Power Quality Logger

Using the Logger

Logging with Voltage Converters

The 1744/1743 Logger includes an adjustable converter ratio that enables it to be used with voltage converters (potential transformers, or PTs).

Note

When logging with voltage converters, make sure the power supply cables are not connected in parallel to the voltage test leads, or the Logger’s power consumption can reduce accuracy.

The converter ratio is defined using the PQ Log software.

Connecting the Logger

W X Warnings

•To avoid electrical shock, do not connect any part of the Logger to systems that have higher voltages to ground (earth) than are marked on the Logger.

•Areas between the power company meter and the source of the distribution system are characterized as CAT IV areas. To avoid electrical shock or equipment damage, never connect the Logger to power in CAT IV areas if the voltage-to-earth ground is greater than 300 V.

•To avoid damaging the Logger, never connect its voltage measuring inputs to phase-to-phase voltages higher than 830 V.

•To avoid damaging the Logger, never connect the power supply leads to voltages higher than 660 V RMS ac.

•The Logger is to be used and handled only by qualified personnel (see page 6).

•Maintenance work on the Logger must be done only by qualified service personnel.

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