Document Details |
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| Name of Department/Committee : | CHD 10 | ||||
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| Document Number : | CHD 10 ( 24334) | ||||
| Document Title [English] : | GENERAL METEOROLOGICAL LIQUID IN-GLASS THERMOMETERS — SPECIFICATION (Third Revision) | ||||
| Document Title [Hindi] : | सामान्य मौसम वैज्ञानिक काँच-द्रव वाला थर्मामीटर — विशिष्टि (तीसरा पुनरीक्षण) | ||||
| Document Type : | Revision | ||||
| Language : | English | ||||
| Priority : | 2 | ||||
| ICS Code : | 17.200.20 | ||||
| Date of Project Approval : | 05-12-2023 | ||||
| Standards to be Revised : |
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| Standards to be Superseded : |
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Classification Details |
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| Group : | Chemicals, Plastics and their Products including packaging and Environment |
| Sub Group : | Chemical Products |
| Sub Sub Group : | Laboratory glassware and test methods |
| Aspects : | Product Specification |
| Risk : | None |
| Certification : | Voluntary Certification |
| Short Commom Man's Title : | GENERAL METEOROLOGICAL THERMOMETERS LIQUID-IN-GLASS - SPECIFICATION |
| ITCHS Code : | |
| Ministry : |
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| Sustainable development Goals : |
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| Degree of Equivalence : | Indigenous |
| Identical/Equivalent Standards : | |
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::Cross Referenced Indian Standard:: |
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| Sl. No. | Is No & Year | IS Title | |
| 1 | IS 321: 1964 | Specification for absolute alcohol (First Revision) | |
| 2 | IS 347: 2023 | Varnish shellac for general purposes - Specification (Second Revision) | |
| 3 | IS 451: 1999 | Technical supply conditions for wood screws (Third Revision) | |
| 4 | IS 2627: 1979 | Glossary of terms relating to liquid - In - Glass thermometers (First Revision) | |
| 5 | IS 4610: 1968 | Specification for glass tubes for general purpose and reference thermometers | |
| 6 | IS 6274: 1971 | Method of calibrating liquid - In - Glass thermometers | |
| Sl.No. | Synosis Points | |
| 1 | For general meteorological work, measurements of temperature and humidity of air are made with a set of four liquid-in-glass thermometers, one maximum, one minimum and two ordinary, the bulb of one of which is covered by a layer of thin wet cloth. They are provided with wooden mounts for extra strength and robustness (see Fig. 1) and exposed in louvered thermometer screens. | |
| 2 | This standard was first published in 1970. In the first revision in 1983, the quantity of raw materials of construction such as glass, thermometric liquid, etc., was revised along with the requirements of dimensions and accuracy. And in the second revision in 1992, the overall dimensions of the thermometers were changed. The plastic scale was specified. | |
| 3 | In this third revision, Kerosene oil as a thermometric liquid has been added. A sampling plan for lot testing has also been prescribed and several editorial changes such as the inclusion of the Reference clause, Hindi Title, ICS no, BIS certification marking clause, etc. have also been incorporated. | |
Timeline Details |
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Stages |
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| Sl. No. |
Stage | Date of Occurence | Remarks | Circulated to | Files |
| 1 | Generation of Document Number | 05-12-2023 | ------- | ||
| 2 | P-Draft Waived | 20-12-2023 | In the 22nd meeting of CHD 10, the committee decided to send the revised draft for WC. | ------- | |
| 3 | WC Draft | 20-12-2023 | Duration : 60 Days Submitted for HOD approval |
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| 4 | WC Draft | 21-12-2023 | WC approved by HOD |
CHDC CHD 10 : 5, | ------- |