JJG 874: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| JJG 874-2007 | English | 479 |
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Verification Regulation of Temperature Indication Controller
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JJG 874-2007
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| JJG 874-1994 | English | 279 |
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Verification Regulation of Temperature Indication Controller
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JJG 874-1994
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PDF similar to JJG 874-2007
Basic data | Standard ID | JJG 874-2007 (JJG874-2007) | | Description (Translated English) | Verification Regulation of Temperature Indication Controller | | Sector / Industry | Metrology & Measurement Industry Standard | | Classification of Chinese Standard | A54 | | Classification of International Standard | 17.200 | | Word Count Estimation | 12,130 | | Date of Issue | 2007-02-28 | | Date of Implementation | 2007-08-28 | | Older Standard (superseded by this standard) | JJG 874-1994 | | Quoted Standard | AQSIQ Announcement No. 41 of 2007 | | Regulation (derived from) | AQSIQ Announcement No. 41 of 2007 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine | | Summary | This standard applies to measuring range (-50 ~ +300)��C, using temperature thermistor or other temperature sensors Semiconductor Analog and digital temperature indicator, temperature indicator controller and temperature control instrument for initial verification, subsequent testing and use of the test. | JJG 874-2007: Verification Regulation of Temperature Indication Controller---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.
Verification Regulation of Temperature Indication Controller
State verification procedures People's Republic of China
Temperature indicator controller
Posted 2007-02-28
2007-08-28 implementation
The State Administration of Quality Supervision, Inspection and Quarantine released
Temperature indicator controller verification procedures
Temp
Replacing JJG 874-1994
The regulations by the State Administration of Quality Supervision, Inspection and Quarantine, 2007 February 28 ratification and
From August 28, 2007 into effect.
Focal point. the National Technical Committee of temperature measurement
Main drafting unit. Tianjin Institute of Measurement Technology
Participated in the drafting unit. Changzhou Institute of Measurement Technology
Italy Oulong Strong (China/Hong Kong) representative office
Testo Instruments International Trading (Shanghai) Co., Ltd.
Xuzhou elite Electrical Technology Co., Ltd.
The temperature measurement procedures commissioned the National Technical Committee is responsible for interpretation
The main drafters of this procedure.
WANG Chao (Tianjin Measurement Institute of Technology)
Liu Wei (Tianjin Measurement Institute of Technology)
Tian Yun (Tianjin Measurement Institute of Technology)
Drafters participate.
Swelled (Changzhou Institute of Technology measurement)
Wu Zhengrong (Italy Oulong strong (China/Hong Kong) representative office)
Chen Jun (Testo Instruments International Trading (Shanghai) Co., Ltd.)
Lichao Fei (Xuzhou elite Electrical Technology Co., Ltd.)
table of Contents
1 Scope (1)
2 Terms (1)
3 Overview (1)
4 metering performance requirements (2)
4.1 Indication error (2)
4.2 Stability (2)
4.3 setpoint error (2)
4.4 switching difference (2)
5 General Requirements (2)
5.1 Appearance (2)
5.2 Insulation resistance (3)
5.3 dielectric strength (3)
6 Control of measuring instruments (3)
6.1 Verification condition (3)
6.2 Verification Project (4)
6.3 Verification Methods (4)
Processing 6.4 Verification Results (6)
6.5 test cycle (6)
Appendix A Calibrating temperature indicator control record format (7)
Temperature indicator controller verification procedures
1 Scope
The order applies to measuring range (-50 ~ 300) ℃, using temperature thermistor or other semiconductor test class
Temperature Sensor Analog and digital temperature indicator, indicating temperature controller and temperature control device (hereinafter referred to as the thermostat
Meter) of the initial verification, subsequent verification and use of tests.
2 Terms
2.1 temperature thermistor thermomistor
The resistance value of index changes with temperature was polycrystalline semiconductor materials for temperature measurement of the temperature sensing element.
2.2 Setpoint error errorofsetpoint
Output variable according to the requirements output, the temperature difference between the measured value and the set point temperature corresponding to the value.
2.3 Switching value cut-offvalue
When the temperature controller stroke (or the next trip), the output from one state to another state of the measured temperature value.
2.4 switching difference differenceofcut-offvalue
, The difference between the value of the next trip switch.
2.5 Division value scaleinterval
The difference between two values corresponding to two adjacent scale marks.
2.6 reticle graduationline
Within the limits shown the limits to the scale value scale marks segments.
2.7 master reticle mainscalemark
Limit value within the limits shown scale scale marks segments have specific values. Its more general line dividing line thickness.
3 Overview
Temperature controller general instructions by the temperature control composed of two parts together or separately.
Temperature part is based on the temperature sensor varies with temperature and changes in the characteristics, the respective circuits (including application operation
After amplifiers, microprocessors, etc.) processed by meter indicates the corresponding temperature.
Temperature setting circuit part generally consists of the corresponding signal processing circuit and the comparator circuit, digital control execution circuit
composition.
Figure 1 indicates the temperature controller Block Diagram
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