Arrangements for measuring currents or voltages or for indicating presence or sign thereof (G01R5/00 takes precedence; for measuring bioelectric currents or voltages A61B5/24)

Child Classifications

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• G01R 19/0007 +1 CPC CPC only CPC only
• G01R 19/0023 CPC only CPC only
• G01R 19/003 CPC only CPC only
• G01R 19/0038 CPC only CPC only
• G01R 19/0046 +4 CPC CPC only CPC only
• G01R 19/0084 CPC only CPC only
• G01R 19/0092 CPC only CPC only
• G01R 19/02 Measuring effective values, i.e. root-mean-square values IPC+CPC Available in IPC and CPC
• G01R 19/04 Measuring peak values of AC or of pulses IPC+CPC Available in IPC and CPC
• G01R 19/06 Measuring real component; Measuring reactive component IPC+CPC Available in IPC and CPC
• G01R 19/08 Measuring current density IPC+CPC Available in IPC and CPC
• G01R 19/10 Measuring sum, difference or ratio IPC+CPC Available in IPC and CPC
• G01R 19/12 Measuring rate of change IPC+CPC Available in IPC and CPC
• G01R 19/14 Indicating direction of current; Indicating polarity of voltage IPC+CPC Available in IPC and CPC
• G01R 19/145 Indicating the presence of current or voltage since 1980 IPC+CPC Available in IPC and CPC
• G01R 19/165 Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values since 1980 +4 CPC IPC+CPC Available in IPC and CPC
• G01R 19/175 Indicating the instants of passage of current or voltage through a given value, e.g. passage through zero since 1980 IPC+CPC Available in IPC and CPC
• G01R 19/18 using conversion of DC into AC, e.g. with choppers IPC+CPC Available in IPC and CPC
• G01R 19/22 using conversion of AC into DC +2 CPC IPC+CPC Available in IPC and CPC
• G01R 19/25 using digital measurement techniques since 1980 +4 CPC IPC+CPC Available in IPC and CPC
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