Portable Wheatstone Bridge

Model : 55X-WB

DESCRIPTION-

“RAI” Portable Wheatstone Bridge Model 55X-WB has been specially designed for the measurement of resistance in the range of 0.01 ohm to 1.0 Megohm. This wheatstone bridge provides a wide resistance measurement spectrum coupled with excellent accuracy of the order of ±0.05%.

The instrument is designed on the proven wheatstone bridge measurement principle and is suitable for laboratory, industrial, research, testing, and on-field resistance measurement applications. These capabilities have been realized by using non-inductive imported manganin wire (German Make).

In addition, precision phosphor-bronze, silver-plated band switches have been utilized to minimize contact resistance errors to 0.0005 ohm per switch. The manganin coils have been subjected to a long ageing process to eliminate possible variations in resistance values due to climatic temperature variations. All coils have been properly insulated with high-grade insulation material to minimize variation in resistance values.

The measurement arrangement and connection method of the instrument can be understood through a wheatstone bridge diagram, which illustrates the bridge arms, ratio arms, unknown resistance, and measurement arrangement.

APPLICATIONS

• Telecommunication & cable manufacturing industries.

• Petro-chemical & processing industries.

• Standard resistance manufacturing industries.

• Testing, batch checking & standardization of cables.

• Research & engineering institutions.

• Defense equipment testing.

• On-field testing.

• Electronics & electrical engineering laboratories.

• Transformer & rectifier industries.

• Resistance measurement using the wheatstone bridge principle.

FEATURES

• Ideal for fault location in cables by Varley and Murray Loop Test.

• Battery as well as mains operated.

• Portable and completely self-contained.

• Self-cleaning and hard silver-plated low-contact-resistance switches.

• Precision coefficient of thermal linear expansion.

• Built-in super-sensitive analogue galvanometer.

• Manganin wire having a very low temperature coefficient.

• Wide measurement capability from 0.01 ohm to 1.0 Megohm.

• Designed as a reliable portable wheatstone bridge for laboratory and field applications.

• Suitable for accurate resistance measurement based on the wheatstone bridge principle.

SPECIFICATION

WHEATSTONE BRIDGE DIAGRAM

A wheatstone bridge diagram can be used to explain the operating principle and electrical connection of the Portable Wheatstone Bridge. It typically represents the four-arm bridge arrangement, ratio arms, unknown resistance, galvanometer, and source connection used for resistance measurement.

Frequently Asked Questions

1. What is a Portable Wheatstone Bridge?

A portable wheatstone bridge is a precision resistance measurement instrument based on the Wheatstone bridge principle. The 55X-WB is designed for laboratory, industrial, research, testing, and field resistance measurements.

2. What is the resistance range of the 55X-WB?

The Portable Wheatstone Bridge provides a wide resistance measurement range from 0.01 ohm to 1.0 Megohm, making it suitable for various low- and medium-resistance measurement applications.

3. What is a Wheatstone Bridge used for?

A wheatstone bridge is used to accurately measure unknown resistance by comparing it with known resistance values in a balanced bridge arrangement. The 55X-WB is also suitable for cable fault location using Varley and Murray Loop Tests.

4. What does a Wheatstone Bridge diagram show?

A wheatstone bridge diagram typically shows the four-arm bridge arrangement, ratio arms, unknown resistance, galvanometer, and electrical source connections used for resistance measurement.

5. What accuracy does the Portable Wheatstone Bridge provide?

The 55X-WB provides an overall accuracy of approximately ±0.05%, with ±0.05% accuracy for the series arm and ±0.02% for the ratio arms.