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Product Name: Sadt Sr220 Handheld Surface Roughness Tester Model NO.: SR220 Color: Blue Trademark: SADT Transport Package: Carton Specification: ISO9001 Origin: China HS Code: 90318090 Product Description Surface Roughness TesterSADT SR220SR220 portable surfaces roughness testeris a small handheld instrument with big LCD,high accuracy and various parameters. It can beused in the laboratory, inspection area or whereveron-site surface roughness testing is required. Themeasuring data of SR220 can be output to PC or microprinter. KEY FEATURESΔ 28 parameters: Ra, Rq, Rz, Rt, Rp, Rv, RS, RSm, Rz(JIS), Ry(JIS), RSk, R3z, Rmax, Rpc, Rmr, Rku,ΔRΔa, RΔq, Rδc, Ry, Rk, Rpk, Rvk, Mr1, Mr2, A1, A2, V0; (SR220 only) Δ320μm wide range high accuracy induc tance probe; ΔFour filtering methods of RC, PC-RC, GAUSS and D-P; ΔCompatible with four standards of ISO, DIN, ANSI and JIS; Δ128×64 2.7" dot matrix OLED displays all parameters, graphs and menu; (SR220 only) ΔDSP chip is used to control and process data with high speed and low power consumption; ΔBuilt-in lithium ion chargeable batter y and control circuit; ΔWith internal memor y chip, it can store 20 groups of measuring data, using extend SD card toextned unlimited memory; (SR220 only) ΔBuilt-in remote control module, can take measurments romotely; (SR220 only) ΔDesign of mechanical and elec trical integration is adopted to achieve small bulk, light weightand easy usage; ΔCan be connec ted to Bluetooth micro printer to print all parameters and graphs; (SR220 only) ΔBuilt-in standard micro-USB inter face enables communication with PC; (SR220 only) ΔAutomatic switch off, memor y and various prompt instruc tions (SR220 only) SpecificationsModelSR220Measuring rangeZ Axis (Vertical)320μm (Ra=80μm)X Axis (Horizontal)17.5mmResolutionZ Axis (Vertical)0.01μm/±20μm0.02μm/±40μm0.04μm/±80μm0.08μm/±160μmMeasurement itemParametersRa, Rq, Rz, Rt, Rp, Rv, RS, RSm, Rz(JIS), Ry(JIS), RSk, R3z,Rmax, Rpc, Rmr, Rku, RΔa, RΔq, Rδc, Ry, Rk, Rpk, Rvk,Mr1, Mr2, A1, A2, V0;StandardsISO, ANSI, DIN, JISGraphicRoughness profile, Material ratio curve, Direct profileFilterRC, PC-RC, Gauss, D-PSampling length (lr)0.25 / 0.8 / 2.5mmAssessment length (ln)Ln= lr×n n=1~5ProbeprincipleDifferential inductanceStylusNatural Diamond, 90° cone angle, 5μm tip radiusForce<4mNSkidRuby, Longitudinal radius 40mmTraversing speedlr=0.25, Vt=0.15mm/slr=0.8, Vt=0. 5mm/slr=2. 5, Vt=1mm/sReturn Vt=1mm/sAccuracyLess than or equal to ±10%RepeatabilityLess than or equal to 6%Power supplyBuilt-in Lithium ion battery, AC adapter 8.4V, 800mADimension112×50×47mm (L×W×H)Weightapproximately 360g