Bently 177230 seismic transmitter



Bently 177230 seismic transmitter

Product Overview

Core functions

The 177230 earthquake transmitter is a simple loop powered device that can be quickly and easily installed, and can be integrated into a programmable logic controller (PLC) or control system connected to a factory asset status monitoring solution. Its design aims to help users better manage downtime, optimize maintenance plans, and avoid unexpected catastrophic failures of mechanical assets.

Main features 

Easy to install and integrate: compatible with control systems such as PLC, DCS, and SCADA, with a short learning curve for operation and maintenance, no need for on-site configuration or adjustment, minimal additional components required, technical support provided, self checking function and protected interfaces, and support for multiple interface cables.

High data quality: providing accurate and reproducible data, using a simple data format, and providing raw vibration signals for verification and analysis.

Compliant with EHS standards: Designed with safety ergonomics to support entry into hazardous areas.

Technical specifications

1. Electrical parameters

Excitation voltage: 12 to 30 Vdc (current limited to 40 mA), suitable for PLC, DCS, and SCADA systems with internal power sources and current typically limited to the range of 30 mA to 35 mA.

Stable time: less than 15 seconds within 2% of the final value.

Installation resonance frequency: greater than 12 kHz.

Lateral sensitivity: less than 5% of sensitivity.

Sensor element type: ceramic/shear type.

Connector wiring specifications:

Pin A: 4-20 mA positive loop (positive relative to pin B).

Pin B: The 4-20 mA loop return (the negative loop return of pin A and the common terminal of the dynamic signal) needs to be isolated from any ground, otherwise the 4-20 mA loop will short circuit and result in no output.

Pin C: Dynamic acceleration signal (not buffered, refer to pin B).

Speed output:

Output signal: 4 to 20 mA current loop from pin A to pin B.

Full scale range (- AA): 00 is 0-12.7 mm/s (0.5 in/s) ± 10%; 01 is 0-25.4 mm/s (1.0 in/s) ± 10%; 02 is 0-50.8 mm/s (2.0 in/s) ± 10%, all of which are broadband RMS (root mean square) full-scale.

Frequency response (- BB): 01 is 10 Hz to 1 kHz (600 cpm to 60 kcpm) ± 10%, and the output signal is proportional to the RMS vibration level; 02 is 3 Hz to 1 kHz (180 cpm to 60 kcpm) ± 10%, and the output signal is proportional to the peak vibration level.

Acceleration output:

Output signal: Unbuffered voltage from pin C to pin B (reference).

Sensitivity: 10.2 mV/m/s ² (100 mV/g) ± 20%.

Full scale range: 147 m/s ² (15 g) peak.

Frequency response: 2.5 Hz to 10 kHz (150 cpm to 600 kcpm) ± 10%.

Linearity: ± 1% of full scale.

Output bias: 2.5 V ± 0.1 V (refer to pin B).

2. Environmental restrictions

Working temperature: -40 ° C to+85 ° C (-40 ° F to+185 ° F).

Electrical isolation: greater than 10 ohms.

Isolation breakdown voltage: 600 Vrms, leakage current less than 1 mA.

Impact bearing capacity: 9.810 m/s ² (1.000 g peak), maximum drop test. If a magnetic base is used during installation, it is necessary to avoid "popping" the device onto the machine. Rolling the magnetic base can reduce the damage of peak signals to electronic devices.

Sensor sealing: airtight packaging.