Fluke 1773 Product Manual - Page 38

PQ Logger Event Trigger Settings, Session Settings, Phase Power Quality Analyzer, Pressure, Trigger

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3 Phase Power Quality Analyzer Measurement Configuration This example considers an output of a temperature transmitter with 4 mA to 20 mA current that represents 0 °C to 250 °C: 1. Feed the current through a 50 Ω resistor to convert the signal to a voltage of 0.2 V dc to 1 V dc. 2. Use the on-screen keyboard to input the name, Pressure, the units, and the mathematical constants that change the 4 mA to 20 mA to pressure readings. At 4 mA the voltage will be 0.2 V dc representing °C. At 20 mA the voltage will be 1 V dc representing 250 °C. The span of the signal from 0 to 250 °C will be 0.8 V. To create a value of 250 °C at full scale the signal is multiplied by 312.5 (250/0.8). As the 0 °C is 0.2 V dc, an offset is applied, this offset is the difference between 250 and 312.5 which is 62.5. 3. Check the AUX box to enable the display and logging of the AUX input. Before logging can start, review the Event Trigger Setting. This setting ensures a check is made before the logging session starts and results in a session that delivers valid data every time. Note To use this feature you will need to purchase the optional Models: Fluke 17XX AUX Input Adapter Box that allows inputs of ±1000 V dc with 4 mm sockets or ±10 V dc with push-in terminals. PQ Logger Event Trigger Settings The Event Trigger Settings are supplementary to the PQ Meter Trigger Settings and are used for mains signaling only. The trigger is based on a small percentage of the Nominal Voltage but only appear for triggering at the frequencies selected in the mains signaling setup. The typical setting is 5 % of nominal. The trigger must be enabled with the Trigger On radio button. (Most applications will not need this trigger turned on.) Other event trigger settings should also be reviewed. See Event Trigger Settings. Session Settings The Session Settings specify the duration of the logging session from an absolute date of some unknown date in the future, the average period of each of the logged measurements, and the details required for harmonics measurements. In addition, you can create a unique name for the session and a description of the session that is included in all reports generated from the data. Name. Type in a name for the logging session with the on-screen keyboard. 33 MyFlukeStore Shop for Fluke products online at: www. .com 1.888.610.7664

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3 Phase Power Quality Analyzer
Measurement Configuration
33
This example considers an output of a temperature transmitter with 4 mA to 20 mA current
that represents 0 °C to 250 °C:
1.
Feed the current through a 50
Ω
resistor to convert the signal to a voltage of 0.2 V dc to
1 V dc.
2.
Use the on-screen keyboard to input the name,
Pressure
, the units, and the mathematical
constants that change the 4 mA to 20 mA to pressure readings.
At 4 mA the voltage will be 0.2 V dc representing °C. At 20 mA the voltage will be 1 V dc
representing 250 °C. The span of the signal from 0 to 250 °C will be 0.8 V. To create a value
of 250 °C at full scale the signal is multiplied by 312.5 (250/0.8). As the 0 °C is 0.2 V dc, an
offset is applied, this offset is the difference between 250 and 312.5 which is 62.5.
3.
Check the
AUX
box to enable the display and logging of the AUX input.
Before logging can start, review the Event Trigger Setting. This setting ensures a check is
made before the logging session starts and results in a session that delivers valid data every
time.
Note
To use this feature you will need to purchase the optional Models: Fluke 17XX AUX
Input Adapter Box that allows inputs of
±
1000 V dc with 4 mm sockets or
±
10 V dc with
push-in terminals.
PQ Logger Event Trigger Settings
The Event Trigger Settings are supplementary to the PQ Meter Trigger Settings and are used
for mains signaling only.
The trigger is based on a small percentage of the Nominal Voltage but only appear for
triggering at the frequencies selected in the mains signaling setup. The typical setting is 5 % of
nominal. The trigger must be enabled with the
Trigger On
radio button. (Most applications will
not need this trigger turned on.)
Other event trigger settings should also be reviewed. See
Event Trigger Settings
.
Session Settings
The Session Settings specify the duration of the logging session from an absolute date of
some unknown date in the future, the average period of each of the logged measurements,
and the details required for harmonics measurements. In addition, you can create a unique
name for the session and a description of the session that is included in all reports generated
from the data.
Name.
Type in a name for the logging session with the on-screen keyboard.
Shop for Fluke products online at:
1.888.610.7664
www.
MyFlukeStore
.com