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Post by badsha on Feb 7, 2023 8:54:03 GMT -5
How to calibrate the thin film sample by varying x and y distance? I want to use my own .8* .8 cm2 thin film sample to calibrate whose magnetization is low( around 1200 emu/cc). I am not getting symmetric M- H loop. I put the sample first in the geoometric center then I vary the x distance so that moment is minimum then I vary y distance. And i choose the y point where the moment is maximum. Can you please suggest me what's the procedure to calibrate the sample having low magnetization?
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Post by Lake Shore Cosmin on Feb 7, 2023 12:59:20 GMT -5
Hello, I guess you are referring to saddling or centering the sample and not actually calibrating the moment gain of the magnetometer. You can saddle the sample using a sample with same dimensions but larger magnetic moment, such as a piece of credit card stripe and then substitute with your low moment sample.
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Post by badsha on Feb 8, 2023 4:29:46 GMT -5
Thank you. Yesh, I am talking about saddling
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Post by badsha on Feb 8, 2023 6:09:01 GMT -5
Hi.
Could you plz tell that how should I vary the x and y knobs of VSM for this calibration?
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Post by Lake Shore Cosmin on Feb 9, 2023 14:32:24 GMT -5
For more guidance on this, see Section 4.3.3. in the 7400-S Series VSM user manual, which shows moment vs. position on all three (X-Y-Z) axes. It explains how much moment is affected by a sample being off-center.
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Post by Lake Shore Cosmin on Feb 9, 2023 14:35:35 GMT -5
Sample Saddling
The sample should be positioned at the geometric center of the pickup coils, a procedure known as "saddling." On a standard electromagnet system, the saddle point is found by finding the local extrema of the moment signal in the x, y, and z directions. Generally, the x (left to right) position should be a local minimum in the moment signal (or its absolute value, to be precise). The y (front to back) position is a local maximum, and the z (up and down) position can be either a maximum or a shallow minimum between two maxima, depending on the separation between the coils. For very weak samples, it is a good idea to saddle using a strong sample (such as a saturated nickel standard), with the same geometry as the weak sample, attached in the same manner as the weak sample to be tested.
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Post by dorothymorris on Mar 18, 2024 3:02:32 GMT -5
To address the calibration issue, ensure you have a standardized procedure for calibration, regularly calibrate equipment, and document all calibration activities to maintain accuracy and compliance. Additionally, consider implementing automated reminders or alerts for upcoming calibration deadlines to prevent lapses yt teacher. |
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Post by tasiawells5u on Mar 25, 2024 5:12:32 GMT -5
Calibration issues can arise due to factors like sensor drift, environmental changes, or improper calibration techniques. Addressing these issues may involve recalibrating instruments using certified standards techsslassh.com, implementing regular maintenance checks, and ensuring proper handling and storage conditions for equipment. Additionally, verifying calibration procedures against industry standards can help maintain accuracy and reliability in measurements. |
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kraft
New Member
Posts: 1
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Post by kraft on Apr 19, 2024 13:21:05 GMT -5
Ah, calibration can be tricky, especially with low magnetization samples. Have you considered adjusting the field strength or the orientation of the sample? As for weight loss Wayne PA, there are plenty of local fitness centers and nutritionists who can guide you on a journey towards healthier living. |
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