Certificato Ukas Viscosimetri a Capillare
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CERTIFICATE OF CALIBRATION DATE OF ISSUE 18 November 2001 SERIAL NUMBER 298968 |
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POULTEN SELFE & LEE LTD
WICKFORD ....................................................APPROVED SIGNATORY Telephone + 44 1268 733324 Fax + 44 1268 560049 ...............................................................................................A.DGosLing |
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Supplied to: EN.CO S.R.L. Via filande 13- 30038 Spinea (VE), Italy Type: UBBELOHDE Marked: PSL ASTM-IP 1C Viscosimeter No: 3447 This viscosimeter has been calibrated aqgains traceable standards held at the Laboratory and the costant C was found to be: 0.02967 (mm2/s)/s This calibration was carried out at a temperature of 25°C with the capillary tube vertical in accordance with the general procedure given in ISO3104, ISO3105, BS188, IP Method 71 and ASTM Method D445. The kinematic viscosity v (mm2/s) of a liquid may be calculated from a mean measured flow time t (seconds) using the formula V = Ct The above formula applies when the flow time in this viscosimeter is not less than 200 seconds. UNITS: The SI unity of viscosity is the metre squared per second (m2/s). The reccomended sub-multiple is the mm2/s, where 1mm2/s 1 cSt (Centistokes) = 10-6m2/s. The reported expanded uncertainty is based on a standard uncertainty multiplied by a coverage factor k=2 providing a level of confidence of approximately 95%. The uncertainty evaluation has been carried out in accordance with UKAS requirements. Batch No 14813 1643/1.1 |
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This certificate Is issued in accordance with the requirements of the United Kingdom Accreditation Service as specified in the UKAS Accreditation Standard and UKAS Regulations. it provides traceability of measurement to recognised national standards, and to the units of measurement realised at the National Physicoal Laboratory or other recognised national standards Iaboratories.This certificate may not be reproduoed other than in fuIi, except with the prior written approvai of the issuing Iaboratory. |