SDT International SDT170, User Manual

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20. External non ultrasonic sensors
MAN.170.EN--04--SDT170-user-manual-Eng.docx 99/141
How to read the displayed data
The display indicates:
1. Decibel
A
: measure of the dBA.
2.
S
or
F
: Indicates the selected mode (Slow or Fast
– See
Chapter 12.3 ).
3.
dBA
: the data (level of ultrasonic sounds) is given in dBA.
The specific icon with a sound level meter.
049
20.2 T
ACHOMETER
Main applications
All linear or rotation measurements with or without contact of a mechanical or
electrical system, mainly for the control of mechanical units and predictive
maintenance.
Description
The SDT laser tachometer can be used separately as an individual unit or in
combination with the SDT 170 M 170 M , M+ or MD .
External view of the tachometer.
070
The SDT tachometer is an extremely versatile fully featured sensor, with a wide
selection of practical functions including revolutions per minute (rpm) and
revolutions per second (rps) both optically with a laser pointer and by contact
method, contact linear speeds, in feet, yards or meters per minute and per
second.
Special memory functions include maximum, minimum reading capture,
employing a unique dual time base for high speed data grabbing. Truly average
speed measurement mode is also standard, with time interval measurement for
reciprocal speeds and cycle timing, other features include revolution count and