Bently Nevada™ Seismoprobe Velocity Transducer Systems are designed to measure absolute (relative to free space) bearing housing, casing, or structural vibration. The two-wire systems consist of a transducer and appropriate cable.
The Seismoprobe family of velocity transducers uses moving-coil technology to provide a voltage output directly proportional to the transducer's vibration velocity. These transducers are less sensitive to impact or impulsive excitation than solid-state velocity transducers and don't require external power, making them convenient for portable measurement applications.
Interconnect cables are available in various lengths with or without stainless steel armor for connecting transducers to other instruments.
When ordering 9200 and 74712 Seismoprobe Velocity Transducers, expect approximately a six week lead time. Lead times may vary based on component availability and configuration. Contact your local Bently Nevada representative for projected lead times for your specific order.
Specifications are measured at approximately +22°C (+72°F) with 25 mm/s (1 in/s) of machine casing vibration at 100 Hz (6000 cpm) with a 10 kΩ load unless otherwise specified.
| Parameter | Specification |
|---|---|
| Sensitivity | 20 mV/mm/s (500 mV/in/s), ±5% when properly terminated and oriented at the angle of calibration |
| Calibration Load | 10 kΩ Terminal "A" to "B" Output taken across pins "A" and "B" |
| Sensitivity Temperature Coefficient | 0.2%/°C |
| Frequency Response | 4.5 to 1000 Hz (270 to 60,000 CPM); +0, -3dB typical 10 to 1000 Hz (600 to 60,000 CPM); +0, -3dB typical 15 to 1000 Hz (900 to 60,000 CPM); +0, -3dB typical |
| Dynamic Operating Range | 2.54 mm (0.100 in) peak to peak maximum displacement |
| Velocity Range | 25 mm/s (1 in/s) at +22°C of casing vibration at 100 Hz with a 10 kΩ load |
| Coil Resistance | 1.25 kΩ ±5% |
| Locked Coil Inductance | 125 mH, typical |
| Amplitude Linearity | ±5% from 0.01 to 5.0 in/s (0.254 to 127 mm/s) at 100Hz (6000CPM) |
| Shock Resistance | Withstands 50 g peak maximum acceleration along non-sensitive axis |
| Transverse Sensitivity | ±10% maximum of the sensitive axis sensitivity at 100 Hz and 1.0 in/s (2.54 cm/s) |
| Polarity of Output Signal | Pin A goes positive with respect to Pin B when the transducer case velocity is towards the connector |
| Lead Wire Length | 305 meters (1,000 feet) maximum between Seismoprobe Velocity Transducer and 3300 or Bently Nevada™ 3500 Monitor. Consult manual for frequency roll-off at longer lengths. |
| Parameter | Specification |
|---|---|
| Operating and Storage Temperature | 9200: -29°C to +121°C (-20°F to +250°F) 74712: -29°C to +204°C (-20°F to +400°F) |
| Environment | Dust and moisture resistant. Contact your Sales Professional regarding transducer operation in a radiation environment. |
| Relative Humidity | To 95%, noncondensing. 100%, non-submerged, when ordered with integral cable. |
| Maximum Use Altitude | 2000 m (6,561 ft) above sea level. |
Two-wire Transducer Ordering Format: 9200-AA-BB-CC-DD
| Option | Description |
|---|---|
| A: Transducer Mounting Angle/Minimum Operating Frequency Option | 01: 0 ±2.5, 4.5 Hz (270 cpm) 02: 45 ±2.5, 4.5 Hz (270 cpm) 03: 90 ±2.5, 4.5 Hz (270 cpm) 06: 0 ±100, 10 Hz (600 cpm) 09: 0 ±180, 15 Hz (900 cpm) |
| B: Connector/Cable Option | 01: Top Mount (no cable) 02: Side Mount (no cable) 05: Terminal block top mount (no cable) 10 through 50: Integral hardline cable Standard cable lengths: 10: 10 feet (3.0 meter) 15: 15 feet (4.6 meter) 22: 22 feet (6.7 meter) 32: 32 feet (9.8 meter) 50: 50 feet (15.2 meter) Other cable lengths between 7 feet and 50 feet may be available through custom products. |
| C: Mounting Base Option | 01: Circular; 1/4-20 UNC stud 02: Circular; 1/4-28 UNF stud 03: Rectangular flange 04: Circular; with three 8-32 threaded studs on a 44 mm (1.75 in) diameter bolt circle 05: No base; 1/2-20 UNF-3A stud 06: Isolated circular 1/4-20 UNC stud 07: Isolated circular 1/4-28 UNF stud 08: Isolated rectangular flange 09: Isolated circular 5/8-18 UNF stud 10: Circular; M10X1 stud 11: Isolated circular M10X1 12: Isolated circular 1/2-20 UNF-2A |
| D: Agency Approval Option | 00: No Approvals 01: CSA 04: ATEX/IECEx |
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