Introduction
The 16710-15 is a seismic vibration transmitter or vibration switch designed for continuous monitoring of machine casing vibration (velocity). This robust, self-contained unit typically contains a built-in piezoelectric velocity sensor and integrated electronics that convert the mechanical vibration into a standardized 4-20 mA output signal proportional to the vibration level. Many models also include adjustable setpoints that trigger internal relays to activate alarms or initiate machinery shutdowns when vibration exceeds predefined limits. Its primary purpose is to protect critical assets from damage due to excessive vibration caused by imbalance, misalignment, bearing failures, or other mechanical issues.
Technical Parameters
The following table outlines the typical technical specifications for a device like the Metrix 16710-15 Vibration Transmitter/Switch.
| Parameter Category | Specification |
|---|---|
| Part Number | 16710-15 |
| Description | 4-20 mA Vibration Transmitter with Switch / Relay |
| Physical Dimensions | Body Diameter: ~ 65 mm (2.56 in) Height: ~ 110 mm (4.33 in) (Dimensions can vary based on specific model and connector orientation) |
| Weight | Approximately 1.0 kg (2.2 lbs) |
| Measurement Type | Velocity (Peak or RMS) |
| Frequency Range | 10 Hz to 1000 Hz (600 to 60,000 CPM) |
| Output Signal | Two-Wire 4-20 mA loop power, scaled to a specific range (e.g., 0-25 mm/s or 0-1.0 in/s) |
| Relay Outputs | Typically 2 or 3 SPDT (Form C) relays for Alert and Danger setpoints |
| Power Supply | 12 to 30 VDC (Standard for 4-20 mA loop-powered devices) |
| Mounting | 1/4-28 UNF or M10 threaded stud on the base |
| Electrical Connection | Conduit entry with terminal block or a multi-pin connector |
| Housing Material | Cast Aluminum or Stainless Steel (explosion-proof enclosures are common) |
| Operating Temperature | -40°C to +85°C (-40°F to +185°F) |
*Note: These specifications are representative of this class of vibration transmitter/switch. The exact values, especially relay configuration and setpoint ranges, are defined by the "-15" suffix. Always consult the official manufacturer's datasheet for the precise model.*
Application Scenarios
This device is used for machinery protection on a wide range of rotating equipment where a simple, reliable, and continuous vibration signal is required for control and safety systems.
Pump Protection:
Mounted on centrifugal and positive displacement pumps in chemical plants, water treatment facilities, and pipelines to monitor bearing condition and detect issues like cavitation or imbalance, triggering an alarm or trip before severe damage occurs.
Motor Monitoring:
Installed on critical AC and DC motors driving fans, compressors, and conveyors. The 4-20 mA signal provides a continuous health indicator to the plant's DCS, while the internal relays provide a direct safety interlock.
Fan and Blower Monitoring:
Used on large industrial fans, such as those in cooling towers or boiler systems, to detect bearing wear, imbalance, and structural resonance problems.
Compressor Monitoring:
Applied to reciprocating and rotary compressors to monitor casing vibration levels that can indicate mechanical looseness, valve issues, or other dynamic problems.
General Rotating Machinery:
An ideal solution for any non-critical or auxiliary rotating machine where a full proximity probe system is not justified, but basic vibration protection and monitoring are still required for operational reliability.
In summary, the 16710-15 is a versatile and robust vibration transmitter and switch that serves as a fundamental building block for machinery protection systems, helping to prevent catastrophic failures and enable predictive maintenance across various industries.
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