GB/T 7274-2015 English PDF

US$259.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 7274-2015: Methods for the measurement of direct inter-electrode capacitances of electronic tubes and valves
Status: Valid

GB/T 7274: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 7274-2015	259	Add to Cart	3 days	Methods for the measurement of direct inter-electrode capacitances of electronic tubes and valves	Valid
GB/T 7274-1987	519	Add to Cart	4 days	Methods for the measurement of direct interelectrode capacitances of electronic tubes and valves	Obsolete

Similar standards

GB/T 12631   GB/T 42742   

Basic data

Standard ID: GB/T 7274-2015 (GB/T7274-2015)
Description (Translated English): Methods for the measurement of direct inter-electrode capacitances of electronic tubes and valves
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: L37
Classification of International Standard: 31.100
Word Count Estimation: 12,195
Date of Issue: 2015-09-11
Date of Implementation: 2016-05-01
Older Standard (superseded by this standard): GB/T 7274-1987
Quoted Standard: GB/T 787-2013; GB/T 2421.1-2008; GB/T 4597
Regulation (derived from): National Standard Announcement 2015 No.25
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This Standard specifies the capacitance between the test tube method using the bridge and the partial pressure method. Bridge method is suitable for tube electrode capacitance range 0.0001pF ~ 4000pF testing. Methods of measurement for arbitration bridge method. This Standard applies to space charge control tube, cathode ray tubes, pneumatic tubes, photocells and vacuum between microwave test tube electrode capacitance.

GB/T 7274-2015: Methods for the measurement of direct inter-electrode capacitances of electronic tubes and valves

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
(Tube electrode capacitance testing methods) ICS 31.100 L37 National Standards of People's Republic of China Replacing GB/T 7274-1987 Tube electrode capacitance test methods Issued on. 2015-09-11 2016-05-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules. This standard replaces GB/T 7274-1987 "Test Method capacitance between the tubes." This standard and GB/T 7274-1987 "capacitance between the tube test method" than there are the following changes. --- Original provisions of the two test methods to determine a method of arbitration; --- Removed not give the definition of "standard header" "commercial header" "Standard shield" and other terminology (see 1987 edition of 2.6.1, 2.6.2 and 2.7); --- Delete the definition and GB/T 4597 in duplicate terms and definitions (see Chapter 1 of the 1987 edition); --- Normative documents adopted national standards in force in number and name; --- Increase the test microwave tubes inter-electrode capacitance requirement (see 4.12); --- In a chapter test program to increase the "means test" and made a test device measurement requirements (see 5.1.2.3) in the article. The standard proposed by the Ministry of Industry and Information Technology of the People's Republic of China. This standard by the National Standardization Technical Committee electric vacuum devices (SAC/TC167) centralized. This standard drafting of the main unit. state-run seventh seventy-six plant. The main drafters of this standard. the British summer, Lin Yu. This standard replaces the standards previously issued as follows. --- GB/T 7274-1987. Tube electrode capacitance test methods

1 Scope

This standard specifies the capacitance between the test tube method using the bridge and the partial pressure method. Bridge method is suitable for tube electrode capacitance range 0.0001pF ~ 4000pF testing. Methods of measurement for arbitration bridge method. This standard applies to space charge control tube, cathode ray tube, inflatable tube, the vacuum between photocell and microwave test tube electrode capacitance.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document. GB/T 787-2013 reception amplifier tubes Mechanical Dimensions GB/T 2421.1-2008 Environmental testing for electric and electronic products and Overview Guide GB/T 4597 tubes vocabulary

3 Terms and Definitions

GB/T 4597 defined by the following terms and definitions apply to this document. 3.1 Coupling capacitor couplingcapacitance In composite pipe and twin tube, while the other element electrode and the reference ground, the other electrode group with one of the electrodes in one electrode group A capacitance between the electrodes.

4 General requirements

4.1 electrode capacitance test should be carried out in GB/T 2421.1-2008 test prescribed in 5.3 standard atmospheric conditions. 4.2 electrode capacitance relative error test shall meet the following requirements. A) when the test is less than 0.001pF capacitor, the relative error of the test. 20% to 20%; b) Test 0.001pF ~ 0.1pF capacitor, the relative error test. ~ 10% -10%; C) When the test is greater than 0.1pF capacitor test relative error. -5% to 5%. 4.3 Unless otherwise specified, the capacitance between the electrodes should be in addition to the voltage test tube capacitance required, the voltage is not applied to any other situation Under the conditions tested. Under the 4.4 capacitance should be directly tested, it should not be used in combination of two or more independent tests determined capacitance. When testing, in addition to the measured power Other than the capacity of the electrode poles are connected to a reference point and the reference point of the circuit should not be confused with application of the ground. 4.5 All types of electrode capacitance test tube, if there are several hot wire or electrode lead, the lead pipes should be connected in a corresponding seat together. Within two or more connected components, should be regarded as a member. For example. in the gate and the cathode is connected, it should be regarded as a cathode. 4.6 Test tube inter-electrode capacitance, can be used to test tube socket, pipe caps, wire, shield or adapters and other special shape of the tube may not be ......

Image     

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 7274-2015_English be delivered?

Answer: Upon your order, we will start to translate GB/T 7274-2015_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 7274-2015_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 7274-2015_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.

Question 5: Should I purchase the latest version GB/T 7274-2015?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 7274-2015 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.