ASTM D5032-11

Standard Practice for Maintaining Constant Relative Humidity by Means of Aqueous Glycerin Solutions

SIGNIFICANCE AND USE
Controlled relative humidity environments are important for conditioning materials for shelf-life studies or for investigating the change in physical or dielectric properties after exposure.
The use of aqueous-glycerin solutions reduces the possibility of contamination of the materials or corrosion of electrode systems which would be more likely to result from saturated salt or acid water solutions.  
Applicable material specifications should state the exposure conditions, including time, temperature and relative humidity that a material should be subjected to before subsequent testing. Typical conditions are given in Practice D618 or D6054.
SCOPE
1.1 This practice describes a method for obtaining constant relative humidity ranging from 30 to 98 % at temperatures ranging from 0 to 70°C in relatively small containers by means of an aqueous glycerin solution.
1.2 This practice is applicable for closed systems such as environmental conditioning containers.
1.3 This practice is not recommended for the generation of continuous (flowing) streams of constant humidity unless precautionary criteria are followed to ensure source stability.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 31-Jul-2011
• ICS: 07.060 - Geology. Meteorology. Hydrology
• ICS: 91.140.30 - Ventilation and air-conditioning systems
• Technical Committee: D09 - Electrical and Electronic Insulating Materials
• Drafting Committee: D09.12 - Electrical Tests

Relations

• Replaces: ASTM D5032-97(2003) - Standard Practice for Maintaining Constant Relative Humidity by Means of Aqueous Glycerin Solutions
• Effective Date: 01-Aug-2011
• Replaced By: ASTM D5032-19 - Standard Practice for Maintaining Constant Relative Humidity by Means of Aqueous Glycerin Solutions
• Effective Date: 01-Mar-2019
• Referred By: ASTM D115-17 - Standard Test Methods for Testing Solvent Containing Varnishes Used for Electrical Insulation
• Effective Date: 01-Aug-2011
• Referred By: ASTM D7444-18a - Standard Practice for Heat and Humidity Aging of Oxidatively Degradable Plastics
• Effective Date: 01-Aug-2011
• Referred By: ASTM D1000-17 - Standard Test Methods for Pressure-Sensitive Adhesive-Coated Tapes Used for Electrical and Electronic Applications
• Effective Date: 01-Aug-2011
• Referred By: ASTM D257-14(2021)e1 - Standard Test Methods for DC Resistance or Conductance of Insulating Materials
• Effective Date: 01-Aug-2011
• Referred By: ASTM D618-21 - Standard Practice for Conditioning Plastics for Testing
• Effective Date: 01-Aug-2011
• Referred By: ASTM D876-21 - Standard Test Methods for Nonrigid Vinyl Chloride Polymer Tubing Used for Electrical Insulation
• Effective Date: 01-Aug-2011
• Referred By: ASTM D150-22 - Standard Test Methods for AC Loss Characteristics and Permittivity (Dielectric Constant) of Solid Electrical Insulation
• Effective Date: 01-Aug-2011
• Referred By: ASTM D229-19e1 - Standard Test Methods for Rigid Sheet and Plate Materials Used for Electrical Insulation
• Effective Date: 01-Aug-2011
• Referred By: ASTM D2305-18 - Standard Test Methods for Polymeric Films Used for Electrical Insulation
• Effective Date: 01-Aug-2011
• Referred By: ASTM D3032-21a - Standard Test Methods for Hookup Wire Insulation
• Effective Date: 01-Aug-2011
• Referred By: ASTM D4470-18 - Standard Test Method for Static Electrification
• Effective Date: 01-Aug-2011

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D5032 − 11
Standard Practice for
Maintaining Constant Relative Humidity by Means of
1
Aqueous Glycerin Solutions
This standard is issued under the fixed designation D5032; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope Part 2:Sulfuric Acid Solutions (1981)
1.1 This practice describes a method for obtaining constant
3. Summary of Practice
relative humidity ranging from 30 to 98% at temperatures
rangingfrom0to70°Cinrelativelysmallcontainersbymeans
3.1 Controlled relative humidity environments are gener-
of an aqueous glycerin solution.
ated using mixtures of glycerin and water.
1.2 This practice is applicable for closed systems such as
3.2 Practice E104 contains methods for maintaining con-
environmental conditioning containers.
stant relative humidity environments using aqueous saturated
salt solutions or various strength sulfuric acid-water systems.
1.3 This practice is not recommended for the generation of
continuous (flowing) streams of constant humidity unless
4. Significance and Use
precautionary criteria are followed to ensure source stability.
1.4 This standard does not purport to address all of the 4.1 Controlled relative humidity environments are impor-
safety concerns, if any, associated with its use. It is the
tant for conditioning materials for shelf-life studies or for
responsibility of the user of this standard to establish appro- investigating the change in physical or dielectric properties
priate safety and health practices and determine the applica-
after exposure.
bility of regulatory limitations prior to use.
4.2 The use of aqueous-glycerin solutions reduces the pos-
sibility of contamination of the materials or corrosion of
2. Referenced Documents
electrode systems which would be more likely to result from
2
2.1 ASTM Standards:
saturated salt or acid water solutions.
D618Practice for Conditioning Plastics for Testing
4.3 Applicable material specifications should state the ex-
D4023Terminology Relating to Humidity Measurements
3
posure conditions, including time, temperature and relative
(Withdrawn 2002)
humidity that a material should be subjected to before subse-
D6054Practice for Conditioning Electrical Insulating Mate-
3
quent testing.Typical conditions are given in Practice D618 or
rials for Testing (Withdrawn 2012)
D6054.
E104Practice for Maintaining Constant Relative Humidity
by Means of Aqueous Solutions
5. Apparatus
2.2 Other Documents:
4
DIN50008 Constant Climates over Aqueous Solutions
5.1 Container, airtight, of a material not acted upon by
Part 1:Saturated Salt and Glycerol Solutions
coppersulfate(orwiththeglycerinsolutioncontainedinatray
made of a material not acted upon by copper sulfate).
1
This practice is under the jurisdiction of ASTM Committee D09 on Electrical
5.2 Refract meter, covering the range of 1.33 to 1.47
andElectronicInsulatingMaterialsandisthedirectresponsibilityofSubcommittee
(sodium) with an accuracy of 0.0003.
D09.12 on Electrical Tests.
Current edition approved Aug. 1, 2011. Published September 2011. Originally
approved in 1990. Last previous edition approved in 2003 as D5032–97(2003).
6. Glycerin Solution
DOI: 10.1520/D5032-11.
2
6.1 Use a good industrial grade of glycerin (“high gravity”
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
and “dynamite” grades have been found to be satisfactory) in
Standards volume information, refer to the standard’s Document Summary page on
distilled water. Calculate the concentration in terms of the
the ASTM website.
3 refractive index, (R), at 25°C for the desired relative humidity
The last approved version of this historical standard is referenced on
www.astm.org. at any temperature between 0 and 70°C as follows:
4
Available from Deutsches Institut fur Normung, 4-10 Burggrenzenstrasse
1
Postfach 1107, D-1000 Berlin, Germany. Also available from American National
2 2 2
R 5 ~= 1001A 1A 2 H1A 2 A! 11.3333 (1)
~ ! ~ !
Standards Institute, 25 W. 43rd St., 4th Floor, New York, NY 10036. 715.3
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D5032 − 11
where: followingoptionsmustbedone:Reducetheloadingbelowthat
suggested in 7.5 or increase the depth of the solution.
T = temperature of the solution, °C,
2
A = 25.60−0.1950T+0.0008T , and 3
NOTE 2—For example, a loss of 0.26 mLwater/in. of a glycerin-water
H = relative humidity, percent.
solution adjusted to produce a 96% relative
...

This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
An American National Standard
Designation:D5032–97 (Reapproved 2003) Designation:D5032–11
Standard Practice for
Maintaining Constant Relative Humidity by Means of
1
Aqueous Glycerin Solutions
This standard is issued under the fixed designation D5032; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This practice describes a method for obtaining constant relative humidity ranging from 30 to 98% at temperatures ranging
from 0 to 70°C in relatively small containers by means of an aqueous glycerin solution.
1.2 This practice is applicable for closed systems such as environmental conditioning containers.
1.3 This practice is not recommended for the generation of continuous (flowing) streams of constant humidity unless
precautionary criteria are followed to ensure source stability.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
D618 Practice for Conditioning Plastics for Testing
D4023 Terminology Relating to Humidity Measurements
D6054 Practice for Conditioning Electrical Insulating Materials for Testing
E104 Practice for Maintaining Constant Relative Humidity by Means of Aqueous Solutions
2.2 Other Documents:
3
DIN50008 Constant Climates Overover Aqueous Solutions
Part 1: Saturated Salt and Glycerol Solutions
Part 2: Sulfuric Acid Solutions (1981)
3. Summary of Practice
3.1 Controlled relative humidity environments are generated using mixtures of glycerin and water.
3.2 Practice E104 contains methods for maintaining constant relative humidity environments using aqueous saturated salt
solutions or various strength sulfuric acid-water systems.
4. Significance and Use
4.1 Controlledrelativehumidityenvironmentsareimportantforconditioningmaterialsforshelf-lifestudiesorforinvestigating
the change in physical or dielectric properties after exposure.
4.2 The use of aqueous-glycerin solutions reduces the possibility of contamination of the materials or corrosion of electrode
systems which would be more likely to result from saturated salt or acid water solutions.
4.3 Applicable material specifications should state the exposure conditions, including time, temperature and relative
humidity,humidity that a material should be subjected to before subsequent testing.Typical conditions are given in Practice D618
or D6054.
1
ThispracticeisunderthejurisdictionofASTMCommitteeD09onElectricalandElectronicInsulatingMaterialsandisthedirectresponsibilityofSubcommitteeD09.12
on Electrical Tests.
Current edition approved March 10, 2003. Published April 2003. Originally approved in 1990. Last previous edition approved in 1997 as D5032–97. DOI:
10.1520/D5032-97R03.
Current edition approved Aug. 1, 2011. Published September 2011. Originally approved in 1990. Last previous edition approved in 2003 as D5032–97(2003). DOI:
10.1520/D5032-11.
2
ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,[e-mail]ards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from Deutsches Institut fur Normung, 4-10 Burggrenzenstrasse Postfach 1107, D-1000 Berlin, Germany. Also available from American National Standards
Institute, 25 W. 43rd St., 4th Floor, New York, NY 10036.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
D5032–11
5. Apparatus
5.1 Container, airtight, of a material not acted upon by copper sulfate (or with the glycerin solution contained in a tray made
of a material not acted upon by copper sulfate).
5.2 RefractometerRefract meter, covering the range of 1.33 to 1.47 (sodium) with an accuracy of 0.0003.
6. Glycerin Solution
6.1 Use a good industrial grade of glycerin (“high gravity” and “dynamite” grades arehave been found to be satisfactory) in
distilled water. Calculate the concentration in terms of the refractive index, (R), at 25°C for the desired relative humidity at any
temperature between 0 and 70°C as follows:
1
2 2 2
R 5 100
...