Calibration / Test Lab

B-1027

Ross Engineering’s high voltage calibration and test lab provides high accuracy capability for conducting tough reliability tests on all our high voltage devices. In this facility we test and calibrate High voltage Relays, HV Dividers, HV Probes, Spark Gaps, our Fiber Optic Systems, and High Voltage Digital Voltmeters up to 450KV. We provide our own in house test lab to ensure Ross products meet or exceed required safety standards as well as our own high standards of dependability, long life, and quality. Our technicians use the most advanced test equipment calibrated to (NIST) National Institute of Standards and Technology to provide the highest in testing accuracy.

With steadily increasing worldwide high voltage calibration needs, Ross Engineering Corporation now maintains two separate, N.I.S.T. traceable high voltage calibration laboratories. Calibration capabilities are up to 450KV PK 60Hz, 400KV DC and 400KV 1.2x50uS lightning impulse and other waveforms. Our engineers can perform a wide variety of testing on high voltage devices, instruments and materials. The lab also has a large capacitor bank from 50KV to 400KV in 50KV, 0.5uF 625J steps, series or parallel.

Ross Voltage Divider Standards

The standards used to calibrate and test were designed and built by Ross Engineering in 1982 and given transfer status by the National Bureau of Standards (NBS), now called the National Institute of Standards and Technology (NIST). Since then the devices have not shown any appreciable drift or non-linearity after thousands of hours of operation. The standards are routinely sent to the NIST and compared to the national standard to insure accurate and repeatable calibrations and high voltage testing from the Ross calibration lab.

High Frequency RF & Pulse Testing

Ross Engineering voltage dividers are designed for use up to 30MHz, 10 nanosecond rise time pulses. Since no national standard exists for wideband high voltage, it was necessary for Ross Engineering to develop its own RF standard and test facility. This allows us to make accurate and repeatable measurements at high frequency, high voltage. Devices calibrated in this facility have been compared to other laboratories standards and have proven to be an accurate and useful measurement tool.

Other test capabilities include:

• DC to 10MHz CW and pulse frequency response calibration
• HV resistor and capacitor testing and evaluation
• High current low voltage temperature rise testing up to 4,000 Amp 60Hz continuous
• Thermal hipot and leakage current testing from -75 to +370 C (24 cu ft)
• HV Vacuum interrupter, contactor and circuit breaker testing
• Insulation testing and evaluation