how to calculate error, tolerence & accuracy in calibrating ...

TOLERANCE - Usually provide as a percentage of the expected value. It can be plus or minus. Tolerance = (Measured Value - Expected Value)/Expected Value. In the above case the Tolerance is (75.1-75.0) / 75 = 0.13%. Tolerance is measurement of accuracy. Typically it is defined or specificed by the manufacturer of the device in question. 12 years ago

Appendix E Construction Tolerances

shown on the drawings) plus or minus 3/8 inch for #8 or smaller bars and plus or minus 1/2 inch for bars larger than #8 bars. e. Lap and splice location—Plus or minus 1 inch. Minimum 12-inch splice length. f. Spacing—Minimum distance between bars plus or minus 1/4 inch. In uniform spacing (from theoretical location), plus or minus 2 inches.


asphalt content is 5.0% by weight, then the flow rate for the test run must be: 200 T/hr x 0.05 = 10 T/hr. For some plant control systems, it may be necessary to convert this to gallons per period. 6.4 Record the calibration setting of the meter adjuster.

Evaluating Calibration Tolerances Can Save You Trouble • JM ...

Also, tolerances should be specified in the units measured for the calibration. All test equipment readouts are accurate only to a certain level of uncertainty, or tolerance. The best test equipment has LOW uncertainties, but NO test equipment can give you a 100% correct output or input reading – there is a tolerance for all equipment.

ATT-17/96, PLANT CALIBRATION Part I, Drum Mix Asphalt Plants 1.0 S…

What is plant calibration?

ATT-17/96, PLANT CALIBRATION Part I, Drum Mix Asphalt Plants ...

plant calibration; and c) completing the Drum Plan Calibration Certificate (for each plant calibration). The aggregate and asphalt calibration data sheets (MAT 6-38 and 39) must be completed by the quality control technologist. When requested, copies of the completed forms should be submitted to the Department's representative.

Calibration Out of Tolerance: What does it mean and what to ...

Dec 16, 2016 · Calibration out of tolerance – ready to hit the Panic button? In this post we are talking about calibration being “Out of Tolerance” (OoT). When you calibrate something and the result is a “Fail”, then it is an Out of Tolerance-situation. But it’s not all that simple - there is more to it and more things to be considere d.


403.03.07 Transverse joints in all asphalt courses. Deviations do not exceed tolerances described in Subsection 403.03.11 from a 10-foot straight edge after joint is complete and rolled. 403.03.11 Surfaces of finished courses; asphalt plant-mixed pave-ments. Finished surfaces of base course and binder course shall not deviate more than ± 1/4

Tolerance Chart (Maximum Permissible Error)

Tolerance Chart Tolerance Chart Tolerance Chart (Maximum Permissible Error) 800-249-5554 * E0 is a theoretical tolerance that is 50% of OIML R 111 Class E1 ** NIST 105-1 Class F tolerances are rounded to two significant figures

Double Plus or Minus Tolerances | Engineers Edge Engineering ...

Sep 03, 2013 · Some of the metric drawings use a double minus (-.027mm,-.034mm) tolerance or a double plus (+.027mm,+.034mm) tolerance. Based on my experience this would be interpreted as the nominal diemenision (theoretical desired size) with a unilateral tolerance of -.027mm, -.034mm.

how to calibrate concrete batching plant – Concrete mixing ...

Jun 28, 2017 · 4 Calibration of zero setting and peeling device accuracy. 5 Bias load test. 6 Weighing test. According to the order from small to large from zero up to the maximum plus weight scale, in the same way unload weight to zero. 7 Discrimination test.


ASPHALT PAVING MHOG SWATH 32 12 16-4 04/2015 2. Surface Course: Plus 1/4 inch, no minus. B. Pavement Surface Smoothness: Compact each course to produce a surface smoothness within the following tolerances as determined by using a 10-foot straightedge applied transversely or longitudinally to paved areas: 1. Base Course: 1/4 inch. 2.


An allowable tolerance of plus or minus 0.2 percent of the emulsion design target rate shall be maintained at all times. The emulsion target will be documented by the Department on a Form #43 for each design that is accepted.


table 920-7 tolerance from quality control test results. for average of five samples. sieve size. all plants tolerance percentage (plus or minus) no. 8 5.5. no. 200 1.6. asphalt 0.55. table 920-8 reduction per lot due to nonconformance of qualtiy assurance testing as compared to the quality control testing. deviation of average of five


total mix weight. The target asphalt content is based on design and field Marshall mix test results. The target asphalt content may be adjusted to improve mix properties as measured by field Marshall tests. Maintain the actual asphalt content in the mix within plus or minus 0.3 percent of the target asphalt content.

Asphalt Roadway VT Report

Sep 07, 2006 · NOTE: It is very important to have good communication between the Asphalt Plant Inspector and the Asphalt Road Inspector. Reports should be delivered to the verification technician at the plant no later Temp. Gallons / Liters - Record the amount of liquid in the tank at the end of production by using the certified calibration chart.


Asphalt Anti-Strip Additive Metering Device: When asphalt anti-strip additive is added into the asphalt at the HMAC mixing plant, provide a means to weigh or meter the additive at a specified rate that has an accuracy of plus or minus 0.5 percent. Thermometers: Provide the following:


The asphalt mixing plant shall be capable of producing a uniform material, have adequate capacity, and be maintained in good mechanical condition. Defective parts shall be replaced or repaired immediately if they adversely affect the proper functioning of the plant or plant units, or adversely affect the quality of the hot asphalt plant mix.

Daily Paving Worksheets

from an asphalt paving project. Most forms shown are included in the “Daily Paving” Excel workbook. The forms represent the typical paperwork a QA lab tester will be responsible for each day. The Excel workbook is available from the local District Materials Coordinator. It is periodically updated/corrections made. Always verify you have the ...

10.4 Bitumen Extraction Tests 10.4.1 General requirements

and warm in a 110°C plus or minus 5°C oven only until it can be handled or separated. Split or quarter the material until the required mass of the sample is obtained. b) The size of the test sample shall be governed by the nominal maximum size of the aggregate in the mix. The mass of the sample must comply with the values given in Table 10.4.1

HANOVER GUIDELINE SPECIFICATION Paving and Surfacing Asphalt ...

The Asphalt cement shall conform to Type 3 asphalt ASTM Designation D-312 with a penetration at 77 Degrees F, 100 G, 5 sec of minimum 15mm and maximum of 35mm. The blocks shall have a permissible plus or minus tolerance of 1/8” in any direction. The average absorption of a set of four blocks shall not be more than .85% Physical Characteristics:

Chapter 4: Construction Details, Section 39: Asphalt Concrete ...

Asphalt rubber is specified to include 18percent to 22 percent crumb rubber modifier (CRM) by total mass of the asphalt rubber blend. The CRM must also include 25 percent, plus or minus 2 percent, high natural rubber content scrap rubber by mass of the CRM that may come from scrap tires or other sources.

32 12 16 Asphalt Paving - Illinois State

b. Finished grade top or topsoil tolerance shall be plus or minus one inch. c. Finished grade to be level, firm and sufficient to prevent areas from settling when irrigation is applied. d. Cultivate mechanically inaccessible areas by hand. Rake until surface is smooth. e. Grade to perimeter contours to allow for proper drainage. 2.

Material Plant Quality Program-July 2008

Jul 01, 2008 · Refer to Section 39-1.02D, “Asphalt Rubber Binder,” of the Standard Specifications for ingredient proportioning ratios and operational tolerances for each ratio. Refer to Section 39-1.08C, “Asphalt Rubber Binder,” of the Standard Specifications for the asphalt binder, asphalt modifier, and ARB temperature limits and ARB


• Tolerances for 424 mixes: - Plus or minus 4 % for the #4 through #100 {2.36 mm through 150 µm} sieve requirements. - Plus or minus 2.0 % for the #200 {75 µm} sieve requirement. The initial setting of the controls for all materials shall be those amounts shown on the job mix formula.


consideration, and 5 plus or minus 1-1/2 percent for concrete pavements located in regions where frost action is not a factor and air entrainment is used primarily to improve the workability and placeability of freshly mixed concrete. Air content will be controlled


B. Asphalt Mixing Plant All plants, used by the Contractor, shall be designed, coordinated and operated to produce a mix uniformly within the job-mix tolerances as listed herein and in accordance with AASHTO M-156. The plant may be either a weightbatch type or a volumetric proportioning, continuous/drum


Sample the asphalt mixture at the plant in accordance with FM 1-T 168. The percent asphalt binder content of the mixture will be determined in accordance with FM 5-563 (ignition oven). The gradation of the extracted mixture will be determined in accordance with FM 1-T 030. All test results will be shown to the nearest 0.01.

Bitumen Extraction Test - Binder Content - Apparatus ...

Oct 20, 2018 · An oven dried filter ring is taken and its initial weight is recorded. The temperature of oven for drying the ring is kept at 110 plus minus 5 0 The edge of the bowl is covered with this filter ring. The bowl is then covered with a steel cover and is clamped tightly before placing in the apparatus.

OSHA Technical Manual (OTM) | Section III: Chapter 5 - Noise ...

Aug 15, 2013 · Adjusts the instrument calibration when the tolerance is within the manufacturer's published limits (e.g., ±0.2 to 1dB) but rejects the equipment if the calibration reading is outside the limits (e.g., ±1 dB or more). Prevents use of equipment that is outside its periodic calibration due date or fails pre-use calibration.