 2 seconds to turn OFF the
power.
By default, when the meter is powered on, it is under auto power off
mode. The meter will shut itself down after 30 minutes if no key is
pressed. To disable this, press and hold until the symbol is
no longer visible.
Max/Min Hold
First adjust the meter to the correct level range and sample rate
prior to using this function. Press the Max/Min button to start the
maximum and minimum measurement mode.
1. Press the button once and “MAX” will display on the
screen. This indicates that the maximum value is being
updated and recorded.
2. Press again and “MIN” will display on the screen. This
indicates that the minimum value is being updated and
recorded.
3. Press once more and “MIN MAX” will blink on the display.
This indicates that both the minimum and maximum values are
being updated and recorded.
Frequency Weighting
A: Weighting for volumes below 50 dB (dBA)
C: Weighting for volumes above 50 dB (dBC)

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Battery Replacement and Indicator
Remove the battery cover from the back, and insert a 9 V battery.
The onboard display will indicate when the battery needs to be
replaced.
Calibration
1. First ensure that the device is turned off. Then press and
hold . Next, press the power button and release both.
The meter will display a ashing “CAL 94 dB”.
2. Gently insert the microphone housing into the calibrator* as
depicted below.
3. Press or to increase or decrease the number
displayed until it matches the value 94.0 dB
4. Press to nish calibration. To abort the process, press
the power button to cancel.
Batteries Good Batteries Partly Depleted Replace Batteries
9 V battery
*GNV-102 sound level callibrator sold separately

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Measurement
1. Turn on the meter and select the desired response time and
frequency weighting. If sound source consists of short bursts,
set response to “FAST”. To measure the average sound level,
use the “SLOW” setting.
Both Aand C weighting model how the human ear perceives
sound, dependent on frequency. A is best suited to volumes
below 50 dB and C for volumes above 50 dB.
2. Next select the desired decibel range.
3. Hold the instrument comfortably in hand or attach it to a tripod
via the tripod mount.
4. When “MIN MAX” (maximum and minimum hold mode) is
displayed, the instrument records and updates the maximum
and minimum noise level over long periods of time. Press
and hold for 2 seconds to clear the stored values.
5. Turn off the instrument.
Operating Precautions
• Wind blowing across the microphone will bring additional
extraneous noise and will be reduced by use of the provided
windscreen.
• Calibrate the instrument before operation if the instrument was
not in use for a long time or was operated near or beyond the
environmental limits.
• Do not store or operate the instrument in high temperature or
high humidity environments.
• Take out the battery and keep the instrument in low humidity
when not in use.