Bently Nevada 177230-02-01-CN 4-20mA Sensor

Bently Nevada 177230-02-01-CN Seismic Transmitter

Product Introduction

The Bently Nevada 177230-02-01-CN seismic transmitter delivers reliable vibration monitoring for industrial rotating machinery. This device measures absolute vibration velocity using a ceramic shear sensing element. It then outputs a proportional 4-20 mA current loop signal. Therefore, it integrates seamlessly with PLCs, DCS, and SCADA systems. Many plants choose the Bently Nevada 177230-02-01-CN for its robust design. Specifically, its 316L stainless steel case withstands up to 100 percent non-submerged humidity. Furthermore, this model supports a measurement range of 0 to 50.8 mm/s (0 to 2.0 in/s) peak. The frequency response spans from 10 Hz to 1 kHz for RMS values.

Technical Specifications

The Bently Nevada 177230-02-01-CN operates on a 12 to 30 Vdc excitation voltage. Current limiting stays at 40 mA maximum. Additionally, the main loop sensitivity features 4 ± 0.3 mA at 0.0 mm/s. It reaches 20 ± 2 mA at full scale range. The full scale range option ( -AA 01) is 25.4 mm/s (1.0 in/s) ± 10 percent. Frequency response ( -BB 02) covers 3 Hz to 1 kHz ± 10 percent (180 cpm to 60 kcpm). Settling time is less than 15 seconds within 2 percent of final value. Mounted resonant frequency exceeds 12 kHz. Transverse sensitivity stays below 5 percent of sensitivity. The sensing element uses a ceramic and shear design.

Mechanical and Environmental Limits

For mechanical parameters, the Bently Nevada 177230-02-01-CN has a diameter of 25.4 mm (1.00 in). Height measures 66.0 mm (2.60 in). Case material is 316L stainless steel. Weight is typically 131 g (4.62 oz). The mounting hole in the body uses 1/4-28 UNF threads. Other mounting options include M6 X 1 SI and M8 x 1.25 SI. Mounting torque should be 4 to 7 N-m (35.4 to 62.0 in-lbf).

For environmental limits, the operating temperature ranges from -40°C to +85°C (-40°F to +185°F). Shock survivability is 9.810 m/s² (1.000 g peak) for maximum drop test. The sensor seal is hermetically sealed. Relative humidity of the transmitter reaches up to 100 percent non-submerged. Magnetic field sensitivity is less than 20 μm/s/gauss (790 μin/s/gauss) peak.

Frequently Asked Questions (FAQ)

1. What systems work with the Bently Nevada 177230-02-01-CN?
   This transmitter works with PLCs, DCS, and SCADA systems. These systems must have internal power supplies current limited to 30-35 mA.

2. Can I use this transmitter in wet environments?
   Yes, it handles up to 100 percent relative humidity when not submerged. However, do not immerse it in liquid.

3. How do I know the output signal is correct?
   At zero vibration, Pin A to Pin B should read 4 ± 0.3 mA. At full scale (25.4 mm/s), it should read 20 ± 2 mA.

4. What is the dynamic signal on Pin C for?
   Pin C provides an unbuffered dynamic acceleration signal. Use it for detailed vibration analysis. Reference this signal to Pin B.

5. Is the Bently Nevada 177230-02-01-CN suitable for high temperatures?
   Yes, its operating temperature ranges from -40°C to +85°C (-40°F to +185°F). This makes it suitable for most industrial environments.