JB/T 9944-1999 This standard is a revision of ZB J42 035-89 "Technical Conditions for Magnetic Grating Digital Display". Compared with ZB J42 035-89, the main differences are: - Changed "Continuous Impact Resistance Test" to "Vibration Test"; - Re-edited according to relevant regulations. This standard specifies the technical requirements, test methods, inspection rules, marking, packaging and storage of magnetic grating digital display. This standard is applicable to magnetic grating digital display that uses magnetic grating linear position sensors as detection parts and displays linear displacement digitally. This standard was first issued in June 1989. JB/T 9944-1999 Technical Conditions for Magnetic Grating Digital Display JB/T9944-1999 Standard Download Decompression Password: www.bzxz.net

IC'S 25.060.10
Machinery Industry Standard of the People's Republic of China
JBIT9944-1999
Published on May 20, 1999
Technical Conditions
Implemented on January 1, 2000
National Bureau of Machinery Industry
JR/T4944-1999
This standard is revised on the basis of 2BJ42035-89 "Technical Conditions for Magnetic Digital Display". The technical content of this standard is basically the same as 2BJ4235-89. The main differences are: 1. "Continuous impact resistance test" is changed to "vibration test"; 2. It is re-edited according to relevant regulations.
4 This standard replaces ZBJ42035-89 from the date of implementation. This standard is proposed and managed by the National Technical Committee for Standardization of Enterprise-affiliated Machine Tools. The responsible drafting unit of this standard is Shanghai Machine Tool Research Institute, and the main drafter of this standard is Tan Shizhong.
This standard was first issued in June 1989.
Machinery Industry Standard of the People's Republic of China
Magnetic grating digital display meter
Technical conditions
JB/T9944—E999
Code.4203589
This standard specifies the installation requirements, test methods, inspection rules, marking, packaging and storage of magnetic grating digital display meter. The standard applies to magnetic grating digital display meter (referred to as digital display meter) with magnetic grating line displacement sensor (referred to as magnetic grating sensor) as detection element and digital display of displacement display
2 Reference standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised. Users of this standard should explore the possibility of using the latest versions of the following standards. GB 1911990
Packaging, storage and transportation pictorial symbols
GB/T154641995
General technical conditions for instrument packaging
JB/T6632—1999
3 Technical requirements
General technical conditions for machine tool digital control systems 3.1 Working environment and working conditions
3.1.1 The temperature range of the working environment is 0-45℃; when the working environment temperature is 20+5℃, the relative humidity shall not be greater than 90%. 3.1.2 The voltage used is 50Hz, the rated voltage is 22DV, and the voltage range is 85%-110% of the rated voltage. %. 3.1.3 There should be no obvious corrosive gas and powder in the working environment. 3.2 Appearance quality
3,2.! The surface should not have rust, bumps and layer shedding, and various signs should be correct and clear. 3,2.2 All fastening parts should be firm and reliable, and all rotating parts should be flexible without blocking and loosening. 3.3 Basic skills
After the digital display meter and the data sensor form a measuring system, it can be used in any measuring position, and must have the function of light direction identification and counting. 3.4 Resolution
The resolution of the digital display meter is shown in Figure 1.
Table resolution
Resolution 100
3. 5 Accuracy
The accuracy of the digital meter should be greater than ±1 minimum indication. 3.6 Stability
Under the specified operating conditions, the stability of the digital meter should not be greater than +1 minimum indication. 3.7 Response speed
Approved by the State Machinery Industry Bureau on May 20, 1999 μm
Implementation on January 1, 2000
JB/T 99441999
After the digital energy meter and the magnetic grating sensor form a position measurement system, the digital display can respond to two types of measuring disk displacement: [2m/min and 60m/min.
3. Safety
3.8.1 The leakage current between any terminal of the power socket and the machine should not exceed 3.5mA.3.8.2 The DC insulation resistance between any terminal of the power socket and the machine should not be less than 5M0.3.8.3 When the voltage is AC1500V or DC2100V, there should be no breakdown phenomenon.3.9 Anti-interference
The digital display should have electromagnetic compatibility. When subjected to interference, the indication value should not be greater than ±1 minimum indication value. 3.10 Vibration test
The digital display should be able to withstand the vibration test specified in 2.4.2.1 of B/T8832-1999. 3.1 Reliability
The reliability index of the digital display is measured by the mean time between failures (MTBF). The MTBF should not be less than 5000h. 4 Test method
The test method of the digital display should be carried out in accordance with relevant regulations. 5 Inspection rules
The inspection rules of the digital display should be carried out in accordance with relevant regulations. 6 Marking, packaging and storage
6. The digital display should be marked with:
a) manufacturer name;
b) product type and model;
) power supply parameters;
d) factory number and ex-factory date Www.bzxZ.net
6.2 The packaging of the digital display should include:
e) qualification certificate;
b) instruction manual;
) packing list;
d) relevant attachments.
6.3 The packaging should comply with the provisions of GB/15464, and the packaging and transportation graphic markings should comply with the provisions of GB191. 6.4 Storage environment
6.4.1 In the case of no packaging, the storage environment temperature range is 0-45℃. When the storage environment temperature is within 209±5℃, the relative fading shall not be greater than 90%.
There should be no obvious corrosive gas in the storage environment. 6.4.z In the case of packaging, the storage environment temperature range is -25-55℃: when the storage environment temperature is within 20±5%, the relative humidity is not greater than %.
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