58results about How to "Small zero potential" patented technology

A voltage measuring instrument with the minimum stepping reaching 0.1 muV includes a first stepping panel composed of a measuring panel and two bracket panels without welding resistance, a second stepping panel comprising a measuring panel formed of a 9x9 ohm ring resistance meshwork and two 1 ohm resistance, a bracket panel formed by a ten 0.5 ohm resistances, a third stepping panel comprising of a measuring panel of 10x1 ohm and a substitution panel. Each contact of the forth stepping panel is connected with the corresponding contact of the measuring panel of the third stepping panel, and two resistances of 100 ohm are used to shunt current for range conversion at x1, x0.1 range with the minimum resolution reaching 0.1 muV, the measuring panels are connected by conductors without on-off switch, which is capable of ignoring variation and potential effect when measuring by voltage measuring instrument.

A 0.1 micro V-resolution voltage measuring instrument is provided. The 0.1 micro V-resolution voltage measuring instrument is used for direct current voltage measurement. According to the 0.1 micro V-resolution voltage measuring instrument, a first stepping disc is formed by a measuring disc composed of 23 1-ohm resistors; a second stepping disc is composed of a measuring disc and a replacement disc, wherein the measuring disc is composed of 10 0.1-ohm resistors; a third stepping disc is composed of a measuring disc and a replacement disc, wherein the measuring disc is composed of 10 0.1-ohm resistors; each contact on a fourth stepping disc and a five stepping disc is connected with corresponding contacts on the measuring disc in the third stepping disc, such that the fourth stepping disc and the five stepping disc do not need any resistors; the voltage measuring instrument has two measuring ranges; the minimum resolution of the voltage measuring instrument is 0.1 micro V; the second stepping disc adopts special wiring, such that voltage on lead resistors inside the voltage measuring instrument is almost zero; and when the 0.1 micro V-resolution voltage measuring instrument is utilized to perform measurement, the influence of zero potential and thermoelectric potential can be ignored.

The invention discloses a voltage measuring apparatus with a temperature compensation plate for measuring a direct current voltage. Each of four rear stepping plates of the voltage measuring apparatus with the temperature compensation plate is composed of a measuring plate and a replacing plate which is structurally identical to the measuring plate, and after the corresponding contacts on the measuring plates and the replacing plates of the four rear stepping plates are connected with each other, three stepping plates do not have resistance. By means of the voltage measuring apparatus with the temperature compensation plate, the influence of the lead resistance in the voltage measuring apparatus, the switch contact resistance and variation, and the thermal electromotive force on the voltage measuring apparatus can be neglected.

This invention relates to a two range potential meter with three measuring tray used for constant voltage measuring. The initiative input tray of this invention is composed by measuring tray and assistant tray; the second step input tray has measuring tray composed by 11X11 omega annular resistance net, and assistant tray composed by ten 0.5 omega resistance; the third tray is double slide wire tray, two measuring tray connect with measuring slide wire by wire, not use switch for switching, remove the impact of variation and thermoelectric force while potential meter measuring, the distinguish ability can reach 1 mu V; the invention omits the substitution tray of first and second input trays.

This invention relates to a potential meter with three measuring tray used for constant voltage measuring. The initiative input tray composed by measuring tray and assistant tray ; the second step input tray has measuring tray composed by 11X11 omega annular resistance net, and assistant tray composed by ten 0.5 omega resistance; the third tray is double slide wire tray, two measuring tray connect with measuring slide wire by wire, not use switch for switching, remove the impact of variation and thermoelectric force while potential meter measuring; the invention omits the substitution tray of first and second input trays.

The invention discloses a micro-electric potential measurement instrument provided with four stepping plates and used for DC (Direct Current) voltage measurement. The micro-electric potential measurement instrument has two measuring ranges; each stepping plate is composed of a measuring plate and a replacing plate having the same structure as the measuring plate; a resistor is welded between contacts of both the measuring plate and the replacing plate on the first stepping plate, and no resistor exists on the rest stepping plates. According to the micro-electric potential measurement instrument, resistance of leads inside the micro-electric potential measurement instrument, contact resistance and variation of a switch, and an influence from thermoelectric potential to the instrument can be ignored.

A voltage measuring instrument capable eliminating variation and thermal potential effect includes a first stepping panel composed of a measuring panel and two bracket panels without containing resistance, a second stepping panel comprising a measuring panel formed of a ring connected by ten resistance of 100 ohm and a 10 ohm resistances, a bracket panel formed by a 10x5 ohm, a third stepping panel comprising of a measuring panel of 10x10 ohm and a substitution panel. Each contact of the forth stepping panel is connected with the corresponding contact of the measuring panel of the third stepping panel, and the measuring panels are connected by conductors without on-off switch, which is capable of ignoring variation and thermal potential effect when performing measurement by voltage measuring instrument. The voltage measuring instrument is provided with four extended ranges of x10, x1, x0.1 and x0.01 with the maximum measuring voltage of 2.31V, the minimum resolution of 0.1muV.

A voltage measurer with no variation is prepared as forming the first stepping disc by one measurement disc and two auxiliary discs, forming the second stepping disc by measurement disc with 9x9 omega ring resistance net and two 1 omega resistance as well as auxiliary disc with 10x0.5 omega resistances, forming the third stepping disc by 10x1 omega measurement disc and 10x1 omega replacement disc, connecting various contacts of the fourth stepping disc to relevant contacts on measurement disc of the third stepping disc, connecting all said measurement discs by wire without using any switch and connecting certain resistances in circuit.

A multi-range voltage measuring instrument includes a first stepping panel composed of a measuring panel having 21x100 ohm and bracket panel I' and I'' without resistance, a second stepping panel comprising a measuring panel formed of a resistance ring of 9x90 ohm and two 10 ohm resistances, a bracket panel formed by a 10x5 ohm, a third stepping panel comprising of a measuring panel of 10x10 ohm and a substitution panel. Each contact of the forth stepping panel is connected with the corresponding contact of the measuring panel of the third stepping panel, and the measuring panels are connected by conductors without on-off switch, which is capable of ignoring variation and thermal potential effect when measuring by voltage measuring instrument. The voltage measuring instrument with the maximum measuring voltage of 2.31V and the minimum resolution of 0.1 muV is provided with four ranges of x10, x1, x0.1, x0.01.

The invention provides a voltage measuring device with five step panels. The voltage measuring device with the five step panels is used for measuring DC voltage. The device is characterized in that four rear step panels are all composed of measuring panels, and replacement panels that are structured the same as the measuring panels. According to the voltage measuring device with the five step panels, the measuring panels of the four rear step panels are connected with corresponding contacts on the replacement panels, then three of the four step panels are free of resistance, and therefore, the influence of resistance of an internal lead in the voltage measuring, switch contact resistance and variation, and thermoelectric potential on the voltage measuring device can be ignored.

A four-range voltage measuring instrument with shunt branch includes a first stepping panel composed of a measuring panel and two bracket panels without resistance, a second stepping panel comprising a measuring panel formed of a ring connected by nine resistance of 90 ohm and two 10 ohm resistance, a bracket panel formed by a ten resistances of 5 ohm, a third stepping panel comprising of a measuring panel of 10x10 ohm and a substitution panel. Each contact of the forth stepping panel is connected with the corresponding contact of the measuring panel of the third stepping panel, and the measuring panels are connected by conductors without on-off switch, which is capable of ignoring variation and thermal potential effect when measuring by voltage measuring instrument. The voltage measuring instrument with the maximum measuring voltage of 2.31V and the minimum resolution of 0.1 muV is provided with four ranges of x10, x1, x0.1, x0.01.

A voltage measuring instrument capable eliminating thermal potential effect includes a first stepping panel composed of a measuring panel and two bracket panels without containing resistance, a second stepping panel comprising a measuring panel formed of a ring resistance meshwork of 9x9 ohm and two 1 ohm resistance, a bracket panel formed by a 10x0.5 ohm, a third stepping panel comprising of a measuring panel of 10x1 ohm and a substitution panel. Each contact of the forth stepping panel is connected with the corresponding contact of the measuring panel of the third stepping panel, and three resistances of 80 ohm, 720 ohm and 7200 ohm and resistance measuring meshwork are parallel in the circuit for range conversion with the minimum resolution reaching 0.1 muV, the measuring panels are connected by conductors without on-off switch, which is capable of ignoring variation and potential effect when measuring by voltage measuring instrument.

Disclosed is a micro-voltage measuring device for DC (direct current) voltage measurement. According to the micro-voltage measuring device, every step plate is composed of a measuring plate and a replacing plate which are of the same structure; a resistor is welded between the contacts of the measuring plate and the replacing plate of the first step plate, and the others of the step plates are not provided with resistors, so that the influence of internal wire resistance, switch contact resistance and variation and thermoelectric force of the micro-voltage measuring device on the micro-voltage measuring device can be negligible.

The invention discloses a two-range potential difference meter with three measuring dials for measuring direct voltage. A first stepping dial comprises a measuring dial and an auxiliary dial; a second stepping dial comprises a measuring dial formed by a 11*11 ohm annular resistor net, and an auxiliary dial formed by ten 0.5 ohm resistors; a third dial is a double-slide wire dial, wherein the two measuring dials are connected with the measuring slide wires through leads, instead of switching by a switch, so that the variation and the thermoelectric potential influence can be avoided when the potential difference meter is used for measuring, and the resolution ratio can be up to 1 <mu>V; furthermore, the replacing dials for the first stepping dial and the second stepping dial can be avoided.

A voltage measurement instrument is prepared as forming the first stepping disc by one measurement disc and two auxiliary discs, forming the second stepping disc by measurement disc with 9x9 omega ring resistance net and two 1omega resistance as well as auxiliary disc with 10x0.5 omega resistances, forming the third stepping disc by 10x1 omega measurement disc and 10x1 omega replacement disc, connecting various contacts of the fourth stepping disc to relevant contacts on measurement disc of the third stepping disc, connecting all said measurement discs by wire without using any switch and connecting certain resistances in circuit.

A voltage measuring instrument with a resolution of 0.1muV for DC voltage measurement includes a first stepping panel composed of a measuring panel having 21x10 ohm and bracket panel I' and I'' without resistance, a second stepping panel comprising a measuring panel formed of a resistance ring of 9x9 ohm and two 1 ohm resistances meshwork, a bracket panel formed by a 10x0.5 ohm, a third stepping panel which is a dual-sliding panel. The two measuring panels and measuring sliding are connected by conductors without on-off switch, which is capable of non-existing variation and thermal potential effect when measuring by voltage measuring instrument using a resistance of 13ohm for shunt current, thereby obtaining two extended ranges of x1, x0.1 with resolution of 0.1muV, and omitting substitution panel of the first stepping panel and the second stepping panel.

The invention relates to a voltage measuring device. According to the voltage measuring device, a first stepping panel is constituted by a measuring panel and two bracket panels without welding resistors; a second stepping panel consists of a measuring panel and a bracket panel, the measuring panel is constituted by an annular resistor network of 9*9 omega and two 1-omega resistors, and the bracket panel is constituted by ten 0.5-omega resistors; a third stepping panel is constituted by a measuring panel of 10*1 omega and a replacing panel; all contact points of a fourth stepping panel are connected with corresponding contact points on the measuring panel of the third stepping panel an 800-omega resistor, a 7200-omega resistor and a resistor measuring network are in parallel connection with one another in a circuit for range switching, and the minimal resolution ratio reaches 1 [mu]V; the measuring panels are connected with one another through wires. According to the voltage measuring device, switching is realized not through a switch, so that when the voltage measuring device is used for measuring, the influence of variation and thermoelectric potential can be avoided.

A portable potential difference meter with three measurement range is prepared as forming the first stepping plate by 21x10omega measurement disc and auxiliary disc without resistance, forming the second stepping plate by using 10x10omegacircular resistance net to form measurement disc, forming auxiliary disc by 10x0.5omega resistances, setting the third plate to be double slide-wire disc and using wire to connect two measurement discs with measurement slide-wire.

This invention relates to a four range potential meter with three measuring tray used for constant voltage measuring. The initiative input tray is composed by measuring tray and assistant tray ; the second step input tray has measuring tray composed by ten 100 omega annular resistance net, and assistant tray composed by ten 5 omega resistance; the third tray is double slide wire tray, two measuring tray connect with measuring slide wire by wire, not use switch for switching, remove the impact of variation and thermoelectric force while potential meter measuring, the distinguish ability can reach 0.1 mu V; the invention omits the substitution tray of first and second input trays.

This invention relates to a four range potential meter with three measuring tray used for constant voltage measuring. The initiative input tray composed by measuring tray and assistant tray; the second step input tray has measuring tray composed by 10X110 omega annular resistance net, and assistant tray composed by ten 5 omega resistance; the third tray is double slide wire tray, two measuring tray connect with measuring slide wire by wire, not use switch for switching, remove the impact of variation and thermoelectric force while potential meter measuring, the distinguish ability can reach 0.1 mu V; this invention omits the substitution tray of first and second input trays.

This invention relates to a two range potential meter with three measuring tray used for constant voltage measuring. The initiative input tray composed by measuring tray of 21X 10 omega and assistant tray A'and A'without resistance; the second step input tray has measuring tray composed by 10X10 omega annular resistance net, and assistant tray composed by ten 0.5 omega resistance; the third tray is double slide wire tray, two measuring tray connect with measuring slide wire by wire, not use switch for switching, remove the impact of variation and thermoelectric force while potential meter measuring, the distinguish ability can reach 1 mu V; this invention omits the substitution tray of first and second input trays.

A voltage measuring device with a wide measurement range, its first stepping plate is composed of 21×100Ω measuring plate and auxiliary plate I’ and I” without resistance, and the second stepping plate is composed of 9×90Ω The ring resistance and two 10Ω resistor nets constitute the measuring panel, and the 10×5Ω resistor forms the auxiliary panel, and the third panel is a double-sliding line panel, and the two measuring panels are connected with the measuring sliding wires with wires, and the voltage is not switched by a switch. The measuring device has no variation and thermoelectric potential influence during the DC voltage measurement, and the replacement disks of the first and second stepping disks are omitted. This voltage measuring device has four types: ×10, ×1, ×0.1, ×0.01 The maximum measurement voltage is 2.31V, and the high and low resolution is 0.1μV.

A voltage measurement instrument is prepared as forming the first stepping disc by one measurement disc and two auxiliary discs, forming the second stepping disc by measurement disc with 9x9 omega ring resistance net and two 1omega resistance as well as auxiliary disc with 10x0.5 omega resistances, forming the third stepping disc by 10x1 omega measurement disc and 10x1 omega replacement disc, connecting various contacts of the fourth stepping disc to relevant contacts on measurement disc of the third stepping disc, connecting all said measurement discs by wire without using any switch and connecting certain resistances in circuit.

This invention relates to a three range potential meter with three measuring tray used for constant voltage measuring. The initiative input tray of this invention is composed by measuring tray of 21X 10 omega and assistant tray A and A'without resistance; the second step input tray has measuring tray composed by 11X11 omega annular resistance net, and assistant tray composed by ten 0.5 omega resistance; the third tray is double slide wire tray, two measuring tray connect with measuring slide wire by wire, not use switch for switching, remove the impact of variation and thermoelectric force while potential meter measuring, the distinguish ability can reach 0.1 mu V; the invention omits the substitution tray of first and second input trays.

This invention relates to one two-process level difference meter with three test panels for direct current voltage test, wherein its first feed panel is composed of 21X10Omega test panel and aid panel I', I' without resistance; the second feed panel forms measurement panel by 9X9Omega ring resistance and two 1Omega resistance forms aid panel by 10X0. 5Omega resistance; the third panel is of double slide panel and its two test panels and measurement slide lines are connected by wire not through switch free from impact of difference and thermal potential to get two process by 13Omega resistance with resolution rate as 1muV to save first and second switch panels.

A four-range voltage measuring instrument with shunt branch includes a first stepping panel composed of a measuring panel and two bracket panels without resistance, a second stepping panel comprisingameasuring panel formed of a ring connected by nine resistance of 90 ohm and two 10 ohm resistance, a bracket panel formed by a ten resistances of 5 ohm, a third stepping panel comprising of a measuri ng panel of 10x10 ohm and a substitution panel. Each contact of the forth stepping panel is connected with the corresponding contact of the measuring panel of the third stepping panel, and the measuring panels are connected by conductors without on-off switch, which is capable of ignoring variation and thermal potential effect when measuring by voltage measuring instrument. The voltage measuringinstrument with the maximum measuring voltage of 2.31V and the minimum resolution of 0.1 muV is provided with four ranges of x10, x1, x0.1, x0.01.

A four-range portable potentiometer with three measuring discs for DC voltage measurement. Its first stepping disc is composed of a measuring disc and an auxiliary disc, and the second stepping disc is composed of ten 100Ω ring resistance nets to form a measuring disc. , the auxiliary plate is composed of 10 5Ω resistors, the third plate is a double slide wire plate, the two measuring plates are connected with the measuring slide wires by wires, and are not switched by switches, so that there is no variation and thermoelectric potential in the measurement of the potentiometer Influence, there are four ranges, in the ×0.01 range, the minimum resolution reaches 0.1μV, and the replacement discs of the first and second step discs are omitted.

A voltage measuring device that overcomes the influence of thermoelectric potential. Its first stepping disc is composed of a measuring disc and two auxiliary discs that are not welded with resistors. The second stepping disc is composed of a 9×9Ω ring resistance network and two The 1Ω resistor constitutes the measuring disk, ten 0.5Ω resistors form the auxiliary disk, the third stepping disk is composed of a 10×1Ω measuring disk and a replacement disk, each contact of the fourth stepping disk is connected to the third stepping disk The corresponding contacts on the middle measuring board are connected, and three resistances of 80Ω, 720Ω and 7200Ω are connected in parallel with the resistance measuring network in the circuit for range conversion, the minimum resolution is 0.1μV, and the measuring boards are connected by wires without switches. , so that the voltage measurement device can ignore the variation and the influence of thermoelectric potential.