Casella-cel CEL-440 Manual de usuario

August 2002CEL-440 & CEL-480SOUND LEVEL METERSOperators Handbook060279/HB-07

instrument body. Face the red dot on the preamplifier to the front of theinstrument so that the key engages in a keyway in the socket to ensurecorrect

The instrument starts a series of self tests during which itindicates the instrument type, firmware version, preamplifiertype and interface status.At

sound level measurements. The main difference between the CEL-440and the CEL-480 is the additional timing facility built into the CEL-480.This allows

CEL-6726 dB21 or CEL-6727 dB22 Windows™ based software. Thissoftware has the facilities expected of fully featured Windows™packages offering post proc

Time: F (fast), S (slow), I (impulse),Q: 3, 4, 5, 6 energy conversion factor.Broadband models can measure all of the following parameterssimul-taneous

L Sound level, with current weightings (A and Fare shown),LMaximum level, with current weightings,LEquivalent continuous level, with currentfrequency

External power for the instrument is supplied via a 2.1 mm co-axial 2-lineD.C. connector in the bottom of the instrument case. Terminal polarity is+12

many operations are performed almost instinctively with a minimum oflearning time.Downloading is performed under the control of the PC. Datafrom each

Hints For Using Menus1. and displayed on amenu show which option keys are active.2. In general, and keys move thereverse video cursor from field to fi

2. PRELIMINARY OPERATIONS2.1 Select Instrument Configuration(Language, Microphone Response Etc.)Select the language in which the instrument will prese

Contents

CalibrationMemoryk-03SetupConfigure5/6LanguageBacklightk-04RS232 CommsTime & Date1/5Backlightk-05RS232 CommsTime & DateLanguage2/5Deutschk-06E

All of the configuration settings that have been left highlighted on themenu screens, plus any changes to the time and date, will be stored foruse nex

It is recommended that an acoustic calibration checkbe performed both before and after a measurement run.Perform the calibration check on the sound le

A Calibration screen is displayed at the end of the start upsequence and this will be the normal entry to the calibration check.However, after making

When the calibration check is complete, press once to obtain aMeasurement screen or twice to obtain the Main menu that givesaccess to all settings and

3. SELECT MEASUREMENT MODE& SETUP3.1 Select Measurement Mode(Bandwidth & CEL-480 Run Timing)The measurement mode specifies the bandwidth that

CalibrationMemorys-01Measure ModeSetup2/6CalibrationMemorys-02Measure ModeSetup1/6Third Octavess-03Single BandOctaves2/3s-04Duration TimerDelay TimerT

√√s-06Sync Timer XDuration ----1/2s-31Repeat 4Repeats-07T1 XT2 XT2 XT1 X ØØ/ØØ:ØØØØ/ØØ:ØØØØ/ØØ:ØØØØ/ØØ:ØØ1/14Select Mode & Setup

When the required measurement mode and timer settings have beenselected, press once to obtain a Measurement screen or twice toobtain the Main menu tha

the factory setup will be lost and the standard settings offered each timethe instrument is re-started. Select and save single band setups as follows.

Warnings !LOAD BATTERIES following the instructions given inSection 1.3. Make sure they are inserted in the orientationsshown inside the battery compa

s-332/3Third OctavesBroadbandOctavess-34Octave1KHzs-35(Octave)1KHzs-36(Octave)5ØØHzs-13Time Weight FPeak Weight ZExchange Q 3RMS Weight A1/4Select Mod

√s-14Time Weight FPeak Weight ZExchange Q 3RMS Weight A1/4s-15AFmnAeqLLLLZpkLLAFmxL1/14s-16AFmnAeqLLLLZpkLLAFmxLL1/14Select Mode & Setup

s-177Ø8 HoursEP,dLWAT&Threshold1/28 HoursEP,dLWAT&Threshold7Ø7Øs-181/2s-19Profile ---------------12Period 1min1/4Select Mode & Setup

When the required single band setup has been selected, pressonce to obtain the Broadband Measurement screen or twice to obtainthe Main menu that gives

selected preset intervals between 0 minutes and1 hour.When using timed scanning, make sure the repeat time is greater thanthe number of channels to be

√s-25ZFmxZeqLLLLZFL1/3s-26ZFmxZeqLLLLZFLL1/3s-27Repeat -----Bands Auto1/3Select Mode & Setup

When the required narrow band setup has been selected, pressonce to obtain the Narrow Band Measurement screen or twice to obtainthe Main menu that giv

4. OPERATION4.1 MeasurementWith the instrument configured, calibrated, measurement parametersspecified and timers set as described in the preceding ch

4.1.2 Broadband MeasurementZI Z73.68k2k50012532AZ406080100Lm-03dBAFmx30 100dBAFAeqAFmn ZpkLLLLLm-0220 90AFmxdBAFAeqAFmn ZpkLLLLLm-04Ø:1Ø20 9072.7dBØØØ

Wed 14 Jan 1998Ø9:45:2112:ØØ:ØØm-06DATAØØ:ØØ:21Type 1m-07Dur.Preamp.Range 2Ø -9ØFactory Setup67.4dB72.7dBAeqAFmxTm3AEZpkAFmnTm5EP,dLLLL9Ø.1dB63.2dB65.

Improvements Introduced with V 2.0 FirmwareNew Measurement Features:1. The ability to perform “broadband” logging measurements in aselected octave or

MENUØ:3520 9072.7dBØØØ8AFmxdBAFAeqAFmn ZpkLL63.2dB 9Ø.1dBLLL67.4dBm-09Ø:5620 9072.7dBØØ1ØAFmxdBAFAeqAFmn ZpkLL63.2dB 9Ø.1dBLLL67.4dBm-10Ø:Ø520 9072.7d

4.1.3 Narrow Band Measurement20 90AFmxdBAFAeqAFmn ZpkLLLLLm-23ZI Z73.68k2k50012532AZ406080100Lm-03dB8k2k50012532AZ40608010025Hz 12K5Hz-m-13Operation

ZI Z73.68k2k5001253220406080Lm-14dBAZZI 25Hz 43.68k2k5001253220406080Lm-15dBØØØØ Ø:1ØAZWed 14 Jan 1998Ø9:45:2112:ØØ:ØØm-06Operation

ZI Z73.68k2k5001253220406080Lm-16dBØ:1ØAZZI A68.38k2k5001253220406080Lm-17dBØ:17AZZI Z73.68k2k5001253220406080Lm-24dBAZDATAØØ:ØØ:36Type 1m-18Dur.Pream

4.2 Recall Stored Data & Print Hard CopyData stored in the instrument can be recalled to the display forinspection. This allows the operator to ch

Continue from Step 6 below. To display data from any stored run,proceed as follows.CalibrationMemoryr-01Measure ModeMeasure ModeSetup1/6Calibrationr-0

r-04TueThuWed 7 Jan19989 Jan199813 Jan199815 Jan1998Frir-05%MEM14:37:Ø6115 Jan1998Ø8:59:27 111:Ø9:5511:Ø9:55112:45:Ø91Tuer-06ØØ:ØØ:21Type 1Dur.Preamp.

r-0718PeriodStartNor-0815PeriodStartNor-1525PeriodStartNor-096Ø.4dB74.3dBAeqASmxTm3AEZpkASmnTm5EP,dLLLL94.8dB47.9dB65.ØdB- - -.-dBLLLL63.8dB87.7dBOper

4.3 Delete Stored DataUnwanted data stored in the instrument can be deleted to make roomfor new data. Proceed as follows.r-108k2k5001253220406080LAZZF

4.4. Format MemoryFormatting the memory (strictly re-formatting) is a global operation thatdeletes all stored data (runs) and all user setups from eve

ContentsChapter ... Page1. INTRODUCTION . . . . . . . . . . . . . . . . . . 71.1 Display & Keys ... 71.2 Quick Ed

Use this option with great caution !The option to format the instrument memory is displayed on thefinal Self Test screen.Proceed as follows.4.5 Use Wi

be used with a Type 2 instrument), then perform an acoustic calibrationas described in Section 2.2.4.5.1 RecordingThe following guide lines are sugges

this range of the sound level meter and ensures the maximumdynamic range for recording.7. Record about 30 seconds of the calibration signal.A calibrat

4. Replay the recorded calibration signal.5. Adjust the Replay Level control on the recorder so that the soundlevel meter display indicates the calibr

Operation

5. SPECIFICATION5.1 CEL-440Instrument Standards:Sound Level Meter to IEC 60651: 1979 Type 1I & Type 2I asrelevant.Integrating Averaging Sound Leve

All settings and orientations of the instrument have similarradio-frequency emissions. These radio-frequency emissions arewithin the specified limits

Linearity Ranges dB - Type 1:Linearity Ranges dB - Type 2:Specification

Filters:Octave Filter:Order 6, Type 3-D, optional range per ANSI S1.11 1986,Class 2 to IEC 1260: 1995,9 bands with centres from 31.5 Hz to 8 kHz (B an

Narrow Band Data Storage:Manual storage of 999 octave or 1/3 oct sets of results withchoice of:Auto scanning of frequency bands with measurement and s

Chapter ... Page4.5.2 Replay ... 525. SPECIFICATION . . . . . . . . . . . . . . . . . . 555.1 CEL-440 ...

The temperature correction to be applied for CEL-250 andMK 250 Type 1 microphones:Corrected level = Actual level - 0.02 (t - 20)Where t is temperature

Note that when an instrument is returned to battery operationafter being powered from an external supply, either switch theinstrument OFF then ON agai

Narrow Band Storage Capability:999 runs, each with up to 9999 octaves or third octaves bandscans in each run up to a maximum of 16 000 octave results

Once scanning has been started, each band will be measured inturn for the preset duration, with the resultant L, L,L at the end ofthe period saved in

Criteria 3 ensures that even when the meter is unable to reach asteady L, it will have measured for long enough to have as good an Las the source perm

Specification

5.4 ComplianceThe CEL-440 and CEL-480 Sound Level Meters comply with the EMCDirective 89/336/EEC of the European Union. They have been testedaccording

6. PARTS & WARRANTY6.1 Schedule of PartsA complete CEL-440 Sound Level Meter consists of:CEL-440 Sound Level Meter,Plus as applicable:CEL-250 Type

C6672 Active Printer Cable to Centronics printer(Requires C6724 Cable).6.2 Instrument Servicing & WarrantyTo ensure its conformity with the specif

The necessary adjustments or repairs will be carried out, and theinstrument returned as soon as possible.A comprehensive Instrument Calibration Mainte

1. INTRODUCTIONPlease read Sections 1.1 to 1.4 before commencing measurement. For aquick introduction to instrument operations, Chapter 4 may be used

Parts & Warranty

The broadband screen in Figure 1 shows one principal and foursubordinate parameters, where the principal parameter is a level asidentified below.The f

1.2 Quick EditAll control functions for the CEL-440 and CEL-480 are accessed via menudisplays. In addition a powerful Quick Edit facility can be invok