V7-21A V7-21A
4.9 63

Voltmeter universal V7-21A (V721A, V-7-21-A, V 7 21 A, b7-21a, V-721A, V 721A, b721a, b-7-21a, b 7 21a, b-721a, b 721a)

Designed for measurement of voltage and DC current, voltage and AC current, resistance. The voltmeter can be used to control and measure these parameters in the production of radio and electric components, with scientific and experimental studies during repair and maintenance work;
Dimensions - 290h200h142mm.

Products catalog

Radiometric devices
voltmeters (V2-, V3-, V4-, V7-, V8-, V9-, F and others)
voltmeters V7
V7-21A voltmeter image.

Price:

on request

 

Get price

Product information updated 06 October 2024.

Found cheaper?

Let us know. Our price is the best. 

Warranty:

12 months.

Warranty extension up to 5 years. 

Terms of delivery:

To all regions of the country, international delivery. 

print

Product information updated 06 October 2024.

Found cheaper?

Let us know. Our price is the best. 

Warranty:

12 months.

Warranty extension up to 5 years. 

Terms of delivery:

To all regions of the country, international delivery. 

print

Accessories, inexpensive analogues and other devices in stock(7)

Technical characteristics

Voltmeter universal V7-21A (V721A, V-7-21-A, V 7 21 A, b7-21a, V-721A, V 721A, b721a, b-7-21a, b 7 21a, b-721a, b 721a)

Voltmeter universal V7-21A purpose intended for measuring of voltage and DC current, voltage and alternating current resistance. The voltmeter can be used to control and measure these parameters in the production of radio and electric components, with scientific and experimental studies during repair and maintenance work.
In the voltmeter provides the ability to remotely manage and display information about the measurement result to the external tsifropechatayuschee unit (CPU).
Technical characteristics of the instrument voltmeter universal V7-21A:
Ambient temperature from 263K to 323K (from -10 º C to +50 ° C);
Relative humidity 98% at a temperature of 298K (25 º C);
Atmospheric pressure from 84kPa to 106kPa;
Measuring ranges of electrical quantities correspond to the values ​​indicated in Table. 1;
 
Table 1 Ranges of electrical quantities V7-21A
Name of measured values
Range of measurement
1. Direct current voltage
2. AC Voltage
3. DC Power
4. AC Power
5. The resistance of
6. The frequency range of the measured voltage AC
7. The frequency range of measurement of AC current
1 ∙ 10 -6 V-10 3
1 ∙ 10 -5 10 3
1 ∙ 10 -11 A-10A
1 ∙ 10 -8 A-10A
1 ∙ 10 -2 ohm-1, 2 ∙ July 10 Ohm
20Hz-1 ∙ May 10 Hz
20Hz-20 ∙ 10 3 Hz

Measurement ranges are divided into sub-bands according to the table. 2;
 
Table 2: Sub-bands measuring electrical quantities V7-21A
Designation of measured values
Ranges
Sub-band measurements
1. Direct current voltage
"= 10 mV"
"~ 100mV"
"~ 1B"
"~ 10V"
"AC 100V"
"~ 1000V"
1 in 10 -6 to 1 ∙ 10 -2 V
from January 10 -5 to 1 ∙ 10-1V
1 10 -4 V to 1V
1 10 -3 V to 10 V
1 10 -2 V to 1 ∙ 10 2
1 10 -1 V to 1 ∙ 10 3
2. AC Voltage
"~ 100mV"
"~ 1B"
"~ 10V"
"AC 100V"
"~ 1000V"
from January 10 -5 to 1 ∙ 10-1V
1 10 -4 V to 1V
1 10 -3 V to 10 V
1 10 -2 V to 1 ∙ 10 2
1 10 -1 V to 1 ∙ 10 3
3. DC Power
"= 100nA"
«= 1 uA"
"= 10uA"
"~ 100uA"
"~ 1mA"
"~ 10mA"
"~ 100mA"
"~ 1000mA"
"~ 10A"
1 10 -11 A to 1 ∙ 10 -7 A
1 10 -10 A to 1 ∙ 10 -6 A
1 10 -9 A to 1 ∙ 10 -5 A
1 A 10 -8 to 1 ∙ 10 -4 A
1 A 10 -7 to 1 ∙ 10 -3 A
1 A 10 -6 to 1 ∙ 10 -2 A
1 A 10 -5 to 1 ∙ 10 -1 A
1 10 -4 A to 1A
1 10 -3 A to 10A
4. AC Power
"~ 100uA"
"~ 1mA"
"~ 10mA"
"~ 100mA"
"~ 1000mA"
"~ 10A"
1 A 10 -8 to 1 ∙ 10 -4 A
1 A 10 -7 to 1 ∙ 10 -3 A
1 A 10 -6 to 1 ∙ 10 -2 A
1 A 10 -5 to 1 ∙ 10 -1 A
1 10 -4 A to 1A
1 10 -3 A to 10A
5. The resistance of
"100 ohm"
"1K"
"10k"
"100k"
"1 M"
"10M"
1 10 -2 ohm to 1 ∙ 10 2 ohms
1 10 -1 ohm to 1 ∙ 10 3 ohms
from 1 ohm to 1 ∙ 10 4 ohms
from 10 ohms to 1 ∙ 10 5 ohms
1 February 10 ohms to 1 ∙ 10 6 ohms
March 10 from 1 ohm to 1,2 ∙ July 10 Ohm
 
Voltmeter V7-21A provides automatic selection of the measuring range of voltage and DC current, resistance;
Determining the polarity of the voltage and DC current are carried out automatically;
Limits of relative basic error of measurement of DC voltage V7-21A:
on the limits of the "= 10mV," "~ 100mV"
δ = ± [0,06 +0,03 (| U to / U x | -1)];
at the limit "~ 1B"
δ = ± [0,04 +0,02 (| U to / U x | -1)];
where δ - the limits of permissible relative basic error in percent of the measured value; U to - the final value of the limit set of measurement; U's - the voltmeter;
Limits of relative basic error in the measurement of DC current B7-21A:
δ = ± [0,1 +0,04 (| I a / I x | -1)];
at the limit "~ 1mA"
δ = ± [0,03 +0,03 (| I to / I x | -1)];
where δ - Output accuracy as a percentage of the measured value;
I to - the final value of the limit set of measurement; I's - the voltmeter;
Limits of relative basic error in the measurement of AC voltage V7-21A:
at the limits "~ 100mV," "~ 1B" in the frequency range from 20Hz to 400Hz, and at the limit "~ 1B" in the frequency range from 10Hz to 50Hz
δ = ± [0,4 +0,05 (| U to / U x | -1)];
in the frequency range from 10 kHz to 50 kHz at the limit "~ 100mV"
δ = ± [0,4 +0,15 (| U to / U x | -1)];
in the frequency range from 400Hz to 10kHz
δ = ± [0,2 +0,05 (| U to / U x | -1)];
at the limits "~ 10V", "100V ~" "~ 1000 V" in the frequency range from 20Hz to 20kHz
δ = ± [0,4 +0,05 (| U to / U x | -1)];
at the limits "~ 100mV," "~ 1B" in the frequency range from 50kHz to 100kHz
δ = ± [1 +0,1 (| U a / U x | -1)];
Maximum permissible error of measurement of AC current B7-21A:
at the limits "~ 100uA," "~ 1mA" in the frequency range from 20Hz to 20kHz
δ = ± [0,4 +0,05 (| I a / I x | -1)];
at the limits "~ 10mA", "~ 100mA" in the frequency range from 20kHz 20Gtsdo
at the limit "~ 10A" at 50Hz
δ = ± [0,6 +0,05 (| I a / I x | -1)];
at the limit "~ 1000mA" in the frequency range from 50Hz to 1000Hz
δ = ± [0,4 +0,05 (| I a / I x | -1)];
where δ - the limits of permissible relative basic error in percent of the measured value; I to - the final value of the limit set of measurement; I's - the voltmeter reading;
When measuring voltage and AC voltmeter V7-21 is calibrated in rms values. The main error is provided in the measurement of voltage and AC current sine wave with harmonic content less than 0.2%, except for the limits "~ 100mA", "~ 1000mA" and "~ 10A" where the harmonic content of not more than 2%. Change voltmeter, caused distortion of the sinusoidal waveform of the measured values ​​do not exceed: half of the maximum permissible relative basic error THD as a percentage not exceeding the maximum permissible relative basic error THD as a percentage not exceeding:

1+0,09δ~-1/3·100,

where δ ~ - basic limits of permissible relative error of measurement of voltage or AC current;
Limits of relative basic error in the measurement of resistance of B7-21A:
δ = ± [0,1 +0,04 (| R a / R x | -1)];
at the limit "1K"
δ = ± [0,06 +0,02 (| R a / R x | -1)];
where δ - the limits of permissible relative basic error in percent of the measured value; R to - the final value of the limit set of measurement; R's - reading voltmeter;
Input impedance voltmeter V7-21A when measuring DC voltage of at least 1 G W to within the "= 10mV," "100mV ~" "~ 1B" and 10 MW ± 0,5 MW at the limits "~ 10V", "AC 100V" "~ 1000V".
Nutrition is a voltmeter AC 220V ± 22V and a frequency of 50 Hz ± 0,2 Hz and harmonic content up to 5%;
The power consumed by a voltmeter V7-21A from the network at the rated voltage does not exceed 14V ∙ A, with a maximum voltage - 18V max ∙ A;
Continuous operation voltmeter operating conditions for at least 16 hours followed by a break of at least 1 hour;
Voltmeter retains its specifications within the rules after the change in him, and a display unit for synchronization with external readjustment of adjustment;
Weight V7-21A - 5.3 kg;
Dimensions V7-21A - 290h200h142mm.
Rate the product: V7-21A
Number of views: 3530
Product rating: 4.4
Number of grades: 514
* rating and all product statistics are updated once a month; information is current as of 23 October 2024

Photos: V7-21A

V7-21A voltmeter image.

V7-21A voltmeter image.

V7-21A front view.

V7-21A front view.

V7-21A side view.

V7-21A side view.

V7-21A rear view.

V7-21A rear view.

V7-21A overhead view.

V7-21A overhead view.

V7-21A bottom view.

V7-21A bottom view.

Poll

How did you find out about zapadpribor.com?

search engines

exhibition

online media

printed editions

colleagues advice

Vote

Leading online store Zapadpribor - a huge selection of measuring equipment for the best value and quality. So you can buy inexpensive devices, we monitor competitors' prices and are always ready to offer a lower price. We only sell quality products at the best prices. On our site you can buy cheaply as the latest innovations and proven equipment from the best manufacturers.

The site includes a special offer «buy at the best price» - if other Internet resources (bulletin board, forum or announcement of another online service) in products presented on our site, the lower price, we will sell it to you even cheaper! Buyers also additional discount for leaving a review or photo of use of our products.

In the price list contains not the whole range of products offered. Prices of goods, not included in the price list can learn to contact the manager. Also, our managers You can get detailed information about how cheap and profitable to buy instrumentation wholesale and retail. Telephone and e-mail for advice on the purchase , delivery or receipt are shown on the description of the goods. We have the most qualified staff, quality equipment and the best price.

 

Online store Zapadpribor - the official manufacturer's dealer test equipment. Our goal - selling high quality goods with best price offer and service to our customers. Our store can not only sell you the necessary instrument, but also offer additional services to its calibration, repair and installation. That you have a pleasant experience when shopping on our site, we have provided special gifts guaranteed to the most popular products.

 

We offer fast international shipping to almost every country in the world: Australia, Austria, Azerbaijan, Albania, Algeria, Anguilla, Angola, Antigua and Barbuda, Argentina, Aruba,  Bahamas, Bangladesh, Barbados, Bahrain, Belize, Belgium, Benin, Bermuda, Bulgaria, Bolivia, Bonaire, Sint-E. and Saba, Bosnia and Herzegovina, Botswana, Brazil, British Virgin Islands, Brunei Darussalam, Burkina Faso, Burundi, Bhutan, VietNam, Vanuatu, Vatican City, Venezuela, Armenia, Gabon, Guyana, Haiti, Gamia, Gambia, Ghana, Guatemala, Guinea, Gibraltar, Honduras, Hong Kong, Grenada, Greenland, Greece, Georgia, Denmark, Democratic Republic of the Congo, Jersey, Djibouti, Dominica, Dominican Republic, Ecuador, Eswatine, Estonia, Ethiopia, Egypt, Zambia, Zimbabwe, Jordan Indonesia, Ireland, Iceland, Spain, Italy, Cape Verde, Kazakhstan, Cayman Islands, Cambodia, Cameroon, Canada, Qatar, Kenya, Kyrgyzstan, China, Cyprus, Kiribati, Colombia, Comoros, Congo, Korea (Rep.), Costa Rica, Kot-d'Ivoire, Cuba, Kuwait, Curacao, Laos, Latvia, Lesotho, Lithuania, Liberia, Lebanon, Libya, Liechtenstein, Luxembourg, Myanmar, Mauritius, Mauritania, Madagascar, Macao, Malawi, Malaysia, Mali, Maldives, Malta, Morocco, Mexico, Mozambique, Moldova, Monaco, Monaco, Namibia, Nauru, Nepal, Niger, Nigeria, Netherlands, Germany, New Zealand, New Caledonia, Norway, UAE, Oman, Cook Islands, Pakistan, Palestine, Panama, Papua New Guinea, Paraguay, Peru, South Africa, Poland, Portugal, Republic of Chad, Rwanda, Romania, El Salvador, Samoa, San Marino, Saudi Arabia, Swaziland, Seychelles, Senegal, Saint Vincent and the Grenadines, Saint Kitts and Nevis, Saint Lucia, Serbia, Singapore, Sint Maarten, Slovakia, Slovenia, Solomon Islands, United Kingdom of Great Britain and Northern Ireland, Sudan, Suriname, East Timor (Timor-Leste), USA, Sierra Leone, Tajikistan, Taiwan, Thailand, Tanzania (United Republic of), Togo, Tonga, Trinidad and Tobago, Tuvalu, Tunisia, Turkey, Turkmenistan, Uganda, Hungary, Uzbekistan, Uruguay, Faroe Islands, Fiji, Philippines, Finland, France, French Polynesia, Croatia, Central African Republic, Czech Republic, Chile, Montenegro, Switzerland, Sweden, Sri Lanka, Jamaica, Japan.

We also provide such metrological procedure: calibration, tare, graduated, testing of measuring instruments.

The online store takes an active part in such procedures as electronic bidding, tender, auction.

If there is no site in the descriptive information you need on the device you can always turn to us for help. Our qualified managers will update for you on the technical characteristics of the device from its technical documentation: user manual, certificate, form, operating instructions, diagram. If necessary, we will take a photo of your device, or a device stand. You can leave feedback on the unit purchased from us, the meter, the device, indicator, or product. Your review for your approval will be published on the site without contact information.

 

Description of the instruments taken from the technical documentation or technical literature. Most pictures of products made directly by our experts prior to shipment of goods. In the description of the device provided the main technical characteristics of the instrument: nominal measuring range, accuracy class, scale, supply voltage, size (size), weight. If the site you see the discrepancy device name (model) specifications, photo or documents attached - let us know - you will get a useful gift with-selling device.

 

While the need to clarify the overall weight and size or the size of the individual meter you can in our service center. If you need our engineers will help you choose the most complete analog or a suitable replacement for the device you are interested. All counterparts and replacement will be tested in one of our laboratories with the full compliance to your requirements.

In the technical documentation for each device or product, information is provided on the list and amount of precious metals content. The documentation gives the exact weight in grams of precious metals: Au gold, palladium Pd, platinum Pt, silver Ag, tantalum Ta and other platinum group metals (PGM) per unit item. These precious metals are found in nature in very limited quantities and therefore have such a high price.

On our website you can familiarize yourself with the technical characteristics of devices and obtain information on the content of precious metals in devices and radio components manufactured in the USSR. We draw your attention to the fact that often the actual content of precious metals differs by 10-25% from the reference one in a smaller direction! The price of precious metals will depend on their value and mass in grams.

All text and graphic information on the site is informative. The color, shade, material, geometric dimensions, weight, content, delivery set and other parameters of the goods presented on the site may vary depending on the batch of production and year of manufacture. Check with the sales department for more information.

 

If you can make repairs to the device yourself, our engineers can provide you with a complete set of necessary technical documentation: circuit diagram TO, ER, FD, PS. We also have an extensive database of technical and metrological documents: technical specifications (TS), the terms of reference (TOR), GOST (DSTU), the industry standard (OST) test procedure, the method of certification, verification scheme for more than 3,500 types of measuring equipment from the manufacturer this equipment. From the site you can download all the necessary software (the software driver) is required for the product purchased.

We carries out repairs and maintenance of measuring equipment in more than 75 different factories of the former Soviet Union and CIS.

We also have a library of legal documents that are related to our field of activity: the law, code, ordinance, decree, temporary position.