AC RMS Panel Meter is UL-listed.
October 2, 2006 -
Laureate Model RMS 4½ digit meter provides 0.15% full scale accuracy for ac voltage or current signals from 10 Hz to 10 kHz. It offers 5 ac RMS voltage ranges from 200 mV to 300 V full scale and 4 ac RMS current ranges from 2 mA to 5 A full scale. High common mode rejection allows stable readings with current shunts located on high side of line, while 5 A input capability with 10 mW current shunt allows output of 5 A current transformers to be applied directly to meter.
(Archive News Story - Products mentioned in this Archive News Story may or may not be available from the manufacturer.)
Original Press release
Laurel Electronics, Inc.
3183-G Airway Ave.
Costa Mesa, CA, 92626
USA
AC RMS Panel Meter Reads Accurately with Heavily Distorted Waveforms
Costa Mesa, CA - Laurel Electronics, Inc. announces the Laureate Model RMS, a UL-listed, 4-½ digit, true AC RMS panel meter which provides 0.15% full scale accuracy for AC voltage or current signals from 10 Hz to 10 kHz. It reads accurately in AC applications where there is considerable distortion of current waveforms from nonlinear loading. The input is AC coupled to read only the AC component, such as ripple on a power supply.
Model RMS provides five AC RMS voltage ranges from 200.00 mV to 300.0V full scale, and four AC RMS current ranges from 2.0000 mA to 5.000A full scale. Precision circuitry is used to compute the root-mean-square of complex waveforms. Spikes up to 2.4 times the maximum of each range are accurately measured, providing a crest factor (Vp / Vrms) of 240 for a signal amplitude of 1% of full scale, decreasing to 2.4 at 100% of full scale. The span tempco is less than 0.002%/°C.
High common mode rejection allows stable readings with current shunts located on the high side of the line. Five Amp input capability with a 10 mohm current shunt allows the output of 5A current transformers to be applied directly to the meter. The current reading can easily be scaled to display the input to the current transformer.
Options include dual relays for control or alarm, isolated 4-20 mA and 0-10V analog outputs, and an RS232 or a dual-connector RS485 port for data communications with a host computer or PLC. Modbus RS485 is fully supported.
Laureate meters can be powered from 95-240 Vac ±10%, or optionally from 10-34 Vac or 10-48 Vdc. The five LED digits are available in red or green. The 1/8 DIN case meets NEMA 4X (IP65) specifications from the front when panel mounted. Any setup functions and front panel keys may be locked out for simplified usage and security.
The base price is $245. For specifications and the pricing of options, visit www.laurels.com/acmeter.htm.
Founded in 1990, Laurel Electronics, Inc. is a leading U.S. manufacturer of programmable industrial digital panel meters, counters, timers, and DIN rail transmitters.
For more information, contact
Jim Way, VP Sales & Marketing,
phone: 866-709-7713 or
714-434-1631,
email sales@laurels.com.
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