Calibration Definition and 82 Threads

I have received a pr. gauge for calibration. It's graduations are in bar and kN. The gauge is to be calibrated using kN readings and result should be given along with the uncertainty in measurements. The diameter of the piston used in the system (provided by the customer) is 5.4cm. Can anybody...

Homework Statement A constant-volume gas thermometer is cal- ibrated in dry ice (which is carbon dioxide in the solid state and has a temperature of −80◦C) and in boiling ethyl alcohol (78◦C). The two pressures are 1 atm and 1.542 atm. What value of absolute zero does the cali- bration...

I've recently been researching how to measure strain using strain gauges. I came upon the subject of shunt calibration and hit a mental roadblock. From what I understand, shunt calibration simulates a strain across a strain gauge using a comparatively large resistor placed in parallel with...

calibration curve and concentration?? The following is all of the data I have from a AAS/FES for water analysis. I need to make the calibration curves for calcium and sodium. and then I have to find the concentration. can someone please help me with this? i know that the Abs values will be one...

I have obtained an XRD pattern for Silicon, with the peaks occurring at 28.5, 47.35, 56.15, 69.3,76.4,88.05 degrees within the 2theta range. h k l d-space 1 1 1 3.1200 2 2 0 1.9100 3 1 1 1.6300 4 0 0 1.3500 3 3 1 1.2400 4 2 2 1.1000 these are the...

I am trying to create an interactive whiteboard with an IR camera (wiimote actually), IR pen, and an arbitrary surface. For simplicity I'll assume the surface is a screen. To know how an IR dot from the camera's point of view relates to a point on the screen's surface, I must calibrate it with a...

I looked this up but couldn't find sufficient information on it. What I know is that calibration curves are used to find the concentration of an unknown compound by graphing a series of measurements of a property like light absorbance from standard solutions of that compound. What I don't get is...

Hi all, Got a bit of a problem with a lab experiment at uni (I'm not sure if this is the right place to post this, mods feel free to move it if necessary!) Anyway: We're trying to get a plot of efficiency against energy for a planar germanium detector. We've got spectra for different...

Is it necessary to know the procedure of operation of a mass spectrometer in order to select the correct calibration standards? The mass spectrometer will be used to determine the isotopic composition in a gas.

Hello, I have got a HP 70950 Optical Spectrum Analyser, embedded into a HP 71450A mainframe. Can anyone supply a copy of this manual to me? If not, does anyone know the procedure to calibrate the wavelength, which is now 1.1nm shifted in the 1.3um region. I can use the offset command, but...

Hi all, I've been trying to develop this excel macro for mapping out a train track and locating kinks. It's been going well so far except that when the accelerometer is not exactly level with the ground, the acceleration due to gravity (9.8 m/s^2) is not only effective in the z-direction...

Homework Statement Hi, i have to calculate a calibration factor to change a measurement for velocity in volts from a vibration test rig into a measurement of velocity in m/s. Homework Equations I have data for velocity in volts and i am using the equation v=x'=awcos(wt) to...

i am working with making a rotameter in comsol.i want to make a calibration curve (height of float vs. flow rate). https://www.physicsforums.com/attachments/21281 https://www.physicsforums.com/attachments/21282 i failed to move the solid float through the pipe with velocity.how i can...

I'm wondering if anyone could point me to a reference that explains how commercial digital geiger counters convert from the natural counts/sec unit to units of mR or uR/hr?

Help! Calibration rig Hi guys, I'm new to engineering and currently, my school gave us a project to measure the lift, drag and moment forces acting on the aerofoil at various angle, but we need to do a calibration on the load cell which we will be using. But, how to we add weight on...

Homework Statement I have an equation with a number of variables, of which the values and their uncertainties are known. Two of these variables are measured with a ruler, h and l. The question is, will a zero error in the ruler affect the answer or the uncertainty in the answer? The same...

I am currently working on a project which involves me using a force sensor. So far I have tested the sensor statically. However, I need to calibrate it dynamically so that the output voltage can be used to determine a force in Newtons. I have done a bit of research so far and it seems that it...

'A Causality Problem For Milankovitch' is the title of this report, which challenges the insolation theory with reference to a cave in Nevada called Devils Hole. The penultimate termination of the ice age at 135 ka seems incompatible with the new data in 1992. The Devils Hole chronology was...

Hi, I'm having a lot of trouble trying to set up a process for calibrating turbine flowmeters for use in fuel rigs. Basically, I have a calibrated "master" flowmeter in series with the uncalibrated turbine flowmeter. I need a process that will give me the line of best fit across the...

Homework Statement Hi! I have been given such a task: A population of firms can assume three states: good-bad-bankrupt (default) The cumulated frequencies of default (DP) from year 1 to 10 are given. Find an appropriate transition matrix (TM) I'm given a matrix of historical cumulated...

background: I am working with an accelerometer to measure the tilt angle of a mechanical device. The accelerometer reads x, y, z values that can be made into a "gravity vector". The accelerometer can NOT be assumed to mount square with the device. The accelerometer is NOT well calibrated, so the...

I'm currently taking intermediate Lab II (Physics 414) and we're currently working on Gamma Ray Spectroscopy. We are tasked with manually calibrating a NA-I Scintillator doped with Thallium in order to determine the isotope composition of an unknown source. My partner and I have been thinking...

I would like to know why are naphthalene, acetanilide, benzoic acid, and adipic acid used in calibration of thermometers. Do those compounds have any specific property that makes them adecute for this process?

I am new to instruments. My project is to modify an existing colorimeter which presently measure several chemical compositions in water. Colorimeters as you know is a simple version of a atomic absorption spectro-photometer (as far as I understand) which uses only the visible light spectrum to...

I need to calibrate ion flow chambre,dont know exactly how. I don't know also how to relate Bq/m3 to doserate mSv/h. Are there any doserate limits,instructions suggest that there are.

Hi, I'm performing an experiment whose goal is to analyze the splitting of the green Mercury line under Zeeman's effect. To do this we use a Fabry-Perot etalon, which first has to be calibrated. This means both making sure that the two reflective mirrors are parallel, and then measuring the...

If I'm calibrating a magnet between 0.5T and -0.5T. Should I go to like 0.1, and flip the current to -0.1 then back to 0.1, onto 0.2, -0.2 etc. Or go in increments from 0T to 0.5 T, then 0T to -0.5T, after putting the magnet through a hysteris loop? I'd imagine the first way, but am wondering...

Here is an interesting [and important] paper, IMO: The Hubble Constant: A Summary of the HST Program for the Luminosity Calibration of Type Ia Supernovae by Means of Cepheids Authors: A. Sandage (1), G.A. Tammann (2), A. Saha (3), B. Reindl (2), F.D. Macchetto (4), N. Panagia (4)...

URGENT- Calibration curve question Okay, so I'm a physicist doing a chem class so I'm a little out of my depth. I've got a lab report to hand in but I'm a little stuck on the last part, working out the concentration of Se from a calibration curve. My problem is that the calibration curve is...

I was just hitting the spine of a small hardcover book against my ankle bone without looking. I my accuracy is not where I want it to be. My propriception is not as good as I'd like it to be. Not that it is under-average or anything (like I'd know the average..), but I would like to improve...

Hello All, I have a very impotant question for you. Any help is appreciated. Given is a logarithmical function: y = log2x (2 is the base) and the y value is known. I have to find out what is the x value in the fewest steps possible. It can be made by giving sample values for x and...

Hi please help I have to do a piece of coursework on sensors. I am testing a thermistor and my teacher mentioned something about calibration but I don't know what it is can someone help please. I have taken results for the resistances for every ten degrees from 0 to 150