RO88037B1 - Digital megohmmeter - Google Patents

Digital megohmmeter

Info

Publication number
RO88037B1
RO88037B1 RO112783A RO11278383A RO88037B1 RO 88037 B1 RO88037 B1 RO 88037B1 RO 112783 A RO112783 A RO 112783A RO 11278383 A RO11278383 A RO 11278383A RO 88037 B1 RO88037 B1 RO 88037B1
Authority
RO
Romania
Prior art keywords
voltage
proportional
resistance
measuring
measuring voltage
Prior art date
Application number
RO112783A
Other languages
Romanian (ro)
Other versions
RO88037A2 (en
Inventor
Constantin Harja
ION CîMPEANU
Original Assignee
Institutul Politehnic
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 Institutul Politehnic filed Critical Institutul Politehnic
Priority to RO83112783A priority Critical patent/RO88037A2/en
Publication of RO88037B1 publication Critical patent/RO88037B1/en
Publication of RO88037A2 publication Critical patent/RO88037A2/en

Links

Landscapes

  • Measurement Of Resistance Or Impedance (AREA)

Abstract

Inventia se refera la un magohmetru numeric utilizat pentru masurarea rezistentelor de izolatie sau a tensiunii maxime de functionare la unele componente electronice. Megohmetrul, conform inventiei, este constituit dintr-un convertor c.c/c.c. de înalta tensiune realizat cu un generator de impulsuri controlat în durata care furnizeaza tensiunea de masurare, unui amplificator operational prevazut cu o bucla de reactie care da la iesire o tensiune proportionala cu tensiunea de masurare, un potentiometru cu ajutorul caruia se regleaza continuu tensiunea de masurare, un integrator care pe o pozitie a unui comutator integraza tensiunea unei surse etalon de tensiune si pe alta pozitie a aceluiasi comutator integraza curentul prin rezistenta de masurat, un discriminator de nivel cu o limita egala cu zero si cu alta limita proportionala cu tensiunea de masurare care mentine deschisa o poarta logica atît timp cît tensiunea de la iesirea integratorului se afla între limitele intervalului de discriminare, un generator etalon de frecventa, un numarator care numara impulsurile de la generatorul etalon de frecventa trecute prin poarta logica, numarul de impulsuri înregistrat de numarator fiind proportional cu valoarea tensiunii de masurare sau cu valoarea rezistentei de masurat.The invention relates to a numerical magnetometer used to measure insulation resistance or maximum operating voltage at some electronic components. According to the invention, the megohmmeter is constituted by a cc / cc converter. the high voltage realized with a pulse generator controlled in the duration providing the measuring voltage, to an operational amplifier provided with a feedback loop which outputs a voltage proportional to the measuring voltage, a potentiometer which continuously adjusts the measuring voltage , an integrator that integrates the voltage of a voltage source on a position of a switch and at another position of the same switch integrates the current through the measurand resistance, a level discriminator with a limit equal to zero and another limit proportional to the measuring voltage which maintains a logic gate open as long as the integrator output voltage is within the limits of the discrimination interval, a frequency reference generator, a count which counts the pulses from the frequency reference generator passed through the logic gate, the number of pulses registered by the counter being proportional to the voltage value of m or with the value of the resistance to be measured.

RO83112783A 1983-12-08 1983-12-08 DIGITAL MOGOHMMETER RO88037A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RO83112783A RO88037A2 (en) 1983-12-08 1983-12-08 DIGITAL MOGOHMMETER

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RO83112783A RO88037A2 (en) 1983-12-08 1983-12-08 DIGITAL MOGOHMMETER

Publications (2)

Publication Number Publication Date
RO88037B1 true RO88037B1 (en) 1985-10-31
RO88037A2 RO88037A2 (en) 1985-11-30

Family

ID=20113971

Family Applications (1)

Application Number Title Priority Date Filing Date
RO83112783A RO88037A2 (en) 1983-12-08 1983-12-08 DIGITAL MOGOHMMETER

Country Status (1)

Country Link
RO (1) RO88037A2 (en)

Also Published As

Publication number Publication date
RO88037A2 (en) 1985-11-30

Similar Documents

Publication Publication Date Title
RO88037B1 (en) Digital megohmmeter
US3909824A (en) Non-linear analogue-digital converter for compression coding
SU892334A1 (en) Low frequency digital meter
SU1523982A1 (en) Apparatus for checking ferromagnetic articles
SU754339A1 (en) Digital meter of magnetic induction
SU437982A1 (en) Time-impulse parameter meter
SU1644054A1 (en) Digital meter of magnetic induction
SU757992A1 (en) Automatic variable potential meter
SU572706A1 (en) Magnetic carrier speed variation measuring device
SU930138A1 (en) Measuring dc converter
SU758542A1 (en) Device for cheching noise protection of quantization in communication channel with pulse-code modulation
SU853425A1 (en) Device for measuring cryogenic temperatures
JPS5748665A (en) Resistance component measuring circuit
SU761939A1 (en) Apparatus for measuring direct-current circuit insulation resistance
SU841104A1 (en) Detector of signal pass through zero value
SU529443A1 (en) Multichannel device control
SU375566A1 (en) DIGITAL VOLTMETER
SU1147965A1 (en) Device for checking ferromagnetic articles
SU376892A1 (en) FUNCTIONAL VOLTAGE CONVERTER IN FREQUENCY
SU497726A1 (en) Active power to digital converter
SU385231A1 (en) DIGITAL MEASURING FREQUENCY FOLLOWING
SU932239A1 (en) Electromagnetic flow meter with frequency output
SU390474A1 (en)
SU756311A1 (en) Digital phasemeter of low and infralow frequencies
SU1674028A1 (en) Device for measurements of magnetic field strength