Taking A Reading - Elcometer 205 Operating Instructions Manual

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3.5 FRONT PANEL LIGHTS
Green light illuminates when:
• The alarm mode is active, and
• the measured thickness is greater than the alarm value.
Red light illuminates when:
• The alarm mode is active, and
• the measured thickness is less than the alarm value.

4 TAKING A READING

Disclaimer: Inherent in ultrasonic thickness measurement is the possibility that the instrument will use the
second echo rather than the first echo from the back surface of the material being measured while in
standard pulse-echo mode. This may result in a thickness reading which is TWICE what it should be.
The responsibility for proper use of the instrument and recognition of these types of phenomenon rests
solely with the user of the instrument.
4.1 Before you start
• Set the zero point of the gauge.
See "Setting the zero point (probe-zero)" on page 16.
• Calibrate the gauge.
See "Calibration" on page 18.
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