- What is ppm in time?
- What is PPM error?
- What does ppm mean in surveying?
- What is ppm in accuracy?
- How is EDM used in surveying?
- What are the types of EDM instruments?
- What is 1 ppm equal to?
- What does a total station do?
- What is RMS in surveying?
- How accurate is a total station?
- What is the least count of total station?
- What is 1 ppm in grams?
- What is the basic principle of EDM?
- What is RMS accuracy?
- What are the disadvantages of Total Station?
- What should my PPM be?
- What does ppm mean in frequency?
- How do you measure ppm?
- What is the difference between EDM and total station?
- What is RMS in statistics?
- What does root MSE mean?

## What is ppm in time?

Clock accuracy in ppm.

Crystal Clock accuracy is defined in terms of ppm or parts per million and it gives a convenient way of comparing accuracies of different crystal specifications.

Note: ppm parts per million.

ppb parts per billion..

## What is PPM error?

PPM (Parts per million) is a measurement used by many customers to measure quality performance. Definition: One PPM means one (defect or event) in a million or 1/1,000,000. In the past a good supplier would have a defect rate of less than 1%, (10,000 PPM).

## What does ppm mean in surveying?

parts per millionMore accurate and less time consuming than traditional methods, GPS surveying encounters fewer distractions that can delay a development project, such as poor weather. The acronym PPM, standing for parts per million, expresses the accuracy of a relative orthometric height used in GPS-aided ground leveling.

## What is ppm in accuracy?

“Percent,” “parts per million (ppm),” and “parts per billion (ppb)” are terms used in industry and in calibration to describe accuracy or uncertainty specifications in measurement instruments and calibrators. Instruments used for precise measurements all have uncertainty associated with the measurements they provide.

## How is EDM used in surveying?

Electronic distance measurement (EDM) is a method of determining the length between two points using electromagnetic waves. … EDM instruments are highly reliable and convenient pieces of surveying equipment and can be used to measure distances of up to 100 kilometers.

## What are the types of EDM instruments?

The electronic distance measuring equipment is differentiated into three types as, microwave instrument, infra red equipment and light wave equipment.

## What is 1 ppm equal to?

1 milligramOne ppm is equivalent to 1 milligram of something per liter of water (mg/l) or 1 milligram of something per kilogram soil (mg/kg).

## What does a total station do?

A total station is an optical instrument commonly used in construction, surveying and civil engineering. It is useful for measuring horizontal angles, vertical angles and distance — it does this by analyzing the slope between itself and a specific point.

## What is RMS in surveying?

1. INTRODUCTION. The aim of this paper is to clarify some confusing nomenclature of some statistical terms frequently used in the surveying literature. These terms are Standard Deviation and Variance, Root Mean Square (RMS), Mean Square Error and Standard Error.

## How accurate is a total station?

A typical total station can measure distances up to 1,500 meters (4,900 ft) with an accuracy of about 1.5 millimeters (0.059 in) ± 2 parts per million.

## What is the least count of total station?

The World of CiviLtheodolite: least count is 20″Prismatic compass: least count is 30’least count of levelling staff is 5mm.dumpy level: least count 5mm as it is based on staff reading thats why least count is 5mm.Total station : Least count for total station for angle is 1” & Distance is 1mm.

## What is 1 ppm in grams?

PPM is a term used in chemistry to denote a very, very low concentration of a solution. One gram in 1000 ml is 1000 ppm and one thousandth of a gram (0.001g) in 1000 ml is one ppm. One thousanth of a gram is one milligram and 1000 ml is one liter, so that 1 ppm = 1 mg per liter = mg/Liter.

## What is the basic principle of EDM?

Principles of EDM Electrical Discharge Machining (EDM) is a controlled metal-removal process that is used to remove metal by means of electric spark erosion. In this process an electric spark is used as the cutting tool to cut (erode) the workpiece to produce the finished part to the desired shape.

## What is RMS accuracy?

The term accuracy is used to express the degree of closeness of a measurement, or the obtained solution, to the true value. For the 1-D case, for example, measuring the length of a line between two points, the accuracy is expressed by the so-called root mean square (rms). …

## What are the disadvantages of Total Station?

Disadvantages Of Total Station:The instrument is costlier than other conventional surveying instruments.It might be troublesome for the surveyor to investigate and check the work when surveying.Working with total station is not so easy, as more skilled surveyors are required to conduct a total station survey.More items…

## What should my PPM be?

Knowing your PPM helps you avoid possible burning by letting you know when to adjust the amount of nutrient minerals you add to your water. Cannabis enjoys 500-600 ppm after cloning, 800-900 ppm when vegetating, and 1000-1100 ppm when flowering.

## What does ppm mean in frequency?

parts per millionErrors Found. Close. Oscillators and other frequency control devices specify their frequency variation in units of parts per million (ppm).

## How do you measure ppm?

Question 1.Write an equation representing the ppm concentration: ppm = mass solute (mg) ÷ volume solution (L)Extract the data from the question: mass solute (NaCl) = 0.0045 g. … Convert the mass in grams to a mass in milligrams: mass NaCl = 0.0045 g = 0.0045 g × 1000 mg/g = 4.5 mg.More items…

## What is the difference between EDM and total station?

Total station on the other hand, is a multipurpose surveying instrument based on electronic distance measurement (EDM). They can measure distance, angles, elevations with a high level of precision. … Total station on the other hand can measure different data rather than just angles.

## What is RMS in statistics?

Root Mean Square, RMS is defined as the square root of mean square where mean square is the arithmetic mean of the squares of numbers. RMS is also termed as the quadratic mean.

## What does root MSE mean?

Root mean squared error (RMSE) is the square root of the mean of the square of all of the error. … RMSE is a good measure of accuracy, but only to compare prediction errors of different models or model configurations for a particular variable and not between variables, as it is scale-dependent.