Model:SRT-6210
1.FEATURES
This instrument is compatible with four standards of 
 
 site to measure surface roughness of various 
machinery-processed parts, calculate corresponding
 
and clearly display all measurement parameters.
When measuring the roughness of a surface, the 
sensor is placed on the surface and then uniformly 
slides along the surface by driving the mechanism 
 
 by the sharp built-in probe. This roughness causes 
displacement of the probe which results in change of 
inductive amount of induction coils so as to generate 
analogue signal, which is in proportion to the surface 
roughness at output end of phase-sensitive rectifier. 
The exclusive DSP processes and calculates and then 
outputs the measurement results on LCD. 
* Multiple parameter measurement: Ra, Rz, Rq, Rt
* Highly sophisticated inductance sensor
* Four wave filtering methods : RC, PC-RC, 
   GAUSS and D-P
* Built-in lithium ion rechargeable battery and control 
   circuit with high capacity
* Small in size, light in weight and easy to use
* Can communicate with PC computer for statistics, 
   printing and analyzing by the optional cable and the 
   software for RS232C interface.
*Manual or automatic shut down. The tester can be  
   switched off  by pressing  the Power key at any time. 
   On the other hand, the tester will power itself off 
   about 5 minutes after the last  key operation.
*The tester can memorize 7 groups of measurement 
   results and measuring conditions for later use or 
   download to PC.
*Metric /Imperial Conversion
2.SPECIFICATIONS
Display: 4 digits, 10 mm LCD, with blue backlight
Parameters:  Ra, Rz, Rq, Rt
Measuring Range 
           Ra, Rq:  0.005-16.00um/0.020-629.9uinch
           Rz,Rt:   0.020-160.0um/0.078-6299uinch
Accuracy: Not more than ?0%
Fluctuation of display value: Not more than 6%
Sensor : 
         Test Principle: Inductance type
         Radius of Probe Pin: 5um
         Material of Probe Pin: Diamond
         Dynamo-measurement of Probe: 4mN(0.4gf)
         Probe Angle: 90?
         Vertical Radius of Guiding Head: 48mm
Maximum driving stroke:  17.5mm/0.7inch
Cutoff length (l): 0.25mm / 0.8mm / 2.5mm  optional
Evaluation length:  5l
Driving speed: 
         sampling length = 0.25mm   Vt=0.135mm/s
         sampling length = 0.8mm    Vt=0.5mm/s
         sampling length = 2.5mm    Vt=1mm/s
         returning                                Vt=1mm/s
Profile digital filter
         Filtered Profile:            RC
         Filtered Profile:            PC-RC
         Filtered Profile:            Gauss
         Non-Filtered Profile:        D-P
Resolution : .001μm    if reading <10μm                       0.01μm    if 10μm≤reading<100μm
                      0.1μm    if reading ≥100μm      
 Evaluation length : 5 cut-off
Power Li-ion battery: rechargeable
Operating conditions:  Temp. 0~50℃
                       Humidity <80% 
Size:140x57x48 mm  (5.5x2.2x1.9 inch)     
Weight: about 420 g