GB1358167A - Intrinsic safety tester - Google Patents
Intrinsic safety testerInfo
- Publication number
- GB1358167A GB1358167A GB5211070A GB5211070A GB1358167A GB 1358167 A GB1358167 A GB 1358167A GB 5211070 A GB5211070 A GB 5211070A GB 5211070 A GB5211070 A GB 5211070A GB 1358167 A GB1358167 A GB 1358167A
- Authority
- GB
- United Kingdom
- Prior art keywords
- circuit
- capacitor
- intrinsic safety
- inductance
- switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2832—Specific tests of electronic circuits not provided for elsewhere
- G01R31/2836—Fault-finding or characterising
- G01R31/2837—Characterising or performance testing, e.g. of frequency response
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
1358167 Measuring intrinsic safety R J REDDING 29 Oct 1971 [3 Nov 1970] 52110/70 Heading G1U The intrinsic safety of a circuit 1, i.e., its inductance since this determines the size of the spark produced when current in the circuit is interrupted, is measured by first establishing a known current from a battery 4 through the circuit via a contact 7, and then opening the contact 7 and integrating, on a capacitor 8, the energy emitted by the circuit. The resulting potential on the capacitor 8 is then a measure of the inductance of the circuit 1 under test. A switch 11 may be closed to discharge the capacitor prior to a test. Different sizes of capacitor 8 may be selected by a switch 14, and a reference inductance 12 may be included in the circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5211070A GB1358167A (en) | 1970-11-03 | 1970-11-03 | Intrinsic safety tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5211070A GB1358167A (en) | 1970-11-03 | 1970-11-03 | Intrinsic safety tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1358167A true GB1358167A (en) | 1974-06-26 |
Family
ID=10462681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5211070A Expired GB1358167A (en) | 1970-11-03 | 1970-11-03 | Intrinsic safety tester |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1358167A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112649685A (en) * | 2020-12-15 | 2021-04-13 | 浙江中控技术股份有限公司 | Safety grid testing method and device |
-
1970
- 1970-11-03 GB GB5211070A patent/GB1358167A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112649685A (en) * | 2020-12-15 | 2021-04-13 | 浙江中控技术股份有限公司 | Safety grid testing method and device |
| CN112649685B (en) * | 2020-12-15 | 2024-04-05 | 浙江中控技术股份有限公司 | Safety grid testing method and device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |