User's Manual

PQ Log

PC Software for 1740 Series

Introduction

The Fluke 1740 Series Loggers monitor power quality and locate disturbances in low and

medium voltage distribution networks. The “Logger” in this manual refers to either of the

Models 1744 or 1745.

The Logger measures up to 3 voltages and 4 currents. Logged values are saved in your

choice of sequential averaging periods. You graphically or numerically evaluate

measured values with PQ Log Software.

PQ Log is the PC application software for 1740 Series Loggers. PQ Log is compatible

with MS Windows



NT, 2000 and XP. PQ Log prepares the Logger for use, and receives

downloaded data from the Logger. You transfer logged data to a PC for graphical and

tabular evaluation, export to a spreadsheet, or generation of reports for printing.

Logging Functions

Models 1744 and 1745 have 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 operates only with logging function P.

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 Factor, Cosine φ)

• Energy, total energy

• Flicker (Pst – short term, and Plt – long term)

• Voltage thd (Total Harmonic Distortion)

• Current thd

• Current CF (Crest Factor)

• Voltage harmonics to the 50

(not in P function)

• Voltage interharmonics (not in P function)