Fluke 1744 用户手册

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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. 

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. 

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)