Calibration Master Standards at Vaiseshika Lab
Tinsley Stabaumatic Potentiometer
This instrument is manufactured by H. Tinsley & Co. Ltd., Croyodon, UK. The instrument is having four ranges for measuring voltages from 2 volt in steps of 1 microvolt on the highest range to 2 millivolt in steps of 1 nanovolt on the lowest range, thereby providing an accuracy of 0.001% to the measuring system. The resistance bridge is having a measurement range from 0.01 ohm to 21 Megohm having limit of error of 0.005% on the lowest range.
The Potentiometer employs two standard cells and one current controller duly assisted by Galvanometer Amplifier to provide very accurate null detection and precision measurement of resistance/voltage values.
The instrument is calibrated against the calibration standards maintained at the Electronics Regional Test Laboratory, Government of India, New Delhi having traceability to the National Physical Laboratory, New Delhi.
Resistance Range |
0 to 10 Megohm |
Accuracy : ± 0.005% |
Voltage |
0 to 2 Volts |
Accuracy : ± 0.003% |
Traceability |
National Physical Laboratory, New Delhi. |
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Tinsley Precision Non-Inductive Standard Resistors
Tinsley Standard Resistors ranging from 0.0001 ohm to 10 megohm have been maintained in our laboratory to support the calibration sanctity. The 0.0001 ohm resistance is a motorized resistance and is having an accuracy of 0.05%. The other standard resistors are Wilkins four terminal standard resistors designed by F.J. Wilkins of the National Physical Laboratory, Teddington, Middlesex, England and are accompanied by NAMAS Calibration Standards.
Resistance Range |
0.0001 Ohm to 10 Mohm |
Calibrated Accuracy |
± 0.002% to 1% |
Traceability |
National Physical Laboratory, New Delhi. |
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Power Supplies from Applied Electronics Limited (APLAB), Thane.
Voltage Range |
0 to 1000 Volt, Calibrated Accuracy : ± 5% |
Voltage Range |
0 to 5000 Volt, Calibrated Accuracy : ± 0.1% |
Traceability |
National Physical Laboratory, New Delhi. |
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8 ½ Digits Digital Multimeter AGILENT, from Hewlett Packard, USA.
Voltage Range |
0 to 1000 Volt, Calibrated Accuracy : 9 ppm to 10 ppm |
Current Range |
100nA to 1A, Calibrated Accuracy : 14 ppm |
| Resistance Range |
10W to1GW, Calibrated Accuracy : 2.2 ppm |
Traceability |
National Physical Laboratory, New Delhi. |
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Dry Block Temperature Calibrator, from Dr. Siebert & Kuhn GmbH & Co., Kaufungen, Germany.
Temperature Range |
Ambient Temperature to 600 Deg.C. |
Calibrated Accuracy |
± 0.5 Deg. C. |
Traceability |
National Physical Laboratory, New Delhi. |
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Universal Calibrating Machine with Proving Ring and Ring Force Gauges, from Morehouse Instrument Company, York, Pennsylvania, USA.
Range |
0 to 5000 KGF |
Calibrated Accuracy |
± 0.025% |
Traceability |
National Institute of Standards & Technology, Gaithersburg, Washington, USA |
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Morehouse Calibration Grade Load Cells with Indicator
Morehouse Universal Calibration grade load cells from 500 LBF to 100,000 LBF.
ASTM-E74 Class AA lower limit around 10% of range in compression and tension when calibrated in Mv/V or combined with the morehouse load cell meter model 4215 or comparable meter.
ASTM-E74 Class A lower Limit around 2% of range in compression and tension.
Uncertainties of around 0.005% of capacity in compression and tension when combined with the morehouse load cell meter model 4215. |
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DMM 4 ¾ Digits Multimeter, from RISHAB
Parameter |
Range |
Accuracy |
DC Voltage |
200 µV to 1000 V |
± 0.05% + 3 Digits |
AC Voltage |
100 µV to 1000 V |
± 0.3% + 30 Digits |
DC/AC Current |
300 microA to 10 A |
± 0.2% + 30 Digits |
Resistance |
300 Ohm to 30 Mohm |
± 0.1% + 6 Digits |
Traceability |
National Physical Laboratory, |
New Delhi. |
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Digital Weighing Balance
Capacity |
300 grams |
Resolution |
0.001 grams |
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