This standard applies to X-Y recorders and their accessories having electronic devices in their measuring and/or auxiliary circuit(s). It also applies to non-interchangeable accessories and accessories of limited interchangeability (e.g. shunts, impedance elements, etc.) when they are used with the recorder and adjustments have been made for the combination. This standard does not apply to X-t recorders. For X-Y recorders incorporating a time base, this standard applies to the X-Y function only. This standard does not apply to special purpose recorders which are covered by their own IEC standards.