13.311a 13.311b less-testing Dry gas meters, rated capacity 600 ft3/hr or with Displacement type meters for liquids which can be calibrated with water at rates of flow not exceeding 300 gpm-testing at one to five rates of flow and reporting. 13.311z Special measurements not covered by this schedule. Item 213.312 Flowmeters. Description 13.312a 13.312b 13.312c 13.312d Flow meters, self-contained and direct reading; for gases, capacities not over 75 cfm; for liquids, capacities not over 300 gpm-calibration at not more than five rates of flow and reporting. Orifices, flow nozzles, laminar flow meters, and other differential head meters for use in pipes up to and including 2-in. pipe; calibration with water or air at a number of flow rates sufficient to develop a performance curve. Additional fee for meter in pipes larger than those included in item 213.312b-for each 1-in. increment of size over 2 in. inter Meters listed in item 213.312b, when two or more are used changeably in the same mounting-for each meter or orifice plate after the first. 13.312z Special measurements not covered by this schedule. 213.313 Water-current meters. Item Description 13.313a 3.313b 3.313c Rating of Price, Pigmy, and Hoff types at not over eight velocities, and reporting results in equation form. Rating of Hoff type at 10 or 11 velocities and reporting results for each propeller. Ekman type, for each propeller submitted therewith; rating at not over eight velocities and reporting results in equation form. 213.313d All types, for each velocity in excess of the number covered by items 213.313a to 213.313c above. 213.313z Special measurements not covered by this schedule. Item 213.331 Air-speed instruments. Description 213.331a Air-speed indicators-calibration of cup, vane, and thermal type anemometers, pitot-static tubes, and similar devices at wind speeds within the range 2 to 90 mph or (optional) 5 to 150 mph. 213.331z Special measurements not covered by this schedule. Railroad Track Scales 404.000 General. ADMIN (a) Direct inquiries to: Office of Weights and Measures, A738, National Bureau of Standards, Washington, DC 20234. Telephone: 301-921-2401. (b) A program for maintaining railroad scale accuracy is a part of the responsibility of the NBS under its statutory authority. Set out below is a list of services rendered by NBS under its railroad track scale testing program. NBS reserves the right to adjust the charges made for test car calibrations and commerical scale tests at the end of each fiscal year, if necessary, based on a cost evaluation of the program for the preceding year. In addition to the services listed below, NBS tests 17 master track scales for which it makes no charge. In return for the testing and adjusting of the master scales by NBS at no charge, the railroads agree to move the NBS scale test cars at no charge, provided the movement is made on the basis of an itinerary approved by NBS and the Association of American Railroads. Item 404.001 404.002 Description Testing of any commercial track scale, railroad or industry owned. Calibration and adjustment of railroad-owned scale test cars on the NBS-owned master scale at Clearing, Illinois. .003 of railroad-owned scale test Field calibration and adjustment Fees for the regular services described in these schedules are isted in Part 8 of this publication. Fees for z items and other services ave not been fixed and charges will be made for actual costs incurred. pon request, estimates will be furnished for specific tasks which should rovide a close approximation of actual cost. 221.111 Laboratory thermometers. Direct inquiries to, and mark shipments for the attention of: emperature Section, PHYS - A241, National Bureau of Standards, Washington, C 20234. Telephone: 301-921-2087. Only thermometers ccepted for test. Item 21.111a Testing at points from 0 to 100 °C, inclusive, or from 32 to 212 °F, inclusive, for each point tested. 21.111b Testing at points from 101 to 300 °C, inclusive, or from 213 600 F, inclusive, for each point tested. to 21.111c Testing at points from 301 to 500 °C, inclusive, or from 601 950 F, inclusive, for each point tested. to 21.111d Testing at points from -1 to -110 °C, inclusive, or from 31 to -166 °F, inclusive, for each point tested. 21.111e Testing in liquid air, oxygen, or liquid nitrogen (-183 to 21.111f 21.111g Calorimeter thermometers. Beckman thermometers, with 5° or 6° scale, testing at 0.5° intervals by comparison with precision standards. 21.111h When instruments submitted are found to be unsuitable for test or unreliable a charge will be made to cover the cost of the work done. Minimum fee. 21.11li 21.111z mercury Preliminary examination for foreign material in the Special measurements not covered by this schedule. dicators. : (a) Direct inquiries to, and mark shipments for the attention Temperature Section, PHYS B228, National Bureau of Standards, shington, DC 20234. Telephone: 301-921-2069. (b) Only the bare wires are required in order to perform the ermocouple calibrations in this schedule. It is preferable not to send sulating and protecting tubes as the rate of breakage of these in ipment is high. If the thermocouple is furnished mounted (as in a otection-tube assembly) a charge of $5 will be made for dismantling the unting and the various parts will be returned to the sender without reasmbling them. (c) lead wire. (d) Thermocouple length requirements listed below are exclusive All thermocouple calibration data furnished in reports on the basis of a reference junction temperature of 0 °C or 32 °F. will (e) The calibration or test of an article will not be undertaken , in our opinion, the article will not yield the specified accuracy or if possesses such unusual characteristics as to prevent the carrying out of e calibration or test at a reasonable cost. Only unused base-metal ermocouples and thermocouple materials will be accepted for test. 1.112a High-temperature thermocouples and thermocouple materials. Minimum length 24 in. Corresponding values of emf and temperature at 4 to 15 points in the range 0 to 1450 °C (32 to 2650 °F). 1.112b The uncertainties in the values of temperature corresponding to the values of emf reported for platinum versus platinum-rhodium thermocouples are estimated not to exceed 0.5 degree in the range 0 to 1100 °C and increase to not more than 2 degrees at 1450 °C. Results for platinum versus platinum-10 percent rhodium thermocouples are given at 1-degree intervals over the entire range 0 to 1450 °C. The uncertainties in the values of temperature corresponding to the values of emf reported for base-metal thermocouples are estimated not to exceed 1 °C. Base-metal thermocouples are not tested above 1100 °C (2000 °F). Thermocouple materials are tested against platinum thermoelectric standards maintained by the Bureau. High-temperature thermocouples and thermocouple materials. Calibration as per item 221.112a at less than four points, per point. |