Calibration of Glassware and Liquid in Glass Thermometers

Marc

Fully vaccinated are you?
Staff member
Admin
#1
--> Date: Fri, 29 Jan 1999 20:
-->
--> David S Smith wrote:
-->
--> Hi Marc, I enjoyed reading your comments on several calibration
--> issues. I would like any information concerning verifying,
--> calibrating, whatever glassware; for instance a saccharometer,
--> burets. I have been trying to keep checks using weight
--> comparison,(1grm = 1ml distilled water), but this is difficult w/
--> the 15ml Sacc. Any suggestions.
-->
--> Thanks,
--> David Smith

Dave:

I really don't have any experience with glassware. We'll see if anyone here on the forum has any expddrience in glassware.
 
Elsmar Forum Sponsor

Marc

Fully vaccinated are you?
Staff member
Admin
#2
For those of you who might be interested - I was....

----------snippo----------

From: "David Smith"
Date: Mon, 22 Mar 1999 13:29:20 -0500
Subject: Calibrate/verify glassware

Hi Greg,
Can you provide me with some tips or suggestions on calibrating / verifying burets, sacchrometers,etc.? How do I decide if it is necessary? When the test points can't be altered due to being etched in place, is a calibration check necessary? I have been trying to keep a check using weight comparison; 1grm = 1ml distilled water. This is difficult to justify accuracy. I am puzzeled with this, give me a suggestion if you can, thanks

Sincerly,
David Smith

----------response----------

Subject: Calibrate/verify glassware
Date: Tue, 23 Mar 1999 09:40:16 -0500 (EST)

Moderator Note,

NIST publication NUST/SP-819 "A Procedure for the Effective Recalibration of Liquid-in-Glass Thermometers" states that high quality liquid-in-glass thermometers require only one complete calibration in their lietime. It is possible to avoid the usual requirement for complete recalibration of the instrument by recalibration of a SINGLE previously calibrated temperature. The need to recalibrate is due to the gradual relaxation of residual mechanical strains in the glass that have significant effect on the volume of the bulb. Recalibration of a SINGLE point provides reliable indication of the effect of this change in volume and provides a means for the accurate adjustment of the remainder of the scale. This is how to deal with thermometers. I would think that other glassware would exibit similar strains. Greg
 

Marc

Fully vaccinated are you?
Staff member
Admin
#3
Saw this later...

-----snippo-----

Subject: Liquid in Glass Thermometers, NATA position
Date: Thu, 25 Mar 1999 09:57:52 -0500 (EST)

Date: Wed, 24 Mar 1999 08:32:46 +0800
From: "Carman, Herbert" - health.wa.gov.au
Subject: RE: Calibrate/verify glassware

Liquid in glass thermometers can be checked for changes in the bulb volume over time by a single ice point check. The ice point check is suitable for checking change in the glass elasticity over time. The scale calibration is used to check the scale has been etched onto the glass in the proper place and should not change. Any change in ice point should be linear over the scale. NATA (Australia) require complete calibration of reference thermometers every 10 years and ice point checks every 6 months.

-----Original Message-----

Sent: Tuesday, March 23, 1999 10:40 PM
Subject: Calibrate/verify glassware

Moderator Note,

NIST publication NUST/SP-819 "A Procedure for the Effective Recalibration of Liquid-in-Glass Thermometers" states that high quality liquid-in-glass thermometers require only one complete calibration in their lietime. It is possible to avoid the usual requirement for complete recalibration of the instrument by recalibration of a SINGLE previously calibrated temperature. The need to recalibrate is due to the gradual relaxation of residual mechanical strains in the glass that have significant effect on the volume of the bulb. Recalibration of a SINGLE point provides reliable indication of the effect of this change in volume and provides a means for the accurate adjustment of the remainder of the scale. This is how to deal with thermometers. I would think that other glassware would exibit similar strains.

Greg

-----The REAL Original Message-----

--> From: "David Smith"

Date: Mon,
--> 22 Mar 1999 13:29:20 -0500 Subject: Calibrate/verify glassware
-->
--> Hi Greg, Can you provide me with some tips or suggestions on
--> calibrating / verifying burets, sacchrometers,etc.? How do I decide
--> if it is necessary? When the test points can't be altered due to
--> being etched in place, is a calibration check necessary? I have been
--> trying to keep a check using weight comparison; 1grm = 1ml distilled
--> water. This is difficult to justify accuracy. I am puzzeled with
--> this, give me a suggestion if you can, thanks Sincerly, David
--> Smith...
 
Thread starter Similar threads Forum Replies Date
T Need thoughts on calibration of Class A volumetric glassware General Measurement Device and Calibration Topics 3
D Aircraft Coffee Maker Repair Bench Glassware Calibration General Measurement Device and Calibration Topics 7
T Volumetric Glassware (pipettes) Calibration Uncertainty Measurement Uncertainty (MU) 8
A Calibration of Type A Glassware in Testing Laboratory General Measurement Device and Calibration Topics 3
A Glassware calibration - Do we need to calibrate or recalibrate laboratory glassware General Measurement Device and Calibration Topics 3
R Glassware calibration - Must all A-class glassware be checked before use? General Measurement Device and Calibration Topics 2
M Calibration of Glassware - Pipettes & Flask General Measurement Device and Calibration Topics 2
B UV-A and Illuminance meter Calibration Setup General Measurement Device and Calibration Topics 0
S Calibration Related Posters General Measurement Device and Calibration Topics 2
F Quality Control in Electrical Calibration ISO 17025 related Discussions 0
C Narrow definition of IMTE or calibration possible? ISO 13485:2016 - Medical Device Quality Management Systems 8
dhuot1990 In-House Calibration Program - Biotech Industry General Measurement Device and Calibration Topics 3
M Reference part calibration or verification General Measurement Device and Calibration Topics 12
M Calibration of equipment IATF 16949 - Automotive Quality Systems Standard 4
Q Gage calibration / tracking software General Measurement Device and Calibration Topics 5
C Should resolution be included in uncertainty budget for digital caliper or micrometer calibration? Measurement Uncertainty (MU) 5
S Calibration Due date-Critical Connie General Measurement Device and Calibration Topics 16
Q Request Calibration Info Calibration and Metrology Software and Hardware 16
R Calibration Log - Archive Manufacturing and Related Processes 2
U Calculate acceptance of equipment reading after calibration General Measurement Device and Calibration Topics 2
D Question on Documented Calibration versus ISO 17025 Accredited Calibration ISO 13485:2016 - Medical Device Quality Management Systems 2
U Calculate acceptance of calibration reading Measurement Uncertainty (MU) 1
D Air hood calibration ISO 13485:2016 - Medical Device Quality Management Systems 1
K Ground Bond Test for Class I Medical Electrical Equipment - calibration problems IEC 60601 - Medical Electrical Equipment Safety Standards Series 2
E Calibration/Verification Report Durometer ISO 17025 related Discussions 2
S Medical device equipment calibration Qualification and Validation (including 21 CFR Part 11) 1
J Scrap Material Scale Calibration Required? IATF 16949 - Automotive Quality Systems Standard 21
S 7.1.5.2.1 Calibration/Verification Records IATF 16949 - Automotive Quality Systems Standard 6
K Is Calibration Required for Non-Adjustable Commercial Inspection Devices? General Measurement Device and Calibration Topics 11
F Calibration in GPC/SEC General Measurement Device and Calibration Topics 1
Q Changing calibration frequency Calibration and Metrology Software and Hardware 18
M IATF 16949 SI # 10: Integrated self-calibration of measurement equipment- Needs for explanation IATF 16949 - Automotive Quality Systems Standard 2
M Storing Calibration Certificate Document Control Systems, Procedures, Forms and Templates 7
B Risk analysis for defective measuring or measuring equipment out of calibration General Measurement Device and Calibration Topics 2
S Placing a calibration sticker with someone other than your initials Records and Data - Quality, Legal and Other Evidence 8
J IATF 16949 Calibration/Verification records question ISO 26262 - Road vehicles – Functional safety 6
M Approval of Calibration Certificates General Measurement Device and Calibration Topics 1
lanley liao Question regarding the calibration of monitoring and measure equipment. Oil and Gas Industry Standards and Regulations 3
N IATF Calibration Lean in Manufacturing and Service Industries 5
Q Do these certificates of calibration meet ISO 9001 requirements for traceability to NIST? ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 23
T Plug Gage Calibration Calibration and Metrology Software and Hardware 1
M Load Cell Calibration using a totalizer on a flow meter General Measurement Device and Calibration Topics 0
E Calibration Records needed ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 1
D Limited Range Calibration - 5000 lb Industrial floor scale General Measurement Device and Calibration Topics 3
D Calibration of Small Scales General Measurement Device and Calibration Topics 32
C How to Establish the Calibration & Measurement Capability (CMC)? ISO 17025 related Discussions 1
I IQOQ or just initial calibration required? General Measurement Device and Calibration Topics 3
B Calibration in real life ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 3
J Calibration cycle for monitoring & measuring tools used in medical device manufacturing General Measurement Device and Calibration Topics 5
A Is calibration of test weight required General Measurement Device and Calibration Topics 4

Similar threads

Top Bottom