Extech 407860 Operating Manual

User Guide

Heavy Duty Vibration Meter

Model 407860

Introduction

Congratulations on your purchase of the Extech 407860 Vibration Meter. The Model
407860 measures vibration levels in industrial machinery. Misalignment, poor balancing,
structural compromises, and other factors can cause unwanted vibration increases. The
Model 407860 has a frequency sensitivity that meets ISO-2954 and offers Displacement,
Velocity and Acceleration features. This meter is shipped fully tested and calibrated and,
with proper use, will provide years of reliable service.

Meter Description

1. Probe connector

2. RS-232 Connector

3. LCD Display

4. Function switches and pushbuttons

5. Probe

6. Magnetic base

7. Protective rubber meter jacket

8. Battery compartment (on rear)

Meter LCD Display

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Meter Operation

Connecting the 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 meter.

3. The probe can then be connected to the tested machinery in three ways.
a. Attach the magnetic end of the probe to a ferrous material on the equipment under

test as shown in the accompanying diagram.

b. Manuallyhold the probe in place against the equipment under test as shown.

c. Unscrew the magnet from the probe end (as shown in the diagram) and use the

threaded mount to connect to a screw, bolt, or stud on the equipment under test.

POWER button and Auto Power OFF feature

1. Press the POWER button to turn the meter ON. If the meter does not turn on, check
the 9V battery.

2. To turn the meter off, press and hold the POWER button until the meter beeps.

3. The meter is equipped with an Automatic Power OFF utility that conserves battery life.
If the meter is left inactive for 10 minutes it will automatically turn off.

Note: Automatic Power OFF utility is disabled in the RECORD mode.

FUNCTION button

Press the FUNCTION button to select RMS, PEAK or MAX-HOLD.

1. RMS - Typical selection for vibration measurements

2. PEAK – For measurement of the peak value. Not available in the Displacement

mode.

3. MAX_HOLD – Holds and displays the maximum value. The display will update only

when a new maximum is measured. Not available in the Displacement mode.

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