June 2011 CEL-35x dBadge Including Intrinsically Safe (I.S.) Versions Users Manual HB3323-07 CASELLA CEL Regent House, Wolseley Road, Kempston, Bedford, MK42 7JY, U.K. Phone: +44 (0) 1234 844 100 Fax: +44 (0) 1234 841 490 E-mail: info@casellacel.com Web: www.casellameasurement.com CASELLA USA 17 Old Nashua Road #15 Amherst, NH 03031-2839, U.S.A. Toll Free: +1 (800) 366 2966 Fax: +1 (603) 672 8053 E-mail: info@casellaUSA.com Web: www.casellaUSA.com CASELLA ESPANA S.A.
Caution UNDER NO CIRCUMSTANCES should this equipment be cleaned using a solvent based cleaner. The CEL-35X dBadge contains no user serviceable parts, do not open product case as this would invalidate the warranty. When in use, always use the windshield provided. Use only the recommended CEL-252 microphone. Damage caused by a failure to observe these warnings will NOT be covered by the normal warranty conditions.
Instructions specific to hazardous area installations (reference European ATEX Directive (94/9/EC, Annex II, 1.0.6.) The following instructions apply to equipment covered by certificate number Sira 07ATEX2032X for the CEL-35X/IS dBadge series: The certificate number includes an „X‟ suffix indicating that the following special conditions of certification apply; 1. Parts of the enclosure are non-conducting and may generate an ignition–capable level of electrostatic charge under certain extreme conditions.
CONTENTS 1 INTRODUCTION .................................................................................................... 5 2 SUPPLIED EQUIPMENT....................................................................................... 6 3 THE SYSTEM COMPONENTS ............................................................................ 8 3.1 The CEL-35X dBadge ......................................................................................... 8 3.2 Mounting Clips ......................................
1 INTRODUCTION The CEL-35X family consists of the CEL-350 dBadge, CEL-350L dBadge „Lite‟ and the CEL-352 dBadge „Plus‟. The CEL-35X dBadge is a unique solution to problems associated with the measurement of personal noise exposure. Using the latest digital technology ensures reliable and repeatable measurements. The CEL-35X dBadge has no cable like a traditional dosimeter, so is far easier to fit to an employee and is less likely to interfere with the individuals work.
2 SUPPLIED EQUIPMENT Carefully remove all components of the dBadge from the shipping container and check for possible damage or any missing items. If any items are not present or damaged please contact Casella CEL immediately. The following components should be included: CEL-35X Or CEL-35X/IS dBadge (includes microphone CEL-252, windshield CEL-6356 and calibration certificate) I.S.
Optional items at time of order: D8147/Z CEL-6351 CEL-6352 CEL-6354 CEL-6356 CEL-90336 3 Point Harness Spare Pin Mounting Kit (5 Pack) Crocodile Clip Mounting Kit (5 Pack) Hard Hat Mounting Kit Spare Windshield USB Adaptor Casella CEL-35X dBadge Users Handbook – Page 7
3 THE SYSTEM COMPONENTS 3.1 The CEL-35X dBadge The CEL-35X dBadge and controls are shown below in Figure 1. The two controls are the Left (L) and the Right (R) keys. Windshield Left „L‟ Key (Power Key) Right „R‟ Key LED Window Display Figure 1 3.2 Mounting Clips Upon delivery, the CEL-35X will be fitted with the CEL-6352 „Crocodile‟ mounting clips, as shown in Figure 2. Mounting clips can be changed using the screwdriver provided. For information on changing the mounting clips please see section 6.
Crocodile Mounting Clips Screws for mounting clips Figure 2 3.3 The CEL-6362 Charger A CEL-6362 is a drop-in intelligent 3-way charger unit, required to charge the internal Nickel Metal Hydride (NiMH) batteries on the CEL35X dBadge. The CEL-6362 consists of the charger base, part number 193102B-01 and the -PC18 mains power supply unit (PSU). The PSU will require fitting with an appropriate plug connector (supplied) for the country of use.
Note that all versions of the dBadge should only be charged in nonhazardous areas in the absence of any flammable atmospheres. 3.4 The Windshield During use, it is essential the dBadge is fitted with the CEL-6356 windshield (supplied). To calibrate the dBadge it is necessary to remove the windshield to gain access to the microphone. To remove the windshield, twist the black plastic ring below the foam anticlockwise and lift the windshield to remove.
4 CHARGING THE CEL-35X 4.1 Charging The CEL-35X dBadge uses internal NiMH batteries. Ensure the CEL35X is fully charged prior to use by placing in the charger as shown in Figure 5. Note the CEL-35X will fit into charger units regardless of which mounting clips are attached. Figure 5 Ensure the power supply (-PC18) is connected and the supply is switched on. The CEL-35X dBadge will automatically switch on during charging and display how much charge is within the dBadge, as shown in Figure 6.
Note that once removed from the charger, the dBadge will automatically switch off. If returned to the charger the CEL-35X will charge for a minimum time of 10 minutes regardless of whether it is fully charged. This does not affect battery performance in any way. If the battery is fully discharged prior to being placed on a charger, the CEL-35X will be trickle charged for a short time prior to the fast charge cycle, this prevents damage to the batteries.
5 GENERAL OPERATION 5.1 Switching on the dBadge Once the instrument is switched on by pressing the „L‟ key, it will display a start up sequence, shown in Figure 8. This displays the dBadge model number and firmware version (e.g. V1.07), followed by the „Custom Text‟ screen. This text can be configured using the Casella insight data management software. The screen will then change to the current time and date.
The subsequent screens will cycle through results from the last measurement run, as shown in Figure 10. Values shown will be dependent on whether the CEL-35X is configured to display ISO or OSHA parameters (see sections 5.6 & 5.7). ISO VIEW DURATION 07:45:12 LAEQ 89.9 LCPK 101.4 PA Hrs 3.20 PROJ DOSE 352.5 % LAVG 111.4 LZPK 119.4 OSHA DOSE 114.3 % PROJ DOSE 175.3 % OSHA VIEW DURATION 07:59:32 Additional screen on CEL-352 dBadge „Plus‟ model: LCEQ 92.4 dB LC-A 4.
The windshield should be removed prior to calibration, refer to section 3.4. Push the CEL-120/2 acoustic calibrator over the microphone as shown in Figure 11. The calibrator should be pushed on without twisting. Figure 11 The CEL-35X dBadge will automatically recognise a 1kHz calibration tone is present and display the screen shown in Figure 12. CALIBRATE ? X 114.0 Figure 12 Press the „R‟ key to confirm you wish to calibrate the unit, it will take a few seconds to calibrate automatically to 114.
CALIBRATING CAL. OK 114.0 Figure 13 Once the unit has successfully calibrated the „Cal OK‟ message will appear. In the unlikely event an error message is displayed as shown in Figure 14, please refer to „Troubleshooting‟ section. CAL. ERROR Figure 14 The CEL-35X is ready to take a measurement once the calibrator has been removed. NOTE: The CEL-120/2 must only be used to calibrate the CEL-35X/IS in a non-hazardous atmosphere. 5.
Press and hold for 3 seconds Press and hold for 3 seconds Figure 15 When these keys are held down together the display on the dBadge will begin a count down, as shown in Figure 16. The keys must be held down during the countdown for the measurement run to begin. START 3 START 2 START 1 Figure 16 will Once the measurement run has begun, the „Play‟ symbol appear in the top left of the screen. The display will cycle between 2 screens.
LAF 112.3 dB DUR 07:45:12 15Hrs 145Hrs Figure 17 Casella CEL recommends the dBadge is locked to prevent the wearer from tampering with the unit. To do this, press and hold the „R‟ key whilst pressing the „L‟ key 3 times, as shown in Figure 18. 2. Press 3 times 1. Press and hold Figure 18 This will lock the keypad so any random presses of keys will not accidentally effect the measurement. The display of the CEL-35X will also change so as not to show any SPL values.
If during a measurement run, the remaining battery or memory capacity falls below 2 hours, the red LED will flash and the warning icon will be shown on the display. 5.4 Stopping A Measurement Run If the CEL-35X dBadge is locked, first unlock the keypad by holding down the „R‟ key whilst pressing the „L‟ key 3 times, as shown in Figure 18. To stop the measurement run, press and hold the two keys simultaneously for the period of the countdown, as shown in Figure 20.
5.5 Reviewing Measurement Run Data As soon as a measurement run has been stopped, the dBadge will automatically display results from the completed measurement run. The display will automatically cycle as shown in Figure 21. The screen contents will depend upon which display mode is selected (ISO or OSHA).
If „Pro Mode‟ is enabled, screens shown in Figure 22 become viewable. The screen contents highlighted in blue will depend upon which display mode is selected (ISO or OSHA). To enable „Pro Mode‟ see section 5.6. Figure 22 By pressing the „R‟ key when on any of these screens, the display will stop cycling for a period of 5 seconds.
On the CEL-352 dBadge „Plus‟, The LC-A is simply the LCeq minus the LAeq for use in the HML method for the selection of hearing protection. For detailed information on how to use these values to calculate the effectiveness of hearing protection, please see section 10.3. 5.6 Configuration Menu The configuration menu is accessed by holding the „R‟ key down whilst switching on the dBadge („L‟ key), see Figure 23. CONTRAST English, French, German, Italian, Spanish, Portuguese PRO. MODE NO Yes...
The first configuration screen to be displayed is the contrast menu. For each option within these menus press the „L‟ key to adjust what is on the screen then press „R‟ to confirm and move to next screen. Contrast setting You can adjust the display contrast for best viewing of the text on screen. There are 6 different contrast levels available. Language setting You can select one of the pre-programmed languages that are available.
Scroll LCD setting You can choose to allow the display screens to scroll through as described above or you can select to switch off this function and step through the displayed dosimeter screens one by one manually. dB Alarms setting You can choose to enable or disable the high intensity blue flashing LED when the measured noise levels exceed the set threshold trigger levels chosen in the Casella insight data management software (or dB35) configuration setup. For further details see section 5.8.
5.7 Display Mode The selected display mode specifies which key results are displayed on the screen upon completion of a measurement run. Regardless of which display mode is set, the dBadge measures ALL parameters during every measurement run. Once downloaded to the Casella insight data management software, all measured data can be viewed. The key displayed results set can be either configured to ISO (for Europe) or OSHA (for U.S.A), as shown in the table below.
5.8 Alarm Settings Alarm levels can be set within the Casella insight data management software based on action levels for local workplace noise regulations. They can be used by an employer as a visual indicator of an individual's exposure throughout the day and can be switched „on‟ or „off‟ as per section 5.6. If these pre-determined alarm levels are exceeded then the blue LED on the front of the CEL-35X will flash. The location of the LED is shown in Figure 24.
Display Setup ISO Blue LED Off Leq <=79.9dB(A) AND Lpk <=134.9dB(C) OSHA Lavg (T=80) <=84.9dB(A) AND Lpk <=139.9dB(Z) Blue LED Flashing Slow Leq >=80 & <=84.9 dB(A) OR Lpk >=135 & <=136.9 dB(C ) Lavg (T=80) >=85 (A) OR Lpk >=140dB(Z) Blue LED Flashing Fast Leq >=85dB(A) OR Lpk >=137dB(C) Lavg (T=80) >=85dB(A) AND Lpk >=140dB(Z) For the ISO mode, the alarm levels are based upon the EU directive 2003/10/EC.
6 MOUNTING THE CEL-35X The recommended location for mounting a noise exposure meter varies depending upon the legislation specific to a country. Most countries recommend a position close to the ear (10-15cm) so the dBadge can be mounted on a collar or shoulder. The UK legislation recommends mounting on the top of the shoulder to avoid reflections from the head and body affecting the measurements as much as possible. All mounting clips are attached to the CEL-35X dBadge by two screws.
CEL-6351 Pin Mounting Kit Figure 26 6.2 CEL-6352 Crocodile Clip Mounting Kit The CEL-6352 crocodile mounting clips are fitted to the CEL-35X dBadge upon delivery as they can be fitted to virtually any clothing type. The CEL-6352 is used for attaching the CEL-35X to clothing and should be used where piercing the employees‟ clothing is not desired. CEL-6352 Crocodile Clip Mounting Kit –Front/Rear Figure 27 Note, when any of the mounting clips are ordered, they are supplied in packs of 5, i.e.
6.3 CEL-6353 Harness Mounting Kit The CEL-6351 is used for attaching the CEL-35X to the D8147 harness or an existing harness that the employee may wear. The CEL-6351 Pin kit and the D8147 are pictured in Figure 28. CEL-6351 Pin Mounting Kit, Fitted to D8147 Harness Figure 28 6.4 CEL-6354 Hard Hat Mounting Kit The CEL-6354 hard hat mounting kit can be used to fit the CEL-35X dBadge to most hard hats. It consists of a loop with four hooks which loop over the rim of the hard hat.
7 TECHNICAL SPECIFICATION 7.1 Specification Sound Exposure Meter/Dosimeter Standards: IEC 61252: 2002, BS EN 61252: 1997, ANSI S1.25 - 1992 for dosimeters and sound exposure meters. The CEL-35X conforms to the requirements for EMC emissions and immunity as specified in IEC 61000-4-2/6-1, 61000-4-6/6-2, 61000-43/CISPR 61000-6-3.
Indication Overload Indication: 140.4dB RMS (i.e. 0.1dB above the top of the range), Peak Overload Value: 143.4dB Peak Linear (i.e. 3.1dB above the top of the range), Stabilisation Time: 3 seconds after power up, Operating Environment o o Temperature: 0 C to +40 C, Pressure: 65 - 108kPa, Humidity ± 0.
8 SERVICING AND WARRANTY ARRANGEMENTS To ensure conformity with the specification, this instrument is thoroughly inspected and it‟s accuracy verified prior to dispatch. All technical information is filed under the instrument serial number, which should be quoted in any correspondence. The manufacturer undertakes to rectify any defect in the instrument directly attributable to faulty design or assembly and which becomes apparent during the warranty period.
9 TROUBLESHOOTING Symptom The dBadge will not switch on Incorrect time or date is displayed when turning on the dBadge Possible Cause The dBadge batteries are flat The time and date has not been set or PC clock is set incorrectly „Cal Error‟ Message appears when calibrating dBadge dBadge will not enter calibration mode Calibrator is not switched on Calibrator is incorrectly fitted „Battery Fail‟ message appears on display „Memory Full‟ message appears on display Suggested Solution Charge the dBadge uni
10 APPENDIX 10.1 Glossary of Terms This Appendix gives a glossary of the acoustic terminology used in this handbook and in the CEL-35X dBadge and Casella insight data management software. For further information, please contact Casella CEL or your local representative. A-Weighting A standard weighting of the audible frequencies designed to approximate the response of the human ear to noise.
Decibel (dB) The standard physical unit for measuring sound level and noise exposure. Estimated Exposure in Pa2h A calculated estimate of the exposure that would be received by the wearer if the average level measured continues for the period defined by the criterion time. Expressed in Pascal squared hours (Pa2h). Fast Time Weighting A standard time weighting applied by the sound level measurement instrument. IEC 61252 The International Standard for Personal Sound Exposure Meters.
LAVG This is a parameter used in OSHA measurements. It is the average sound level over the measurement period (equivalent to Leq). Normally the term is used when the exchange rate Q is some value other than 3, such as for measurements used for the OSHA Hearing Conservation Amendment with Q=5. A Threshold value is used during the calculation of LAVG, where any levels below the threshold are not included. For example, assume the threshold level is set to 80dB and the exchange rate is 5dB (Q = 5).
the pressure wave, which should not be confused with the highest sound pressure level, termed Lmax. Slow Time Weighting A standard time weighting applied by the noise measurement instrument. SPL The sound pressure level. This is the basic physical measure of noise, and is normally expressed in dB. Threshold A threshold below which sound levels are excluded from calculation.
10.2 Measured Parameters ISO: LAeq, LCpeak, LAEP,d, Pa2Hours Projected %dose (Q=3) OSHA: LAavg (Q=5), LZpeak, LASmax, %dose (Q=5), TWA Projected %dose (Q=5) General: LAFmax, LAFmin, LASmin (via dB35) LAIeq, LAImax, LAImin, LApeak Time history: LAeq, LZpeak, LCpeak, LAavg (Q=5) Stored as 1 minute values (except CEL-350L) The dBadge „Plus‟ additionally provides simultaneous measurements of LCeq, and LAeq, together with calculated LCeq-LAeq, used for the selection of hearing protection.
*with Q5, threshold 70-90 (default 80dB) and criterion 70-90 (default 90dB) in 1dB steps. # Threshold T80…T90… or T80+T90. 1 displayed on the CEL-35X, remainder shown on Casella insight data management software 2 displayed on CEL-352 dBadge „Plus‟ model only The dBadge also stores 1-minute values of the following parameters (Except dBadge „Lite‟): LAeq, LAavg, LCpeak, LZpeak. 10.
The LC-A value displayed on the CEL-352 dBadge „Plus‟ (see Figure 21) is the LCeq – LAeq. It is important to know this because using the HML method requires 2 different formulas depending on the LCeq – LAeq value, as shown below: If LCeq – LAeq is less than or equal to 2: PNR = M – (H-M) x (LCeq – LAeq – 2) 4 If LCeq – LAeq is greater than 2: PNR = M – (M-L) x (LCeq – LAeq – 2) 8 Where PNR is the predicted noise level reduction provided by the hearing protection.
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