SDT International SDT170, User Manual

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17. External ultrasonic sensors
MAN.170.EN--04--SDT170-user-manual-Eng.docx 81/141
Rules to respect
In most circumstances, the contact probe is the best sensor to monitor a bearing.
To ensure the repeatability of the measurements taken with the contact probe, it is
imperative to follow the next rules.

Attach the needle correctly and connect the contact probe to the unit.

Always take a measurement by applying the top of the needle on the same
spot (possible marking with the awl to dimple the housing).

Maintain the contact on the vertical plane (perpendicular) of the measurement
point. Any oblique position should be avoided.

Apply about the same holding pressure on the probe.

Hold the button down for 3 to 4 seconds until stabilization of the
measurement is achieved.

Make sure that the appropriate functioning mode has been selected (Slow
mec, Mec or US).

Ideally, take the measurement when no arrow is displayed ( or ).
How to read the displayed data
The LCD display contains the same icons as described in previous paragraphs.
1. Type of sensor connected (here, a contact probe).
2. Selected mode (S, M or US).
3. Data (amount of ultrasonic sounds) is given in dBµV.
The specific icon with an ultrasonic contact probe.
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