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1736/1738
Users Manual
22
Function Selection Buttons
The Logger has three buttons that switch between the Meter, Power,
and Logger function modes. The current mode shows in the upper left
corner of the display.
Meter
– The Meter mode shows measurement readings for:
•
Voltage (VRMS)
•
Current (A RMS)
•
Frequency (Hz)
•
Wave Shape of Voltage and Current
•
THD (%) and Harmonics of Voltage (%, V RMS)
•
THD (%) and Harmonics of Current (%, A RMS)
•
AUX Input
Push to show the additional values.
Live Trend
You can determine the values or display a trend chart of the last
7 minutes. In the chart:
1.
Use or the cursor keys to show the list of available
parameters.
2.
Push (Reset) to clear the graph and restart.
It is also possible to log the values with the logger function.
Scope
The scope screen shows about 1.5 periods of voltage and current.
The exact number of shown periods depends on the input frequency.
The scope screen is helpful to:
•
identify the maximum peak value on current channels
•
as a guide for the selection of the current sensor and range
•
identify the phase sequence of voltage and current
•
visually inspect the phase shift between voltage and current
•
understand the consequence of high harmonics on the signal
Use or the cursor keys to show the list of available
parameters.
Harmonics
Use (Harmonics) to access the harmonics analysis screens for
voltage and current.
Harmonics Spectrum
The harmonics spectrum is a bar chart of the harmonics h02 ... h50.
When % of the fundamental is selected, THD is included in the chart.
The bar chart in absolute units (V RMS, A RMS) includes the
fundamental. Use the trend chart to show the exact value.
Trend Chart
The trend chart is a chart of the fundamental, a selectable harmonic,
or THD. A split screen shows the harmonics spectrum in the upper
graph and the trend chart in the lower graph. Touch the bar chart or
use
and to select the parameter of interest. Push
(Trend only) to expand the trend chart to full screen.
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