CNYST KR220 Surface Roughness Tester Instruction Manual

KR220 Surface Roughness Tester

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Specifications

• Measurement Range: 160m

• Parameters: Ra, Rz, Rq, Rt, Rp, Rv, R3z, R3y, Rz(JIS), Rs, Rsk,
  Rsm, Rku, Rmr

• Integration Design: Electromechanical integration design

• Data Processing: DSP chip control

• Connectivity: Computer and printer connectivity

• Optional Accessories: Curved surface pickup sensor, holes
  sensors, measurement stand, Sheath of sensor, extension rod,
  printer, analysis software

Product Usage Instructions

Preparation for Measurement

Ensure the roughness tester is placed on a stable surface.
Connect any optional sensors or accessories if needed.

Turning On/Off

To turn on the device, press the power button. To turn off,
press and hold the power button until the device powers down.

Stylus Position

Position the stylus at the starting point of the surface to be
measured.

Start Measurement

Press the measurement start button to begin the measurement
process.

Measurement Result Display

View the measurement results displayed on the screen after the
measurement is complete.

Print Measurement Results

If required, connect the roughness tester to a printer and
follow the instructions to print the measurement results.

Storage Measurement Results

To store measurement results, follow the storage management
procedures outlined in the user manual.

Measuring Parameter Settings

Adjust measuring parameters as needed using the settings menu on
the device.

Frequently Asked Questions (FAQ)

Q: Can I measure roughness on curved surfaces with this

tester?

A: Yes, the roughness tester comes with an optional curved
surface pickup sensor for measuring on curved surfaces.

Q: How do I calibrate the measuring parameters?

A: Refer to the user manual for instructions on calibrating the
measuring parameters using the parameter calibration feature.

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CONTENT 1 ROUGHNESS TESTER OVERVIEW …………………………………………………………………………………………. 3 1.1 FEATURES OF INSTRUMENT …………………………………………………………………………………………………………… 3 1.2 MEASUREMENT PRINCIPLE ……………………………………………………………………………………………………………. 3 1.3 NAME OF EACH PART ………………………………………………………………………………………………………………….. 4 1.4 BUTTONS DEFINE ………………………………………………………………………………………………………………………….6 1.5 BATTERY CHARGING ……………………………………………………………………………………………………………………. 6 1.6 CONNECTION METHOD OF SENSOR AND MAIN UNIT ………………………………………………………………………. 7
2 MEASURING OPERATION …………………………………………………………………………………………………………8 2.1 PREPARATION FOR MEASUREMENT ………………………………………………………………………………….. 8
2.2 TURNING ON/OFF ………………………………………………………………………………………………………………….. 8
2.3 STYLUS POSITION …………………………………………………………………………………………………………………. 9
2.4 START MEASUREMENT ………………………………………………………………………………………………………… 9
2.5 MEASUREMENT RESULT DISPLAY ……………………………………………………………………………………..10
2.6 PRINT MEASUREMENT RESULTS ………………………………………………………………………………………. 10
2.7 STORAGE MEASUREMENT RESULTS ………………………………………………………………………………… 11
2.8 MEASURING PARAMETER SETTINGS ……………………………………………………………………………….. 11
2.9 STORAGE MANAGEMENT ……………………………………………………………………………………………………12
2.10 DATE SETTINGS ………………………………………………………………………………………………………………… 14
2.11 SOFTWARE INFORMATION ………………………………………………………………………………………………… 14
2.12 PARAMETER CALIBRATION ………………………………………………………………………………………………. 15
2.13 PRINT SETUP ………………………………………………………………………………………………………………………… 16
3 OPTIONS AND USAGE …………………………………………………………………………………………………………….19 3.1 ADJUSTABLE SUPPORT ………………………………………………………………………………………………………………. 19 3.2 MEASUREMENT STAND ………………………………………………………………………………………………………………. 20 3.3 EXTENDING ROD ……………………………………………………………………………………………………………………….. 20 3.4 STANDARD SENSOR …………………………………………………………………………………………………………………… 20 3.5 CURVED SURFACE SENSOR …………………………………………………………………………………………………………..21
4 TECHNICAL PARAMETER AND FEATURES …………………………………………………………………………. 23 4.1 TECHNICAL PARAMETER …………………………………………………………………………………………………………….. 23 4.2 MEASURING RANGE …………………………………………………………………………………………………………………. 24
5 GENERAL MAINTENANCE …………………………………………………………………………………………………….. 24 5.1 SENSOR ……………………………………………………………………………………………………………………………………. 24 5.2 MAIN UNIT ………………………………………………………………………………………………………………………………. 24 5.3 BATTERY ……………………………………………………………………………………………………………………………………24 5.4 STANDARD SAMPLE PLATE …………………………………………………………………………………………………………25 5.5 TROUBLESHOOTING …………………………………………………………………………………………………………………..25
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6 REFERENCES …………………………………………………………………………………………………………………………. 26 6.1 TERMS …………………………………………………………………………………………………………………………………….. 26 6.1.1 Terms …………………………………………………………………………………………………………………………………………. 26 6.1.2 Traversing Length ………………………………………………………………………………………………………………………..26 6.2 PARAMETERS DEFINITIONS ………………………………………………………………………………………………………..27 6.3 RECOMMENDED TABLE OF THE SAMPLING LENGTH ……………………………………………………………………..29
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1 Roughness tester overview
The surfaces roughness tester is suitable for shop floor use and mobile measure to need of a small handheld instrument, it operation simple, function overall, measure fast, accuracy stability, take convenience. This tester applies to production site and can be used to measure surface roughness of various machinery-processed parts.This tester is capable of evaluating sueface textures with a variety of parameters according to various national standards and international standard.The measurement results are displayed digital/graphically on the OLED,and output to the printer.
1.1 Features of instrument
Electromechanical integration design, small size, light weight, easy to operation; DSP chip control and data processing, high speed, low power consumption; 160m Large measurement range; 20 parameters:Ra,Rz,Rq,Rt,Rp,Rv,R3z,R3y,Rz(JIS),Rs,Rsk,Rsm,Rku,Rmr;
Ry; RmaxRPcRkRpkRvkMr1Mr2 128 × 64 OLED dot matrix display, digital or graphic highlight display; no viewing angle; Display full information, intuitive and graphical displays all parameters; Compatible with ISO1997, DIN, ANSI, JIS2001 multiple national standards; 4 Profile Filter: Gauss RC PC-RC DP Built-in lithium-ion rechargeable battery and control circuit, high capacity, no memory effect; There are remaining charge indicator, charging hint; Tester has charging instructions, the operator can readily understand the level of charge Can work more than 20 hours while the power is enough; Large capacity data storage, can store 100 item of raw data and waveforms; Real-time clock setting and display for easy data recording and storage; With automatic sleep, automatic shutdown power-saving features; Reliable circuit and software design of prevent the motor stuck; Instrument can display a variety of information tips and instructions. For example Measurement
result display, the menu prompts and error messages; Metal case design, rugged, compact, portable, high reliability Can connected to the computer and printer All parameters can be printed or print any of the parameters which set by the user Optional curved surface pickup sensor, holes sensors, measurement stand, Sheath of sensor,
extension rod,printer and analysis software
1.2 Measurement principle
When measuring roughness of part surface, the pickup is placed on the surface of the part and then tracing the surface at constant rate. The pickup acquires the surface roughness by the sharp stylus in pickup. The roughness causes displacement of pickup which results in change of inductive value of induction coils thus generate analogue signal which is in proportion to surface roughness at output end of phase-sensitive rectifier. This signal enters data collection system after amplification and level conversion. After that, those collected data are processed with digital filtering and parameter calculation by DSP chip and the measuring result can be read on OLED, printed through printer and communicated with PC.
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1.3 Name of each part

Skid

Protective Tube

Stylus

Main Body

Socket

Sensor

Assess Sampling Length Length

Number

Battery indicator

Parameters

Range

Filter Unit

Display Interface

4

1.sensor 2.display 3 key area 4 adjustable support
5.USB charge 6.power switch 7 fixing hole
Power switch is a total power switch on the instrument. Turned off when not in use for a long time.
5

1.4 Buttons define

Power key: Press and hold 2 seconds On/Off tester Stylus position keys: For switching between stylus position display Start measurement key: Start the instrument to measuring mode Parameter selection Key: Used to view various parameters Record storage key/ print key: For storing and print the record results Up Arrow key: To select items for the switch Down arrow keys: Select the item for switching Menu / Enter key: To enter the menu settings Cancel / Exit key: Used to exit the menu and unset

1.5 Battery Charging

When battery voltage is too low (that is, battery voltage symbol display

on screen to

prompt low voltage), the instrument should be charged as soon as possible. USB port of the

instrument for charging. You can use the built-in power adapter for charging, you can also use

computer’s USB port for charging. If use the other power adapter for charging, the output voltage

should be 5V DC , the current should be greater than 800mA.

Instrument displays charging animation when charging after full animation ends, the display is

full of symbols. Charging time of 2.5 hours.

This instrument adopts lithium ion chargeable battery without memory effect and charging can

be fulfilled at any time without affecting normal operation of the instrument.

When charging, ensure that the instrument side of the power switch is in the ON position

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1.6 Connection method of sensor and main unit

protective tube

main body

main body
protective tube

sensor socket

Installation and Removing of sensor
For installation, hold the main body of sensor with hand, push it into connection adapter at the bottom of the instrument as shown in Figure and then slightly pushed it to the end of the sheath. To remove, hold the main body of pickup or the root of protective sheath with hand and slowly pull it out.
1Stylus of pickup is key part of this tester and great attention.should be paid to it. 2During installation and unloading, the stylus should not be touched in order.
to avoid damage and affecting measurement. 3Connection of sensor should be reliable during installation.
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2 Measuring Operation
2.1 Preparation for Measurement
Switch-on to check if battery voltage is normal; Clear the surface of part to be measured; Place the instrument correctly, stably and reliably on the surface to be measured; Trace of the pickup must be vertical to the direction of process line of the measured surface.

: Correct and standard operation is the premise for accurate measurement result, please make sure to follow it.

2.2 Turning On/Off

Assess Sampling Length Length

Number

Battery indicator

Press the key

to hold 2 seconds

after the instrument will automatically boot, boot will display equipment type, name and manufacturer information, and then enter the basic measurement status main display interface, as shown.

Introductions

Range

Filter Unit

1. The next boot will be displayed when the

last shutdown set content

2. Startup and shutdown, press and hold the key for about 2 seconds to open the instrument will

perform the appropriate action

3. Long time not to use, the instrument should be on the side of the power switch turned off

4. Start measuring sensor is installed, please refer to the stylus position, try to adjust the stylus

cursor position to the best position “0”

8

2.3 Stylus Position

First, use the stylus position to determine the location of the sensor. The stylus as measured in the middle position. In the main interface mode, press the stylus

position key

switches stylus position

display screen and the main display screen.

2.4 Start measurement

In the main interface mode, press the Start button to start measuring

Motor Detect… ESC:stop Testing… ESC:stop

9

2.5 Measurement result display
After the measurement, can be observed in Figure shows the results of all measurements.

Roughness Ra= 1.598m Rz= 3.016m Rq= 1.768m
Roughness Rt= 6.236m Rp= 3.298m Rv= 3.012m R3z= 6.168m R3y= 6.238m RzJIS= 5.08m Rsk= -0.11 Rku= 0.96 Rsm= 0.08mm

C(Rt) Rmr

0

5% 4.1%

10% 5.1%

15% 6.5%

20% 10.3% C(Rt) 100%

Rmr 100%

C(Rt) Rmr

0

25% 4.1%

30% 5.1%

35% 6.5%

40% 10.3% C(Rt) 100%

Rmr 100%

C(Rt) Rmr

0

75% 4.1%

80% 5.1%

95% 6.5%

100% 10.3%

C(Rt) 100%

Rmr 100%

2.6 Print measurement results

The instrument can be connected to the printer The measurement results will be printed.

After measurement, Press display the measurement results.

key to

Press

key to print the measured data

to a serial printer. At this point,

key is

a print key to use.

The instrument can be tested according to the

actual requirements of arbitrary parameters

choose to print or print all the parameters, how

to set the parameters, refer to “Print Settings.”

Roughness Ra= 1.598m Rz= 4.275m Rq= 1691m

C(Rt) Rmr

0

5% 4.1%

10% 5.1%

15% 6.5%

20% 10.3%

C(Rt) 100%

Rmr 100%

**** Surface Roughness Tester **** 2013.04.18 11:05:08 Ln = 0.8mmX5 Range = 40um Filter = GAUSS

Ra = 1.598um Rz = 4.275um Rq = 1.691um Rt = 5.113um Rp = 1.966um Rv = 2.309um Rs = 0.08mm R3z = 3.853um R3y = 4.059um RzJIS = 3.901um Rsk = -0.16 Rku = 1.18 Rsm = 0.08mm

0

100% Rmr

100%C(Rt)
C(Rt) 10% 20% 30% 40% 50% 60% 70% 80% 90%

Rmr 7.2% 41.8% 49.8% 52.1% 54.2% 55.9% 58.6% 66.5% 96.6%

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2.7 Storage measurement results

In the main display interface mode, press the

key to save the measurement results stored

in the instrument memory. Instrument built-in large capacity memory, can store 100 groups of raw

data and waveform data.

Data storage recording date and time the file name automatically generated according to the last

data record is always stored the most recent recording time, the last data record stored recording

record number will be 001.

Saving…

2.8 Measuring parameter Settings

In the basic measurement mode, press the

key to enter the menu operation state, press the

keys to select “Preferences” function, then press the

key to enter the

parameter setting mode. In the parameter setting mode, you can modify all the measurement

conditions.

Menu
1.Parameter
2.Recoder
3.Date

Parameter c

Content 0.8mm 0.25 0.8

c

5

1-5

RANGE ±40 ±20±40±80

FILTER GAUSS

DISPLAY Ra

UNIT

m

m in

LANGUAGE ENG ENG CHS

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2.9 Storage Management

In the basic measurement mode, press the

key to enter the menu operation state, Press the

projects.

keys to select “Recoder” function, Press the

key to enter management

Menu 1.Parameter 2.Recoder 3.Date

Recoder 1.View 2.Format

Recoder management by the two project components, 1 view Selected item and press the Enter key to enter.
2.9.1 View Record

2 format.

Recoder
001 2013.05.08 09:08 002 2013.05.08 09:07 003 2013.05.08 09:05 004 2013.05.08 09:03 005 2013.05.08 09:01

Recoder
006 2013.05.06 08:08 007 2013.05.06 08:06 008 2013.05.06 08:05 009 2013.05.06 08:02 010 2013.05.01 08:08

Item Up Item Down

Page Up Page Down

Select the appropriate records, press

View log content

In view records content, the following figure.

data can be printed according to the specified printer, operate

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2013.05.06 08:0816
Ra= 1.598m Rz= 3.016m Rq= 1.768m

C(Rt) Rmr

0

5% 4.1%

10% 5.1%

15% 6.5%

20% 10.3%

C(Rt) 100%

Rmr 100%

0.8mmx5 ±40m GAUSS Rt= 6.236m Rp= 3.298m Rv= 3.012m R3z= 6.168m R3y= 6.238m RzJIS= 5.08m Rsk= -0.11 Rku= 0.96 Rsm= 0.08mm

C(Rt) Rmr

0

25% 4.1%

30% 5.1%

35% 6.5%

40% 10.3%

C(Rt) 100%

Rmr 100%

C(Rt) Rmr

0

75% 4.1%

80% 5.1%

95% 6.5%

100% 10.3%

C(Rt) 100%

Rmr 100%

Print

**** Surface Roughness Tester **** 2013.04.18 11:05:08 Ln = 0.8mmX5 Range = 40um Filter = GAUSS

Ra = 1.598um Rz = 4.275um Rq = 1.691um Rt = 5.113um Rp = 1.966um Rv = 2.309um Rs = 0.08mm R3z = 3.853um R3y = 4.059um RzJIS = 3.901um Rsk = -0.16 Rku = 1.18 Rsm = 0.08mm

0

100% Rmr

100%C(Rt)
C(Rt) 10% 20% 30% 40% 50% 60% 70% 80% 90%

Rmr 7.2% 41.8% 49.8% 52.1% 54.2% 55.9% 58.6% 66.5% 96.6%

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2.9.2 Format

Data format is the deletion of data records, once formatted and all data will be cleared. In the data before formatting instrument has confirmation prompt information, user data will not be restored after confirmation.

Recoder 1.View 2.Format

Farmat Are you sure?

Format… Do not Shutdown Power

2.10 Date Settings
Built-in real time clock calendar instrument used to record information about the test of time to adjust date and time as follows

Menu 1.Parameter 2.Recoder 3.Date

Date

2013.05.08

09:01:18

Up: + Down:-

:Change

:Back

2.11 Software Information

Instruments software and hardware information can help users easily upgrade and maintain the product, unique serial number of the instrument software information items are displayed.

Menu 4.Calibrate 5.Print 6.About

About SN:K00113061718 Version V1.0 RoughnessTester

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2.12 Parameter calibration
Before measuring instrument, usually required calibration use standard calibration. Block.The instrument is configured with a standard calibation block, before measurement, instruments to test the block. Under normal circumstances, when the measured value and the block value of the difference in the acceptable range, the measurement value is valid, can be measured directly. If the measured value and the block value of the difference is greater than a accuracy error range of the instrument, or the user require high accuracy, can be used to correct the indication calibration function and improve measurement accuracy. Showing the value of the calibration procedure as shown. Illustration is based on a model calibrated 1.63 m steps to calibrate the model for the actual calibration of the nominal value of the set value.

Menu 4.Calibrate 5.Print 6.About
Calibrate
Ra= 1.51m
Calibrate
Ra= 1.63m
Calibrate…
ESC: Stop
Calibrate
Ra= 1.63m
Menu 4.Calibrate 5.Print 6.About

1 Under normal circumstances, the instrument in the factory have been rigorously tested, showing error is much less than ± 10%, in this case, the user is not showing the value of the calibration frequently used functions.

2 After setting the calibration value, you must press the

key for a full

measurement, instrument calibration to be valid. 3 New parameters after calibration must be carried out once a complete measurement and

press the

key is stored in the instrument.

4 Press “ESC”key to return the menu without saving calibration results.

15

2.13 Print setup

The instrument can be tested according to the actual requirements of any parameter selection Print or Print All, the steps shown in Figure.

2.14 Rpc setting
According to user’s demand, Rpc-parameter’s calculation can be selected from “m” and “%”. Enter menu”Parameter Set”,select
item in “Rpc BW sel”,input relevant value in “Rpc BW Set”
2.15 Dataview of software
Dataview of software can easily be waveform analysis and print measurement results uploaded to the PC machine
.

Menu 4.Calibrate 5.Print 6.About

Print

1.Ra

OK

2.Rz

OK

3.Rq

OK

Print

4.Rt

OK

2.Rz

OK

14.Rmr

Menu 4.Calibrate 5.Print 6.About

16

17

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3 Options and Usage 3.1 Adjustable support
When measured surface of part is smaller than the bottom surface of the instrument, sheath of pickup and adjustable supporter of instrument options can be used for auxiliary support to complete the measurement (as shown in Figure).
Adjustable Support
1.the value L above shall not be shorter than driving stroke of this measurement to prevent pickup from dropping out of part during measurement. 2. Locking of adjustable supporter shall be reliable
19

3.2 Measurement Stand
Measurement Stand can adjust the positions between tester and measured part conveniently with flexible and stable operation and wider application range. Roughness of complex shapes can also be measured. Measurement stand enable the adjustment of the position of stylus to be more precise and measurement to be more stable. If Ra value of measured surface is relatively low, Using measurement platform is recommended.

3.3 Extending Rod
Extending rod increases the depth for pickup to enter the part. Length of extending rod is 50mm.

Sensor

Extending Rod

3.4 Standard Sensor
Most of the standard sensor sensor, it can measure most of the plane, inclined plane, cone surface, inner hole, groove and other surface roughness, can be hand-held measurement, in addition to the standard sensor, other special sensors are needed to measure the measuring platform.
20

Protective Tube

Socket Main Body

Stylus Skid

3.5 Curved Surface Sensor
Curved surface sensor is mainly used for measuring radius is larger than the smooth cylindrical 3mm surface roughness, for the larger radius smooth spherical surface and other surface also can obtain good approximation, the radius of curvature, the surface is smooth, the better the effect of measurement.

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3.6 pinhole sensor
Using Pinhole pickup, the inner surfaces of holes with radius more than 2mm can be measured. Refer to the following Figure for detailed dimension.

Pinhole pickup
3.7 Deep Groove Sensor
With deep groove sensor, it is possible to measure groove with width wider than 3mm and depth deeper than 10mm, or the surface roughness of step with height less than 10mm, Also can used to measure the planar, cylindrical used with platform. please see figure for detailed dimension.
21.5 3.6

7 10 12 3.4

44

2.5 78.5

1.8

deep groove sensor

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4 Technical Parameter and Features

4.1 Technical Parameter

Name
The Z axis
Measurem (vertical) ent Range The X axis
(horizontal)

Resolution ratio

The Z axis (vertical)

Measureme nt item

Parameter

Standard

Graphic

Filter

The sampling length(lr) Assessment lengthln

Principle

Stylus

Force

Sensor

Skid

Traversing speed

Accuracy Repeatability Power supply Working Time Outline dimension L×W×H
Weight
working Environment

160m

Content

17.5mm

001m/±20m 002m/±40m 004m/±80m

Ra Rz Ry Rq Rt Rmax

Rp Rv R3z R3y Rz(JIS)

Rs Rsk Rku Rsm Rmr

RPcRkRpkRvkMr1Mr2

ISO,ANSI,DIN,JIS

Material ratio curve of the profile

RC,PC-RC,Gauss,D-P

0.25,0.8,2.5mm Ln= lr×n n=1~5

The displacement differential inductance

Natural Diamond, 90 cone angle, 5m tip radius

<4mN

RubyLongitudinal radius 40mm

lr=0.25, Vt=0.135mm/s

lr=0.8, Vt=0. 5mm/s

lr=2. 5, Vt=1mm/s

Return

Vt=1mm/s

No more than±10%

No more than 6%

Built-in 3.7VLithium ion batteryCharger :DC5V,800mA/3hour

More than 20 hours
141×55×40mm

About 400g

Temperature- 20 ~ 40

Humidity< 90% RH

Store and Transportation

Temperature- 40 ~ 60 Humidity< 90% RH

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4.2 Measuring Range
Parameter
Ra Rq Rz R3z Ry Rt Rp Rm
Sk
S Sm
tp

Measuring range 0.005m ~ 16m
0.02m ~ 160m
0 ~ 100% 1mm 0 ~ 100%

5 General Maintenance
5.1 Sensor
1. Any time swap sensors are to be especially careful, careful not to touch the guide head and a stylus, because this is a key part of the whole instrument, to try to hold the sensor guide head bracket roots (the front of the body) plug. 2. To complete the measurement work, please timely sensor into the box; 3. Please pay attention to protect the needle part measuring sensor. 4. The sensor’s precision components, any knock, touch, fall off phenomenon may damage the sensor, should try to avoid such situations. 5. The sensor is a damageable parts, do not belong to the scope of warranty parts, only provide repair. In order not to affect the measurement work, users are advised to buy backup sensor used for emergency.
5.2 Main Unit
1. Pay attention to maintaining the Main Unit surface clean, often with a soft dry cloth to clean its surface. 2. The instrument is a precision measuring instrument, should always be handled with care, to avoid the shock.
5.3 Battery
1. Always observe the battery prompt, when the low voltage, please charge.
24

2. The charging time is 3 hours, try not to long time charge.

5.4 Standard Sample Plate
1. The surface of a standard sample plate must be kept clean. 2. To avoid scratches on the surface of sample area.
5.5 Troubleshooting
When the tester breaks down, handle the troubles according to measures described on Fault Information. If troubles still exist, please return the instrument to factory for repair. Users should not dismantle and repair the device by themselves. Returned instrument should be accompanied with sample plate attached. Phenomenon of problem should be explained.

Error message
Motor error
Out of Range
No test data Measurement
Accuracy Out of Range

Cause
Motor stuck 1. The measured surface signal exceeding the measurement range

Solutions method
Reboot
Increase Measuring range

2. Placed away from the center of the stylus position After the boot does not measure.
Set the parameter error Calibration data error

Adjust the Stylus position
The actual measurement: one time
Set the parameter measurement
Calibrate the tester

25

6 References

6.1 Terms
The instrument calculat parameters on the filter profile and the direct profile , all calculated in line with the GB / T 3505-2000 “Geometrical Product Specification(GPS) —- Surface texture: Profile method—-Term,definitions and surface texture parameters.”
6.1.1 Terms
Filtered profile: profile signal after primary profile is filtered to remove waviness. D-P (direct-profile): adopt central line of Least Square Algorithm. RC filter: analogue 2RC filter with phase difference. PC-RC filter: RC filter with phase-correction. Gauss filter: ISO11562.
6.1.2 Traversing Length

RC Filter

Approach

travel 0.5mm

Pre-travel 2lr

Assessment length lr ×n

Origin
GAUSS Filter
Approach travel Pre-trave 0.5mm lr/2

Traversing length
Assessment length lr ×n

end
Post-travel lr/2

Traversing length

Origin

end

26

PCRC Filter

Approach

travel Pre-travel

0.5mm

lr

Assessment length lr ×n

Post-travel lr

Traversing length

Origin

end

D-P direct profile
Approaching Distance 0.5mm

Evaluating length l ×n

Tracing Distance Start
6.2 Parameters Definitions

End of Normal Tracing

6.2.1 Arithmetical Mean Deviation of Profile Ra

Ra is arithmetic mean of the absolute values of profile deviation Zxfrom mean within sampling length.

Ra

1 l
l0

Z x dx

Z2 Z1

Zi

Zn

6.2.2 Root-mean-square Deviation of Profile Rq
Rq is the square root of the arithmetic mean of the squares of profile deviation Z(x) from mean within sampling length.
27

Zv6 Zp6

Zp3 Zp4
Zp5

Zv2 Zp2
Zv3

Rz Zp1
Zv1

Zv4 Zv5

Rq 1 l Z 2 xdx
l0 6.2.3 Maximum Height of Profile Rz
Rz is The sum of height Zp of the highest profile peak from the mean line and depth Zv of the deepest profile valley from the mean line within sampling length
Rz Zv1
6.2.4 Total Peak-to-valley Height Rt
Rt is the sum of the height of the highest peak Zp and the depth of the deepest valley Zv over the evaluation length.
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6.3 Recommended table of the sampling length

Ra (µm)
510 2.55

Rz (µm)
2040 1020

Sample length
2.5

1.252.5 6.310

0.631.25 3.26.3

0.8

0.320.63 1.63.2

0.250.32 1.251.6

0.200.25 1.01.25

0.160.20 0.81.0

0.1250.16 0.630.8

0.10.125 0.50.63

0.080.1 0.40.5 0.0630.08 0.320.4 0.050.063 0.250.32 0.040.05 0.20.25

0.25

0.0320.04 0.160.2

0.0250.032 0.1250.16

0.020.025 0.10.125

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The configuration list of Instrument

Number Name

Quantity Remarks

1 Main Unit

1

2 Sensor

1

Precision parts

3 Adjustable Support

1

4 calibration block

1

5 block bracket

1

6 Charger

1

7 USB charging cable

1

8 operating manual

1

9 certificate

1

10 guarantee card

1

11 Instrument container

1

12

13

14 thermal printer

Optional accessories

15

30

Surface Roughness Tester
Instruction manual
31

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