Customer Support: +44 (0)203 327 3140

Login to i2i Subscription Intertek.com
  • There are no items in your cart
We noticed you’re not on the correct regional site. Switch to our AMERICAS site for the best experience.
Go to AMERICAS site
Dismiss alert
Please enter a keyword to search
Advanced search

BS 4542:1970

Current
Current

The latest, up-to-date edition.

Method for determination of loss tangent and permittivity of electrical insulating materials in sheet form (Lynch method)
Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

30-01-1970

Publisher

British Standards Institution

Cooperating organizations
Foreword
Method
1. Scope
2. Principle of method
3. Accuracy and range
4. Temperature of test specimen, and test frequency
5. Apparatus: the electrodes
6. Apparatus: the bridge network
7. The specimen
8. Method
9. Calculation
Appendix
A. Bridge apparatus
Figures
1. General arrangement of electrode system
2. Method of introducing small variable conductance
3. Five-arm network

Accuracy and range, description of the apparatus, the form of specimen, procedures to be followed and the necessary calculation for determination over a frequency range of 1 kHz to 100 kHz. Precautions are given for extending the range to 1 MHz. Supplements the Hartshorn and Ward method of BS 2067.

This British Standard describes the Lynch method for the determination of the loss tangent and the permittivity of insulating materials at frequencies of 1 kHz to 100 kHz at normal room temperatures. It gives details of the apparatus and of the procedure to be followed.

The frequency range can be extended downward to 50 Hz unless the surface resistivity of the specimen is low (e.g. 1010 Ω). It can be extended upward to 1 MHz by taking the precautions suggested in Clause 6 and in Appendix A.

Committee
GEL/15
DevelopmentNote
Supersedes 66/25997 DC and 91/48847 DC (08/2005) Reviewed and confirmed by BSI, October 2012. (09/2012)
DocumentType
Standard
Pages
12
PublisherName
British Standards Institution
Status
Current
Supersedes

Standards Relationship
IEC 60250:1969 Similar to

BS EN 60249-1:1993 Base materials for printed circuits Base materials for printed circuits. Test methods

BS 2067:1953 Determination of power-factor and permittivity of insulating materials (Hartshorn & Ward method)

View more information
£120.00
Excluding VAT
GBP
CAD
CHF
CNY
DKK
EUR
GBP
HKD
IDR
INR
JPY
KRW
MXN
NOK
NZD
SEK
SGD
USD
ZAR
Hardcopy - English
PDF - English
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50

Access your standards online with a subscription

Features

  • Simple online access to standards, technical information and regulations.

  • Critical updates of standards and customisable alerts and notifications.

  • Multi-user online standards collection: secure, flexible and cost effective.

Learn more on subscription solutions

or

Get in touch with us