LFY-401A Static Voltage Decay Tester

The main purpose

Under laboratory conditions, this instrument is suitable for determining the electrostatic properties of fibers, yarns, fabrics, carpets, decorative fabrics and other fabrics or various sheet-like products. The instrument host consists of a corona discharge device and a probe detector. Using a given high-voltage electric field, the fabric is discharged for a fixed time to induce static electricity in the fabric, so as to detect the amount of static electricity, the half-life of static voltage decay, and the residual amount of static electricity to display the electrostatic performance of the tested fabric.

Instrument characteristics

Whether the fabric is seriously charged or not is determined on the one hand by the level of static voltage after high voltage discharge, and on the other hand by the retention time of this static voltage. The electrostatic escape rate on the fabric is expressed by the electrostatic half-life, which is an important evaluation index for testing the electrostatic performance of the fabric.

The instrument consists of two parts: the main engine and the automatic control box, which can be tested by the timing method and the constant pressure method respectively. The instrument uses a digital voltmeter to directly display the instantaneous peak value and half-life value of the fabric during high-voltage discharge. Automatic shutdown of high voltage, automatic shutdown of the motor, easy to operate.

Technical indicators

1. The measurement range of electrostatic voltage value is -10KV~0, and the accuracy is ±5%

2. The half-life time limit range is 0～99.99s/m/h

3. The diameter of the turntable is (200±4) mm, and the speed is 1500 rpm

4. The distance from the center of the turntable to the center of the sample and the center of the electrode is (72±2) mm

5. Diameter of sensing electrode plate (28±0.5) mm

6. The discharge time is 0 to 99.99s (the experiment is scheduled to be 30 seconds ± 0.1 seconds)

7. Discharge distance between needle electrode and sample: 20mm

8. Measuring distance between the sensing electrode and the sample: 15mm

9. Sample test size: 32mm×32mm

10. The instrument has been calibrated for static voltage measurement before it is issued.

11. Check as required before use, the oil cylinder in the main engine must be full of oil (transformer oil)

12. Power supply: 220V 50Hz 1.5kW.

Applicable Standards

GB/T 12703.1-2021 Textiles- -Test methods for electrostatic propensity-

Part 1: Test method using corona charging