Casella CEL CEL-177 - Manual (Page 5)

Casella USA
17 Old Nashua Road #15
Amherst, NH 03031-2839
Microphone type Coupler required Correction to nominal level dB
CEL-186/2P CEL-2835 -1.0
CEL-186/2PR CEL-2835 -1.0
CEL-192F CEL-2835 -1.0
CEL-190F Not required -1.0
Genrad 1961 Not required 0
Genrad 1962 CEL-2834 0
Knowles BL1803 CEL-2834 0
B&K 4133 CEL-2835 -1.0
Figure 1
Microphone equivalent volume corrections to nominal output sound level
CEL-177 Acoustic Calibrator
level variation with altitude
-6.00
-5.00
-4.00
-3.00
-2.00
-1.00
0.00
1.00
2.00
-5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 1011121314151617181920
Altitude (ft x 1000)
Correction to output
level (dB)
Figure 2
Calibration corrections as a function of altitude realtive to sea level
CEL Dosimeter
model number
Dosimeter calibration count at
nominal output 114 dB
(includes coupler where used)
CEL-139D 58.2
CEL-172H & J 58.2
CEL-172K 184.8
CEL-172L 116.4
CEL-179H & J 46.2
CEL-179K 146.7
CEL-179L 92.4
CEL-180G 46.2
CEL-180J 146.7
CEL-180L 5.5
CEL-181G 58.2
CEL-181J 184.8
CEL-181L 6.3
Figure 3
Dosimeter calibration settings using CEL-177 Acoustic Calibrator
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