Fluke 1773 Product Manual - Page 35

Transients., Trigger On, Rapid Voltage Changes., Inrush Current.

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1773/1775/1777 Users Manual Transients. If the model in use includes the transient feature, the trigger settings consist of High, Medium, and Low. These settings are on values that are equivalent of 200 %, 100 % and 50 % of the nominal voltage superimposed on the voltage waveform at any point during the cycle. In addition, there is a user selectable custom setting expressed as an absolute voltage. With the 1777 Analyzer, select the sample rate of the transient capture as either 1 MHz or 20 MHz. The 1775 Analyzer defaults to the maximum sample rate of 1 MHz. To activate this trigger, check the Trigger On box. The Analyzer safely captures transients up to ±8 kV. Rapid Voltage Changes. Quick transitions of voltage between two steady state voltages are known as rapid voltage changes (RVCs). The capture trigger for RCVs is based on a percentage of the nominal voltage. The event is captured when the arithmetic mean of 100/120 (50/50Hz) half cycle RMS value is below the set trigger limit. Inrush Current. Inrush occurs when large loads or low impedance loads are connected to the power systems. Examples are motors, transformers, and capacitive loads. During the connection, the current draw can increase to 10x or more of the normal level. The threshold for capture is set as an absolute level of the measurement of a half cycle RMS value. The trigger must be turned on to be operable. The Analyzer adds a default hysteresis. Note See the Glossary for more information about these configuration effects and details of the triggering mechanisms. 30 MyFlukeStore Shop for Fluke products online at: www. .com 1.888.610.7664

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1773/1775/1777
Users Manual
30
Transients.
If the model in use includes the transient feature, the trigger settings consist of
High, Medium, and Low. These settings are on values that are equivalent of 200 %, 100 % and
50 % of the nominal voltage superimposed on the voltage waveform at any point during the
cycle. In addition, there is a user selectable custom setting expressed as an absolute voltage.
With the 1777 Analyzer, select the sample rate of the transient capture as either 1 MHz or
20 MHz. The 1775 Analyzer defaults to the maximum sample rate of 1 MHz.
To activate this trigger, check the
Trigger On
box.
The Analyzer safely captures transients up to ±8 kV.
Rapid Voltage Changes.
Quick transitions of voltage between two steady state voltages are
known as rapid voltage changes (RVCs). The capture trigger for RCVs is based on a
percentage of the nominal voltage. The event is captured when the arithmetic mean of
100/120 (50/50Hz) half cycle RMS value is below the set trigger limit.
Inrush Current.
Inrush occurs when large loads or low impedance loads are connected to the
power systems. Examples are motors, transformers, and capacitive loads. During the
connection, the current draw can increase to 10x or more of the normal level. The threshold for
capture is set as an absolute level of the measurement of a half cycle RMS value.
The trigger must be turned on to be operable. The Analyzer adds a default hysteresis.
Note
See the
Glossary
for more information about these configuration effects and details of
the triggering mechanisms.
Shop for Fluke products online at:
1.888.610.7664
www.
MyFlukeStore
.com