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EXTECH Vibration Meter and Laser Combination Tachometer Model 461880 User's Manual and Instructions for Use

Summary

The Extech 461880 is a professional diagnostic tool combining advanced vibration measurement and high-precision laser tachometry. It accurately measures acceleration, velocity, and displacement while providing comprehensive contact and non-contact RPM readings up to 100,000. This manual serves as your essential guide for operation, covering everything from connecting the specialized probe and utilizing its datalogger functions to selecting optimal measurement modes (RMS/Peak) for reliable industrial diagnostics. It is designed for maintenance engineers, technicians, and industrial inspectors requiring precise machine condition monitoring.

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User's Guide

Vibration Meter and Laser Combination Tachometer Model 461880

Page Summary Contents For EXTECH Vibration Meter and Laser Combination Tachometer Model 461880 User's Manual and Instructions for Use

Page 1 User's Guide Vibration Meter and Laser Combination Tachometer Model 461880
Page 2 Introduction Congratulations on your purchase of the Extech 461880 Vibration Meter and Combination Laser Tachometer. The 461880 Vibration functions have a frequency sensitivity that meets ISO-2954, an...
Page 3 Meter Description 1. Meter Top (see Meter Top Callout below) 2. LCD display 3. Tachometer Function pushbutton 4. HOLD/ESCAPE pushbutton 5. Power pushbutton 6. ENTER/RECORD pushbutton 7. FUNCTION/SEND ...
Page 4 Vibration Meter Operation Connecting Probe 1. Note that this meter accepts only the supplied vibration probe. 2. Plug the BNC connector end of the probe cable onto the BNC connector at the top of the ...
Page 5 Powering the meter 1. Press the POWER key once to power the meter On. The meter will perform a short self-test. 2. Press and hold the POWER key to power the unit Off. The unit will beep and display OF...
Page 6 ZERO Adjustment Procedure The meter may not indicate zero with no signal applied to the meter (no vibration). Although this is usually not a problem, this procedure will bring the meter within a few d...
Page 7 Tachometer Operation Safety WARNING: Do not directly view or direct the laser pointer at an eye. Low power visible lasers do not normally present a hazard, but may present some potential for hazard if...
Page 8 CONTACT TACHOMETER RPM MEASUREMENTS 1. Remove the Tachometer Protective Cover by loosening the screw and gently pulling the cap away from the unit. 2. Install one of the RPM contact tips (stored insid...
Page 9 Datalogging The internal datalogger memory can hold up to 1000 readings. Readings can be logged manually, with a button press, or automatically, at a programmed sample rate. Sample Rate The sample rat...
Page 10 PC Interface The meter is equipped with an RS-232 serial data port (located at the top of the meter next to the probe input jack). This interface was designed to operate with the optional Extech 40700...
Page 11 Vibration Functions Accuracy Range Resolution (% of reading) 0.5 to 199.9m/s2 0.1m/s2 Acceleration ±(5% + 2 digits) (RMS or Peak) 0.05 to 20.39G 0.01G @160HZ&80HZ 2 to 656ft/s2 1ft/s2 Calibration ...
Page 12 Warranty EXTECH INSTRUMENTS CORPORATION (A FLIR COMPANY) warrants this instrument to be free of defects in parts and workmanship for one year from date of shipment (a six month limited warranty applie...

Manual Details

Brand Laser
Pages 12
File Size 216.08 KB
Published May 29, 2026
56 views

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Frequently Asked Questions

What types of measurements can the 461880 take?

It measures Acceleration, Velocity, and Displacement (vibration); it also handles contact/non-contact RPM and Linear Surface Speed using its tachometer function.

How can I connect the vibration probe to machinery?

You can attach the magnetic end to ferrous material, hold the probe manually against the equipment, or unscrew the magnet for threaded connection to a stud or bolt.

What are the available measurement modes (RMS, Peak, etc.)?

Options include RMS (typical), PEAK (for peak value), and PEAK MAX HOLD; Displacement offers options like MAX HOLD.

How often should I have the meter calibrated?

Extech recommends that annual calibrations be performed to verify the meter's performance and accuracy.