70M303 Bently Nevada Triaxial Accelerometer

Configured for triaxial vibration and surface temperature acquisition within Ranger Pro wireless condition monitoring networks, the Bently Nevada 70M303 (70M303 Triaxial Accelerometer) provides direct physical/electrical execution. It acquires 3-axis acceleration and integral thermal metrics, processing dynamic high-frequency signals for wireless transmission to plant host infrastructure.

Hardware Specifications

Eddy-Current Probe Scaling and Rotor Dynamics Integration

While proximity transducers depend on eddy-current probe scaling and strict gap voltage validation (-10 VDC targets) for relative shaft position, the Bently Nevada 70M303 captures absolute casing vibration across three orthogonal axes. These acceleration vectors are processed through internal digitizers to complement proximity readings during rotor dynamics analysis. Integrating high-frequency triaxial surface data (up to 20 kHz) with low-frequency proximity telemetry ensures high cross-talk suppression and full fault isolation across both housing structures and rotating shafts.

Frequently Asked Questions

Q: How is the physical interface attached during field deployment of the 70M303 transducer?

A: The base features an integral M6 x 1 mm internal thread (5 mm depth) designed for direct mounting onto rigid, tapped stud locations on bearing housings.

Q: What impact does operating mode have on the current draw of the 70M303 module?

A: Current consumption varies dynamically between 30 uA in low-power sleep states and 30 mA during active measurement acquisition and wireless data transmission cycles.

Q: Can the 70M303 survive high impact or harsh vibration environments during operation?

A: The sensor features a shock resistance rating capable of surviving a 0.5-meter drop onto concrete, a continuous vibration limit of 20g peak, and a 316 stainless steel enclosure rating for hazardous area use.

Field Installation Guidelines

• Prepare a flat, smooth mounting surface on the bearing housing and secure the sensor via its internal M6 x 1 mm thread, torquing to proper mechanical specification.
• Ensure direct metal-to-metal base contact without excess thread compound to maintain frequency response accuracy up to 20 kHz.
• Verify unobstructed line-of-sight orientation toward the wireless gateway to optimize the transmission range up to 150 meters.
• Inspect the glass-reinforced PPS top cover and stainless steel housing seals prior to installation in hazardous or outdoor environments up to 3,000 meters altitude.