Ross Engineering Corporation’s High
Voltage Calibration Lab provides high accuracy capability for conducting
tough reliability tests on all our high voltage devices. In this
facility we test and calibrate HV Relays, HV Dividers, HV Probes, Spark
Gaps, our Fiber Optic Systems, and HV 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 test equipment
calibrated by or traceable to National Institute of Standards and
Technology or other national metrology institute to provide the highest
in testing accuracy.
Ross Engineering provides A2LA accredited
high voltage calibration to ISO/IEC 17025:2005. This certificate includes
accreditation to ANSI/NCSL Z540-1-1994 and any additional program
requirements in the field of calibration. For the calibrations to which
A2LA accreditation applies, please refer to the laboratory's
Calibration Scope of
Accreditation.
With steadily increasing worldwide high voltage
calibration needs, Ross Engineering Corp. now maintains two separate
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 tests on high voltage devices, instruments and materials. One
lab also has a large capacitor bank from 50KV to 400KV in 50KV, 0.5uF
625 joule modules, series or parallel.
Ross Voltage Divider
Standards
The Voltage Divider standards used to calibrate and test were designed and
built by Ross Engineering starting 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 national
standards labs to ensure accurate and repeatable calibrations and high
voltage testing from the Ross calibration lab.
High Frequency RF & Pulse Testing
Some 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. Devices calibrated in this facility have been compared to
other laboratories standards and have proven to be accurate and useful
measurement tools.
Other test capabilities
include:
- ±0.01% DC, ±0.04% 60Hz, ±3% to 1MHz, ±3dB to over
10MHz.
- 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 4,000A 60Hz continuous.
- Thermal testing from -50°C to +370°C (24cu ft).
- HV Vacuum Interrupter, Contactor and Circuit
Breaker dielectric withstand testing.
- HV Insulation testing and evaluation.
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