To measure electromagnetic shielding effectiveness of blended fabrics.
STANDARDS:
GB/T25471、GB/T23326、GB/T30142、QJ2809、SJ20524
CHARACTERISTICS:
1, Color touch screen display, easy menu mode of operation in English and Chinese.
2, The shield box integrated with the flange coaxial tester, performs both tests at the same time, saving time & space.
3, The conductor of the main machine is made of high quality alloy steel with nickel plated surface, robust and durable.
4, The upper and lower mechanisms driven by alloy wire rod on precision guide rail, makes accurate connecting of both clamping faces.
5, Wide range of electromagnetic wave 300K～3GHz, suitable for a variety of testing.
6, Scanning points can be set up to 1601.
7, By connecting to computer, can display dynamic pop graphics and print
8, Special testing software can eliminate systematic errors, and proceed secondary development by using SCPI of the tester.
TECH. PARAMETERS:
1. Technical parameters of flange coaxial test:
1.1. Technical index of flange coaxial device:
1.1.1. Frequency range: 30MHz ~ 3GHz
1.1.2. Characteristic impedance: 50Ω
1.1.3. Voltage standing wave ratio: < 1.2
1.1.4.Transmission loss: < 1dB
1.1.5. Shielding efficiency test range: 95dB
1.1.6. Shielding efficiency test accuracy: 0.01dB
1.2. Technical indicators of network analyzer:
1.2.1. Frequency range: 300KHz ~ 3GHz
1.2.2. Characteristic impedance: 50Ω
1.2.3. Voltage standing wave ratio: < 2.0
1.2.4. IF bandwidth: < 1kHz
1.3. Technical index of attenuator:
1.3.1 Frequency range: 30MHz ~ 3GHz
1.3.2 Characteristic impedance: 50Ω
1.3.3. VSWR: < 1.2
1.3.4. Attenuation: ≥7dB (rated power ≥1W)
1.4. Technical indicators of cables and connecting cables:
1.4.1. Characteristic impedance: 50Ω
1.4.2. Connector: N type
2. Shielding box method test technical parameters:
2.1. Measurement conditions of shielding chamber method:
2.1.1. Environmental requirements: 15℃ to 30℃
2.1.2. Environmental relative humidity: less than 80%
2.1.3. Atmospheric pressure: 86kPa to 106kPa
2.1.4. The sample shall be stored for 48 hours at a temperature of 23℃±5℃ and a relative humidity of 40% to 75% before measurement.
2.1.5. Environmental electromagnetic noise should not affect the test results.
2.2. Technical index of shielding box:
2.2.1. Shielding box size: 1100mm×550mm×1650mm (L×W×H)
2.2.2. Shielding box material: high quality alloy steel
2.2.3. Applicable frequency range: 300kHz to 30MHz
2.2.4. The height between the center of the square hole and the floor of the shielding room is: 1mm
2.2.5. The flange width along the edge of the square hole shall not be less than 25mm
2.2.6. Conductive treatment of flange seat.
2.2.7. Shielding efficiency test range: ≤95dB
2.2.8. Accuracy: 0.01dB
2.3. Measure antenna technical indicators
2.3.1. Antenna type: ring antenna
2.3.2. Frequency range: 100kHz to 30MHz
2.3.3. Antenna arrangement: Adopt coaxial arrangement or vertical placement, and the height of antenna placement should ensure that the bottom of the mast is parallel to the bottom of the test window.
2.4. Test results:
2.4.1. Sample name, manufacturer, model and number.
2.4.2. Name of manufacturer and model of measuring equipment.
2.4.3. Test environment temperature and humidity.
2.4.4. Test method.
2.4.5. Frequency point and shielding effectiveness value.
2.5. Sample size:
2.5.1. Round: 133.1mm, 33.1mm, 66.5mm, 16.5mm (flange coaxial method)
2.5.2. Square: 300mm×300mm (shielded box method)
2.6. Environmental requirements: 23℃±2℃, 45%RH ~ 75%RH, atmospheric pressure 86 ~ 106kPa
2.7. Dimension: 1100mm×550mm×1650mm (L×W×H)
2.8. Power : AC220V, 50Hz, P≤113W
