Bms Bulut Makina SR210 User manual

Surface Roughness Tester
SR210
BMS Bulut Makina Sanayi ve Ticaret Ltd. Şti.
Kocaeli KOBİ OSB Köseler Mahallesi,
6. Cadde No: 20/2 Dilovası / KOCAELİ / TURKEY
Phone: [phone]
Web: www.bulutmak.com e-mail: [e-mail]
OPERATION MANUAL

2
1OVERVIEW .......................................................................................................................................................................... 4
1.1 MEASUREMENT PRINCIPLE......................................................................................................................................................... 4
1.2 STANDARD PACKAGE ................................................................................................................................................................. 5
1.3 LAYOUT OF THE INSTRUMENT...................................................................................................................................................... 5
1.3.1 Main unit..................................................................................................................................................................... 5
1.3.2 Probe ........................................................................................................................................................................... 5
1.3.3 Display......................................................................................................................................................................... 6
1.3.4 Function of key ............................................................................................................................................................ 6
1.4 BASIC CONNECTION METHOD...................................................................................................................................................... 6
1.4.1 Assembling and dis-assembling of the probe.............................................................................................................. 6
1.4.2 Charger and battery charging ..................................................................................................................................... 7
2MEASUREMENT OPERATION............................................................................................................................................... 7
2.1 PREPARATION BEFORE MEASUREMENT.......................................................................................................................................... 7
2.2 SWITCH ON ............................................................................................................................................................................. 7
2.3 MEASUREMENT CONDITIONS MODIFICATION ................................................................................................................................ 8
2.3.1 Sampling length .......................................................................................................................................................... 8
2.3.2 Measurement Range................................................................................................................................................... 9
2.3.3 Filter ............................................................................................................................................................................ 9
2.3.4 Parameter ................................................................................................................................................................... 9
2.4 SYSTEM SETTING.................................................................................................................................................................... 10
2.4.1 Unit system................................................................................................................................................................ 10
2.4.2 LCD Back-light ........................................................................................................................................................... 10
2.5 FUNCTION SELECTION ............................................................................................................................................................. 10
2.5.1 Stylus position ........................................................................................................................................................... 10
2.5.2 Calibration of indicating value .................................................................................................................................. 10
3OPTIONAL ACCESSORIES AND THE APPLICATION .............................................................................................................. 11
3.1 HEIGHT SUPPORT AND PROBE HOLDER........................................................................................................................................ 11
3.2 HEIGHT STAND....................................................................................................................................................................... 12
3.3 EXTENSION ROD..................................................................................................................................................................... 12
3.4 PROBE ................................................................................................................................................................................. 12
3.4.1 General purpose probe.............................................................................................................................................. 12
3.4.2 Curved surface probe ................................................................................................................................................ 12
3.4.3 Small bore probe ....................................................................................................................................................... 13
3.4.4 Super small bore probe ............................................................................................................................................. 13
4TECHNICAL PARAMETERS.................................................................................................................................................. 13
4.1 ROUGHNESS PARAMETER AND DISPLAY RANGE.............................................................................................................................. 14
4.2 TEMPERATURE/HUMIDITY RANGE .............................................................................................................................................. 14
4.3 CONNECTION WITH PRINTER..................................................................................................................................................... 14
5DAILY CARE AND MAINTENANCE ...................................................................................................................................... 14
5.1 FAULT TREATMENT.................................................................................................................................................................. 14
5.2 FAULT MESSAGE ..................................................................................................................................................................... 14
6BATTERY ON/OFF SWITCH................................................................................................................................................. 14
7REFERENCES...................................................................................................................................................................... 15
7.1 PROFILE AND FILTER ................................................................................................................................................................ 15

3
7.1.1 Profile ........................................................................................................................................................................ 15
7.1.2 Filter .......................................................................................................................................................................... 15
7.2 PARAMETERS DEFINITIONS ....................................................................................................................................................... 17
7.2.1 Arithmetic Mean Deviation of Profile Ra................................................................................................................... 17
7.2.2 Root-mean-square Deviation of Profile Rq................................................................................................................ 17
7.2.3 Maximum height of the profile Rz............................................................................................................................. 17
7.2.4 Total Peak-to-valley Height Rt ................................................................................................................................... 18
8SAMPLING LENGTH SELECTION RECOMMENDATION FORM .............................................................................................. 18

4
1 Overview
SR210 surface roughness measurement instrument is a mini-type hand-held instrument which is suitable for fast
measure requirement on production site. It has the features of easy operation, fast measurement, stable precision, and
convenient take along. It can calculate relevant parameter according to selected measurement condition, and display
clearly on LCD.
All parameter from this instrument conform to GB/T 3505-2000 Geometrical Product Specification Surface Structure
Profile Method Surface Structure's Predication, Definition, and Parameter.
Features:
Measurement parameter: Ra, Rz, Rq, Rt;
High precision inductive probe;
RC, PC- RC, GAUSS, D-P 4 kinds of filtering;
conform to ISO and GB standard;
Segment code LCD, very clear display;
Use ARM chip to control and process data, with fast speed and low power dissipation;
Built-in Li-polymer rechargeable battery and protective circuit. No memory effect, short charging time, long continuous
working hour;
Mechatronics design with small dimension and light weight, easy to carry;
Auto power-off function can save battery;
Optional measurement platform, small bore probe, curved surface probe, extension rod and other accessories.
1.1 Measurement Principle
When measuring the work piece surface roughness, please put the probe on the test surface of work piece. The internal
actuating device of the instrument would make the probe sliding along the test surface at constant speed. The probe
would feel the roughness of test surface through built-in sharp stylus. At this time the roughness of work piece test
surface would make the stylus move. This displacement would change the inductance value of the probe inductance
coils, thereby would generate analog signal which is proportional with the test surface roughness on the output end of
phase-sensitive rectifier. This signal would enter into data collection system after enlargement and level translation.
ARM chip would carry out digital filtering and parameter calculation for the collected data, the measurement result would
display on the LCD.

5
1.2 Standard Package
Description
Picture
Description
Picture
Main unit
Height support
General purpose
probe
Calibrate specimen
Probe holder
Calibrate specimen
holder
Screw driver
Charger
1.3 Layout of the instrument
1.3.1 Main unit
1.3.2 Probe

6
1.3.3 Display
1.3.4 Function of key
Start key: press one time to make the probe sliding, and then finish one measurement.
Parameter key: press one time, change one parameter.
Filter/Metric & British/ Up Arrow (Filter): press one time, change one filter; Long press can change Metric
and British System; Use as up arrow on other functions.
Stylus position/ down arrow: press one time to show stylus position, press again then drop out. Use as down
arrow on other functions.
Back-light key: Press one time, back-light turn on; press again, back-light turn off.
Sampling length (lr): Press one time change one sampling length value.
Measurement range change/Indicating value calibration (Range): Press one time change one
measurement range; long press enter into indicating value calibration process.
1.4 Basic connection method
1.4.1 Assembling and dis-assembling of the probe
As shown in the figure, hold the connection part of top guide tray and probe main body (stylus is downward), plug in the
mainframe's connecting socket according to the figure connecting line direction, press lightly to the end till stable
connection. When taking out, please disconnect probe from connecting socket, then take the probe out from drive slowly.
All the operation process should be careful to avoid probe breakage.
Assembling and dis-assembling of the probe

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Note: 1. Probe stylus is the key accessory of this instrument, please pay high attention to it when using.
2. During the process of probe assembling and dis-assembling, please do not touch the stylus to avoid breakage
which would affect the measurement.
3. During the process of probe assembling, please make sure that the connection is reliable.
1.4.2 Charger and battery charging
If the instrument LCD's battery symbol remind low voltage or the instrument could not start up, then please charge the
instrument. When charging, please connect the charger with 220V/50Hz main supply, then insert the charger's plug into
the micro USB socket of the back side of mainframe. During charging, the red light means it is charging; the green light
means it is full charged, and can blackout. The whole charging time is about 3-4 hours, cannot charge too long. The
input voltage of charger is 100~240V,50/60Hz DC, and maximum current is 0.2A; Output voltage is 5V DC, maximum
charging current is about 500mAH.This instrument uses Li-polymer battery, no memory effect, can charge any time. The
instrument can work properly when charging.
Note: 1.If measure on charging station, please make sure that the connecting cable's place would not affect the
measurement operation.
2.Please charge as soon as possible during the low voltage situation, and cut off power as soon as possible after
full charge.
3.The battery switch is off when the instrument leave factory.
4.If the instrument work in-properly, and turn off / turn on the machine cannot help to solve the problem, then
please turn off the battery switch of the instrument backside, and restart after 10seconds.
2 Measurement Operation
2.1 Preparation before measurement
a. Please check if the battery voltage is regular or not after start up the instrument.
b. Clean testing surface of the work-piece with soft cleaning cloth;
c. Please make sure that the probe's glide track is perpendicular to the processed texture direction of work-piece's
testing surface.
d. Instrument mainframe and probe main-body shall keep parallel with the testing surface during the measurement.
e. Please keep far away from the external environment such as shaking, magnetic field, and wind which would affect
the measurement result during measurement.
Measurement direction
Instruction: Correct and normative operation is the precondition to obtain precise measurement.
2.2 Switch on
After turn on the instrument, the LCD would automatically indicate the default setup parameter, unit, filter, measurement
range, sampling length, and stylus position, as shown in the following figure:
Instruction:1.The displayed content of LCD after first starting up is the factory settings of this instrument. On the next
starting up, the LCD would display the setup content and measurement date of user before last turn off.
2. Please observe the stylus's position after probe assembling and before measurement, the stylus should be near
to "0" position.

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Starting up display
Press Start key to start measurement, probe would slide on the measured surface. If LCD's sampling symbol"----"
indicates step-by-step according to the process dynamic condition of probe, then it means the instrument probe is
collecting signal (As shown in the left down figure) ; If the sampling symbol"----" changes very fast, then it means the
sampling is finished, and it is calculating filter and parameter (As shown in the right down figure) . The measurement
result would display on LCD after measurement (As shown in the starting up display figure). Except power key, all other
keys are invalid during measurement situation.
Probe is sliding Probe gets back
Note: If the instrument is turned off by accidental touch of power key during measurement situation, the instrument
probe would turn back to initial position after restarting up. Please do not carry out any operation to instrument
probe during this time until the probe back to its last position.
2.3 Measurement Conditions Modification
2.3.1 Sampling length
After press the sampling length key (lr), the instrument can change periodically on the 3 sampling lengths of 0.25mm,
0.8mm, and 2.5mm until it select the required sampling length according to sampling length setup cursor of the LCD.
Select 0.25mm (Starting up tolerant measurement range ±40μm)
Select 0.8mm. Select 2.5mm.
Ra m
RC
0
+
-
±80±40±202.50.80.25
-
+
0
RC
m
Ra
0.25 0.8 2.5
±20±40±80
Ra m
RC
0
+
-
±80±40±202.50.80.25

9
2.3.2 Measurement Range
After press the measurement range key (Range), the instrument can change periodically on the 4 measurement
range of ±20µm, ±40µm, ±80µm, and ±160µm until it select the required measurement range according to
measurement range setup cursor of the LCD.
Select ±20µm. Select ±40µm. Select ±80µm.
When select ±160µm, the two cursors of ±20µm and ±40µm would display at the same time.
2.3.3 Filter
After press the filter key (Filter), the instrument can change periodically on the 4 filters of RC, PC-RC, Gauss, and D-P
until it select the required filter according to the filter indicating symbol of the LCD top place.
Select RC. Select PC-RC.
Select GAUSS. Select D-P.
2.3.4 Parameter
After press the parameter key (Ra), the instrument can change periodically on the 4 parameters of Ra, Rz, Rq, and Rt
until it select the required parameter according the display of the LCD.
Select Rz. Select Ra.
Ra m
RC
0
+
-
0.25 0.8 2.5
±20±40±80
-
+
0
RC
m
Ra
±80±40±202.50.80.25
-
+
0
RC
m
Ra
0.25 0.8 2.5
±20±40±80
Ra m
RC
0
+
-
±80±40±202.50.80.25
-
+
0
PC-RC
m
Ra
0.25 0.8 2.5
±20±40±80
-
+
0
GAUSS
m
Ra
±80±40±202.50.80.25
Ra m
D-P
0
+
-
0.25 0.8 2.5
±20±40±80
Ra m
RC
0
+
-
±80±40±202.50.80.25
Rz m
RC
0
+
-
0.25 0.8 2.5
±20±40±80

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Select Rq. Select Rt.
2.4 System Setting
2.4.1 Unit system
After long press of the filter/metric & inch/ up arrow (Filter), the instrument can change periodically between metric unit
and British unit until it select the required unit.
Select metric unit. Select British unit.
2.4.2 LCD Back-light
If the environment light is dark when operating the instrument, press back-light key can turn on the back-light; Press
again can turn off the back-light and save battery electric quantity.
2.5 Function Selection
2.5.1 Stylus position
Press stylus position key, the instrument will indicate the actual stylus position; Press again then drop out. If the stylus
position cursor is below 0 position, then it means that the actual stylus position is below balance point; If the stylus
position cursor is above 0 position, then it means that the actual stylus position is above balance point; At this time
please adjust the relative position of work piece and instrument, try to make sure that the stylus position is near to 0 so
as to obtain best measurement result. All measurements are valid unless the stylus position exceed the measurement
range. During the measurement process, please make sure that the probe main-body is parallel to the test surface
(visual inspection is enough). At this time all measurements are valid if the stylus position is within the measurement
range.
Stylus position
Proper and artful use of instrument accessories such as height support, height stand can help to adjust the stylus
position so as to obtain reliable measurement result.
2.5.2 Calibration of indicating value
Long press the measurement range/indicating value calibration key to enter into calibration mode. If the instrument LCD
top side has "CAL" symbol, then press up & down arrows can adjust the value. There will has "-" symbol before negative
numbers. Under the "CAL" situation, all setting value is percentage, Maximum and Minimum value is ±20%. Each
-
+
0
RC
m
Rq
±80±40±202.50.80.25
Rt
m
RC
0
+
-
0.25 0.8 2.5
±20±40±80
-
+
0
RC
m
Ra
±80±40±202.50.80.25
Ra
in
RC
0
+
-
0.25 0.8 2.5
±20±40±80
Ra m
RC
0
+
-
0.25 0.8 2.5
±20±40±80

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calibration value can only calibrate the selected measurement range. Under this situation, press measurement range
key (Range) can calibrate the indicating values respectively of different measurement ranges. Press the measurement
range/indicating value calibration key again after setup the calibration value to drop out indicating value calibration
situation, the "CAL" symbol would disappear, and could take normal measurement.
Means the calibration is carried according to 3% of actual deviation.
Means the calibration is carried according to -5% of actual deviation.
Instruction: 1. When testing model of the instrument by correct measurement method, if the actual measurement value
exceeds ±10% of the model calibration value, the indicating value calibration function can calibrate according to
the percentage of actual deviation, and the calibration range is no bigger than ±20%.
2. Usually all instruments would test strictly before leave factory, the indicating value deviation is much less than
±10%. According to above information, please do not use the indicating value calibration function frequently.
3. If the indicating value calibration value is set as "00", all setting calibration would remove, and the instrument
would come back to factory settings.
3 Optional accessories and the application
3.1 Height support and probe holder
If the test surface of the work piece is smaller than the under-surface of the instrument, please use the instrument
accessories such as probe holder and height support as auxiliary supporting so as to finish the measurement (As shown
in the below figure) .
The application of height support and probe holder
Note: 1. The bearing surface should not be smaller than the drive route of this measurement so as to avoid the
situation that probe falls away from the work piece when measuring, and stands up to the work piece when get
back.
2. The lock of height support should be reliable.
3. Please do not use height support to adjust stylus position when measuring. Please adjust the height of variable
stand bar to the required height before measurement. Usually measure through calipers can satisfy the
requirement.
-
+
0
CALRC
m
Ra
±80±40±202.50.80.25
Ra m
RC CAL
0
+
-
0.25 0.8 2.5
±20±40±80

12
3.2 Height stand
Using height stand can precisely adjust the position between instrument and test work piece. The operation would be
more reliable and stable, the application range would be larger, and it could measure the surface roughness of big size
accessories. When connecting with upright, it can precisely adjust the stylus position, and the measurement would be
more stable. Please use upright if the test surface Ra value is small. Please use upright if use professional probe such
as small bore probe, deep notch probe, and curved surface probe.
Height stand
3.3 Extension rod
Use extension rod can increase the depth which the probe enters into the work piece inside. The length of extension
rod is 50mm.
Extension rod
3.4 Probe
3.4.1 General purpose probe
3.4.2 Curved surface probe

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3.4.3 Small bore probe
3.4.4 Super small bore probe
4 Technical parameters

14
4.1 Roughness parameter and display range
Parameter
Display range
Ra
Rq
0.005μm ~ 16μm
Rz
Rt
0.02μm ~ 160μm
4.2 Temperature/humidity range
Working environment: temperature: 0℃~ 40℃
Humidity: < 90% RH
Storage and transportation environment: temperature: - 25℃~ 60℃
Humidity: < 90% RH
4.3 Connection with printer
All measurement parameters can be printed out if connect with professional printer. Printer is optional.
5 Daily care and maintenance
Please try to avoid the situations such as collision, strenuous vibration, heavy dust, humidity, greasy dirt, and strong
magnetic field;
Probe is the precision part of instrument, please maintain it carefully. Please put it back to packing box after each
measurement.
The standard model of the instrument should be protected carefully to avoid any misalignment of calibration
instrument after scratch.
5.1 Fault treatment
If there are any fault for the instrument, please process according to measures which stated on the following chapter of
fault message; please send it back to factory for repair if it still could not work properly. Please do not take down and
repair by yourselves. Please attach the warranty card and standard model of the instrument together with the instrument
which need repair, also please explain the fault phenomenon.
5.2 Fault message
Fault display
Reason
E01
Hardware circuit fault
E11
Exceeds measurement range
E12
Electrical machine fault
E13
Probe dropping out process
E14
Please set up on upper machine
6 Battery ON/OFF switch
As shown in the following figure, the switch on the instrument backside is the battery ON/OFF switch.
Note: 1. Please turn off the battery switch if do not use for long time. This
can help to extend the working life of battery.
2. When the instrument leave factory, the battery ON/OFF switch is on OFF position.

15
7 References
7.1 Profile and filter
7.1.1 Profile
The instrument calculates the parameter on the basis of filtering profile and direct profile. All calculation conform to GB/T
3505-2000 Geometrical Product Specification Surface Structure Profile Method Surface Structure's Predication,
Definition, and Parameter.
Original profile: Only remove the noise profile from the collected profile signals.
Filtering profile: The profile which removed ripple from original profile through roughness filter.
Direct profile: The profile which only take minimum square law mid-court line calculation from original profile.
7.1.2 Filter
RC: It is the traditional two-level RC filter, and conform to old standard. Considering that some users are still using it,
so we keep it as transition. The input and output signal of this instrument has phase difference.
PC-RC: It is the filter which has taken digital phase correction on the basis of RC filter. It's amplitude transmission
feature is the same as RC filter. There is almost no phase difference. The amplitude parameters collected through RC
filter and PC-RC filter are same.
GAUSS (Gauss filter): It is the newest roughness filter. It conforms to GB/T18777-2002 GEOMETRICAL
PRODUCT SPECIFICATION SURFACE STRUCTURE PROFILE METHOD, THE METRO-LOGICAL CHARACTER OF
PHASE CORRECTION FILTER.
D-P: Direct profile.

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Traversing Length
The actual sliding length of this instrument probe is related to the selected filter and assessment length. Please refer to
following figures when using.
●RC Filter
●PC-RC Filter
●GAUSS Filter
Traversing length
Approach
Travel
0.5mm
Pre-travel
l
Assessment length
l ×n
Origin
End
Pre-travel
l
Assessment length
l ×n
Post-travel
l
Traversing length
Origin
End
Approach
travel
0.5mm
l=λc
l=λc
Pre-travel
lr/2
Post-travel
l/2
Traversing length
Origin
End
Approach
travel
0.5mm
Assessment length
l ×n
l=λc

17
●D-P direct profile
7.2 Parameters Definitions
7.2.1 Arithmetic Mean Deviation of Profile Ra
The arithmetic average value of the vertical coordinates' absolute value within one sampling length.


n
i
i
y
n
Ra
1
1
y
i
y
Ra
0 X
l
7.2.2 Root-mean-square Deviation of Profile Rq
The root-mean-square value of the vertical coordinate value within one sampling length.
2
1
1
2
1







n
i
i
y
n
Rq
7.2.3 Maximum height of the profile Rz
The sum height between maximum profile peak height Rp and maximum profile valley depth Rv within one sampling
length.
Approach
travel
0.5mm
Assessment length
l ×n
Traversing length
Origin
End

18
Y
Rp Rz
0 X
Rv
l
7.2.4 Total Peak-to-valley Height Rt
The sum height between maximum profile peak height and maximum profile valley depth within the assessment length.
8 Sampling length selection recommendation form
Ra (µm)
Rz (µm)
Sampling length (mm)
＞5～10
＞20～40
2.5
＞2.5～5
＞10～20
＞1.25～2.5
＞6.3～10
0.8
＞0.63～1.25
＞3.2～6.3
＞0.32～0.63
＞1.6～3.2
＞0.25～0.32
＞1.25～1.6
0.25
＞0.20～0.25
＞1.0～1.25
＞0.16～0.20
＞0.8～1.0
＞0.125～0.16
＞0.63～0.8
＞0.1～0.125
＞0.5～0.63
＞0.08～0.1
＞0.4～0.5
＞0.063～0.08
＞0.32～0.4
＞0.05～0.063
＞0.25～0.32
＞0.04～0.05
＞0.2～0.25
＞0.032～0.04
＞0.16～0.2
＞0.025～0.032
＞0.125～0.16
＞0.02～0.025
＞0.1～0.125