Laurel Electronics Laureate AC Power Factor Meter & AC Phase Angle Meter - Manual

LAUREL ELECTRONICS INC., 3183-G Airway Ave., Costa Mesa, CA 92626, USA • Tel 714-434-6131 • www.laurels.com 1
LAUREL
ELECTRONICS, INC.
Laureate™ AC Power Factor Meter
& AC Phase Angle Meter
Features
• Programmable to read phase angle or power factor with two waveshapes of
identical period
• Reads phase angle with resolution of 1°, 0.1° or 0.01° and accuracy of 0.05°
at AC line frequency
• Reads power factor from 1.000 to 0.000 with sinusoidal signals
• Accepts AC signals from 1 Hz to 10 kHz, AC line voltages up to 250 Vrms
• Universal AC power Input, 85-264 Vac
• NEMA 4X, 1/8 DIN case
• Optional serial I/O: Ethernet, USB, RS232, RS485, Ethernet-to-RS485 converter
• Optional relay outputs: dual or quad relays, contact or solid state
• Optional isolated analog output: 4-20 mA, 0-20 mA, 0-10V, -10 to +10V
• Optional low voltage power: 10-48 Vdc or 12-32 Vac
Description
AC Phase Angle Measurement
The Laureate™ Phase Angle & Power Factor Meter computes
phase angle θ by timing zero crossings of two signals applied to
Channels A and B. The phase angle range is selectable as 0° to
360° or -180° to +180°. Resolution is selectable as 1°, 0.1° or
0.01°. Typical accuracy is 0.01% from 1 Hz to 100 Hz, 0.1% at 1
kHz, and 1% at 10 kHz.
Phase angle in degrees indicates the phase lead or lag bet-
ween two periodic signals of the same period, as determined
from their zero crossings. These two signals will typically be the
voltage and current applied to a load. As illustrated, the phase
angle θ in degrees is +360*P1/P.
AC Power Factor Measurement
The Laureate™ Phase Angle & Power Factor Meter computes
power factor as cos(θ) from phase angle θ. Power factor read-
ings can range from 1.000 to 0.000 with three decimal places
and an accuracy of 0.1% for sinusoidal signals at 50/60 Hz power
line frequency. While power factor is always positive, the meter
artificially assigns a minus sign to power factor for negative
phase angles, and it sets power factor to 0 for phase angles
greater than 90°.
The power factor of an AC power system is the ratio of real
power in watts (W) divided by apparent power in volt-amperes
(VA). For sinusoidal signals differing by a phase angle power
factor will be cos(θ).
Designed for flexibility
The Laureate Phase Angle & Power Factor Meter utilizes the
Laureate Extended counter main board and the FR dual-channel
signal conditioner board, which accepts AC signals from 12 mV
p-p to 250 Vrms. Optional plug-in boards for communications and
control include Ethernet and other serial communication boards,
dual or quad relay boards, and single or dual isolated analog
output boards.
Laureates may be powered from 85-264 Vac or optionally from
12-32 Vac or 10-48 Vdc. The display is available with red or
green LEDs. The 1/8 DIN case meets NEMA 4X (IP65) specifi-
cations from the front when panel mounted. Any setup functions
and front panel keys can be locked out for simplified usage and
security. All power and signal connections are via UL / VDE /
CSA rated screw clamp plugs.