1744/1743
Users Manual
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
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)
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