DESCRIPTION

The V9-25 Measurement Voltage Converter Set comprises 3 independent Units (V9-25/0.2, V9-25/10, V9-25/2) of precision linear conversion of ac voltage rms values of wide band signals into dc voltage. The Converter Units differ in input signal level ranges and in nominal values of conversion factors.

The AC-DC Adapter and the Intermediate Power Supply modules are supplied together with 3 Conversion Units.

The Converters are used for precision measurements of ac voltages by means of electrothermal comparison of their levels with dc voltage together with a DC Digital Voltmeter. They are used for verification of dc voltage calibrators (V1, N4, N5 types), AC Voltmeters (V3, V4, V7 types), Generators (G3, G4 types) and Attenuators (D2 types).

The V9-25 Converters may be certified individually:

– in the range up to 30 MHz as comparators-standards of the 1st category in accordance with the GOST 8.458-82 requirements;

– in the range up to 200 MHz as a HF Voltmeter of the 2nd category.

These individually certified Converters have:

– dc-to-ac voltage conversion error less than 0.01 %;

– asymmetry error of less than 0.05 %;

– frequency error decreased by 1.5–2 times.

SPECIFICATIONS

Characteristic	Characteristic value
	V9-25/0.2	V9-25/2	V9-25/10
rms voltage range, Ux	10 mV–0.5В	0.2 V–3.5 V	1 V–10 V
Conversion factor	1	1	0.1
Conversion factor permissable accuracy	± 0.1 % at 0.2 V <Uх<0.5 V ± (0.1–0.15) % at 0.1 V <Uх<0.2 V ± ( 0.15–18) % at 0.01 V <Uх<0.1 V	± 0.05 % at 2 V <Uх<3.5 V ± (0.05–0.1) % at 1 V <Uх<2 V ± ( 0.1–18) % at 0.1 V <Uх<1 V	± 0.05 % at Uх=10 V ± (0.05–0.1) % at 5 V <Uх<10 V ± ( 0.1–18) % at 0.5 V <Uх<5 V
Input resistance	(50 ± 0.125) Ohm	(50 ± 0.125) Ohm	(600 ± 3) Ohm
Frequency range	5 Hz–200 MHz
Permissible conversion accuracy in the frequency range f: 5 Hz<f<10 Hz 10 Hz<f<20 Hz 20 Hz<f<100 kHz 1 MHz<f<5 MHz 5 MHz<f<10 MHz 10 MHz <f<30 MHz 30 MHz <f<50 MHz 50 MHz <f<100 MHz 100 MHz <f<200 MHz	± 0.5 % ± 0.15 % ± 0.05 % ± 0.1 % ± 0.15 % ± 0.25 % ± 0.4 % ±1 % ± 5 %
Output resistance	less than 1 Ohm

GENERAL

Operating temperature range: 15–25 ºС

Power: 220 V, 50 Hz

Power consumption: 9 VА

Dimensions:

Converter Unit: 115х40х30 mm

АС-DC Adapter: 60х60х60 mm

Intermediate Power Module: 40х40х20 mm

Weight:

Converter Unit: 0.3 kg

АС-DC Adapter: 0.3 kg

Intermediate Power Module: 0.3 kg