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If the microphone is ever dropped (the effects of this can be minimized by PCB’s rugged grid cap or utilizing 
rugged microphone kits), or comes into contact with any contamination, or is exposed to extreme tempera-
tures, immediate recalibration of the microphone should be performed. When using a rugged grid cap, a 
handheld calibrator with a 1” diameter (example CAL250,  or pistonphone) is required for recalibration, 
along with the larger (079A59) calibration adapter.  Please note that heat from your hands can affect the 
calibration results. It is always good practice to wait a minimum of 30 seconds after placing the microphone 
on a test system before taking a calibration reading in order to minimize the effect that heat from your hands 
has  on  the  calibration.  Changes  in  the  environmental  conditions:  temperature,  humidity  or  atmospheric 
pressure, may cause a change in your microphones sensitivity and thus, changes in your output accuracy. It 
is always recommended to calibrate both before and after your test, within the test environment. Performing 
a single point handheld calibrator check, both before and after your test, ensures reliability of the test data. 
With proper maintenance, the microphone and preamplifier should provide stable and accurate results for 
years to come.  

7.0

 

Calibration 

PCB offers recalibration services for our precision microphones, as well as units produced by other A2LA 
manufacturers.  Our  internal  metrology  laboratory  is  certified  to  ISO  9001,  accredited  by  A2LA  to 
ANSI/IEC 17025 and ANSI/NCSL Z540-1, complies with ISO 10012-1 (and former MIL-STD-45662A), 
and uses equipment directly traceable to one or more of the following National Labs (NIST, PTB or DFM). 
Our investment in equipment, traceability and conformance to industry standards ensures accurate calibra-
tion against relevant specifications. We also carry a line of acoustic calibrators that can be used to calibrate 
microphone sensitivity on site as needed. 

Hand calibration of sensitivity for most prepolarized microphones may be performed with a Larson Davis 
CAL250  or  CAL200  (or  equivalent).    The  CAL250  produces  114  dB  SPL  at  251.2  Hz.    The  CAL  200 
produces either 94 dB or 114 dB (user selectable) at 1000 Hz.  Note that both the CAL250 and CAL 200 
are compliant with ANSI S1.40-2006, Specifications and Verification Procedures for Sound Calibrators, 
Class1 and IEC 60942-2003, Class 1, Sound Calibrators. 

8.0

 

Warranty and Service 

All equipment and repair services provided by PCB Piezotronics, Inc. are covered by a warranty against 
defective material and workmanship under a 

Total Customer Satisfaction

 policy. If, at any time, for any 

reason, you are not completely satisfied with any PCB product, PCB will repair, replace, or exchange it at 
no charge. You may also choose to have your purchase price refunded. See the supplemental sheet, con-
tained with this manual, for information on our service, repair and return policies, procedures and instruc-
tions. When unexpected problems arise, call our 24-Hour SensorLine

SM

 (716-684-0001) to speak with an 

Application Engineer. Visit 

www.pcb.com

 for a complete statement of our warranty. 

 
 
 
 
3425 Walden Avenue, Depew, NY 14043-2495 

24-hour SensorLine

SM

: 716-684-0001 

E-Mail: 

[email protected]

 

U.S.A. Fax: 716-684-0987 

Website: 

www.pcb.com

 

Toll-free (in the U.S.A.): 800-828-8840

 

 
A PCB GROUP COMPANY  

ISO 9001 CERTIFIED 

A2LA ACCREDITED to ISO 17025 

 2014 PCB Group, Inc. In the interest of constant product improvement, specifications are subject to change without notice. 

PCB and ICP are registered trademarks of PCB Group, Inc. Sensor Line is a service mark of PCB Group, Inc. All other trademarks 
are properties of the respective owners. 
 Manual Number: 27042 

Manual Revision: F 
ECO 51020 

 
 

Printed in the U.S.A. 

Summary of Contents for EX378B02

Page 1: ...ystem Installation and Operating Manual For assistance with the operation of this product contact the PCB Piezotronics Inc Toll free 716 684 0001 24 hour SensorLine 716 684 0001 Fax 716 684 0987 E mai...

Page 2: ...alized tests including sensitivity at elevated or cryogenic temperatures phase response extended high or low frequency response extended range leak testing hydrostatic pressure testing and others For...

Page 3: ...tion on particular operating steps The following symbols may be found on the equipment described in this manual This symbol on the unit indicates that high voltage may be present Use standard safety p...

Page 4: ...China RoHS 2 Disclosure Table Pb Hg Cd Cr VI PBB PBDE O O O O O O PCB X O O O O O O O O O O O X O O O O O O O O O O O O O O O O O O O O O O O O O X O O O O O O O O O X O O O O O O O O O O O X O O O O...

Page 5: ...O Wires O O O O O O Cables X O O O O O Plastic O O O O O O Solder X O O O O O Copper Alloy Brass X O O O O O This table is prepared in accordance with the provisions of SJ T 11364 O Indicates that sai...

Page 6: ...in which the instrument will be used Whether for legal purposes or for quality assurance programs these standards will help determine the required quality accuracy and consistency of the instrument St...

Page 7: ...owered with a 24V or a 12V phantom power supply but this will limit the maximum output voltage Externally Polarized Microphone System Prepolarized Microphone System Phantom Powered Microphone System T...

Page 8: ...em such as the preamplifier signal conditioner or instrumentation Conversely the Cartridge Thermal Noise CTN specification provides the lowest measurable sound pressure level that can be detected abov...

Page 9: ...rugged grid cap shown below and as an independent part of a rugged kit to extend the lifespan of the precision measuring device caution should be taken to ensure the delicate diaphragm sensing element...

Page 10: ...ustry standards ensures accurate calibra tion against relevant specifications We also carry a line of acoustic calibrators that can be used to calibrate microphone sensitivity on site as needed Hand c...

Page 11: ...ow 1 to 2 minutes for the system to stabilize The meter or LED on the signal conditioner should be reading green This indicates proper operation and you may begin taking measurements If a faulty condi...

Page 12: ...outine calibration of sensors by the manufacturer is recommended as this helps build confidence in measurement accuracy and acquired data Danger Areas for pressure relief devices N A not a pressure re...

Page 13: ...14043 3425 Walden Ave Depew New York 14043 No 65238 No 3 of 3 Rev NR ECO 45769 Note Literature such as the manual or marketing materials describing the equipment or protective system must not contrad...

Page 14: ...d a voltage be supplied to an ICP Microphone System without a current regulating diode or equivalent electrical circuit This may include ohmmeters multi meters and continuity testers Safe Use After co...

Page 15: ...highly recommended to keep spare cables on hand to enable continuation of the test in the event of a cable failure Install Microphone system per drawing 68216 Adjustment The EX378XYYY series come ass...

Page 16: ...IV 1 GROUPS A B C D CODE IDENT NO 52681 DWG NO SCALE SHEET DRAWN CHECKED ENGINEER TITLE UNLESS OTHERWISE SPECIFIED DIMENSIONS ARE IN INCHES DECIMALS X 05 XX 01 XXX 005 ANGLES 2 DEGREES FILLETS AND RAD...

Page 17: ...oltage 7 Vpk 7 Vpk Output Impedance 50 Ohm 50 Ohm Physical Housing Material Stainless Alloy Stainless Alloy Venting Rear Rear 4 Electrical Connector BNC Jack BNC Jack Mounting Thread Grid 0 5 60 UNS 0...

Page 18: ...MICROPHONE DECIMALS XX 03 XXX 010 DECIMALS X 0 8 XX 0 25 KRM 3 1 18 KRM 3 1 18 GGS 3 1 18 66401 PCB Piezotronics Inc claims proprietary rights in the information disclosed hereon Neither it nor any r...

Page 19: ...ia IIC T4 Ga I M1 Ex ia I CODE IDENT NO 52681 DWG NO SCALE SHEET DRAWN CHECKED ENGINEER TITLE UNLESS OTHERWISE SPECIFIED DIMENSIONS ARE IN INCHES DECIMALS X 05 XX 01 XXX 005 ANGLES 2 DEGREES FILLETS...

Page 20: ...stem Type Ex378XYYY Optional accessory Type of Protection Ex ia Marking Ex ia I Ma Ex ia IIC T4 Ga Approved for issue on behalf of the lECEx Certification Body Position Signature for printed version D...

Page 21: ...ns as set out in lECEx Scheme Rules lECEx 02 and Operational Documents as amended STANDARDS The electrical apparatus and any acceptable variations to it specified in the schedule of this certificate a...

Page 22: ...e the interface to an external cable assembly The equipment is intended to be used for leak detection and acoustic noise tests in gaseous or mining explosive areas SPECIFIC CONDITIONS OF USE YES as sh...

Page 23: ...trinsic safety 1 EN 61326 1 2013 Electrical Equipment for Measurement Control and Laboratory Use EMC EN 61326 2 3 2013 Electrical Equipment for Measurement Control and Laboratory Use EMC EN 61010 1 20...

Page 24: ...venue du G n ral Leclerc FR 92260 Fontenay aux Roses Tel 33 1 40 95 60 60 Fax 33 1 40 95 86 56 I the undersigned hereby declare that the equipment specified above conforms to the a W Direce Standard s...

Page 25: ...nfidentiel s No report s N 144457 692709 8 Le respect des Exigences Essentielles de S curit et de Compliance with the Essential Health and Safety Sante est assure par la conformit a Requirements has b...

Page 26: ...nd a preamplifier The delivered signal from lOP Microphone Systems provides a typical 1 7V peak voltage output signal when making acoustic measurements The microphone cartridge is the sensing element...

Page 27: ...r metallic body and cable shield are reliably connected to the system earth The apparatus must be connected according to instruction manual For final installation the user shall take all necessary pre...

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