Measuring (Injection) Time; Measuring Using The ''Λ '' Probe - Facom 714 Guía De Instrucciones

Note: Considering the signal's interference, a cyclic ratio may be shown both as T+ and T-.
Here, at T+ the tester indicates the direct ratio,
T2
ratio,
T1+T2
To view the minimum and maximum values for the current reading, press the "MIN/MAX"
key several times.
CHARACTERISTICS OF THE CYCLIC RATIO MEASUREMENT
Min input voltage
Max input voltage
Min. frequency
Max. frequency
Display range
Operating domain
Measurement domain
Intrinsic error
Resolution
Measuring the (injection) time
• Connect the input terminal cords, with the reference potential connected to the "COM"
terminal.
• Set the rotating switch to "%", and press the yellow key.
• The "ms" unit symbol appears, and the digital display indicates the value for the injection
time, provided the signal's polarity matches the trigger level chosen (displays "T+" by
default).
• Otherwise, the cyclic ratio value is undetermined (display :
blinks.
• If so, change the trigger level sign (display "T-") by pressing the appropriate key.
If the display still indicates
measurement domain.
To view the minimum and maximum values for the current reading, press the "MIN/MAX"
key several times.
Measuring with the «λ λ λ λ λ » probe
• Connect the probe to the tester while respecting polarity.
• Set the rotating switch to the "λ" position: the "λ" symbol appears.
• The digital display then indicates the current value expressed in Volt.
• Press the MIN/MAX key.
• The "MIN" and "MAX" appear, as well as the bargraph scale: opposite this scale, the bar
ribbon moves according to the variation in the current's value, between the MIN and MAX
values for each variation cycle, indicated by the MIN and MAX bars lit.
• The digital display still indicates the current value averaged over 1 second. Press again to
resume a measurement cycle. Press and hold the MIN/MAX key to quit the MIN/MAX
function, and the bargraph disappears.
• After changing the probe, reset the bargraph by pressing the key.
T1
T1+T2
3 V
80 V
10 Hz
Note 1: If the frequency is not within the
1000 Hz
measurement range, the display indicates an
100
invalid measurement; i.e. «
0 - 100%
5 - 95%
Note 2: If the voltage is not within the
1% +1 pt
measurement range, the display shows "OL".
1%
, this means the signal's frequency is outside the tester's
and in T- it indicates the reverse
), and the "T+" symbol
».
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