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JJF 1282-2025: Calibration Specification for Time Delay Relays
Status: Valid JJF 1282: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| JJF 1282-2025 | English | 439 |
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4 days [Need to translate]
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Calibration Specification for Time Delay Relays
| Valid |
JJF 1282-2025
|
| JJF 1282-2011 | English | 329 |
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3 days [Need to translate]
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Calibration specification for electronic time relay
| Valid |
JJF 1282-2011
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| JJF 1282-1990 | English | 439 |
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4 days [Need to translate]
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O.T.N. of Primary Standard for Pendulum Impact Energy(Charpy)
| Obsolete |
JJF 1282-1990
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Basic data | Standard ID | JJF 1282-2025 (JJF1282-2025) | | Description (Translated English) | Calibration Specification for Time Delay Relays | | Sector / Industry | Metrology & Measurement Industry Standard | | Word Count Estimation | 21,271 | | Date of Issue | 2025-02-08 | | Date of Implementation | 2025-08-08 | | Issuing agency(ies) | State Administration for Market Regulation | JJF 1282-2025: Calibration Specification for Time Delay Relays---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.
National Metrology Technical Specifications of the People's Republic of China
Time Relay Calibration Specifications
Released on 2025-02-08
2025-08-08 Implementation
The State Administration for Market Regulation issued
Time Relay Calibration Specifications
TimeDelayRelays
Replace JJF 1282-2011
Responsible unit. National Technical Committee for Time and Frequency Metrology
Main drafting unit. Chongqing Metrology and Quality Inspection Institute
Jiangsu Institute of Metrology
Zhejiang Institute of Metrology
Wenzhou Institute of Metrology
Participating in the drafting. Xinling Electric Co., Ltd.
China Testing Technology Research Institute
This specification is entrusted to the National Technical Committee for Time and Frequency Metrology for interpretation
The main drafters of this specification are.
Jiang Li (Chongqing Institute of Metrology and Quality Inspection)
Jin Rong (Jiangsu Institute of Metrology)
Luo Hao (Chongqing Institute of Metrology and Quality Inspection)
Han Hailin (Zhejiang Institute of Metrology)
Zhou Xiaohua (Wenzhou Institute of Metrology)
Participating drafters.
Li Yongfang (Xinling Electric Co., Ltd.)
He Shan (China Testing Technology Research Institute)
Table of contents
Introduction (II)
1 Scope(1)
2 References(1)
3 Terms and definitions (1)
4 Overview(2)
5 Metering characteristics (2)
5.1 Delay setting error (2)
5.2 Delay repeatability (2)
6 Calibration conditions(3)
6.1 Environmental conditions(3)
6.2 Measurement standards and other equipment (3)
7 Calibration items and calibration methods (3)
7.1 Calibration items (3)
7.2 Calibration method (4)
8 Expression of calibration results (8)
9 Recalibration interval (8)
Appendix A Original Record Format (9)
Appendix B Calibration Certificate (Inner Page) Format (10)
Appendix C Examples of uncertainty assessment of calibration results (11)
Introduction
JJF 1001 "General metrological terms and definitions", JJF 1071-2010 "Rules for the preparation of national metrological calibration specifications"
Together with JJF 1059.1-2012 "Evaluation and Expression of Uncertainty in Measurement" it forms the basis for the formulation of this specification.
Sexual norms.
Compared with JJF 1282-2011, in addition to editorial revisions, the main changes are as follows.
--- Added introduction;
---Changed the referenced file content;
--- Added the measurement characteristics and calibration methods of mechanical time relays;
---Improved the calibration method of power-off delay time relay.
The previous versions of this specification are as follows.
---JJF 1282-2011.
Time Relay Calibration Specifications
1 Scope
This specification applies to the calibration of time parameters of time relays.
2 References
This specification references the following documents.
JB/T 10047-2021 Electronic time relay
For any referenced document with a date, only the version with the date is applicable to this specification; for any referenced document without a date,
The latest version (including all amendments) shall apply to this specification.
3 Terms and definitions
3.1 Setting preset
The operation of presetting a delay time for the time relay.
3.2 Digital setting digitalpreset
Use thumbwheel switches, band switches and buttons as operating devices to digitally indicate the preset delay time.
Setting.
3.3 Analog setting analogpreset
A knob is used as an operating device to indicate the setting of the preset delay time in a scaled manner.
3.4 Normally closed contact
A time relay contact whose contacts are in a closed state during the delay process and in an open state at the end of the delay.
3.5 Power-on delay powerondelay
The delay from the start of power supply to the output switching to the action state after the set time.
[Source. JB/T 10047-2021, 3.1.4]
3.6 Power-off delay poweroffdelay
When the power is on, the output immediately switches to the action state; when the power is removed, the timing starts, and after the set time, the output switches to the action state.
Delay to release state.
[Source. JB/T 10047-2021, 3.1.5]
3.7 Off delay controloffdelay
After the power is supplied, the output immediately switches to the action state when the control signal is applied, and starts to switch to the action state when the control signal is removed.
The delay of the oversetting time output circuit switching to the released state.
[Source. JB/T 10047-2021, 3.1.6]
3.8 Controlondelay
After the power is supplied, the output circuit immediately switches to the action state from the moment the control signal is applied, and from this point on
Timing, when the set time is reached, the output circuit switches to the release state for a delay.
[Source. JB/T 10047-2021, 3.1.9]
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