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  RD-33 Dytronic Three-Phase Reference Standard
 
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RD-22 Primary Transfer Standard



Features

Measurement Technology

The RD-22 utilizes Radian’s Dytronic measurement technology featuring a Radian designed Integrating Analog to Digital Signal Converter based upon a charge balance conversion principle. The RD-22 also employs a Radian electronically compensated concentric core current comparator transformer.



Transfer Accurate and Traceable Measurement

The RD-22 can be used to transfer accurate and traceable measurements from Radian Research’s calibration laboratory. Alternatively, it can be calibrated directly by a national laboratory, such as National Institute of Standards and Technology.



Complete AC Electric Metrology

When used with RS-933 Laboratory Reference System the RD-22 serves as an active reference to provide complete AC electric metrology.



Overview



The RD-22 Primary Transfer Standard represents the state-of-the-art technology in a commercially available true DC to AC accuracy transfer reference. The RD-22 has typical AC measurement accuracies within the limits of traceability. Repeatability of 1 ppm can be attained at 120 V and 5 A inputs of specific models.



The RD-22 utilizes Radian’s Dytronic measurement technology featuring a Radian designed Integrating Analog to Digital Signal Converter based upon a charge-balance conversion principle. The RD-22 also employs a new Radian electronically compensated concentric core current comparator transformer.This current comparator is autoranging and external to the standard, allowing for non-galvanic current connection to the unit. These two new technologies combine with existing Radian features to provide the highest degree of accuracy, stability and versatility ever offered in a primary transfer standard.



The RD-22 can be used to transfer accurate and traceable measurements from Radian Research’s calibration laboratory. Alternatively, it can be calibrated directly by a National Metrology Laboratory, such as the National Institute of Standards and Technology (NIST).



The RD-22 can also be tested by using external DC primary reference sets of voltage, current, and time. These external DC references can be compared directly to the RD-22’s internal reference sets. Additionally, the RD-22 can be used as the active reference to the Radian RS-933 Laboratory Reference System to provide a complete AC electric metrology lab.



The RD-22 provides four quadrant, single-phase simultaneous energy and power measurements. The potential input and current input are totally autoranging. This autoranging feature was pioneered by Radian Research and makes it impossible to damage the unit by applying a signal to the wrong tap. The potential input range is 60 to 600 V, the current input range is 0.2 to 125 A or 0.2 to 200 A. The external auxiliary power input converter provides 24 V DC to the auxiliary power input of the RD-22. The external auxiliary power converter minimizes 60/50 Hz line frequency interference from coupling to the measurement circuitry.



The RD-22 can optionally analyze harmonic waveforms through the 150th harmonic order. A second option enables the RD-22 to automatically calculate and display the error of standards being tested. The analog sense option allows for testing of transducers and other devices that provide an analog current output instead of a digital pulse output. The RD-22 also provides a serial communications port for direct connection to the RS-232 serial port of a personal computer.



Technical Data



Package Contents

 
RD-22 Primary Transfer Standard
RD-2x and RD-3x Manual CD
RD-2x and RD-3x Getting Started Guide
Shipping/Transit Case
 


OPERATING RANGE

  • Current Comparator (Autoranging)
  • 0.2 to 125 amps per input (125 amp option)
  • 0.2 to 200 amps per input (200 amp option)
  • Input voltage: 60 to 600 volts (Autoranging)
  • Auxiliary power converter input: 120 V or 240 V
  • Auxiliary Power DC input: 24 volts nominal
  • Frequency: 45 to 65 Hz
  • Phase Angle: 0 to 360° or -180 to 180°
  • Power Factor: -1 to 1 with no impact on accuracy
  • Temperature: 18° to 30°C
  • Humidity: 0% to 95% non-condensing
  • Shock and vibration: Any that is not destructive


PHYSICAL DESCRIPTION

  • Weight
    • RD-22 + Current Comparator + Platform: 12 lbs (5.45kg)
    • Auxiliary Power Input Converter: 3 lbs (1.36kg)
  • Size
    • RD-22: 190.5 mm (7.5") H x139.7mm (5.5") W x 139.7mm (5.5") D
    • Platform: 19mm (0.75") H x 152.4mm (6"0 W x 508mm (20")D
  • Backlit LCD, 4 line by 16 character
  • Potential and Aux power inputs: 4mm Banana type jacks
  • BNC (port 1) input/gating, time reference input
  • BNC (port 2) pulse outputs
  • BNC (port 3) 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
  • CCT input to external current comparator


TEST AND CALIBRATION

  • 50 or 60 Hz calibration can be provided
  • Re-calibration interval: 365 days
  • Warm up time: 60 minutes


ACCURACY

Accuracy specifications apply to all supported measurement functions using sinusoidal waveforms and across the entire operating range of the product between the temperatures of 18 to 30 C. Maximum guaranteed accuracy specification includes stability, traceability uncertainty, power factor, and test system errors.
Typical Accuracy: within traceability uncertainties
Guaranteed Accuracy: ±0.01%
DC to AC Transfer Accuracy: ±0.005%


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 certified
  • Warranty: Two years parts and labor




    17025 Accredited Certificate option available


RD-22 Models

 
MODEL MEASUREMENT FUNCTIONS
RD-22-332 Dytronic Portable Standard, 0.005% Accuracy, Built-in
comparator, Harmonic Analysis, One 200 Amp Current
Comparator Transformer, Whrs, VARhrs, VAhrs, Qhrs, Volts,
Amps, Watts, VARs, VA, Vhr, Ahr, V2hr, A2hr, Phase Angle, PF,
Frequency. Min & Max Measurements: All Indicating
Functions


Options:
RR-TAD Transconductance Amplifier and Precision Divider. For use with Primary DC V & R. Used to convert Primary 10VDC cell into 3VDC for input to the RD-22. Used to divide (2) 10K ohm Primary resisters for current input to the RD-22.




Accessories





RD-BR1
CT Burden & Ratio Analysis Module

RM-111
Automated Comparator

RR-PCSuite
Testing and Analysis PC Software

RR-1H
Optical Pickup

RR-KYZ
Pulse Input Adapter with 4-Pin plug

RR-DS
Disk Sensor

Cables and Leads

 

Current Probes

 

IRDS
Sensor

RR-Kit
Software for Custom Application Development

Soft Transit Case
For RD Standards and Accessories
2x Hard Case Hard Transit Case
For RD Standards and Accessories

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