RD-21 Portable Single-Phase Reference Standard
- Typical Accuracy: ±0.01% @ PF=1
- Worst Case Accuracy: ±0.02% @ PF≥0.5
The RD-21 portable single phase reference standard is one of the most versatile reference instruments ever. The RD-21 has a typical accuracy of ±0.01% @ PF=1 for all measurement functions across its entire operating range, with a maximum worst case accuracy of ±0.02%. This worst case accuracy specification includes the variables of stability, power factor, traceability uncertainty and test system errors.
A unique design makes the RD-21 unsurpassed in its ability to accurately measure “real world” waveforms. An exclusive feature is its analog to digital signal converter. The RD-21 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-21 makes it an ideal reference standard for field testing applications. The RD-21 may be used with a controlled current source to accurately test revenue meters. In field applications the RD-21 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-21. It can 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 lower accuracy is acceptable.
|Current range||1 × 1mA … 120 (200 / 225)A (1) auto-ranging|
|Voltage range||1 × 30 … 600V auto-ranging|
|Auxiliary power range||1 × 60 … 600V auto-ranging|
|Frequency of the fundamental||40 … 70Hz (2)|
|Power Factor range||Any|
|Operating temperature range||-20°C … +70°C|
|Humidity||0 … 95%, non-condensing|
|Measurement modes||2 wire active and reactive|
|Measuring functions||Four quadrant, single-phase, simultaneous measurement of :|
□ energy (active, reactive, apparent)
□ power (active, reactive, apparent)
□ power factor
□ phase angle
|Accuracy||Typical Accuracy: ±0.01% @ PF=1|
Worst Case Accuracy: ±0.02% @ PF≥0.5
|Temperature influence outside normal operating temperature range||±0.0005%/°C (±5 ppm/°C)|
|Accuracy of angle||±0.006°|
|Display Gate input||BNC with 150 ohms pull up to 5 volts, clamped at 5.7 volts|
|Gate Rate||200ns pulse width minimum, maximum 20 Hz repetition rate|
|Output type||Open collector, clamped at 27 volts|
|BNC pulse output default value||0.00001Wh/pulse but may be reprogrammed|
|Output Frequency||Max 2.1 MHz (200ns pulse width minimum)|
|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.