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The Ronan X85 calibrator is a versatile voltage, current and resistance reference source and measuring device. With calibrated output and input sides is can be applied to a wide range of calibration tasks including the determination of dc transfer characteristics or active components and modules. The user and service manual can be downloaded here and a set of schematics at a higher resolution, from here.
The instrument was tested throughout its voltage ranges by comparison with a Solartron 7150plus Multimeter interfaced to a computer via a National Instruments GPIB-232CT-A converter. 10 settings in each of the voltage ranges, 100mV, 1V, 10V were measured and the results shown in the table below.
|100mv range||1 volt range||10 volt range|
|Set volts||7150 reading||set volts||7150 reading||set volts||7150 reading|
Within the limitations of the 4 1/2 digits of the Ronan Calibrator compared with the 6 1/2 digits of the Solartron 7150plus, the table shows an excellent correspondence between the two instruments.