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Technical data
Measuring range 20 to 20000 rpm
0.33 to 333 Hz
Accuracy ± 1 digit in all ranges
Display Two lines (rpm/frequency)
4 digit LCD
Frequency • from final value to
range fiinal value:<15 s
adjustment • Conversion begins slowly
and becomes exponentially
faster if the key is kept pressed
External input • TTL, protected
against over-voltage
• the flashlight frequency is
automatically switched over when a
square wave signal is set up
External output TTL, protected
against short-circuits
Standby automatic locking
(can be switched off) of the ignition pulses
from the flash tubes,
if no frequency correction
is undertaken for 33 s
Auto Off the instrument is automatically
switched off when the instrument is on
standby for approx. 17 min (batt. protection)
Battery protection 6 NiCd batt 1.2 V / 600 mAh
Battery life approx. 30 min for 90%
charged batteries and
maximum flashlight frquency
Mini stroboscope testo 475
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