meter measures more than 126 dB in Range 120, the level during a one-second sampling period and n Notes: Setting the Meter 126 number and the bar graph flash. updates the number on the display once a second. • If you change the RANGE setting during an integrated Setting the Weighting If you get the overrange indicator, try a higher range 4. After the measurement, set RANGE to OFF. average measurement, you clear any stored data and a setting until you get a reading in the upper half of the continuous average or maximum measurement resumes. Press WEIGHTING to select A or C. range (0 to +10 dB). Taking Maximum Measurements • You must repeat the procedure for taking an integrated Weighting determines the meter’s frequency response average measurement. curve. Underrange Indicator 1. Follow Steps 1-3 in “Continuous Average Measurements”. Taking Maximum and Minimum Measurements A-weighting has A-curve frequency characteristics and 2. Press MAX; the word MAX appears. When the measured sound level is lower than the during an Undetermined Time Period causes the meter to respond mainly to frequencies lowest sound level of the selected range, LO appears The meter displays only the loudest measured ranging from 500 to 10,000 Hz. This is the human ear’s and the bar graph disappears. If this happens, try the sound level during the one-second sampling 1. Press RESET during a continuous average or most sensitive range. Select A to determine the next lower range. period. The bar graph shows the maximum level of maximum measurement. At the end of the desired level of an area. every 0.2 or 0.5 seconds. time period, press DH. DH displays. n Notes: C-weighting has C-curve (flat) frequency characteristics The bar graph segment that corresponds to the 2. Press MAX and MIN respectively to check the • The overrange or underrange indicator can also appear and causes the meter to respond mainly to frequencies when you recall a reading using the measurement peak reading stays on the display for 2 seconds or average, maximum (MAX stops flashing), and ranging from 32 to 10,000 Hz. Select C to measure holding function and the measurement is under or over until the meter measures a higher maximum level. minimum (MIN stops flashing) sound levels during sound levels of musical material. the time period. the selected range. 3. Press MAX again to cancel the continuous n Note: You can change the weighting setting only during • The meter can measure sound levels only from 50 to 126 dB. maximum measurement. A continuous average 3. Press RESET to resume a continuous average or a continuous average or maximum measurement. measurement resumes. maximum measurement.

Setting the Response Time Integrated Average Measurements Checking Stereo System Press RESPONSE to select FAST or SLOW. Follow these steps to monitor the sound level and To check the sound of a stereo system, use an audio When set to FAST, the meter updates the bar graph average the measurement over a period of 1 to 199 sample that produces pure tones, one at a time, at every 0.2 seconds. When set to SLOW, the meter seconds. The meter stores the average, maximum, and intervals that span the entire audio spectrum. Use updates the bar graph every 0.5 seconds. minimum sound levels during the set time. C-weighting with either slow or fast response. Make a graph or table to show the sound level Note: You can change the response setting only during n each tone produces. This gives you a clear idea of a continuous average or maximum measurement. the frequency response of the total audio system, Taking Measurements including the room. To smooth out the response, adjust the tone control, change speaker placements, Continuous Average Measurements and use a frequency equalizer. Follow these steps to measure the average sound Holding Measurements level. You can store the current measurements in memory 1. Set RANGE to the desired range setting. If the Press and hold DH for about 2 seconds during a and freeze measurements on the display. The meter sound level is very high, start at the highest range 1. continuous average or maximum measurement. stores the average, maximum, and minimum sound setting (120) and reduce the setting until you get a The digit 1 appears. levels for the last one second. reading. Press (or press and hold) MAX or MIN to set a 1. Press DH during a continuous average or maximum Understanding Indications There are seven ranges. Each covers 20 dB. The 2. period from 1 to 199 seconds; position the meter measurement. DH displays and the last average or number of a range represents the center of the for the measurement. maximum measurement is frozen. Level Indicator range. When the measured value is lower or higher For an average measurement, what is frozen is the than the set range, an underrange or overrange 3. Press RESET to start the monitoring. 2. The meter displays sound level using a number and a indicator appears. See “Underrange Indicator” last average reading. Press MAX to check the last The meter updates the current integrated average bar graph. The number shows the sound level in dB and “Overrange Indicator” on this page. Take maximum measurement. MAX displays. Press MAX display once a second. MIN and MAX flash until the within ±10 dB of the selected range and is updated measurements at several different points in the area again to return to the average measurement. set time is up. When the set time is up, DH appears, once a second. to get a good average. and MIN and MAX go on flashing. The meter displays For a maximum measurement, what is frozen is the The bar graph’s center point represents the midpoint last maximum reading. Notes: the total integrated average sound level. of the selected range (for example, for Range 70, the n 3. Press MIN to check the last minimum measurement. center point represents 70 dB). The bar graph updates • If you set RANGE to 120, the meter measures sound 4. Press MAX to display the maximum sound level MIN displays. Press MIN again to return to the every 0.2 seconds or 0.5 seconds. levels from 110 to 126 dB. for the set time, press again to return to the total average or maximum measurement. • If you change the range setting during a integrated average sound level. measurement, you clear all the current data and a Overrange Indicator Press MIN to display the minimum sound level 4. Press RESET to return to the continuous average or continuous average measurement resumes. maximum measurement. When the sound level is higher than the highest for the set time, press again to return to the total 2. Set the weighting and response (see “Setting the number in the selected range, the bar graph goes to integrated average sound level. n Note: When you set RANGE to a different range during Weighting” and “Setting the Response Time” on this + 10 dB and both the bar graph and the number that 5. Press RESET after you check the average, maximum, measurement holding, you disable the holding function and page). return to a continuous measurement. represents the next range flash. and minimum sound levels. A continuous average or For example, if the meter measures 91 dB in Range 3. Point the meter’s at the sound source. maximum measurement resumes. 80, then the number 90 and the bar graph flash. If the The meter displays the continuous average sound

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33-2055 RC_En.111208.indd 1 12/05/2008 9:59:47 Digital Care and Service Limited Warranty User’s Guide 33-2055 • Keep your meter dry and clean. If it gets wet or dirty, RadioShack warrants this product against defects in wipe it dry or clean immediately. Do not use harsh materials and workmanship under normal use by the chemicals, cleaning solvents, or strong detergents to original purchaser for ninety (90) days after the date of clean the meter. purchase from a RadioShack-owned store or an authorized Thank you for purchasing your Digital Sound Level Meter from RadioShack. Please read this user’s guide before RadioShack franchisee or dealer. RADIOSHACK MAKES installing, setting up and using your new meter. • Use and store the meter in normal temperature NO OTHER EXPRESS WARRANTIES. environments only. Temperature extremes can shorten This warranty does not cover: (a) damage or failure the life of electronic devices and distort or melt plastic caused by or attributable to abuse, misuse, failure to parts. follow instructions, improper installation or maintenance, 1 Install the battery alteration, accident, Acts of God (such as floods or • Handle the meter gently and carefully. Dropping it can lightning), or excess voltage or current; (b) improper or 1. Set RANGE to OFF. damage the circuit boards and cause the meter to work incorrectly performed repairs by persons who are not a Microphone improperly. RadioShack Authorized Service Facility; (c) consumables 2. Remove the battery compartment cover by pressing • Modifying or tampering the meter’s internal such as fuses or batteries; (d) ordinary wear and tear or cosmetic damage; (e) transportation, shipping or insurance components can cause malfunction and might both side in and lifting the cover. costs; (f) costs of product removal, installation, set-up invalidate its warranty. If your meter is not performing service, adjustment or reinstallation; and (g) claims by 3. Install one 9V battery (not as it should, take it to your local RadioShack store for persons other than the original purchaser. included) as indicated by the assistance. Should a problem occur that is covered by this warranty, polarity symbols (+ and –). take the product and the RadioShack sales receipt as 4. Replace the cover. Specifications proof of purchase date to any RadioShack store in the U.S. RadioShack will, at its option, unless otherwise Battery...... 9V Alkaline provided by law: (a) repair the product without charge for Microphone...... Electret Condenser parts and labor; (b) replace the product with the same or 2 Set the sound range a comparable product; or (c) refund the purchase price. Tripod Adapter Range...... 50 to 126 dB All replaced parts and products, and products on which Set RANGE to the desired sound a refund is made, become the property of RadioShack. Mount the meter on a (¼–inch) tripod Accuracy...... ±2 dB at 114 dB SPL range. New or reconditioned parts and products may be used in to eliminate hand noise and minimize the performance of warranty service. Repaired or replaced Reference...... 0dB = 0.0002 Micro Bar If you cannot get a reading, try the effects of sound reflected from parts and products are warranted for the remainder of the other ranges until you get a your body. Weighting...... A and C original warranty period. You will be charged for repair or reading (refer to “Continuous Average replacement of the product made after the expiration of the Measurements” on Page 2). This makes it easy to use the meter Display Response...... Fast and Slow warranty period. with auxiliary recording or test Signal Output: RADIOSHACK EXPRESSLY DISCLAIMS ALL WARRANTIES equipment. AND CONDITIONS NOT STATED IN THIS LIMITED Voltage...... 1 Volt Peak-Peak Min. WARRANTY. ANY IMPLIED WARRANTIES THAT MAY BE 3 Set the weighting (Open Circuit, Full Scale at 1 kHz) IMPOSED BY LAW, INCLUDING THE IMPLIED WARRANTY OF MERCHANTABILITY AND, IF APPLICABLE, THE Press WEIGHTING to select A (on Impedance...... 10 Kohm Min. Load IMPLIED WARRANTY OF FITNESS FOR A PARTICULAR the display) to determine the noise PURPOSE, SHALL EXPIRE ON THE EXPIRATION OF THE Distortion...... Less than 2% at 1 kHz, STATED WARRANTY PERIOD. level of an area, or C to measure 0.5 V p-p Output sound levels of musical material. (Input: Mic Out, Output: 10 Kohm) EXCEPT AS DESCRIBED ABOVE, RADIOSHACK OUTPUT Jack 5 Read the measurement SHALL HAVE NO LIABILITY OR RESPONSIBILITY TO Refer to “Setting the Weighting” on Operating Temperature...... 32 to 122 °F (0 to 50 °C) THE PURCHASER OF THE PRODUCT OR ANY OTHER Use an audio patch cord Page 2. Hold the meter and point its PERSON OR ENTITY WITH RESPECT TO ANY LIABILITY, (not included) to connect to your Storage Temperature...... -40 to 149 °F (-40 to 65 °C) microphone at the sound source. LOSS OR DAMAGE CAUSED DIRECTLY OR INDIRECTLY stereo system or test equipment. BY USE OR PERFORMANCE OF THE PRODUCT OR The meter displays the continuous Dimensions (HWD)...... 6¼ × 2½ × 1¾ Inch 4 Set the response time average sound level. (159 × 64 × 44 mm) ARISING OUT OF ANY BREACH OF THIS WARRANTY, INCLUDING, BUT NOT LIMITED TO, ANY DAMAGES Weight (including battery)...... 6.7 oz (190 g) RESULTING FROM INCONVENIENCE AND ANY LOSS OF Press RESPONSE to set the After the measurement, set TIME, DATA, PROPERTY, REVENUE, OR PROFIT AND ANY response to FAST (on the display) RANGE to OFF. Specifications are subject to change and improvement INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL or SLOW. Refer to “Setting the without notice. Actual product may vary from the images DAMAGES, EVEN IF RADIOSHACK HAS BEEN ADVISED Response Time” on Page 2. found in this document. OF THE POSSIBILITY OF SUCH DAMAGES. Some States do not allow limitations on how long an implied warranty lasts or the exclusion or limitation of What’s Included • Selectable weighting for noise level • Use only a fresh battery of the incidental or consequential damages, so the above or musical sound required size and type. limitations or exclusions may not apply to you. This Digital Sound Level Meter warranty gives you specific legal rights, and you may also • Displays average or maximum • Dispose of old batteries promptly have other rights which vary from State to State. You may Carrying Case User’s Guide sound level and properly. Do not burn or bury Protect the environment. contact RadioShack at: • Integrated averaging from 1 to 199 them. Go to www.E-CyclingCentral.com to find a Features seconds • After using the meter, set RANGE RadioShack Customer Relations to OFF to save power. recycling location near you. 300 RadioShack Circle, Fort Worth, TX 76102 04/08 • For home/hobbyist use: fine tune • If you do not plan to use your meter your stereo, PA system, or home Battery Notes: for a long period, remove the theater • When BATT displays or the meter battery. Batteries can leak chemicals • Attaches to a tripod with ¼ inch stops operating properly, replace that may damage electronic parts. connector the battery. www.RadioShack.com

©2008. RadioShack Corporation. 12A08 AO0330AAA1 Page 4 All rights reserved. RadioShack and www.RadioShack.com are trademarks used by RadioShack Corporation. 33-2055 A Printed in China

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