Instruction Manual FT3432 SOUND LEVEL METER 99 Washington Street Melrose, MA 02176 Phone 781-665-1400 Toll Free 1-800-517-8431 Visit us at www.TestEquipmentDepot.com October 2009 Revised edition 1 FT3432A981-01 09-10H...
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When you receive the instrument, inspect it carefully to ensure that no damage occurred during shipping. If damage is evident, or if it fails to operate according to the specifications, contact your dealer or Hioki representa- tive. Confirm that these contents are provided.
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FOR SAFETY In this manual, important safety instructions are specially marked as shown below. To prevent the risk of death or injury to persons and severe damage to the unit or peripheral equipment, make sure that all instructions are fully understood and observed. Important Disrega rd ing i nst r uct ions printed here incurs the risk of...
Precautions • Operate the unit only as described in this manual. • Do not touch any parts of the unit other than necessary for operation. • Do not drop the unit. Protect it from shocks and vibration. • The permissible environmental temperature range for operation of the unit is -10 to +50°C.
Outline This unit is a sound level meter that complies with the Japan measurement law, JIS, and IEC. The microphone is a 1/2-inch electret condenser (UC-52). It has a wide 107-dB linearity range, measuring sound levels between 30 and 130 dB, with no need to select the range.
Controls and Functions Front Panel Microphone Preampli er FT3432 SOUND LEVEL METER MODE key START/STOP MODE A/C/CAL A/C/CAL key START/STOP key MENU POWER key POWER Microphone/preamplifier Microphone and preamplifier are integrated in a single enclosure. An extension cable cannot be used.
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Side View Strap mount DC out connector External connector AC monitor output connector External connector This connector is composed of a DC out connector and an AC monitor output connector. (The connector can only be used for one purpose at a time.) DC out connector A DC signal corresponding to the sound level can be output from here.
Rear View Tripod mounting thread Battery compartment Tripod mounting thread Mount the unit on a camera tripod with this thread. Battery compartment Insert two size AAA (IEC R03, LR03) batteries here. Batteries Inserting the Batteries Important Make sure the unit is turn off before inserting the batteries.
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Important Take care not to reverse the (+) and (-) polar- ity when inserting the batteries. If batteries are inserted with wrong polarity, the unit will not operate. Always use two identical batteries, and replace batteries only as a set. Mixing battery types or old and new batteries can lead to damage.
Windscreen Fall out prevention Turn the fall out rubber prevention rubber only in this direction. NL-27 SOUND LEVEL METER START/STOP MODE A/C/CAL MENU FT3432 SOUND LEVEL METER POWER...
Silicon cover The silicon cover protects the unit from shocks and also makes it easier to grip when held. Fit it to the unit with the windscreen removed, as shown in the following diagram. Note You cannot use external connector when the silicon cover is fitted.
Hand strap To help prevent dropping of the unit, pass your wrist through this strap when holding the unit for measuring. Attach the hand strap as shown below. Strap mount Hand strap When you have not fitted the silicon cover POWER Silicon cover strap mount When you have fitted the silicon cover...
Connecting external equipment You can connect external equipment, such as a HIOKI Memory HiCorder to the external connector. Connect as shown in the following diagram. Note The connector has the ability to act as a DC out connector and an AC monitor output connector, but it can perform only one of these functions at a time.
State transition diagram (functions and operation keys) Startup Power on Processing screen Measurement START/STOP key screen START/STOP key, or Frequency after the measurement weighting time has elapsed characteristic A A/C/CAL key Frequency weighting characteristic C A/C/CAL key Calibration screen Internal calibration Reduce volume with A/C/CAL key the START/STOP key...
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Pressing the MODE key in the measurement screen or processing screen changes the display in the following order. Cpeak only appears when peak range is selected. Cpeak Press and hold the Menu screen A/C/CAL Press and hold the Change the setting with the A/C/CAL START/STOP key or MODE key Range setting...
Measurement screen and processing screen Elapsed time Measurement time Address number Battery indica- Processing tion mark Bar graph, lev- el range scale Sound level Sound level under range overload indi- indication cation Processing re- Processing re- sult under range sult overload Processing re- indication indication...
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Processing result overload indication Appears during processing when the sound level exceeds the measurement range, and remains until the next process starts (when a processing result is shown). Level indication Shows the sound level (L ) and each processing result (L and L ) as digits.
Power on and off Press the POWER key for 0.5 seconds or more to turn the power on or off. Measurement Selecting frequency weighting characteristics In the measurement screen, press the A/C/CAL key to select either frequency weighting characteristic A or C. (See the state transition diagram on page 10) Processing (measurement) Press the START/STOP key to start the processing.
Calibration Internal calibration (calibration with an electronic signal) Calibration with the built-in oscillator (1 kHz, sinusoidal wave). In the measurement screen, press the A/C/CAL key to switch to the internal calibration screen. (See the state transition diagram on page 10) Internal calibration screen “Int”, “Cal”, and “94.0dB”...
Menu settings In the measurement screen, press and hold the A/C/CAL key to switch to the menu screen (not available during processing). Range setting Press the START/STOP key or the MODE key to select the fol- lowing range settings. Wide: Measurement range: 30 to 130 dB, L cannot Cpeak...
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Setting time weighting characteristics Press the START/STOP key or the MODE key to select the following settings. F (fast), S (slow) Press the A/C/CAL key to switch to the measurement time settings. Press and hold the A/C/CAL key to return to the measurement screen.
Sleep mode With the measurement screen being shown and no key is pressed for 10 minutes, the unit enters sleep mode and the sleep mode screen appears. Power consumption is 30% of normal in sleep mode. Situations where the unit will not enter sleep mode The unit will not enter sleep mode in the following situations, even if no key is pressed for 10 minutes.
Recalling stored data In the measurement screen (frequency weighting characteristic C), press the A/C/CAL key three times to show the recall screen (see the state transition diagram on page 10). The most recent processing result is shown. Measurement time Elapsed time Address Shows that this is the recall...
Initial setting values Measurement time 10 m (10 minutes) Time weighting characteristics F (Fast) Level range Wide Address Error When an error is displayed on the LCD screen, repair is neces- sary. Please contact your dealer or Hioki representative.
Specifications Applicable legislation The Japan measurement law - Sound level meter JIS C 1509-1:2005 Class 2 IEC 61672-1:2002 Class 2 CE Marking (EMC Directive 2004/108/ WEEE Directive Chinese RoHS (units shipped to China only) Measurement functions Processing type Sound level L Equivalent continuous sound level L Sound exposure level L Maximum Sound level L...
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Measurement frequency range 20 Hz to 8 kHz Reference frequency 1 kHz Reference sound pressure level 94 dB Frequency weighting characteristics A and C Time weighting characteristics F (fast) and S (slow) Level range Wide range 30 to 130 dB Peak range* 65 to 130 dB * Peak range is used when measuring peak sound level.
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Stored data can be viewed in the recall screen. DC out connector DC output: 3 V (full scale), 25 mV/dB Output impedance: 50 Ω Load impedance: 10 kΩ or more AC monitor output connector AC output: +600 mVrms 1 Vrms (at 110 dB) -400 mVrms (Upper limit: 1.8 Vrms)
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Environmental conditions for operation -10°C to 50°C (14°F to 122°F) 10% to 90% RH (No condensation) Environmental conditions for storage -10°C to 50°C (14°F to 122°F) 10% to 90% RH (No condensation) Dimensions Approx. 120 mm(H)×63 mm(W) ×23.5 mm(D) (4.72”(H)×2.48”(W)×0.93”(D)) Weight Approx.
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23.5 FT3432 SOUND LEVEL METER START/STOP MODE A/C/CAL MENU POWER Left Side View Front View Right Side View Rear View Dimensional Drawings Unit: mm...
Description Remark paragraph also Performance specifications General 5.1.4 Configuration & normal mode 9.2.1 b) Configuration of operation • FT3432 • WS-14 • Windscreen fall out prevention rubber • Silicon cover ( Attachments) Nor mal mode of operation Power on and off Unit powered 5.1.6 Models of microphone 9.2.1 c)
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5.1.13 Reference SPL 9.2.5 a), 94.0 dB reference level range, 9.3 a), b), Wide range Fig. 1 Reference Reference orientation, reference position of microphone. incidence direction and reference point position 5.1.14 Operating of the hold facility and Me a su rement: the means for clearing a display Maximum time- that is held.
(including the case response. reflection) - Case reflection and microphone Fig. 4 Influence of diffraction WS-14 on acous- Including values for expanded tic performance of uncertainties. FT3432 In 1/3 octave frequencies for 63 Hz to 1 kHz and 1/12 octave fre- quencies for 1 kHz to 16 kHz 5.2.7 Adjustment data for sound cali- 9.3 d) Tab. 2 Adjustment brator or electrostatic actuator data for sound cali-...
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5.6.3 Self-noise at the more sensi- 9.3 h) Dummy microphone tive ranges with dummy micro- (19 pF) phone Maximum value Equal to 5.6.1 Typical value A: 19 dB C: 24 dB Time weighting F and S 5.7.1 Description of time weightings 9.2.2 d) F, S that are provided 5 .
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5.15.7 Description of method for trans- 9.2.5 m) N/A ferring data to PC 5.16 Analogue and digital outputs 5.16.1 Electric output connector (AC 9.2.5 p) Frequency weight- output) ing: Z +600 mVrms 1 Vrms -400 mVrms (at 110 dB) Output range: 1.8 Vrms or less Output impedance: 600 Ω...
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5.18.2 Operating mode or highest radio 9.3 n) Operation mode: frequency emissions normal operation Connection pattern: Option cable 5.20 Power supply 5.20.2 Maximum and minimum power 9.3 j Maximum: 3.6 V supply voltage Minimum: 1.8 V 5.20.3 Battery types & battery life 9.2.3 a) Batteries 5.20.4 Operation from an external 9.2.3 c) power supply 5.20.5...
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Correction for use of microphone 9.2.6 b) cable Effect of optional accessories 9.2.6 a) Fig. 4 Influence of (windscreen) WS-14 on acous- tic performance of FT3432 Statement of conformance with Compliant with IEC optional accessories (wind- 61672-1 (JIS C 1509- screen) 1), with Windscreen WS-14 mounted Operation of 1/1 - 1/3 octave 9.2.6 c)
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9.2.2 b) Relative free-field response as Directional Charac- function of incidence angle and teristics with Hori- frequency (detailed tabular de- zont a l Di rect ion scription) (Fig. 6), Vertical Direction (Fig. 7) 9.2.2 c) Description of the frequency 5.1.10 Refer to 5.1.10 weightings 5.4.12 Refer to 5.4.12 9.2.2 d) Description of the time weight-...
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9.2.4 d) Data for correction - with and 5.2.4 - Refer to 5.2.4 - without windscreen - for : 5.2.5 5.2.5 - Deviation of average frequency response to uniform frequency response. - Case reflection and microphone diffraction Including values for expanded uncertainties. In 1/3 octave frequencies for 63 Hz to 1 kHz and 1/12 octave fre- quencies for 1 kHz to 16 kHz 9.2.5 Operating the sound level meter 9.2.5 a) Reference direction 5.1.13 Refer to 5.1.13 9.2.5 b) Procedure to measure sound,...
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9.2.5 j) Operation of the reset function or Measurement results and overload (measurement val- peak ues, overload indi- cation, under-range indication) are reset when a new measure- ment is started. Time required for measurement initial- ization: < 1 second 9.2.5.k) Operation & interpretation of 5.10.1 Refer to 5.10.1 overload indicators...
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Information for testing 9.3 a) Reference sound pressure level 5.1.13 Refer to 5.1.13 9.3 b) Reference level range 5.1.13 Refer to 5.1.13 9.3 c) Microphone reference point 5.1.13 Refer to 5.1.13 9.3 d) For A-weighted sound levels: 5.2.7 Refer to 5.2.7 Adjustment data for multi-fre- quency sound calibrator and/or electrostatic actuator 9.3 e) Nominal A-weighted sound lev- 5.5.9...
Reference incidence direction and reference point position Reference direction of incidence Reference point position Center of diaphragm plane Fig. 1 Reference incidence direction and reference point position Frequency Response The frequency response of a sound field microphone is ex- pressed as the frequency response in the reference direction of incidence (0º).
Effect of Windscreen WS-14 The windscreen WS-14 reduces measurement errors due to wind noise. The WS-14 characteristics are shown below. Frequency weighting A FT3432 With WS-14 Wind velocity (m/s) Frequency weighting C FT3432 With WS-14 Wind velocity (m/s) Fig. 3 Wind noise reduction effect...
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-0.5 -1.0 -1.5 -2.0 -2.5 -3.0 1 000 10 000 100 000 Frequency (Hz) Fig. 4 Influence of WS-14 on acoustic performance of FT3432 (Referenced to FT3432 characteristics)
The greatest susceptibility configuration for radio frequency fields FT3432 SOUND LEVEL METER Memory HiCorder, START/STOP MODE A/C/CAL MENU Option cable POWER FT3432 Polarization direction is parallel to drawing plane Antenna Operation mode: normal operation Connection pattern - Option cable Fig. 5 The greatest susceptibility configuration for radio frequency fields...
Statement of conforming to the basic statement Tab. 1 Statement of conforming to the basic statement Immunity to AC power The specification of IEC 61672-1 Class 2 is frequency fields satisfied Immunity to RF fields The specification of IEC 61672-1 Class 2 is satisfied Emissions The specification of IEC 61672-1 Class 2 is satisfied Adjustment data for sound calibrator Tab. 2 Adjustment data for sound calibrator...
Directional Characteristics The directional characteristics of FT3432 is a measure of its dif- fering sensitivity for sound waves arriving from various angles. Since the electret condenser microphone used in the FT3432 is a pressure-sensitive type, it should be equally sensitive in all directions. However, refraction and cavity effects cause a certain microphone directional response at high frequencies. Fig. 6 Directional Characteristics with Horizontal Direction 350° 0° 10° 20° 340° 330° 30° 320° 40° 310° 50° -5dB 300° 60° 500 Hz -10dB 290°...
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Tab. 4 Tab. 5 Directional Characteristics with Horizontal Directional Characteristics with Vertical Di- Direction rection Frequency [Hz] Frequency [Hz] 501 1000 1995 3981 7499 15849 501 1000 1995 3981 7499 15849 0º 0º 10º -0.07 -0.01 -0.08 -0.03 -0.05 -0.23 10º -0.02 0.00 -0.05 0.06 0.10 -0.40 20º...
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