Operating Instructions; Adjusting The Sound Velocity; Setting Probe Frequency; Preparing The Measurement Surface - REED R7900 Manuel D'utilisation

Operating Instructions

1. Insert the probe into the probe socket on the meter
2. Press the Power Button to turn the meter on
3. The LCD will briefly display information about the meter, and then
show the current set sound velocity

Adjusting the Sound Velocity

This instrument can display five sound velocities alternatively.
1. Press the Velocity Button and the meter will display the current
sound velocity
2. Press the Velocity Button to switch between the 5 set velocities,
and press the Up and Down Buttons to adjust the set value

Setting Probe Frequency

1. Press the Mode Button to highlight the Probe Frequency setting
on the LCD
2. Press the Enter Button to change the frequency setting between
5M, 7M, and ZW probe frequencies

Preparing the Measurement Surface

• Clean any dust, dirt, and rust off the object, and remove any cover
such as paint.
• Smooth the surface of the object by grinding or polishing it. You
can also use a coupling agent with a high viscosity.
• If the surface has a rough machined surface and cannot be
smoothed down, adjust the angle between the probe's crosstalk
interlayer plate (the metallic layer passing through the centre of
probe bottom) and the fine slots of the object that the interlayer
534 Blue
plate is perpendicular or parallel to. Take the minimum value of the
123 Yellow
readouts as the measured thickness.
485 Red
123 Yellow
534 Blue
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