Bently Nevada 330780-90-00 5mm Reverse Mount Probe Installation Guide
Product Introduction
The Bently Nevada 330780-90-00 features a reverse mount design. This design allows through‑bolt installation from the back of the casing. Specifically, the 330780-90-00 has a 5mm tip diameter. The probe body uses stainless steel construction. Moreover, this model includes an integrated connector at the casing end. Many compressors and turbines use the 330780-90-00 for radial vibration monitoring.
Core Value
Firstly, the 330780-90-00 simplifies installation in tight spaces. You mount the probe from outside the machine casing. Secondly, this probe reduces downtime during replacement. Therefore, maintenance crews access the probe without disassembling internals. Thirdly, the Bently Nevada 330780-90-00 provides high linearity. The probe measures from 0.25mm to 2.25mm gap range. Besides, the reverse mount design prevents cable damage during installation.
Technical Insights
The Bently Nevada 330780-90-00 operates with 3300 XL proximitors. Specifically, the system requires a -24V DC power supply. The probe's sensitivity is 7.87 mV/µm. Moreover, the 330780-90-00 uses a 5mm threaded case. Thread size is 1/4-28 UNF. The cable length is 5 meters standard. Furthermore, the operating temperature ranges from -35°C to +177°C. The probe tip material is PPS. Meanwhile, the 330780-90-00 meets API 670 standards for vibration monitoring.
Installation & Maintenance
Firstly, clean the probe tip and mounting hole thoroughly. Use a non‑conductive gap setting tool for the 330780-90-00. Secondly, thread the probe through the casing hole. Tighten the locknut to 3.4 Nm torque. Thirdly, connect the probe cable to the 3300 XL proximitor. Verify the air gap at 1.27mm for center position. Therefore, use an oscilloscope to check the DC gap voltage. For maintenance, inspect the probe tip for debris annually. Besides, never pull the probe cable directly. Always use the connector body.
Buyer’s Guide FAQ
Q1: What machines use the Bently Nevada 330780-90-00?
A1: The 330780-90-00 monitors steam turbines, compressors, and centrifugal pumps. Specifically, reverse mount fits bearing housings.
Q2: Does the 330780-90-00 replace the 330730-90-00?
A2: No. The 330780-90-00 uses a different thread and case length. Always verify your mounting depth.
Q3: What proximitor works with the 330780-90-00?
A3: Use the Bently Nevada 330180-90-00 5mm proximitor. Other models will not provide correct scaling.
Q4: How do I set the gap for 330780-90-00?
A4: Aim for -10.0 VDC output at 1.27mm gap. Use a calibrated micrometer to set the 330780-90-00 position.
Q5: Can I extend the cable on a 330780-90-00?
A5: No. Cable extension alters capacitance. This changes probe calibration. Order the correct length instead.
