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Calibration Certificate <br />Part Number: 714A0401 <br />Description: BMIII LIN MIC 2HZ-250HZ <br />Date: Lune 22, 2001 <br />Unit SiN: BH6700 <br />TEST REFERENCES Model Serial No. <br /> <br />Stanford Spectrum Analyzer* SR760 41067 <br />Good Will Inst. Frequency Counter+ GUC-2010G 5110825 <br />Fluke MulUmeter* 87 64900577 <br />VOD Cable Simulation Test Jig 71770201 n/a <br />Bruel &Kjaer Accelerometer* 4370 925067 <br />Bruel &Kjaer Charge Ampl~er+ 2635 974792 <br />Bruel & Kjaer Mic Power Supply* 2804 1904947 <br />Bruel &Kjaer Microphone Preamplifier* 2669 1834210 <br />Bruel &Kjaer Microphone Elemen[* 4193 1863904 <br />INSTANTEL INC. hereby cen~es that Uus unit has been calibrated and <br />that Ute results are consistent with the specifications published regarding <br />this instrument. The SENSORCHECK feature of the unit is sufficiently <br />reliable to indicate proper operation, although it is recommended that this <br />unit be sent to INSTANTEL or an authorized service centre for regular <br />calibration. <br />AUTHORIZED BY: ~~~J <br />*References are Vaceable to NRC, NIST or equivalent <br />of <br />z <br />4 <br />