Laurel-electronics Laureate True RMS AC Voltage & Current Meter w Manuel d'utilisateur télécharger pdf

LAUREL

ELECTRONICS INC., 3183-G Airway Ave., Costa Mesa, CA 92626, USA • Tel 714-434-6131 • www.laurels.com 1

LAUREL

ELECTRONICS, INC.

Laureate™

True RMS AC Voltage & Current

Meter with 1 Cycle Update at 50/60 Hz

Features

• True AC or AC plus DC RMS measurement with crest factor of 3.0 at FS

• Fast response, 0-16.7 ms to rated accuracy after each input signal cycle

• Measurement range from 0.1% to 100% of full scale

• Accurate to 99.9% of full scale, 10 Hz to 10 kHz

• 0.2, 2, 20, 200 & 600V voltage ranges

• 2, 20, 200 mA & 5A current ranges

• All ranges factory calibrated

• Scalable to 5 digits for external current shunts or 5A current transformers

• Selectable peak or valley display

• 85-264 Vac universal AC power supply

• 1/8 DIN case sealed to NEMA-4X from front panel

• Optional serial I/O: Ethernet, USB, RS232, RS485, Ethernet-to-RS485 converter

• Optional relay output: 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

• Priced competitively with less capable AC meters

Description

The Laureate™ True RMS meter is a 60,000 count digital panel

meter with exceptional performance at half the price of a bench

top meter. It can measure true RMS voltage or current of AC

signals where there is considerable distortion of the waveform,

such as rectifier outputs or waveforms chopped by an SCR,

TRIAC or transistor circuit, as illustrated.

• True RMS readings in 0-16 ms after completion of one input

signal cycle allow anomalies to be detected and alarmed

before they become expensive problems. Fast on/off control

and alarm can be achieved with optional dual or quad relays,

either contact or solid state. The meter can also capture peak

and valley readings that occur at 50/60 Hz.

• Accuracy is 0.1% of full scale for signals from DC to 10 kHz

and signal amplitudes down to 0.1% of full scale. The crest

factor (Vp / Vrms) is 3.0 at full-scale Vrms of 20,000 counts

and a Vp of 60,000 counts. The meter starts to flash

overrange at 132% of full scale Vrms , at which point the

available crest factor is 60,000 / 26,400 = 2.27. Meaningful

readings with rated resolution continue to be obtained up to

212% of full scale Vrms (42,433 counts) for sinusoidal signals,

at which point the available crest factor is 1.414. For safety

reasons, the maximum RMS input signal should never exceed

600V or 5A. ETL certification is for a maximum voltage of 300

Vrms.

AC or DC coupling is jumper selectable on the signal condition-

er board. AC coupling accommodates signals from 10 Hz to 10

kHz and is suitable for applications such as measuring AC ripple

on a DC power supply. DC coupling accommodates signals from

0 to 10 kHz. Multiple integral cycles are averaged for signals

above 50/60 Hz. A single cycle is captured for signals from 3 Hz

to 50/60 Hz. Below 3 Hz and at DC, the

capture rate is 3/sec.

Use with current Transformers. High

common mode rejection allows stable

readings with current shunts located on

the high side of the line. Five amp input

capability allows the output of 5A current

transformers to be applied directly to the

meter, with no need for a stepdown

transformer. The meter reading can easily be scaled for the

current transformer ratio. Digital filtering is selectable for noisy

signals.

Designed for system use. Optional plug-in boards include

Ethernet and other serial communication boards, dual or quad

relay boards, and an isolated analog output board. 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) specifications from the

front when panel mounted. Any setup functions and front panel

keys can be locked out for simplified usage and security. A built-

in isolated 5, 10, or 24 Vdc excitation supply can power trans-

ducers and eliminate the need for an external power supply. All

power and signal connections are via UL / VDE / CSA rated

screw clamp plugs.

1 2 3 4 5

Résumé du contenu

Page 1 - Features

LAUREL ELECTRONICS INC., 3183-G Airway Ave., Costa Mesa, CA 92626, USA • Tel 714-434-6131 • www.laurels.com 1 LAUREL ELECTRONICS, I

Page 2 - Specifications

LAUREL ELECTRONICS INC., 3183-G Airway Ave., Costa Mesa, CA 92626, USA • Tel 714-434-6131 • www.laurels.com 2 Specifications AC Volt

Page 3 - Mechanical

LAUREL ELECTRONICS INC., 3183-G Airway Ave., Costa Mesa, CA 92626, USA • Tel 714-434-6131 • www.laurels.com 3 Relay Outputs (opti

Page 4

LAUREL ELECTRONICS INC., 3183-G Airway Ave., Costa Mesa, CA 92626, USA • Tel 714-434-6131 • www.laurels.com 4 Applications Using Lau

Page 5 - Ordering Guide

LAUREL ELECTRONICS INC., 3183-G Airway Ave., Costa Mesa, CA 92626, USA • Tel 714-434-6131 • www.laurels.com 5 Ordering Guide Create

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Laurel-electronics Laureate True RMS AC Voltage & Current Meter w Manuel d'utilisateur

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