N4L Calibration Philosophy
N4L products combine market leading accuracy with exceptional stability so that users can be confident in the long term integrity of measurements. While we recommend re-calibration every 12 months, stability over time and a conservative approach to our product specification allows our products to remain within specification for much longer periods of time. This is proven by many N4L customers who, working in accordance with their own ISO9001 procedures, are able to select 24 month calibration periods for N4L products they own.
Alongside our UKAS17025 certification which provides voltage, current, phase and power calibration up to 850Hz plus calorimetric power to 2MHz, we have developed a proprietary high frequency multi channel signal generator named the ACC-IV (Automatic Calibration Controller 4). Combined with custom designed amplifiers, the ACC-IV provides high frequency voltage and current sources at a higher signal level than commercially available calibrators and provides N4L with the means to calibrate our power analyzers over a wider frequency range than any other company.
The exceptional detail and accuracy of our calibration is achieved by unique calibration hardware, combined with processes that come from an absolute commitment to best metrology practice. This includes standard certification with over 200 calibration points at different levels and frequencies to the adjustment points we use for measurement optimization, therefore ensuring linearity of the instrument under test and also the integrity of calibration. An investment in 10 fully automated test systems allows N4L to provide this highest level of calibration with each and every power analyzer we supply.
Every power analyzer is supplied from new with two calibration certificates
1. ISO17025 UKAS accredited certification for Voltage, Current, Phase, Power (including low power for EN50564 and Energy Star) and PF up to 850 Hz.
|ACCIV Standard Calibration (Utilizing UKAS traceable instrumentation)|
|Signal Amplitude||Frequency Range|
+/-250uVpk to +/-400Vpk DC to 100kHz
Linearly reducing to +/-10Vpk 100kHz to 2MHz
|DC to 2MHz|
+/-1mApk to +/-5Apk DC to 100kHz
+/-300mApk to 100kHz to 2MHz
|DC to 2MHz|
2. Customer specific calibration points can be offered as an additional option by request.
Our comprehensive calibration procedure is unrivalled in our sector* and we are confident that our power analyzers offer the highest wide bandwidth performance in the market.
*according to N4L research 2014
Technical Note 003 – Closed Loop Calorimetry PDF, 2,418kb
Schedule of Accreditation link: http://www.ukas.org/calibration/schedules/Actual/7949Calibration%20Single.pdf
N4L Calibration Traceability Ladder link: N4L 17025 Calibration Traceability PDF, 492kb