In industrial instrumentation, accuracy is the measurement tolerance, or transmission of the instrument and defines the limits of the errors made when the instrument is used in normal operating conditions.

Introduction:
In order to ensure accuracy of an instrument, it is necessary to consider both conformity and precision. Both of these factors play a significant role in determining the reliability and correctness of the measurements taken by the instrument.

Conformity:
Conformity refers to the ability of an instrument to provide measurements that are in agreement with a recognized standard or reference value. It ensures that the instrument is calibrated and adjusted properly to produce accurate results. Conformity is important because it establishes the reliability and trustworthiness of the instrument.

Precision:
Precision, on the other hand, refers to the degree of consistency or reproducibility of the measurements obtained by the instrument. It measures the ability of the instrument to provide consistent results when repeated measurements are taken under the same conditions. Precision is crucial because it indicates the level of random errors present in the measurements.

Importance of Both:
Conformity and precision are interdependent and both are essential for achieving accuracy in measurements. Here's why both factors are necessary:

1. Conformity:
- Conformity ensures that the instrument is calibrated and adjusted correctly, which helps in minimizing systematic errors.
- It establishes the traceability of the measurements to a recognized standard, which enhances the credibility of the instrument.
- Conformity ensures that the instrument is operating within acceptable limits and meets the required specifications.

2. Precision:
- Precision helps in quantifying the random errors associated with the measurements.
- It provides an indication of the repeatability and reliability of the instrument.
- Precision allows for the detection of small variations or changes in the measured quantities.

Conclusion:
In conclusion, both conformity and precision are necessary for ensuring the accuracy of an instrument. While conformity establishes the reliability and trustworthiness of the instrument by conforming to a recognized standard, precision quantifies the consistency and repeatability of the measurements. Therefore, in order to obtain accurate results, it is important to consider both conformity and precision in the design, calibration, and use of the instrument.