Global Patent Index - EP 1036385 A1

EP 1036385 A1 2000-09-20 - CURRENT LOOP COMPRISING A TEST CIRCUIT

Title (en)

CURRENT LOOP COMPRISING A TEST CIRCUIT

Title (de)

STROMSCHLEIFENSENDER MIT PRÜFSCHALTUNG

Title (fr)

BOUCLE DE COURANT COMPORTANT UN CIRCUIT DE TEST

Publication

EP 1036385 A1 (FR)

Application

EP 99929506 A

Priority

  • FR 9901764 W
  • FR 9809217 A

Abstract (en)

[origin: FR2781301A1] The test circuit is mounted in parallel with the supply circuit to inject a superimposed current (Is) which is added to the detector current (Ic) or the acquisition circuit current (Ia). One mode of operation uses a generator (7) supplying variable voltage (typically to 24 volts) injecting the superimposed current (Is) through the resistance R4, to add to the acquisition current (Ia) in order to permit detection of the lower threshold current of the acquisition system (3). The system has a secondary mode that allows a variable current regulator to inject the superimposed current, to allow detection of the upper threshold of the acquisition system. The intensity of the two currents (Ia,Is) are measured using ammeters (A1,A2) plugged into the circuit at connector points (13,15,17).

IPC 1-7 (main, further and additional classification)

G08C 19/02

IPC 8 full level (invention and additional information)

G08C 19/02 (2006.01)

CPC (invention and additional information)

G08C 19/02 (2013.01)

Citation (search report)

See references of WO 0005695A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

DOCDB simple family

FR 2781301 A1 20000121; FR 2781301 B1 20000908; AT 397262 T 20080615; AU 4629999 A 20000214; BR 9906610 A 20000919; CA 2303980 A1 20000203; CN 1118784 C 20030820; CN 1274452 A 20001122; DE 69938816 D1 20080710; EP 1036385 A1 20000920; EP 1036385 B1 20080528; ID 24131 A 20000706; KR 20010024158 A 20010326; NZ 503395 A 20010427; TR 200000658 T1 20001121; TW 510973 B 20021121; US 6337570 B1 20020108; WO 0005695 A1 20000203