Apparatus for calibrating electronic battery tester
First Claim
1. An apparatus for calibrating an electronic battery tester, the battery tester of the type having first and second battery tester Kelvin connections configured to couple to terminals of a battery, the apparatus comprising:
- a first Kelvin connection having an A′
terminal and a C′
terminal configured to couple to the first battery tester Kelvin connection;
a second Kelvin connection having a B′
terminal and a D′
terminal configured to couple to the second battery tester Kelvin connection;
a calibrated shunt in series with a power supply connected between the A′
terminal of the first Kelvin connection and the B′
terminal of the second Kelvin connection, the calibrated shunt having a calibrated resistance value; and
an active shunt in series connected between the C′
terminal of the first Kelvin connection and the D′
terminal of the second Kelvin connection, the active shunt providing a calibrated apparent resistance between the C′ and
D′
terminals which is a function of the calibrated resistance value of the calibrated shunt.
1 Assignment
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Accused Products
Abstract
A calibration fixture is provided for calibrating an electronic battery tester which has first and second battery tester Kelvin connections configured to couple to terminals of a battery. The calibration fixture includes a first Kelvin connection has an A′ terminal and a C′ terminal configured to couple to the first battery tester Kelvin connection and a second Kelvin connection having a B′ terminal and a D′ terminal configured to couple to the second battery tester Kelvin connection. A calibrated shunt is in series with a power supply connected between the A′ terminal of the first Kelvin connection and the B′ terminal of the second Kelvin connection. The calibrated shunt has a calibrated resistance value. An active shunt is placed in series between the C′ terminal of the first Kelvin connection and the D′ terminal of the second Kelvin connection. The active shunt provides a calibrated apparent resistance between the C′ and D′ terminal which is a function of the calibrated resistance value of the calibrated shunt.
325 Citations
20 Claims
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1. An apparatus for calibrating an electronic battery tester, the battery tester of the type having first and second battery tester Kelvin connections configured to couple to terminals of a battery, the apparatus comprising:
-
a first Kelvin connection having an A′
terminal and a C′
terminal configured to couple to the first battery tester Kelvin connection;
a second Kelvin connection having a B′
terminal and a D′
terminal configured to couple to the second battery tester Kelvin connection;
a calibrated shunt in series with a power supply connected between the A′
terminal of the first Kelvin connection and the B′
terminal of the second Kelvin connection, the calibrated shunt having a calibrated resistance value; and
an active shunt in series connected between the C′
terminal of the first Kelvin connection and the D′
terminal of the second Kelvin connection, the active shunt providing a calibrated apparent resistance between the C′ and
D′
terminals which is a function of the calibrated resistance value of the calibrated shunt.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of calibrating an electronic tester, the battery tester of the type having first and second battery tester Kelvin connections configured to couple to terminals of a battery, the method comprising:
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connecting a first Kelvin connection having an A′
terminal and a C′
terminal to the first battery tester Kelvin connection;
connecting a second Kelvin connection having a B′
terminal and a D terminal to the second battery tester Kelvin connection;
providing a calibrated apparent resistance between the C′ and
D′
terminals which is a function of a calibrated shunt coupled in series with a power supply between the A′ and
B′
terminals.- View Dependent Claims (18, 19, 20)
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Specification