Lubell Labs VC2C User manual

WARNING: FOR USE BY QUALIFIED OCEAN ENGINEER ONLY!
The Lubell Labs VC2C is an underwater acoustic transducer covering the frequency range of 50 Hz to 1500
Hz at a maximum sound pressure level of 174dB/uPa/m @ 115 Hz. Sales of the VC2C are limited to
marine scientists and laboratories, ocean engineers, and the military.
Description: Axial symmetric dual-piston radiator with spring copper diaphragms and external stops
Materials: End plate assm - 316 stainless steel; Pistons/housing - Hardcoat anodized 6061 aluminum
Finish: Safety yellow TGIC polyester powder coat
Frequency Range: 50 Hz to 1.5 kHz
Resonant Frequency: 115 Hz +/- 5 Hz
Impedance: Varies with frequency (4 ohms min @ 50 Hz; 17 ohms @ 1500 Hz)
Maximum Output Level: 174dB/uPa/m
Maximum Voltage/Current: 20 Vrms/2.5A (100% duty cycle)
Q Parameters: Qtco~2.5 Qmc~5
Directivity: Omnidirectional to 1.5 kHz
Bulkhead Connector: Subconn MCBH3MSS (Coding: Pin 2 hot, Pin 1 return, Pin 3 ground)
Mating Cable: Subconn MCIL3F // MCDLS-F on 50 feet (15.24m) 18/3 SOOW cable
Minimum / Maximum Depth: 10 feet (3.05 meters) - 50 feet (15.24 meters)
Maximum Pressure: 23 psi (WARNING: use provided hand air pump only!)
Piston Stop Gap: 0.016 inches (Schrader valve pin depressed to equalize internal/external pressure)
Dimensions (LWH): 9.5 IN (241.3mm) x 8.5 IN (215.9mm) x 8.5 IN (215.9mm)
Weight: 23.25 lbs (10.55 kg)
Includes: Lubell VC2C underwater speaker, Subconn MCIL3F/MCDLS-F on 50’ SOOW cable,
Blackburn 2038415 hand pump, Accutire MS-4021B digital pressure gauge. Case optional.
Warranty: 90 days parts & labor against manufacturing defects.
INSTRUCTIONS: LUBELL LABS VC2C UNDERWATER SPEAKER

CAUTION:
The Lubell VC2C is for sale to marine scientists and laboratories, ocean engineers, and the
military. Set-up and operation of the VC2C must be supervised by an engineer having a
background in ocean engineering, due to special pressure compensation requirements and
potentially harmful sound levels.
WARNING:
MUST BE GROUNDED
VC2C MUST BE PRESSURIZED TOPSIDE BEFORE DEPLOYMENT AT FIXED
OPERATING DEPTH PER ATTACHED INFLATION SCHEDULE
DO NOT DEPRESS THE SCHRADER VALVE CORE PIN IN THE WATER
1. Equipment operator should wear dry rubber-soled shoes while setting up and operating equipment.
2. Inspect all equipment and cordage before use. Do not use equipment if cords are damaged.
3. Set up a wood or plastic insulated equipment table in a dry sheltered area keeping a minimum
distance of 10’ from the water. Keep equipment securely fastened in place if using on a boat or ship.
4. Attach a sturdy 3/8 inch three-strand polypropylene rope of sufficient length to the attachment eyelet
on the VC2C underwater acoustic transducer. Depth markers should be placed on the rope in 1 foot
intervals to determine the operating depth of the VC2C when deployed from vessel.
5. After lightly lubricating the pins with silicone grease, attach the Seaconn MCIL3F//MCDLS-F 50’
SOOW cable to the mating SUBCONN MCBH3MSS bulkhead connector fitted on the VC2C
underwater speaker. IMPORTANT: Strain relief a loop in the SO cable using HD nylon cable
ties so as to prevent any strain on the bulkhead connector. Failure to follow this procedure
may result in damage to the bulkhead connector, which will require factory replacement.
6. GROUNDING: Ground the VC2C to an approved ship ground or tank ground via the green
conductor in the SOOW cable.
7. IMPORTANT: Before lowering the VC2C underwater speaker into the water (from dry deployment
area), depress the Schrader valve core pin to equalize (zero out) the internal air pressure of the VC2C
with that of the surrounding atmospheric pressure.
8. IMPORTANT: Verify that both of the VC2C’s piston-stop gaps are precisely set to 0.016 inches,
and that the set-screw lock-nut is securely tightened.
9. Determine and record the proposed operating depth for the VC2C tests.
10. The VC2C must then be precisely inflated with the supplied hand pump to the correct pressure
corresponding to the intended depth of operation per following schedule: Freshwater: 0.433 psi x
depth of operation in feet; Saltwater: 0.444 psi x depth of operation in feet. When pressurized, the
piston-stop gaps will close while on the platform, but will then return to the preset 0.016 inch gap
once the VC2C is deployed to the prescribed depth of operation. (Practice measuring the pressure
with the included Accutire MS-4021B digital pressure gauge, as each time you check the pressure,
you release a small amount of air...pressure must be accurate!) WARNING: Disconnect the VC2C
from amplifier if diver is verifying the 0.016 inch piston-stop gap at depth.
11. Tether the VC2C at the test depth determined in step 9, and compensated for in step 10.
12. Connect VC2C to amplifier rated up to 100 watts @ 4 ohms (20 Vrms). Coding: White=Hot,
Black=Return, Green=Ground. WARNING: Connect AC powered amplifier to GFCI outlet only.
13. To help protect the VC2C against burnout, install a 2.5A fast-blow fuse in the white signal wire.
INSTRUCTIONS: LUBELL LABS VC2C UNDERWATER SPEAKER

DEPLOYMENT DEPTH VS REQUIRED INFLATION PRESSURE VC2C
SALTWATERFRESHWATER
50 FEET = 22.220 PSI50 FEET = 21.650 PSI
49 FEET = 21.756 PSI49 FEET = 21.217 PSI
48 FEET = 21.312 PSI48 FEET = 20.784 PSI
47 FEET = 20.868 PSI47 FEET = 20.351 PSI
46 FEET = 20.424 PSI46 FEET = 19.918 PSI
45 FEET = 19.980 PSI45 FEET = 19.485 PSI
44 FEET = 19.536 PSI44 FEET = 19.052 PSI
43 FEET = 19.092 PSI43 FEET = 18.619 PSI
42 FEET = 18.648 PSI42 FEET = 18.186 PSI
41 FEET = 18.200 PSI41 FEET = 17.753 PSI
40 FEET = 17.760 PSI40 FEET = 17.320 PSI
39 FEET = 17.316 PSI39 FEET = 16.887 PSI
38 FEET = 16.872 PSI38 FEET = 16.454 PSI
37 FEET = 16.428 PSI37 FEET = 16.021 PSI
36 FEET = 15.984 PSI36 FEET = 15.588 PSI
35 FEET = 15.540 PSI35 FEET = 15.155 PSI
34 FEET = 15.096 PSI34 FEET = 14.722 PSI
33 FEET = 14.652 PSI33 FEET = 14.289 PSI
32 FEET = 14.208 PSI32 FEET = 13.856 PSI
31 FEET = 13.764 PSI31 FEET = 13.423 PSI
30 FEET = 13.320 PSI30 FEET = 12.990 PSI
29 FEET = 12.876 PSI29 FEET = 12.557 PSI
28 FEET = 12.432 PSI28 FEET = 12.124 PSI
27 FEET = 11.988 PSI27 FEET = 11.691 PSI
26 FEET = 11.544 PSI26 FEET = 11.258 PSI
25 FEET = 11.100 PSI25 FEET = 10.825 PSI
24 FEET = 10.656 PSI24 FEET = 10.392 PSI
23 FEET = 10.212 PSI23 FEET = 9.959 PSI
22 FEET = 9.768 PSI22 FEET = 9.526 PSI
21 FEET = 9.324 PSI21 FEET = 9.093 PSI
20 FEET = 8.880 PSI20 FEET = 8.660 PSI
19 FEET = 8.436 PSI19 FEET = 8.227 PSI
18 FEET = 7.992 PSI18 FEET = 7.794 PSI
17 FEET = 7.548 PSI17 FEET = 7.361 PSI
16 FEET = 7.104 PSI16 FEET = 6.928 PSI
15 FEET = 6.660 PSI15 FEET = 6.495 PSI
14 FEET = 6.216 PSI14 FEET = 6.062 PSI
13 FEET = 5.772 PSI13 FEET = 5.629 PSI
12 FEET = 5.328 PSI12 FEET = 5.196 PSI
11 FEET = 4.884 PSI11 FEET = 4.763 PSI
10 FEET = 4.440 PSI10 FEET = 4.330 PSI
INSTRUCTIONS: LUBELL LABS VC2C UNDERWATER SPEAKER

CALIBRATION OF LUBELL VC2C AT NUWC DODGE POND TUESDAY FEBRUARY 10 2009 10:03:40 AM
Lubell VC2C Se 50 Hz to 2 kHz 12_5 psi 28 ft depth 20 V drive
Frequency Transmit Transmit Real Z Phase TVR TCR SPL
kHz Voltage Current Power Magnitude (Z) dB// dB//
volts amps watts ohms deg uPa/volt uPa/amp dB//uPa
0.050 20.04 4.60 84.49 4.36 23.44 128.83 141.62 154.87
0.055 20.05 4.71 85.98 4.26 24.40 131.22 143.80 157.26
0.060 20.04 4.58 82.80 4.37 25.57 132.04 144.86 158.08
0.065 20.03 4.51 79.96 4.44 27.69 132.85 145.80 158.88
0.070 19.94 4.20 73.61 4.75 28.36 134.51 148.05 160.50
0.075 20.03 4.44 75.77 4.51 31.61 135.29 148.37 161.32
0.080 19.97 4.02 67.84 4.96 32.45 136.10 150.01 162.10
0.085 20.04 4.45 75.38 4.50 32.33 136.64 149.71 162.68
0.090 19.96 3.56 55.08 5.60 39.24 140.16 155.13 166.17
0.095 19.95 3.30 53.34 6.05 35.82 142.57 158.21 168.57
0.100 20.05 3.04 54.68 6.61 26.08 143.39 159.79 169.43
0.105 20.06 2.83 51.17 7.08 25.85 145.00 162.00 171.05
0.110 20.05 2.60 49.25 7.70 19.44 145.78 163.51 171.83
0.115 19.96 2.56 48.75 7.79 17.55 147.33 165.17 173.34
0.120 19.94 2.80 54.90 7.11 10.76 147.13 164.17 173.12
0.125 20.05 2.40 47.38 8.36 10.11 145.06 163.50 171.11
0.130 20.06 3.32 66.31 6.04 5.63 146.60 162.22 172.65
0.135 20.05 3.07 60.38 6.53 11.32 148.18 164.48 174.23
0.140 19.97 3.62 71.08 5.51 10.67 146.44 161.27 172.45
0.145 19.98 3.85 75.36 5.20 11.38 146.51 160.82 172.52
0.150 20.06 4.08 78.54 4.92 16.21 145.84 159.67 171.88
0.155 20.05 3.91 77.25 5.13 9.88 145.66 159.86 171.71
0.160 19.96 4.27 79.04 4.68 21.83 145.06 158.46 171.06
0.165 19.95 4.44 83.47 4.49 19.67 143.16 156.21 169.16
0.170 20.03 3.88 71.56 5.16 23.09 143.98 158.24 170.02
0.175 19.95 4.08 73.84 4.89 25.02 142.05 155.83 168.05
0.180 20.01 3.99 75.59 5.02 18.68 141.47 155.49 167.50
0.185 19.94 3.70 67.13 5.39 24.54 142.04 156.68 168.04
0.190 18.52 3.53 65.34 5.25 0.21 142.69 157.09 168.04
0.195 20.03 3.88 67.18 5.16 30.26 140.80 155.05 166.83
0.200 20.05 3.85 65.95 5.21 31.29 140.21 154.55 166.26
0.200 19.98 3.44 57.73 5.80 32.88 140.94 156.21 166.95
0.220 19.94 3.33 57.64 5.98 29.87 137.90 153.44 163.90
0.240 19.97 3.38 52.77 5.92 38.48 139.13 154.57 165.14
0.260 19.94 3.12 50.62 6.38 35.67 134.84 150.94 160.84
0.280 20.07 3.27 53.23 6.14 35.81 136.50 152.26 162.55
0.300 19.92 2.81 43.65 7.10 38.68 135.65 152.67 161.63
0.320 20.05 2.88 45.95 6.97 37.26 136.85 153.71 162.89
0.340 20.03 2.74 43.56 7.31 37.53 135.82 153.09 161.86
0.360 20.06 2.71 44.38 7.41 35.16 134.86 152.26 160.91
0.380 19.99 2.59 39.16 7.71 40.91 134.13 151.87 160.14
0.400 20.07 2.59 41.25 7.75 37.48 133.86 151.64 159.91
0.420 20.01 2.48 36.29 8.07 42.98 134.21 152.35 160.23
0.440 19.99 2.53 38.04 7.90 41.28 133.24 151.19 159.26
INSTRUCTIONS: LUBELL LABS VC2C UNDERWATER SPEAKER

CALIBRATION OF LUBELL VC2C AT NUWC DODGE POND TUESDAY FEBRUARY 10 2009 10:03:40 AM
Lubell VC2C Se 50 Hz to 2 kHz 12_5 psi 28 ft depth 20 V drive
Frequency Transmit Transmit Real Z Phase TVR TCR SPL
kHz Voltage Current Power Magnitude (Z) dB// dB//
volts amps watts ohms deg uPa/volt uPa/amp dB//uPa
0.460 20.03 2.33 33.82 8.61 43.50 134.15 152.84 160.18
0.480 20.06 2.24 32.74 8.94 43.36 133.75 152.78 159.80
0.500 19.94 2.10 28.01 9.50 48.03 133.46 153.01 159.46
0.500 20.04 2.31 33.08 8.66 44.46 133.56 152.31 159.59
0.550 19.94 1.93 26.21 10.36 46.95 132.91 153.21 158.90
0.600 19.97 2.01 28.20 9.93 45.36 132.43 152.37 158.43
0.650 19.98 1.93 26.79 10.38 45.86 131.18 151.51 157.20
0.700 20.06 1.80 26.39 11.12 43.17 129.87 150.79 155.91
0.750 19.97 1.82 22.89 10.98 50.92 130.35 151.16 156.36
0.800 20.08 1.70 22.71 11.84 48.16 130.25 151.72 156.31
0.850 19.96 1.59 21.58 12.58 47.05 129.87 151.87 155.88
0.900 19.99 1.57 20.95 12.72 48.16 130.58 152.67 156.59
0.950 19.96 1.56 20.61 12.76 48.68 131.17 153.29 157.17
1.000 20.01 1.50 19.36 13.34 49.82 131.14 153.65 157.17
1.050 20.04 1.48 20.21 13.57 46.93 130.77 153.42 156.80
1.100 19.95 1.40 18.98 14.24 47.21 130.45 153.52 156.45
1.150 20.02 1.40 18.89 14.31 47.61 130.85 153.96 156.87
1.200 19.96 1.32 17.55 15.17 48.10 131.97 155.59 157.98
1.250 19.95 1.28 17.19 15.55 47.81 133.87 157.70 159.86
1.300 20.00 1.24 16.79 16.18 47.22 135.25 159.44 161.27
1.350 19.95 1.25 16.72 16.00 47.76 136.23 160.31 162.23
1.400 19.97 1.20 16.34 16.58 47.20 135.44 159.84 161.45
1.450 19.97 1.18 16.16 16.89 46.81 134.56 159.12 160.57
1.500 19.99 1.17 16.25 17.07 46.02 133.43 158.08 159.45
1.550 20.05 1.15 15.48 17.41 47.90 131.27 156.09 157.31
1.600 20.03 1.13 14.83 17.78 48.91 128.19 153.19 154.22
1.650 20.02 1.12 15.24 17.81 47.39 124.33 149.35 150.36
1.700 20.02 1.10 14.95 18.25 47.11 119.52 144.75 145.55
1.750 20.00 1.08 14.63 18.54 47.32 113.42 138.78 139.44
1.800 19.99 1.06 14.44 18.83 47.12 109.34 134.84 135.35
1.850 19.98 1.03 14.03 19.31 47.30 110.54 136.25 136.55
1.900 19.92 1.03 13.71 19.30 48.19 111.51 137.22 137.49
1.950 20.02 1.01 13.72 19.77 47.44 111.53 137.45 137.56
2.000 20.02 1.00 13.44 20.08 47.66 111.11 137.16 137.14
INSTRUCTIONS: LUBELL LABS VC2C UNDERWATER SPEAKER

INSTRUCTIONS: LUBELL LABS VC2C UNDERWATER SPEAKER

INSTRUCTIONS: LUBELL LABS VC2C UNDERWATER SPEAKER

INSTRUCTIONS: LUBELL LABS VC2C UNDERWATER SPEAKER