The 74712-01-10-02-00 is a Bently Nevada high-temperature Seismoprobe velocity transducer utilizing moving-coil technology to measure absolute structural vibration. Fully compatible with industrial monitoring systems, this unit works seamlessly with 3500 monitors to deliver high-temperature resistance and stable casing velocity measurements without requiring external power.
Competitive Advantage
- High-Temperature Resistance: Engineered to operate reliably in harsh environments from -29°C up to +204°C (+400°F).
- Self-Generating Design: Utilizes moving-coil technology which generates its own voltage signal and eliminates external power needs.
- Impulsive Shock Immunity: Inherently less sensitive to sudden impacts or impulsive excitation compared to solid-state alternatives.
- Flexible Interconnection: Features a top-mounted connector profile that simplifies routing in tight structural areas.
System Compatibility and Alternative Models
System Compatibility
- Interfaces directly with Bently Nevada 3300 or 3500 machinery protection monitors.
- Supports standard two-wire interconnecting cables up to 305 meters (1,000 feet) before experiencing frequency roll-off.
Alternative Models & Differences
- 9200-01-01-10-00: Standard temperature version rated up to +121°C instead of the high-temperature +204°C rating of the 74712.
- 74712-03-10-02-00: Designed for a 90° horizontal mounting orientation instead of the 0° vertical mounting.
- 74712-01-11-02-00: Features an electrically isolated M10x1 circular base to mitigate electrical ground loops.
Ordering Information Table
|
Designator |
Option Code |
Description |
|
Base Model |
74712 |
High-Temperature Seismoprobe Velocity Transducer |
|
A: Mounting Angle |
01 |
0° ±2.5° vertical mount, 4.5 Hz (270 cpm) min frequency |
|
B: Mounting Base |
10 |
Circular base with an integrated M10X1 metric stud |
|
C: Connector Profile |
02 |
Heavy-duty top-mounted orientation connector |
|
D: Agency Approval |
00 |
No hazardous area safety approvals included |
Installation & Troubleshooting FAQ
Q1: What is the significance of the 01 mounting angle option during field setup?
A: The 01 option specifies a vertical orientation (0° ±2.5°). Mounting the transducer beyond this threshold alters its internal alignment and invalidates the factory sensitivity calibration.
Q2: Why does the velocity transducer output generate a false vibration signal?
A: Loose mounting base contact or insufficient torque can cause mechanical looseness. Ensure the M10x1 stud is securely torqued to 5.6 N·m (50 in·lb) to maximize frequency response.
Q3: Can an integral hardline cable be added to this specific high-temperature transducer model?
A: No, integral hardline cable options are exclusively available for the 9200 standard temperature family and cannot be ordered with the 74712.
Accessories
| Part number | Description |
| 46000-01 | Magnetic Base for portable mounting of Seismoprobe Velocity Transducers |
| 46122-01 | Quick connect for semipermanent mounting of Seismoprobe Velocity Transducers. |
| 02173006 | Bulk cable; 2-conductor, twisted, shielded. 18 AWG (1.0 mm2) cable without connectors or terminal lugs. Specify number of feet. Withstands +200°C (+392°F). |
| 00531061 | Mating connector for 9200 and 74712 Seismoprobe Velocity Transducers. |
| 00530574 | Cable Mounting Clamp |





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