GB1220063A - Testing electric circuits - Google Patents

Testing electric circuits

Info

Publication number
GB1220063A
GB1220063A GB3122667A GB3122667A GB1220063A GB 1220063 A GB1220063 A GB 1220063A GB 3122667 A GB3122667 A GB 3122667A GB 3122667 A GB3122667 A GB 3122667A GB 1220063 A GB1220063 A GB 1220063A
Authority
GB
United Kingdom
Prior art keywords
circuit
zener diode
testing
july
meter
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
Application number
GB3122667A
Inventor
Christopher William Briggs
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
South Eastern Gas Board
Original Assignee
South Eastern Gas Board
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by South Eastern Gas Board filed Critical South Eastern Gas Board
Priority to GB3122667A priority Critical patent/GB1220063A/en
Publication of GB1220063A publication Critical patent/GB1220063A/en
Expired legal-status Critical Current

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

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)

Abstract

1,220,063. Circuit testing. SOUTH EASTERN GAS BOARD. July 5, 1968 [July 6, 1967], No. 31226/67. Heading G1U. A circuit including a force balance transmitter 10 incorporates a zener diode 16 through which a signal current from the transmitter normally flows when the circuit is operational, and the circuit is adapted so that a testing circuit may be connected in parallel with the Zener diode, in order to test the operation of the circuit. The force balance transmitter controls a current in the circuit, derived from a separate power source 14, as a function of a measured value in e. g. a chemical processing plant, whose operation is to be controlled or indicated at 11, independently of changes of resistance in other parts of the circuit. Contacts are provided at either side of the Zener diode and may be connected to a socket 17 to which a meter 15 is connectible via a plug 18. The connection of the meter will by-pass the diode, without breaking operation of the circuit. Two Zener diodes connected back to back may be used Fig. 6 (not shown).
GB3122667A 1967-07-06 1967-07-06 Testing electric circuits Expired GB1220063A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3122667A GB1220063A (en) 1967-07-06 1967-07-06 Testing electric circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3122667A GB1220063A (en) 1967-07-06 1967-07-06 Testing electric circuits

Publications (1)

Publication Number Publication Date
GB1220063A true GB1220063A (en) 1971-01-20

Family

ID=10319930

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3122667A Expired GB1220063A (en) 1967-07-06 1967-07-06 Testing electric circuits

Country Status (1)

Country Link
GB (1) GB1220063A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008031027A1 (en) * 2008-06-30 2009-12-31 Texas Instruments Deutschland Gmbh Automatic testing device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008031027A1 (en) * 2008-06-30 2009-12-31 Texas Instruments Deutschland Gmbh Automatic testing device
US8125238B2 (en) 2008-06-30 2012-02-28 Texas Instruments Deutschland Gmbh Automatic test equipment

Similar Documents

Publication Publication Date Title
ES8306292A1 (en) Solid-state load protection system having ground fault sensing
SE7906705L (en) CLUTCH DEVICE FOR MONITORING A CONSUMER
AU527910B2 (en) Kilowatt-hour meter
GB1133750A (en) Electrical barrier device
GB1278632A (en) Improvements relating to measuring and testing electrical circuits
GB1220063A (en) Testing electric circuits
GB1475810A (en) Testing an electrical supply installation
ES198628U (en) Safety indicator for electrical appliances. (Machine-translation by Google Translate, not legally binding)
GB1333918A (en) Instruments for checking the operation of earth leakage circuit breakers
GB1212039A (en) Boundary value voltage or current sensors
GB1283012A (en) Improvements in or relating to electrical signalling apparatus
GB1072822A (en) Electrical continuity testers
GB1429180A (en) Alarm circuits
SE340126B (en)
JPS54161381A (en) Temperature detector
GB1204651A (en) Electrical current flow indicating system
ES365309A1 (en) Meter for measuring different ranges of alternating electrical quantities
GB977769A (en) Improvements in or relating to electrical circuits for use with temperature responsive devices
GB1270129A (en) Earth fault detection circuitry
GB1288383A (en)
JPS5290049A (en) Earth detection circuit
GB1376592A (en) Electrical supply indicating arrangements
JPS5279959A (en) Self-checking sensor
GB1385906A (en) Electric current leakage indicator
GB1288772A (en)