V7-38 Digital Voltmeter - Calibration with REF102B Voltage Reference Source
The V7-38 digital voltmeter with automatic range selection. Display is on IV-3A fluorescent indicators. The voltmeter has a five-digit display.
The V7-38 digital voltmeter has automatic range selection. Display is on IV-3A fluorescent indicators. The voltmeter has a petite display.
This video checks the calibration of the device using a homemade 10-volt calibrator, tested at the Center for Standardization and Metrology. The voltmeter's reference voltage source is based on a KS191U precision zener diode.
Made in the USSR. Soviet digital voltmeter. Home radio laboratory.