Product Highlights
Built on RADIAN’s heritage of metrology excellence, the RX‑10, RX-11, and RX-15 combine Xytronic measurement technology, a familiar user interface, and a rugged cube form for seamless integration into existing test equipment and infrastructure.
Whether you’re verifying meters on‑site, calibrating test benches in the lab, or serving as a master standard, the RX‑10, RX-11, and RX-15 ensure timely, trusted results with over 40 simultaneous metrics and a wide autoranging input range (30‑600 V, 20 mA‑225 A).
Features
- Xytronic architecture with high‑speed A/D, hermetic references and advanced algorithms for class‑leading performance.
- Accuracy classes: ±0.04% (RX‑10), ±0.02% (RX‑11), ±0.01% (RX‑15) including stability, uncertainty and system errors.
- Measurement suite: voltage, current, phase angle, active/reactive/apparent power & energy, wideband/fundamental, harmonics/THD, vector VA — over 40 metrics concurrently.
- Autoranging inputs: 30‑600 V and 20 mA‑225 A for maximum flexibility.
- Familiar five‑button interface with built‑in comparator and legacy compatibility; Ethernet/SCPI control for automation.
- Compact, rugged cube chassis suitable for field, shop, or lab use.
- Backed by ISO/IEC 17025 accreditation for industry-leading measurement uncertainties and unmatched customer trust for over 40 years.
Model Comparison
RADIAN RX-10
The RADIAN RX-10 provides ±0.04% energy accuracy (±0.02% at unity power factor), making it a dependable single-phase reference standard for calibration, meter testing, and precision measurement in the field and the meter shop. It delivers consistent performance across voltage, current, power, and energy measurements, with broad operating ranges suited for utility, laboratory, and production environments.
Voltage accuracy is ±0.02% and direct AC current accuracy is ±0.028% at TCAL. Power accuracy matches the energy class at ±0.04%. Long-term drift is controlled by a stability specification of 0.0016% × √month, and the energy temperature coefficient is 0.0005%/°C, supporting stable results as conditions change.
Performance Highlights
• Power and energy accuracy: ±0.04% (±0.02% at unity PF)
• Voltage accuracy: ±0.02%
• Current accuracy: ±0.028%
• Stability: 0.0016% × √month
• Energy temperature coefficient: 0.0005%/°C
• Single-phase reference standard
RADIAN RX-11
The RADIAN RX-11 delivers ±0.02% energy accuracy (±0.01% at unity power factor), a reduced uncertainty class compared with the RX-10. It supports customers who need tighter traceability and greater control of uncertainty in single-phase test environments.
Voltage accuracy is ±0.01% and direct AC current accuracy is ±0.014% at TCAL. Long-term precision is supported by a stability specification of 0.0008% × √month, and the energy temperature coefficient is 0.0005%/°C, maintaining reliable performance as ambient conditions vary.
Performance Highlights
• Energy accuracy: ±0.02% (±0.01% at unity PF)
• Voltage accuracy: ±0.01%
• Current accuracy: ±0.014%
• Stability: 0.0008% × √month
• Energy temperature coefficient: 0.0005%/°C
• Single-phase reference standard
RADIAN RX-15
The RADIAN RX-15 provides ±0.01% energy accuracy (±0.005% at unity power factor), the highest accuracy class in the RX-10 series of single-phase reference standards. This accuracy level supports advanced metrology, high-precision calibration, checking other reference standards, and demanding production testing.
Voltage accuracy is ±0.005% and direct AC current accuracy is ±0.007% at TCAL. Long-term drift is minimized by a stability specification of 0.0004% × √month, and the energy temperature coefficient is 0.0005%/°C, ensuring consistency across environmental variations.
Performance Highlights
• Energy accuracy: ±0.01% (±0.005% at unity PF)
• Voltage accuracy: ±0.005%
• Current accuracy: ±0.007%
• Stability: 0.0004% × √month
• Energy temperature coefficient: 0.0005%/°C
• Single-phase reference standard
Delivering Exceptional Accuracy, Precision and Stability
- Three 75 A inputs that can be wired in series or parallel, covering 20 mA to 225 A and 30 to 600 V.
- Meter pickup inputs for testing meters directly against the standard.
- Built-in comparator that calculates meter error without extra hardware.
- Ethernet (SCPI) and RS-232 connections for automated test systems and PC software.
- Optional current probes for measuring current without breaking the circuit.
Which RX Single-Phase Standard Is Right for You?
All three models share the same rugged cube form, Xytronic measurement technology, inputs, and interfaces. The difference is the accuracy class. Choose the model that matches the uncertainty your testing requires.
Need a three-phase reference standard? See the RADIAN RX-30, RX-31, and RX-33. Need the highest accuracy in the lab? See the RADIAN RD-22.
Looking for a complete Test Board? For series-parallel meter testing, see the WECO 2051X. For true three-phase and more advanced meter testing, see the WECO 4050X.
| Model | Accuracy at 0.5 PF | At unity PF | Best for |
|---|---|---|---|
| RX-10 | ±0.04% | ±0.02% | Everyday field and shop meter testing |
| RX-11 | ±0.02% | ±0.01% | Testing that needs tighter uncertainty |
| RX-15 | ±0.01% | ±0.005% | Lab use and checking other reference standards |
Technical Specifications
Accuracy
| RX-10 | RX-11 | RX-15 | |
|---|---|---|---|
| Power and energy, 0.5 lag to 1 to 0.5 lead | ±0.04% | ±0.02% | ±0.01% |
| Power and energy at unity power factor | ±0.02% | ±0.01% | ±0.005% |
| Voltage, 30 V to 600 V (525 V at 50 Hz) | ±0.02% | ±0.01% | ±0.005% |
| Current, 20 mA to 225 A | ±0.028% | ±0.014% | ±0.007% |
| Phase angle | 0.008° | 0.005° | 0.003° |
| Frequency, 45 Hz to 75 Hz | ±0.0001% | ±0.0001% | ±0.0001% |
| Repeatability | 0.0001% ÷ √(test time in seconds) | 0.0001% ÷ √(test time in seconds) | 0.0001% ÷ √(test time in seconds) |
Accuracy is stated in percent of reading at 23 °C ±5 °C, as expanded uncertainty at 95% confidence (k = 2), and includes stability, crosstalk, and traceability uncertainty. Repeatability is already included in the accuracy figures. Power and energy accuracy applies to tests of 1 second or longer. Below 0.5 power factor, power and energy accuracy is ±(0.01% ÷ PF) maximum.
Stability and Temperature
| RX-10 | RX-11 | RX-15 | |
|---|---|---|---|
| Stability, power and energy (× √month) | 0.0016% | 0.0008% | 0.0004% |
| Stability, voltage (× √month) | 0.0008% | 0.0004% | 0.0002% |
| Stability, current (× √month) | 0.0012% | 0.0006% | 0.0003% |
| Temperature drift, power and energy | 0.0005%/°C | 0.0005%/°C | 0.0005%/°C |
| Temperature drift, voltage | 0.00015%/°C | 0.00015%/°C | 0.00015%/°C |
| Temperature drift, current | 0.0003%/°C | 0.0003%/°C | 0.0003%/°C |
| Specified temperature range | −20 to +70 °C | −20 to +70 °C | 0 to +40 °C |
| Operating temperature range | −20 to +70 °C | −20 to +70 °C | −20 to +70 °C |
| Storage temperature range | −40 to +80 °C | −40 to +80 °C | −40 to +80 °C |
| Humidity | 0% to 95%, non-condensing | 0% to 95%, non-condensing | 0% to 95%, non-condensing |
Harmonics and Measurement
| RX-10, RX-11, and RX-15 | |
|---|---|
| Measurement bandwidth | 3,840 Hz (to the 64th harmonic at 60 Hz) |
| Harmonics | Harmonic accuracy matches the RX-30, RX-31, and RX-33 respectively |
| Measurement modes | Wideband (all harmonics) or fundamental only |
| Metrics | Over 40 simultaneous metrics, including watts, Wh, VA, VAh, VAR, VARh, volts, amps, phase angle, power factor, frequency, harmonics, and THD |
| Voltage input | 30 V to 600 V at 60 Hz (30 V to 525 V at 50 Hz), 1 MΩ input impedance, 500 mA fused |
| Current input | Three 75 A inputs, 20 mA to 75 A each, wired in series or parallel for up to 225 A |
| External CT input | Up to 1 A, 7-pin connector |
Automation and Interfaces
| RX-10, RX-11, and RX-15 | |
|---|---|
| Integration time | 0.5 seconds by default, adjustable in 0.5-second steps in PCSuite. Integration time is how long each reading is measured; it is separate from the test time. |
| Ethernet | SCPI commands (see the SCPI application note) |
| RS-232 | RADIAN legacy RD commands (adapter supplied) |
| Pulse ports | 2 bidirectional, programmable BNC ports; outputs up to 2.1 MHz, selectable Wh, VARh, or VAh |
| Optical sensor port | 4-pin connector for optional optical pickups |
| Display and keypad | 3.25-inch backlit LCD with the five-button RADIAN keypad and built-in comparator |
| Warm-up | 30 seconds |
| PC software | PCSuite 5 |
Physical, Safety, and Calibration
| RX-10, RX-11, and RX-15 | |
|---|---|
| Auxiliary power | 60 V to 600 VAC, autoranging; about 25 VA maximum |
| Size | 139 mm × 139 mm × 190 mm high (5.5 × 5.5 × 7.5 in) |
| Weight | 2.3 kg (5 lb) |
| Ingress protection | IP30 (DIN EN 60529) |
| Safety | IEC 61010-1 |
| Traceability | Directly traceable to NIST and NRC, with optional ISO/IEC 17025 accredited calibration |
| Calibration interval | 1 year |
| ISO/IEC 17025 calibration uncertainty | Voltage ±0.003%; current ±0.005%; power and energy ±0.005%, or ±0.003% at unity power factor; frequency ±0.000005% |
| Calibration documents | Sample calibration reports: RX-10: ISO/IEC 17025 | ANSI/NCSL Z540-1 RX-11: ISO/IEC 17025 | ANSI/NCSL Z540-1 RX-15: ISO/IEC 17025 | ANSI/NCSL Z540-1 ISO/IEC 17025 scope of accreditation |
RX Single-Phase Standards FAQ
What current and voltage range does the RX-10 series cover
Each model covers 20 mA to 225 A through three 75 A inputs that can be wired in series or parallel, and 30 to 600 V. To measure current without breaking the circuit, add an optional current probe such as the RC-SR704 or the RC-FLEX3000A.
What does the RX-10 series measure
The RX-10, RX-11, and RX-15 measure more than 40 values at the same time, including energy, active, reactive, and apparent power, voltage, current, phase angle, power factor, and frequency. All three use the same measurements and interfaces; only the accuracy class differs.
How do I connect the RX-10 series to a meter for accuracy testing
Connect a meter pickup, such as the RR-IR/s or the RM-1H, to the standard's pickup input. The built-in comparator then calculates meter error directly. For a complete Test Board, see the WECO 2051X for series-parallel meter testing, or the WECO 4050X for true three-phase and more advanced meter testing.
Can the RX-15 be used to check other reference standards
Yes. At ±0.01%, the RX-15 is four times more accurate than the RX-10, which meets the common 4:1 accuracy ratio for checking a working standard. Learn more in How Accurate Does Meter Test Equipment Need to Be?
How is the RX-10 series kept accurate
RADIAN Calibration Services recalibrates your standard with traceable, accredited calibration (see our certifications and accreditation). RADIAN Care Plans combine scheduled recalibration with extended warranty coverage.
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