PeakTech 1640 Bedienungsanleitung Seite 40

6.7. Frequency measurements
1. Set the rotary selector switch to the Hz% position.
2. Plug the black and red test leads into the COM and Hz input
terminals respectively.
3. Determine that the amplitude level of the signal to be
measured is not greater than the input voltage limit (250 V
AC/DC). The signal amplitude must also be greater than the
sensitivity level.
4. Attach the probe tips to the points across which the
frequency is to be measured, and read the result directly
from the display.
5. Disconnect the test leads.
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