Multi-Tech Systems 7500, 7600 manual Historic Data Logging, Loss Log, Harmonics Logging

ION 7500 / ION 7600 User’s GuideData Logging Setup

Historic Data Logging

Three data recorders are used to record “standard” power system quantities, such as phase current, phase voltage and power factor. These recorders are labeled Hist Mean Log, Hist High Log, and Hist Low Log. By default, they log the following ION output register values:

Hist Mean Log		Hist High Log		Hist Low Log
Vll ab mean	I avg mean	Vll ab high	I avg high	Vll ab low	I avg low
Vll bc mean	I 4 mean	Vll bc high	I 4 high	Vll bc low	I 4 low
Vll ca mean	kW tot mean	Vll ca high	kW tot high	Vll ca low	kW tot low
Vll avg mean	kVAR tot mean	Vll avg high	kVAR tot high	Vll avg low	kVAR tot low
V unbal mean	kVA tot mean	V unbal high	kVA tot high	V unbal low	kVA tot low
Ia mean	PF lag mean	Ia high	PF lag high	Ia low	PF lag low
Ib mean	PF lead mean	Ib high	PF lead high	Ib low	PF lead low
Ic mean	Freq mean	Ic high	Freq high	Ic low	Freq low

Loss Log

The Loss Log recorder is configured to record loss values. By default, it logs the following ION parameters:

Parameter	Description
MU Ia^2h int	Phase A interval current squared hours
MU Ib^2h int	Phase B interval current squared hours
MU Ic^2h int	Phase C interval current squared hours
MU Vll ab^2h int	Phase A interval voltage Line-to-Line squared hours
MU Vll bc^2h int	Phase B interval voltage Line-to-Line squared hours
MU Vll ca^2h int	Phase C interval voltage Line-to-Line squared hours

Harmonics Logging

Two recorders provide various harmonics logs, including K-factor and Total

Harmonics Distortion (THD). These recorders are labeled Harm Mean Log and

Harm High Log. By default, they log the following ION output register values:

Harm Mean Log

V1 THD mean	I1 K Fac mean
V2 THD mean	I2 K Fac mean
V3 THD mean	I3 K Fac mean
I1 THD mean
I2 THD mean
I3 THD mean

Harm High Log

V1 THD high	I1 K Fac high
V2 THD high	I2 K Fac high
V3 THD high	I3 K Fac high
I1 THD high
I2 THD high
I3 THD high

Chapter 3 - Default Meter Functionality Page 55