
TJD220 Surface Roughness Tester
Main feature: *Shell used to pull aluminum mold design, durable, anti-electromagnetic interference ability significantly, in line with the design of the new trend. *Using high-speed DSP processor for data processing and calculation, measurement and computation speed is greatly improved. *Liquid crystal display wide temperature using OLED color display, popular high brightness, no visual angle, is suitable for various occasions. *The lithium ion rechargeable battery, can work for a long time, no memory effect, can while charging, charging time is short, long battery life. * Using a dedicated charger or computer USB port for charging, convenient and quick. *Real-time monitoring of lithium battery power and display, and to remind users to charge with charging progress indication. *Automatic shutdown function and low power design of software and hardware of the instrument with long working hours, suitable for field use. *The surface roughness of metal and non-metallic. *Pocket-size & economically price *Large measuring range suitable for most materials *Optimized electric circuit design with transducer structure-design, high integrate power. *It could test ex-circle, flat surface, conical surface and also test groove larger than 80*30mm. Specification JD220 Testing parameters Ra, Rz, Rq, Rt Measuring range (um) Ra, Rq: 0.05-15.0 Rz, Rt : 0.1-50.0 Sample length (mm) 0.25, 0.80, 2.50 Evaluation length(mm) 1.25, 4.0, 5.0 Stroke length (mm) 6 Indication accuracy 0.01 Indication error ±(7-10)% Variability <12% Power Rechargeable li-battery Stylus static force: ≤ 0.016N Force measuring rate of change ≤ 800N/m Working temperature -20℃~40℃ Relative humidity <90% Weight of Host 200g Size 106mmx70mmx24mm Standard Configuration Name QTY 1 Host 1 2 Calibration block and bracket 1 3 Charger 1 4 Data line 1 5 Operating manual 1 6 Warranty card 1 7 Certificate of approval 1 8 Instrument case 1