March 2010 CEL-350 dBadge & CEL-352 dBadge ‘Plus’ Including Intrinsically Safe (I.S.) Versions Users Manual HB3323-05 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.casellacel.com CASELLA USA CASELLA ESPANA S.A. 17 Old Nashua Road, Polígono Európolis # 15, Amherst, Calle C, nº4B NH 03031, 28230 Las Rozas - Madrid U.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 ......................................................................... 7 3.1 The CEL-35X dBadge...................................................................................... 7 3.2 Mounting Clips.....................................................
1 INTRODUCTION The CEL-35X family consists of the CEL-350 dBadge 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. Casella CEL provides various mounting options for the dBadge.
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 dBadge (includes microphone CEL-252, windshield CEL-6356 and calibration certificate) Or CEL-35X/IS I.S.
Optional items at time of order: D8147/Z CEL-6351 CEL-6352 CEL-6353 CEL-6354 CEL-6356 CEL-90336 3 Point Harness Spare Pin Mounting Kit (5 Pack) Crocodile Clip Mounting Kit (5 Pack) Harness Mounting Kit (5 Pack) Hard Hat Mounting Kit Spare Windshield USB Adaptor 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.
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 CEL-35X 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.
charged in non-hazardous 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 anti-clockwise and lift the windshield to remove. Figure 4 Once the CEL-35X dBadge has been calibrated (section 5.
4 CHARGING THE CEL-35X 4.1 Charging The CEL-35X dBadge uses internal NiMH batteries. Ensure the CEL-35X 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.
CHARGING 27Hrs FULL 28Hrs 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 dB35 software (optional, refer to dB35 manual). The screen will then change to the current time and date.
7Hrs 80Hrs 13:45:03 LAF 112.3 dB Figure 9 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 % OSHA DOSE PROJ DOSE 175.3 352.5% % OSHA VIEW DURATION 07:59:32 LAVG 111.4 LZPK 119.4,dB 114.
5.2 Calibration It is important to calibrate each dBadge before and after use, in accordance with workplace noise regulations. The dBadge records calibration levels and times which can be viewed later on dB35 software. Note that the dBadge will not enter calibration mode if a measurement run is taking place. If a run is in progress, stop the run according to section 5.4. The windshield should be removed prior to calibration, refer to section 3.4.
CALIBRATE ? 114.0 X Figure 12 Press the ‘R’ key to confirm you wish to calibrate the unit, it will take a few seconds to calibrate automatically to 114.0dB, during which time a progress bar will be displayed as shown in Figure 13. 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.
5.3 Starting A Measurement Run Ensure the windshield is fitted according to section 3.4. The windshield protects the microphone from any potential erroneous results from wind, but also helps to protect from any dust ingress, moisture or impact damage. Before taking a measurement run, ensure there is sufficient battery life and memory by looking at the screen shown in Figure 9. If necessary charge the dBadge as described in section 4.1 and clear the memory as described in section 5.
START 3 START 2 START 1 Figure 16 Once the measurement run has begun, the ‘Play’ symbol will appear in the top left of the screen. The display will cycle between 2 screens. The first displays instantaneous sound pressure level (SPL) values and the duration of the measurement run so far. The second displays the status of the memory and battery. The screens are displayed below in Figure 17. LAF 112.
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. This removes the temptation to shout into the microphone, as it has no visual effect.
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. STOP 3 STOP 2 STOP 1 Figure 20 The display on the CEL-35X will then show the data from the measurement run that has just been completed, as shown in Figure 21.
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). OSHA View ISO View Battery and memory status Instantaneous SPL and time 10Hrs 10Hrs 80Hrs 80Hrs 13:45:03 LAF 112.3 dB 14:05:09 LAS 109.
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.
On the language screen, the available options are English, Spanish, French, Italian, German and Portuguese. For further details about the ‘Display Mode’ see section 5.7. The ‘Alarms’ can be switched either ‘on or ‘off’ using this menu, but the alarm levels are set using the dB35 software. For further details of the ‘Alarms’ see section 5.8. When on the clear memory screen, the memory can be cleared by first pressing the ‘L’ key to change the ‘No’ option on the screen to ‘Yes’.
For a definition of each of these terms please see Appendix 1, section 10.1. Note that for the OSHA data, the LAavg and the % dose data use a threshold of 80dB and a criterion value of 90dB. For a full list of all the measurement parameters available from dB35, please refer to Appendix 1, section 10.2. 5.8 Alarm Settings Alarm levels can be set within the dB35 software based on action levels for local workplace noise regulations.
Display Blue LED Setup Off Leq <=79.9dB(A) ISO AND Lpk <=134.9dB(C) OSHA Lavg (T=80) <=84.9dB(A) AND Lpk <=139.9dB(Z) Blue LED Flashing Slow Blue LED Flashing Fast Leq >=80 & <=84.9 dB(A) OR Lpk >=135 & <=136.9 dB(C ) Lavg (T=80) >=85 (A) OR Lpk >=140dB(Z) 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.
Correct Screw Orientation CEL-6351Pin Mounting Kit CEL-6352 Crocodile Clip Mounting Kit –Front/Rear Figure 24 Note, when any of the mounting clips are ordered, they are supplied in packs of 5, i.e. enough to fit 5 dBadge units.
6.3 CEL-6353 Harness Mounting Kit The CEL-6353 is used for attaching the CEL-35X to the D8147 harness or an existing harness that the employee may wear. The CEL-6353 harness kit and the D8147 are pictured in Figure 25. CEL-6353 Harness Mounting Kit CEL-6353 Harness Mounting Kit, Fitted to D8147 Harness Figure 25 6.4 CEL-6354 Hard Hat Mounting Kit The CEL-6354 hard hat mounting kit can be used to fit the CEL35X dBadge to most hard hats.
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, 61000-4-3/CISPR 61000-6-3.
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 dBadge is not switched on or a measureme
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 dB35 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 measurement instrument. applied by the sound level 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).
Peak The maximum level in dB reached by the sound pressure at any instant during a measurement period. With the dBadge, Peak is measured with either C, Z or A weighting. It is the true peak level of 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.
10.2 Measured Parameters Regardless of which display mode is selected (ISO or OSHA) ALL parameters are stored simultaneously and can be viewed via dB35 software. The CEL-35X also stores other parameters and 2 ‘dose histograms’. This allows other data to be calculated and displayed on the dB35 software. The total mix of parameters either displayed on the CEL-35X or those that can be displayed on the dB35 software are summarised below.
10.3 Using the CEL-352 for the Selection of Hearing Protection The CEL-352 dBadge ‘Plus’ can be used for the selection of hearing protection by 2 different methods. These are the Single Number Rating (SNR) and the High, Medium, Low (HML) methods. Hearing protection manufacturers will provide data as follows: HML values H=31 M=25 L=17 SNR value = 28 The SNR value is a single value which represents the attenuation of the hearing protection.
Where PNR is the predicted noise level reduction provided by the hearing protection. For example, if from the CEL-352 dBadge ‘Plus’ the values were: LCeq 102.4dB LAeq 98.6dB Therefore, as the LCeq – LAeq value is greater than 2: PNR = M – (M-L) x (LCeq – LAeq – 2) 8 From the example of the hearing protector mentioned above: PNR = 25 – (25-17) x (102.4 – 98.6 – 2) 8 PNR = 25 – 1 x 1.8 PNR = 25 – 1.8 PNR = 23.2dB The A-weighted SPL at the ear = LAeq – PNR The A-weighted SPL at the ear = 98.6 – 23.2 = 75.
10.
Casella CEL-35X dBadge Users Handbook – Page 40
Casella CEL-35X dBadge Users Handbook – Page 41
