ENGLISH
PRIMARY TRANSFER STANDARD
RD-22
PRIMARY TRANSFER STANDARD
Typical Accuracy: within traceability uncertainties
Worst Case Accuracy: ±0.01% @ PF≥0.5
DC to AC Transfer Accuracy: ±0.005%
INTRODUCTION
OPERATIONAL HIGHLIGH TS
The RD-22 primary transfer standard utilizes Radian
Research’s Dytronic measurement technology that features
a Radian Research designed Integrating Analog to Digital
Signal Converter based upon a charge balance conversion
principle. The RD-22 also employs a Radian Research
electronically compensated concentric core current
comparator transformer.
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
National Metrology Laboratory.
The RD-22 represents 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 for specific
models.
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 degree of error from the 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.
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 added
Radian Research technology features to provide the highest
degree of accuracy, stability and versatility ever offered in a
primary transfer standard.
TECHNICAL DATA Current range
1 × 20mA … 125 (200)A auto-ranging
Voltage range
1 × 60 … 600V auto-ranging
Auxiliary power range
1 × 60 … 600V auto-ranging
Frequency of the fundamental
40 … 70Hz (1)
Power Factor range
Any
Auxiliary power converter input
120V or 240V
Auxiliary Power DC input
24V nominal
Operating temperature range
+18°C … +30°C
Humidity
0 … 95%, non-condensing
Measurement modes
2 wire active and reactive
Typical Accuracy: within traceability uncertainties
Worst Case Accuracy: ±0.01% @ PF≥0.5
Accuracy
DC to AC Transfer Accuracy: ±0.005%
Display Gate input
BNC with 150 ohms pull up to 5 volts, clamped at 5.7 volts
Gate Rate
200ns pulse width minimum, maximum 20Hz repetition rate
Output type
Open collector, clamped at 27 volts
BNC pulse output default value
0.00001 Wh/pulse but may be reprogrammed
Frequency
Max 2.1MHz (200ns pulse width minimum)
Display
Yes
Other possible features (upon request)
Built-in comparator
Harmonic analysis
(1) Operating range. Specified range from 45 to 65Hz.
For additional technical details, please contact our sales department (sales@metertest.eu)
34643/2016-06-16
MeterTest Sp. z o.o. | Lukasinskiego St. 26 b. 21, 58-100, Swidnica, Poland
meter-test-equipment.com
+48 74 856 63 92
sales@metertest.eu