How are the various quantities measured?
34 100,000 cts digital multimeters
How are the various quantities measured? (continued)
1. Duty Cycle
or duty cycle,
positive DCY+ or
negative DCY-
Display of the measurement in % of a logical signal (TTL, CMOS, etc.)
DCY+ duty cycle =
DCY- duty cycle = T -
The DCY duty cycle mode is optimized to
measure the active or inactive intervals of
switching signals or logical signals.
Electronic fuel injection systems and
switching power supplies, in particular, are
controlled by pulses of variable width that
can be verified by a duty cycle
measurement.
2. CNT+ and CNT-
or positive
or negative
pulse counting
Depending on the triggering conditions of
the frequency counter, calculation of the
positive or negative pulses
Minimum pulse duration 5µs
Counting up to 99999
Triggering threshold 10% of range
except for range 1000 VAC
This threshold is positive in , negative in
Reset of CNT by long press on MEAS…
For negative events, cross the leads.
The pulse width function measures the
duration during which the signal is low or
high. The waveform measured must be
periodic; its curve must repeat at intervals of
equal duration.
3. PW+ and PW-
or positive
or negative
pulse width
Depending on the triggering conditions of
the frequency counter, measurement of the
pulse width in ms.
Resolution 10µs
Minimum pulse width 100µs
Accuracy 0.05% 10µs Maximum duration
of a period 12.5s
Triggering threshold 20% of the range
except for the 1000 VAC range
For negative events, cross the leads.
www.ShopAEMC.ca
Shop for AEMC products online at:
1.800.561.8187
To Next Page
Loading...
