Preparing For Measurements - Extech Instruments RPM33 User Manual

Preparing for Measurements
Non‐Contact (Photo) Tachometer Preparation
1. Apply a square piece of reflective tape to the surface of the object under test (nominal tape
size: 0.5"/12mm). Be sure to affix the tape as close to the outer edge of the object under test
as possible. See diagram below.
2. If not already done, unscrew and remove the meter collar (item number 3 in the Description
section diagram)
3. Proceed to the "Taking Measurements" section below.
Contact Tachometer Preparation
1. If not already done, attach the collar (item number 3 in the Description section diagram) to
the meter.
2. Slide the contact adaptor onto the tachometer's shaft. Be sure to align the adaptor with the
alignment pin on the shaft of the contact adaptor.
3. Attach a contact measurement accessory (cone, wheel, or concave accessory) onto the
contact adaptor.
4. For Contact operation the meter can measure Surface Speed or Length. Read the section
titled "Surface Speed and Length Measurement Modes" later in this guide for details.
5. Follow the steps in the "Taking Measurements" section below.
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