Precision DC Potentiometer

Model : 55X-DCP

DESCRIPTION-

The “RAI” Precision DC Potentiometer Model 55X-DCP has been designed to provide the highest standards of accuracy over a period of many years without maintenance. This precision instrument is suitable for accurate measurement of potential, current, and resistance and can be used as a reliable dc potentiometer for laboratory and calibration applications.

The instrument is designed on the principles used in a dc crompton potentiometer, providing accurate and stable voltage measurement with high-resolution adjustment. The unique Low Resistance Precision instrument switch is used throughout the Precision DC Potentiometer and provides consistent contact resistance with minimum mechanical wear.

This switch was developed after several years of research into the fundamental factors affecting contact resistance. The stationary contacts are silver-clad copper bars mounted in a robust insulating frame. The brush, which is composed of several independent contact springs, is unrestricted in its movement and makes a bridge contact between adjacent bars in a symmetrical manner.

As a result, low and consistent contact resistance is achieved without high contact pressure or excessive mechanical wear. After a life test of approximately 20,000 operations, the switch was still mechanically sound and its stability had actually improved within the specified range. The overall switch resistance is approximately 0.001 Ohm and the variation of contact resistance is less than ±0.0001 ohm.

For proper installation and connection of the instrument, correct potentiometer wiring is important. The dc potentiometer diagram can be used as a reference for understanding the connections and measurement arrangement of the Precision DC Potentiometer.

FEATURES

1. Accurate measurement of potential, current, and resistance.

2. Highest quality manganin wire well-aged standards.

3. High stepwise resolution of 2 microvolt at the last range switch setting.

4. Excellent accuracy of ±0.02% to ±0.05%.

5. Impeccable craftsmanship in construction, rigorous testing, and simplicity of operation.

6. Hard silver-plated, self-cleaning switches with minimum contact resistance errors.

7. Designed for reliable performance as a precision dc potentiometer.

8. Suitable for applications based on the operating principles of a dc crompton potentiometer.

SPECIFICATION

Range of Measurement: 0 to 1.8 Volt

Range / Range Switch Setting

• 0 to 1.8 V — X1

• 0 to 0.18 V — X0.1

• Smallest reading with multiplier of 0.1 — 0.00002 Volt

• Resistance — 11 ohm per Volt

• 100 mV to 1.8 V — ±0.02% or ±1 slide wire division, whichever is greater, on all the two ranges.

• Up to 99 mV — ±0.05%

ACCESSORIES FOR PRECISION DC POTENTIOMETER

The following accessories are required with the potentiometer as support accessories to complete the measurement system. The potentiometers become a complete measurement system in conjunction with the following accessories:

1. Spot Galvanometer

2. Volt Ratio Box

3. 2 Volt Accumulator

4. Analogue Galvanometer with selector switch for protection of Spot Reflecting Galvanometer

5. Electronic Standard Cell

Frequently Asked Questions

1. What is a Precision DC Potentiometer?

A Precision DC Potentiometer is a high-accuracy instrument used for measuring potential, current, and resistance. The 55X-DCP is designed for stable and precise measurements in laboratory and calibration applications.

2. What is a DC Crompton Potentiometer used for?

A dc crompton potentiometer is used for precise measurement of DC voltage by comparing an unknown voltage with a known reference voltage. The 55X-DCP follows similar operating principles for accurate voltage measurement.

3. What is the voltage measurement range of the 55X-DCP?

The Precision DC Potentiometer Model 55X-DCP has a measurement range of 0 to 1.8 Volt, with range settings of X1 and X0.1. The smallest reading with a multiplier of 0.1 is 0.00002 Volt.

4. What accuracy does the 55X-DCP provide?

The 55X-DCP provides an accuracy of ±0.02% or ±1 slide wire division, whichever is greater, for measurements from 100 mV to 1.8 V. For measurements up to 99 mV, the accuracy is ±0.05%.

5. What accessories are required for the Precision DC Potentiometer?

The 55X-DCP can be used with accessories such as a Spot Galvanometer, Volt Ratio Box, 2 Volt Accumulator, Analogue Galvanometer, and Electronic Standard Cell to form a complete precision measurement system.