Laureate Counter Time Controllers | Phase Angle & Duty Cycle Meter

Laurel Electronics provides digital panel meters / controllers, totalizers, counters, loop-powered meters, temperature meters, for all types of transducers or process indication & control.

Laureate™ Phase Angle & Duty Cycle Meter
For offset in degrees & On or Off period in percent

Features
Common Features
Inputs from NPN or PNP proximity switches, contact closures, digital logic, magnetic pickups down to 12 mV, or AC inputs up to 250 Vac.	Trigger on positive or negative pulse edges.
Frequency from .005 Hz to 10 kHz.	6-digit red or green LED display.
Isolated 5, 10 or 24 Vdc excitation output to power sensors.	NEMA 4X (IP-65) front panel, 1/8 DIN case.
Uses Standard counter main board and FR signal conditioner.	Optional dual relays, 4-20 mA & 0-10 V analog output, RS-232/485, and parallel BCD output.
Certified to UL 3101-1, CAN/CSA-C22.2, EN 61010-1 (CE Mark).
Phase Angle Mode
Measures phase angle between two waveshapes of similar period	Resolution of 1º, 0.1º or 0.01º.
.01% accuracy at AC line frequency	-----------
Duty Cycle Mode
Measures ON or OFF period as a percentage of total period.	Resolution of 1%, 0.1% or 0.01%.
Click to Order Phase Angle & Duty Cycle Meter

Description
The Laureate™ phase angle and duty cycle meters both use the FR dual-channel signal conditioner board and the Extended counter main board.

Phase Angle Mode
Phase angle measurement requires that two signals with identical periods be applied to Channels A and B. A display from -180º to +180º is obtained by timing the rising edge of one channel and the falling edge of the other channel, and programming a 180º offset. A resolution of 1º, 0.1º or 0.01º is selectable. Accuracy is 0.01% up to 100 Hz, 0.1% at 1 kHz, and 1% at 10 kHz Phase angle measurement is commonly used with AC power from 50 Hz to 400 Hz. Phase angle needs to be set to zero to synchronize AC generators. It also applies to the triggering of SCRs and Triacs for power control. The phase angle between AC current and voltage determines power factor. The Laureate phase angle meter provides exceptionally fast response and six-digit accuracy for low frequencies, such as AC line frequency. Phase angle is determined by timing crystal clock pulses over a specified gate time which is selectable from 10 ms to 199.99 s. By selecting the minimum gate time of 10 ms, the update rate can be up to 20/s for 50/60 Hz AC line frequency. Improved accuracy is obtained by making the gate time long enough so that multiple cycles can be averaged.
Duty Cycle Mode	Universal Signal Conditioner
Duty cycle is a measure of ON or OFF period as a percentage of total period. As for phase angle, duty cycle is determined by averaging an integral number of periods over a gate time which is selectable from 10 ms to 199.99 s. The same signal is applied to Channels A and B. The meter divides the average pulse width by the period between pulses and expresses this ratio in percent. A resolution of 1%, 0.1% or 0.01% is selectable. By selecting leading or falling pulse edges, the ON or OFF duty cycle can be displayed. Duty cycle measurement is used to monitor modulated proportional control systems and pulse-modulated systems, such as radar, lasers or packet radio. For long periods, duty cycle can be measured by using the A and B channels of the Laureate dual-channel counter to totalize AC line cycles and having the counter display the ratio of the two totals scaled to percent.	The dual-channel signal conditioner accepts inputs from proximity switches with PNP or NPN output, TTL or CMOS logic, magnetic pickups, contact closures, and AC signals from 12 mV to 250 Vac. Nine hysteresis and signal levels are jumper selectable for reliable triggering. A 1600 Hz low-pass rolloff filter for noise reduction and contact debounce times of 3 ms or 50 ms are also selectable A built-in isolated 5, 10, or 24 Vdc excitation supply can power proximity switches and other sensors, and eliminate the need for an external power supply.
Other Features & Options
Plug-in isolated analog output, dual setpoint controller and RS232/485 communi- cations or BCD output boards can upgrade a Laureate from a stand-alone monitor to system interface and control. Laureate meters and counters meet NEMA 4X (IP-65) standards from the front for high pressure washdown when panel mounted.
Click to Order Phase Angle & Duty Cycle Meter

Specifications

Phase Angle Mode		Duty Cycle Mode
Item Displayed	Phase angle difference between two waves of same period	Item Displayed	ON or OFF duty cycle of periodic pulse waveshape
Display Units	1°, 0.1°, 0.01°	Display Units	1%, 0.1%, 0.01%
Frequency Range	.005 Hz to 10 kHz	Frequency Range	.005 Hz to 50 kHz
Accuracy	01°, .005 Hz to 100 Hz, .1° at 1 kHz, 1° at 10 kHz	Accuracy	.01%, .005 Hz to 500 Hz, .1% at 5 kHz, 1% at 50 kHz
Maximum Timing Interval	200 s	Maximum Timing Interval	200 s
Display		Excitation Output
Readout	6 digits, 7-segment, 14.2 mm (.56")	5 Vdc	5 Vdc ±5%, 100 mA max
Color	Red or green LED	10 Vdc	10 Vdc ±5%, 120 mA max
Range	-99999 to +99999	24 Vdc	24 Vdc ±5%, 50 mA max
Indicators	4 red LED lamps	Output isolation	50 Vdc to meter ground
Electrical Connections

Environmental		Power
Operating Temperature	0°C to 55°C	Voltage, std.	85-264 Vac and 90-370 Vdc
Storage Temperature	-40°C to 85°C	Frequency	DC or 49-440 Hz
Relative Humidity	95% at 40°C, non-condensing	Voltage, opt.	8-28 Vac and 9-37 Vdc
Protection	NEMA-4X (IP-65) when panel mounted	Power isolation	Safety-rated to 250 Vac, meter ground to earth ground, DC to 60 Hz, 4.2 kVp per High Voltage Test
Inputs
Types	AC, pulses from NPN, PNP transistors, contact closures, magnetic pickups	Selectable Hysteresis	(-12 mV to +12 mV), (+30 mV to +60 mV), (-30 mV to -20 mV), (-150 mV to +150 mV), (+350 mV to +600 mV), (-600 mV to -350 mV), (-1.15 V to +1.15 V), (+1.25 V to +2.1 V),
Signal ground	Common ground for channels A & B	Selectable Hysteresis
Debounce Time	Selectable, none or 1600 Hz Selectable 0, 3, 50 ms	Rolloff Filter	(-2.1 V to -1.25 V)
Timing Interval
Periodic Timing Interval		Gate time + 30 ms + 0-2 signal periods
Gate Time		Selectable 10 ms to 199.99 s
Timeout		Selectable 10 ms to 199.99 s
Output & Display Update		Same as period timing interval
Click to Order Phase Angle & Duty Cycle Meter

Applications
Phase Angle Mode		Duty Cycle Mode
	Phase angle indicates the lead or lag in degrees from 0º to 360º between two periodic signals having the same frequency. In the illustration, phase angle is 360*P1/P. The signals are applied to the A and B input channels		Duty cycle indicates the ON or OFF time in percent from 0% to 100% of period for repetitive pulse train. In the illustration, duty cycle is 100 x t / P. The same signal is applied to the A and B channels.
Duty Cycle and Elapsed Time of a Laser
		Duty cycle can be used to indicate the ON time of a pulsed laser in relation to total time. Laureate counters can also measure elapsed time, the number of pulses, average width in µs, the number of pulses, and total energy applied.
Using Laureate Meters and Counters to Synchronize Motor Generators

Synchronization of two motor generators requires that the two frequencies be identical, that the lines be in phase, and that the line voltages be close to each other. In this illustration, a single Laureate dual channel counter measures both frequencies to six-figure accuracy in a few line cycles. Another Laureate dual channel counter measures phase angle to 0.1º resolution. Two Laureate AC RMS Voltmeters, which offer ranges of 200.00 V and 660.0 V, are used to display the two RMS voltage to 0.1% accuracy.
Click to Order Phase Angle & Duty Cycle Meter

FLW, Inc - 3505 Cadillac Ave - Bldg E - Costa Mesa, CA. - 92626 - USA - Ph (714) 751 - 7512 - Fax (714) 751 - 0213