An analog multimeter uses a microammeter
that includes a pointer moving over a calibrated scale to make various types of measurements.
Plane electrode 1 is grounded via microammeter
6 destined for measurement of the total electrode current.
Recording device of the instrument is M 907-10 microammeter
with digitized scale for coefficients of transmission and optical density.
A multirange microammeter
was used to measure the voltage supplied, and the temperature of the thermocouple was read by a digital thermometer to an accuracy of 0.1 K.
The electrical voltage activates a microammeter
that causes a deflection of the needle.