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1) INTRODUCTION
The MDT-2238A model is a Contact/Photo Tachometer
for RPM measurement and m/min, compact, with 5
digits display and easy to use. Composed by exclusive
microprocessor with crystal time base, to offer the high
accuracy measurement and fast measuring time. Use
long life components with light weight and strong plastic
housing, providing excellent performance, without mainte
-
nance for many years. It has a large measurement range
of 0.5 to 20000 RPM(contact mode) and of
2.5 a 100000
RPM(photo mode)
and automatic storage function for
maximum and minimum values, and also for last reading,
through “MEM” button.
2) SAFETY INFORMATION
It is recommended that the user read the safety and ope
-
ration instructions before using the instrument.
WARNING
•
Never take measurement with the instrument in the
following cases: the tachometer or its accessories are
damaged; after storing the instrument in abnormal
conditions (explosive atmospheres, inflammable gases,
smoke, vapor or dust); or with the instrument opened.
•
Never exceed the measurement limits of the instrument.
•
The maintenance, parts replacement and calibration
