User Manual

24 GMC-I Messtechnik GmbH
14 Frequency and Duty Measurement (METRALINE DM 62 only)
14.1 Frequency Measurement
• Set the function selector switch (6) at „Hz“
• The multimeter switches to frequency measurement. The
frequency is displayed on the main display and duty cycle
is displayed on the sub-display. See section 16 for the low-
est measurable frequencies and the maximum permissible
voltages.
• Connections are established in the same way as for volt-
age measurement.
14.2 Duty Cycle Measurement
With duty cycle measurement, the user can determine the ratio
of pulse duration to cycle time of recurring square-wave sig-
nals.
• Set the function selector switch (6) at „Hz“.
• The multimeter switches to frequency measurement. The
frequency is displayed on the main display and duty cycle
is displayed on the sub-display.
• The duty cycle (i.e. the percentage pulse duration of a sig-
nal) is displayed on the LCD in %
•That is:
Note
• The applied frequency must remain constant during duty
cycle measurement.
Duty cycle (%) =
Pulse duration
Cycle duration
x 100