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JJF 1272-2011: Calibration Specification for Resistance and Capacitance Dew Point Hygrometer
Status: Valid JJF 1272: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| JJF 1272-2011 | English | 259 |
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Calibration Specification for Resistance and Capacitance Dew Point Hygrometer
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JJF 1272-2011
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| JJF 1272-1990 | English | 319 |
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O.T.N. of Free-field Sound Pressure Primary Standard in Air
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Basic data | Standard ID | JJF 1272-2011 (JJF1272-2011) | | Description (Translated English) | Calibration Specification for Resistance and Capacitance Dew Point Hygrometer | | Sector / Industry | Metrology & Measurement Industry Standard | | Classification of Chinese Standard | A61 | | Classification of International Standard | 17.200 | | Word Count Estimation | 11,185 | | Date of Issue | 2011-01-21 | | Date of Implementation | 2011-04-21 | | Quoted Standard | JJF 1094-2002; JJF 1001-1998; JJF 1059-1999 | | Regulation (derived from) | AQSIQ Announcement No. 15 of 2011 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine | | Summary | This standard applies to the dew point hygrometer or RC RC France French dew point sensor, dew point transmitter calibration. Other works (such as crystal frequency, optical absorption, etc.) dew point hygrometer or dew point sensors, dew point transmitter can be calibrated with reference to this specification. | JJF 1272-2011: Calibration Specification for Resistance and Capacitance Dew Point Hygrometer---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Calibration Specification for Resistance and Capacitance Dew Point Hygrometer
People's Republic of China National Metrology Technical Specifications
Resistive and capacitive dew point hygrometer calibration method specification
Issued on. 2011-01-21
2011-04-21 implementation
The State Administration of Quality Supervision, Inspection and Quarantine released
Resistive and capacitive dew point hygrometer calibration method specification
rometer
This specification by the State Administration of Quality Supervision, Inspection and Quarantine approved on January 21, 2011, and from
From April 21, 2011 into effect.
Focal point. the National Technical Committee stoichiometric physical
The main drafting units. China Institute of Metrology
Participated in the drafting unit. Jiangsu Province Institute of Metrology
This specification by the responsible National Technical Committee stoichiometric physical interpretation
The main drafters of this specification.
Zhan Yuan (China Institute of Metrology)
Ren Chengxia (Jiangsu Province Institute of Metrology)
Zhengsheng Qing (Jiangsu Province Institute of Metrology)
Drafters participate.
Yi Hong (China Institute of Metrology)
Ren Changqing (China Institute of Metrology)
table of Contents
1 Scope (1)
2. Referenced Documents (1)
3 Overview (1)
4 Metrological characteristics (2)
Accuracy 4.1 dewpoint value (2)
4.2 dewpoint meter electrical signal value (2)
Dew point stability 4.3 meter (2)
Calibration Condition 5 (2)
5.1 ambient laboratory conditions (2)
5.2 humidity standard equipment, and other equipment (2)
6 calibration items and calibration methods (3)
6.1 Calibration Preparing (3)
6.2 Calibration of dew point (3)
Stability 6.3 dewpoint meter (drift) (4)
7 Calibration Results The expression (4)
8 Recalibration interval (4)
Appendix A dew point calibration original record format (5)
Appendix B dew point calibration certificate within the page format (6)
Resistive and capacitive dew point hygrometer calibration method specification
1 Scope
This instruction applies to resistive and capacitive or resistive and capacitive method dew point hygrometer method dew point sensor, dew point transmitter (hereinafter referred to as dew
Point Apparatus) calibration. Other works (such as the crystal frequency, optical absorption, etc.) dew point hygrometer or a dew point sensor
, A dew point transmitter can be calibrated with reference to the present specification.
2 Citations
This specification references the following documents.
JJF 1094-2002 measuring instrument characteristics evaluation
JJF 1001-1998 common measurement terms and definitions
JJF 1059-1999 Measurement Uncertainty and Representation
When using this specification it should be noted that using the currently valid version of the documents cited.
3 Overview
Dewpoint meter generally refers to polymer humidity resistance, humidity capacitance, aluminum oxide film as the sense of the wet element, measuring gas
Body humidity instrumentation, commonly used in the humidity range of measurement. Dewpoint meter is mainly measured by the humidity sensor or transducer and
Circuit.
Dewpoint meter is widely used in petrochemical, electronics, electric power, metallurgy and other departments for testing gas humidity, including interrupted test
Volume and on-line measurement.
1 resistive and capacitive humidity sensor method Schematic
Humidity sensor consists of an electrode, a sense of wet material and the electrode substrate composed of several parts. Wherein the upper electrode is made of a special
The conductive material, can ensure that the water molecules to pass through while protecting moisture sensitive materials from dust, oil or conductive particles
Impact. The common electrode substrate material is glass or silicon, is mainly used to support the sensor structure (see Figure 1). sense
Wet material is generally alumina or polymer active polymer film that can absorb water vapor, and dynamic equilibrium, which
Electrical parameters such as capacitance, resistance, dielectric constant, or frequency and the measured water vapor content of the system have some direct or indirect
Function relationships. Changes in humidity sensor measurement system electrical parameters, and converted into the corresponding dew point.
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