RD-23 Portable Single-Phase Reference Standard

RD-23 Portable Single-Phase Reference Standard

  • Typical Accuracy: within traceability uncertainties
  • Worst Case Accuracy: ±0.01% @ PF≥0.5

The portable RD-23 single phase reference standard is one of the most versatile reference instruments ever. The RD-23 has a worst case accuracy of ±0.01 % for all measurement functions across its entire operating range, with a typical accuracy that is within traceability uncertainties. This worst case accuracy specification includes the variables of stability, power factor, traceability uncertainty and test system errors.

A unique design makes the RD-23 unsurpassed in its ability to accurately measure “real world” waveforms. The RD-23 reference meter, includes an exclusive analog to digital signal converter. The RD-23 built-in converter is combined with Radian Research’s renowned electronically compensated voltage and current input transformers and a hermetically sealed reference. This combination-provides the highest degree of accuracy, stability and versatility offered in a portable three-phase standard.


The compact light weight design of the RD-23 makes it an ideal reference standard for field testing applications. The RD-23 may be used with a controlled current source to accurately test revenue meters. In field applications the RD-23 can perform a single-phase meter accuracy test using existing service loads. Pickups to sense meter disk rotation or calibration pulses of infrared, visible light, or KYZ signals plug directly into the RD-23. It can be utilized to test reference standards of lesser accuracy and is also an ideal standard to be intergraded within a meter test bench where lower accuracy is acceptable.

Current range1 × 1mA … 120 (200 / 225)A (1) auto-ranging
Voltage range1 × 30 … 600V auto-ranging
Auxiliary power range1 × 60 … 600V auto-ranging
Frequency of the fundamental40 … 70Hz (2)
Power Factor rangeAny
Operating temperature range-20°C … +70°C
Humidity0 … 95%, non-condensing
Measurement modes2 wire active and reactive
Measuring functionsFour quadrant, single-phase, simultaneous measurement of :
□ energy (active, reactive, apparent)
□ power (active, reactive, apparent)
□ voltage
□ current
□ power factor
□ phase angle
□ harmonics
AccuracyTypical Accuracy: within traceability uncertainties
Worst Case Accuracy: ±0.01% @ PF≥0.5
Temperature influence outside normal operating temperature range±0.00025%/°C (±2.5 ppm/°C)
Accuracy of angle±0.003°
Display Gate inputBNC with 150 ohms pull up to 5 volts, clamped at 5.7 volts
Gate Rate200ns pulse width minimum, maximum 20Hz repetition rate
Output typeOpen collector, clamped at 27 volts
BNC pulse output default value0.00001Wh/pulse but may be reprogrammed
Output frequencyMax 2.1MHz (200ns pulse width minimum)
DisplayOn demand
Other possible features (upon request)Built-in comparator
Harmonic analysis (up to the 50th)

(1) Operating range. Specified range from 10mA to maximum current.

(2) Operating range. Specified range from 45 to 65Hz.

Product card
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