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1744/1743
Users Manual
2
Logger Power Supply
The Logger does not include a power switch, but turns on automatically
whenever its power supply leads are connected to a voltage in its allowed
range. You can plug the Logger’s power supply leads into a standard wall
outlet (using the included adapter cord), or you can connect them directly to
the power network under test (in parallel with the test leads) if there is no
convenient wall outlet.
Power Interruptions
The Logger can sustain operation through power interruptions of up to
three seconds, long enough for most common interruptions. In longer
interruptions, the Logger shuts down, then resumes logging when power
returns.
Introduction to the Logging Functions
The Logger monitors power quality and locates disturbances in low and
medium voltage distribution networks. It measures up to three voltages and
four currents. Logged values are saved in your choice of sequential averaging
periods. You graphically or numerically evaluated measured values with PQ
Log.
The Model 1744 has two types of logging functions: logging function A
(Advanced) and logging function P (Power). Function A is the full set of
parameters, and function P provides logging capability optimized for load
studies and basic power logging. Function P contains every parameter in
Function A except voltage and current harmonics and interharmonics. Model
1743 provides only logging function P.
Measured values are saved as averaged values over user-selected averaging
periods. You can evaluate measured values graphically or in tabular form with
PQ Log software.
Logging function parameters:
• RMS Voltage of each phase (average, min, max)
• RMS Current of each phase and neutral (average, min, max)
• Voltage events (dips, swells, interruptions)
• Power (kW, kVA, kVAR, Power PF, Power tangent)