RD-21 Dytronic Single-Phase Reference Standard
Features
Measurement
The RD-21 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
The compact design of the RD-21 makes it an ideal reference standard for testing applications where optimal accuracy is required.
Analog Sense
The RD-21’s Optional analog sense feature enables testing transducers and energy meters that provide an analog output from zero to 2 mA.
Intuitive User Interface
The RD-21’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-21.
Overview
Product Highlights
The Radian RD-21 Single-phase Electricity Reference Standard is one of the most versatile reference instruments ever. The RD-21 has a guaranteed accuracy of 0.02%. This guaranteed accuracy specification includes the variables of stability, power factor, traceability uncertainty and test system errors.
The RD-21 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-21 absolutely unsurpassed in its ability to accurately measure “real world” waveforms. The RD-21’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-21 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 design of the RD-21 makes it an ideal reference standard for field testing applications where optimal accuracy is required. The RD-21 can be used with a controlled current source to test revenue meters and reference standards. In field applications the RD-21 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 standard. The RD-21 is ideal for testing high end energy meters found in power plants, substations, inter-tie points and at large utility customer accounts. The RD-21 may serve as a secondary standard to test portable field standards or standards within meter test benches. The RD-21 is also ideal to be integrated as the reference standard within a meter test bench.
Intuitive User Interface
The RD-21’s LCD and five-button keypad provides a direct interface to the end user while the RD-21’s RS-232 port, utilized with the applicable software, allows for remote PC control and configuration of the RD-21. Utilizing the five-button keypad and observing the LCD, the user is able to scroll through the various measurement functions of the RD-21 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-21.
Technical Data
Package Contents
- RD-21 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: ±0.02%
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 Case Accuracy is ± 0.02%/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-21 MENU FOR MEASUREMENTS AND FUNCTIONALITY
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-21-Xxx | |
| MODEL | MEASUREMENT FUNCTIONS |
| RD-21-1xx | Whrs, Volts, Amps, VARhrs |
| RD-21-2xx | Whrs, Volts, Amps, VARhrs, VAhrs, Qhrs, Watts, VARs,VA, Phase Angle, Power Factor, Frequency |
| RD-21-3xx | 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-21-4xx | 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-21-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 |
| -x4x | Analog Sense Testing (2mA DC max) |
| -x5x | Built-in comparator and analog sense |
| -x6x | Harmonic analysis and analog sense |
| -x7x | Built-in comparator, harmonic analysis and analog sense |
| Specifying the third of the last three digits: RD-21-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-BR1Burden & Ratio Analysis Module |
|
 |
RM-111Automated Comparator |
|
 |
RR-PCSuiteSoftware for Waveform Analysis |
|
 |
RR-KitSoftware for Custom Application Development |
|
 |
RR-1HOptical Pickup |
|
 |
RR-KYZPulse Input Adapter with 4-Pin plug |
|
 |
RR-DSDisk Sensor |
|
 |
Soft Carrying CaseFor RD Standard and accessories |
|
 |
Cables and Leads
|
|
 |
Current Probes
|