# The correct way to read an analog gage is???

E

#### elbee

The correct way to read the gage is???

Hello everyone

Say that I have a part with a feature that is supposed to measure 0.111 +/- .001 according to the drawing.

The gage I am using to measure this has an accuracy of 0.0000

Would a reading of .1121 be acceptable? Would .1126? The argument here at work is (Eng.) the gage is capable of measuring to .0000 so we SHOULD take advantage of that and use tighter measurment. The other side (QA) says that although the gage is capable, the feature is only designed to .000 so nothing past the third decimal place should matter.

Is there any guidance out there on this?

Thanks

D

#### Don Winton

elbee,

Welcome to the Cove.

I may be mistaken in this. The implied purpose of measuring to a significant digit in excess of the specification is to determine exactly what you are asking. IMHO, if the specification is 0.111 +/- 0.001, then 0.1121 is NONCONFORMING. To mirror Marc’s suggestion, it is more important to meet the intent of the specification. Do not become caught up in the ‘goal=post’ method of thinking.

The other side (QA) says that although the gage is capable, the feature is only designed to 0.000 so nothing past the third decimal place should matter.
I disagree. Ask your phone company when one minute equals one minute. Perhaps the QA department is more concerned with meeting the letter of the specification rather than the intent of the specification. Just a thought.

Regards,
Don

[This message has been edited by Don Winton (edited 01-09-99).]

#### ljreimer

##### Registered
non conforming decisions

IF the tolerance of the device is 0.111 ±0.001 then 0.112 would be acceptable, to take advantage of the measuring device that has an accuracy of ±0.0001 if that is really the accuracy, many gages have resolutions of ±0.0001 but the resolution of the gage does not always support an accuacy equal to resolution.

Lookup the accuracy of the device to verify that is will produce an accuracy of ±0.0001. An device of this accuracy will be subject to temperature conditions at the time of measurement due to change of mass.

when the readings and the tolerances of the device are close to pass/fail requirments, review the data history on this device should help

Correct Calibration Method for Dial Depth Gage General Measurement Device and Calibration Topics 6
Is using ANSI/ASQ Z1.4-2008 the correct sampling plan to determine Pass/Fail of Apparel measurements? AQL - Acceptable Quality Level 4
AS9100 - 7.3 - Are these black and white questions with specific correct answers AS9100, IAQG, NADCAP and Aerospace related Standards and Requirements 1
Correct way to certify hydrostatic testing when it is not 100% (and Sample Size) Various Other Specifications, Standards, and related Requirements 6
What is the correct way to refer to NIST? Calibration Frequency (Interval) 4
Correct MSA study for an automated camera system which makes attribute inspection Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 1
NANDO codes of products - These are not the GMDN codes, correct? EU Medical Device Regulations 4
The correct way of doing a 2 Sample T test Reliability Analysis - Predictions, Testing and Standards 7
PED 2014/68/EU - Is this Traceability audit finding correct? Other ISO and International Standards and European Regulations 4
Assigning the Correct Procedures Applicable to Job Titles General Auditing Discussions 15
How important is using the "correct" GMDN? Other Medical Device Regulations World-Wide 13
Specifications Aerospace - Who is responsible for providing the correct specification(s) AS9100, IAQG, NADCAP and Aerospace related Standards and Requirements 14
OEM Changing the name of the manufacturer - length of process? Is 1-3 months correct? Other Medical Device Regulations World-Wide 0
How long should I have to correct an audit finding? VDA Standards - Germany's Automotive Standards 7
SPC for Dummies - The correct meaning of all the graphs Statistical Analysis Tools, Techniques and SPC 3
UDI Label Verification - How do we ensure the barcode is correct and prove it? 21 CFR Part 820 - US FDA Quality System Regulations (QSR) 4
N Correct reading for analog pressure gauge ISO 17025 related Discussions 2
J How to measure process quality? Is DPPM the correct metric? Capability, Accuracy and Stability - Processes, Machines, etc. 5
P The correct way to do a Linearity and Stability Study on a Critical Dimension Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 8
L Choosing the correct Distribution for Acceptance Sampling Inspection, Prints (Drawings), Testing, Sampling and Related Topics 19
Safety Shoes & Temporary Workers - Is it correct to reuse again or not? Occupational Health & Safety Management Standards 11
S Definition MTBF and MCBF Correct Definitions Definitions, Acronyms, Abbreviations and Interpretations Listed Alphabetically 5
T What is the correct UMDNS Code for Tracheostomy Tube? Other Medical Device Regulations World-Wide 2
E Correct Statistical Test comparing 2 Groups Statistical Analysis Tools, Techniques and SPC 14
What is the easiest way to verify we have the correct customer supplied materials? Misc. Quality Assurance and Business Systems Related Topics 5
D The correct way to analyze Skewed Data using Minitab Using Minitab Software 3
C Rolling the correct M8 1.25 Pin Thread Manufacturing and Related Processes 2
E Database search is correct to capture medical device ISO 13485:2016 - Medical Device Quality Management Systems 2
S Choosing the correct Elisa Test Food Safety - ISO 22000, HACCP (21 CFR 120) 1
TS 16949 - Which definition of Automotive is correct? IATF 16949 - Automotive Quality Systems Standard 3
L Correct Sample Size for Attribute Gage R&R (Good / Bad parts) Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 12
R Correct Cable Ports After Work and Weekend Discussion Topics 2
Is it gramatically correct to say Singapore people or Singaporeans ? Coffee Break and Water Cooler Discussions 12
H Determining the Correct Sample Size when AQL points to two Sample Sizes AQL - Acceptable Quality Level 7
J How IAQG plans to ensure that correct PEAR level determination is done by Auditors? AS9100, IAQG, NADCAP and Aerospace related Standards and Requirements 8
K AS9102 Form 3 for Assemblies - Verification that the Assembly is Correct AS9100, IAQG, NADCAP and Aerospace related Standards and Requirements 3
J MSA Emergency - PV%=100（PV/TOL）in American? And that is correct? Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 13
F Can you tell me if this table is correct? Gage R&R Problems Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 12
Is the following flow for Training Needs Analysis correct? Training - Internal, External, Online and Distance Learning 6
M Calculating Cp and Cpk - Is my calculation correct? Capability, Accuracy and Stability - Processes, Machines, etc. 7
J Are my Cpk and Cp Calculations Correct? Capability, Accuracy and Stability - Processes, Machines, etc. 4
What is the correct Working Standard for Digital Micrometer? General Measurement Device and Calibration Topics 21
Correct use of NPT (National Pipe Thread) Thread Gages General Measurement Device and Calibration Topics 15
R First Pass Yield - Am I doing correct the First Pass Yield Metric Quality Tools, Improvement and Analysis 2
C Correct Tool for Gage R&R - Assay Dilutions Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 2
How to Correct Bad Employee Performance-Attendance and/or Tardiness Quality Manager and Management Related Issues 84
R How to determine the correct Sample Frequency for SPC Features Statistical Analysis Tools, Techniques and SPC 66
Q Latest ISO 9001:2008 Rev. E - Correct? ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 5
The CORRECT steps to implement an SPC chart Imported Legacy Blogs 16
E Orthographic Projection - Which view is correct? Coffee Break and Water Cooler Discussions 4