Products Accessories Services Applications Company Support Media

RD-20 Dytronic Portable Single-Phase Standard

Features Overview Technical Data Accessories Media

Features

Measurement

The RD-20 registers both forward and reverse energy flow and provides voltage, current, power and energy (Active, Reactive, Apparent) information. The Harmonic Analysis option makes the analysis of customer load through the 50th harmonic order while the built-in comparator option provides for automatic calculation of test results for meters and standards being tested.

Meter and Standard Testing

In the field, the RD-20 can perform single-phase meter accuracy test using existing service load. The RD-20 may be utilized to test reference standards of lesser accuracy.

Intuitive User Interface

The RD-20’s LCD and five button keypad provides a direct interface to the end user while the RS-232 port, utilized with the applicable software, allows for remote PC control and configuration of the RD-20.

Overview

Product Highlights

The Radian RD-20 Single-phase Electricity Reference Standard is one of the most versatile reference instruments ever. The RD-20 has a guaranteed accuracy of 0.04%. This guaranteed accuracy specification includes the variables of stability, power factor, traceability uncertainty and test system errors.

The RD-20 utilizes Radian’s new Dytronic measurement technology consisting of a Radian designed Integrating Analog to Digital Signal Converter. Unlike off-the-shelf A/D Converters used in other instruments, Radian’s A/D Converter is specifically designed and optimized for power and energy measurement. This unique design makes the RD-20 absolutely unsurpassed in its ability to accurately measure “real world” waveforms. The RD-20’s A/D Converter is combined with Radian’s renowned electronically compensated voltage and current input transformers and a hermetically sealed reference set to provide the highest degree of accuracy, stability and versatility offered in a portable single-phase standard.

Measurements

The RD-20 is a four quadrant single-phase, simultaneous measuring instrument that registers both forward and reverse energy flow and provides voltage, current, power and energy (Active, Reactive, Apparent) information. The Harmonic Analysis option makes available the analysis of customer load though the 50th harmonic order while the Built-in Comparator option provides for the automatic calculation of test results for the meters and standards being tested.

Meter and Standard Testing

The compact light weight design of the RD-20 makes it an ideal reference standard for field testing applications. The RD-20 may be used with a controlled current source to accurately test revenue meters. In field applications the RD-20 can perform a single-phase meter accuracy test using existing service load. Pickups to sense meter disk rotation or calibration pulses of infrared, visible light, or KYZ signal plug directly into the RD-20. The RD-20 may be utilized to test reference standards of lesser accuracy and is also an ideal standard to be intergraded within a meter test bench where lesser accuracy is acceptable.

Intuitive User Interface

The RD-20’s LCD and five-button keypad provides a direct interface to the end user while the RD-20’s RS-232 port, utilized with the RR-Kit software, allows for remote PC control and configuration of the RD-20. Utilizing the five-button keypad and observing the LCD, the user is able to scroll through the various measurement functions of the RD-20 and toggle between the different menu screens. The amount of measurement information and the number of menu screens viewable is determined by the model number of the RD-20.

Technical Data

Package Contents

RD-20 Standard
RD-2x and RD-3x Manual CD
RD-2x and RD-3x Getting Started Guide
Cables

OPERATING RANGE

Current (Autoranging)
.02 to 67 amps per input (three input option)
.02 to 75 amps per input (three input extended range option)
.02 to 120 amps per input (one input option)
Input voltage: 30 to 600 volts (Autoranging)
Auxiliary power input: 60 to 600 volts (Autoranging)
Frequency: 45 to 65 Hz
Phase Angle: 0 to 360° or -180 to 180°
Power Factor: -1 to 1
Temperature: –20° to +70°C (-4° to +158°F)
Humidity: 0% to 95% non-condensing
Shock and vibration: Any that is not destructive

PHYSICAL DESCRIPTION

Weight: 2.5 kg (5.5 lbs); 3.6 kg (8lbs) shipping weight
Size 190.5 mm (7.5") H x 139.7 mm (5.5") D excluding strap
Backlit LCD, 4 line by 16 character
Current inputs: 6mm jacks
Potential and Aux power inputs: 4mm Banana type jacks
BNC connector (port 1) used for input/gating
BNC connector (port 2) used for pulse outputs
BNC connector (port 3) used for three phase SYNC or analog sense
5 membrane button keypad: UP/DOWN/ESC-RESET/ENTER/MODE
8 pin RJ-45 jack for RS-232 communication
Pickup input for direct interface to RR-DS, RR-1H, or RR-KYZ
Clamp-on CT input for optional clamp-on current transformer

TEST AND CALIBRATION

No physical adjustments, all calibration performed with software
50 or 60 Hz calibration can be provided
Orientation: Any within 90° of vertical
Re-calibration interval: 365 days
Warm up time: 30 seconds

ACCURACY

Guaranteed accuracy specification includes stability, traceability uncertainty, power factor, and test system errors.

Guaranteed Accuracy: ±0.04%

Temperature influence outside normal operating temperature range per °C: ±0.0005%
For Power Factors of 100% and 50% output for Whrs, VARhrs, VAhrs there is no impact on accuracy. For Power Factor of <0.5 (PF between - 60° and -90° ) then Guaranteed Accuracy is ± 0.04%/PF.

PROTECTION

Isolation: Complete: Input/output/power/case/control
Dielectric withstand: 2.3 kVrms, 60Hz, 60 seconds
Surge withstand: IEEE 472 and ANSI 37.90
Fuses: #34.3117 for potential and auxiliary power

INPUTS (Port 1)

Display Gate: BNC with 150 ohms pull up to 5 volts, clamped at 5.7 volts
Gate Rate: 200 nS pulse width minimum, maximum 20 Hz repetition rate

OUTPUTS (Port 2)

Type: BNC, Open collector, clamped at 27 volts (50mA max)
Frequency: Max 2.1 MHz (200 nS pulse width minimum)
Metrics: Selectable, i.e. Watt hours, VAR hours, VA Hours, etc.
Pulse value: Programmable (0.00001 Wh/pulse Default)

QUALITY

Meets all applicable ANSI and IEC specifications
Radian Research’s calibration procedures are in compliance with MIL-STD-45662A and ANSI/NCSL Z540-1-1994
Radian Research’s primary transfer standards are traceable to NIST
Radian Research’s quality system is ISO-9001-2000 certified
Warranty: Two years parts and labor

RD-20 MENU FOR MEASUREMENTS AND FUCTIONALITY

The last three digits determine the model. The first of the last three digits determines the measurement functions; the second of the last three digits determines if the unit has a comparator, harmonics analysis, and/or analog sense capability; the third of the last three digits determines the current input configuration.

Specifying the first of the last three digits: RD-20-Xxx
MODEL	MEASUREMENT FUNCTIONS
RD-20-1xx	Whrs, Volts, Amps, VARhrs

RD-20-2xx	Whrs, Volts, Amps, VARhrs, VAhrs, Qhrs, Watts, VARs, VA, Phase Angle, Power Factor, Frequency

RD-20-3xx	Whrs, VARhrs, VAhrs, Qhrs, Volts, Amps, Watts, VARs, VA, Vhr, Ahr, V2hr, A2hr, Phase Angle, Power Factor, Frequency Min & Max measurements: All indicating functions

RD-20-4xx	Whrs, Volts, Amps, VARhrs, Qhrs, Vahrs, Watts, VARs, VA, Vhr, Ahr, V2hr, A2hr, Phase Angle, PF, Frequency Min & Max: All indicating functions AVG response: VAhrs, VA, Volts, Vhrs, Amps, Ahrs

Specifying the second of the last three digits: RD-20-xXx
-x0x	No comparator, No harmonic analysis
-x1x	Built-in comparator
-x2x	Harmonic analysis (RR-Analyze Software included)
-x3x	Built-in comparator AND harmonic analysis

Specifying the third of the last three digits: RD-20-xxX
-xx1	Clamp-on CT input and one 120 Amp current input (120A total)
-xx2	Clamp-on CT input and three 67 Amp current inputs (200A total)
-xx3	Clamp-on CT input and three 75 amp current inputs (225 Amps total)
-xx4	Rack Mount Enclosure and one 120 Amp current input (120A total)

Accessories

		RD-BR1 Burden & Ratio Analysis Module
		RM-111 Automated Comparator
		RR-PCSuite Software for Waveform Analysis
		RR-Kit Software for Custom Application Development
		RR-1H Optical Pickup
		RR-KYZ Pulse Input Adapter with 4-Pin plug
		RR-DS Disk Sensor
		Soft Carrying Case For RD Standard and accessories
		Cables and Leads
		Current Probes