For example, the heterodyne frequency. Andreessen Horowitz has many thoughts on the issue. By way of presentation of measurement information irp may be showing and recording, At the first counting of radioisotope may only testify on the reading device, and the second – provides for registration testimony. Showing the rip depending on how the readings the readings are divided into units with direct and devices with controlled readout. An example of the instrument with direct readout is an ohmmeter, a device with adjustable timing – lo frequency. On the registration form rip divided into recorders and printers. The former provides for the recording of instruments in the form of diagrams, while the second – in the digital printing testimony form.
According to a constructive implementation of rip can be portable, mobile or stationary. On other grounds rip can be: the current value, integrating, summing. Integrating called rip, in which The supplied value is subjected to integration over time, or another independent variable (eg, capacitor frequency). Summing called rip, whose testimony is functionally related to the sum of two or several quantities supplied to it through various channels. (For example, a power meter to measure the amount of signal power of several electrical generators.) IRPs are powered from the mains at 50 and 400 Hz.
Permissible limits of voltage, 50 Hz – + 10%. Permissible limits of voltage frequency of 400 Hz- 5%. The classification includes the following sub-groups and types of devices. A – instruments for measuring current strength: Al – installations or equipment for testing ammeters, A2 – Ammeters DC; A3 – ac ammeters; A7 – ammeters universal; A9 – current converters.