What do you mean by zero error of a screwgauge ? How is it accounted f

1.	What do you mean by zero error of a screwgauge ? How is it accounted for ?
Answer» Zero error :When the fixed stud A and movable stud B are brought in contact without applying any under pressure , and the zero of the circular scale does not coincide with the refference line, there is a zero error. Based on the location of zero of the circular scale with respect to reference line, zero errors are further as positive or negative zero error, so while doing the calculations, in order to minimise the errors caused by the instrumental error, the positive or negative error is calculated by counting the number of divisions ahead or backward from the reference line and they are added or subtracted from the actual reading.

What do you mean by zero error of a screwgauge ? How is it accounted for ?

Answer»

Zero error :When the fixed stud A and movable stud B are brought in contact without applying any under pressure , and the zero of the circular scale does not coincide with the refference line, there is a zero error.

Based on the location of zero of the circular scale with respect to reference line, zero errors are further as positive or negative zero error, so while doing the calculations, in order to minimise the errors caused by the instrumental error, the positive or negative error is calculated by counting the number of divisions ahead or backward from the reference line and they are added or subtracted from the actual reading.

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