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SR200

Specifications subject to change

2.1

Chapter 2

Description

The SR200 is a portable, self-contained instrument for the

measurement of surface texture and is suitable for use in both the workshop and laboratory.
Parameters available for surface texture evaluation are:

Ra, Rz, Rt, Rp, Rmr, RPc, Rv, Rz1max, Rsk, Rda

An explanation of the surface texture parameters evaluated by this instrument is given in
Chapter 1.

The parameter evaluations and other functions of the instrument are microprocessor based.
The measurement results are displayed on an LCD screen and can be output to an optional
printer or computer for further evaluation.

The instrument is normally powered by an alkaline non-recharge-able battery. If preferred, an
optional power adaptor can be used

Figure 1

The Equipment

The standard SR200 includes:
• 1 Traverse unit
• 1 Standard Pickup
• 1 Reference Specimen

• 1 Pickup cable
• 1 Screwdriver
• 1 Battery

Note: certain items described in this handbook are optional and may not form part of your particular system.

Rapp Industrial Sales 724 789-7853

[email protected]

Содержание SR200

Страница 1: ...SR200 Surface Roughness Tester User Manual Rapp Industrial Sales 724 789 7853 sales rappindustrialsales com ...

Страница 2: ... 1 with a PC 4 3 The Equipment 2 1 SPC Mode 4 4 Traverse Unit 2 2 Language Settings 4 4 Pick up Mounting Components 2 3 Chapter 5 5 1 Mounting Bracket 2 3 Making Measurements Adjustable Support 2 4 Technical Considerations 5 1 Pick up holder 2 4 Operating Notes 5 1 Connector 2 4 On a horizontal surface 5 1 Pick up 2 5 On other surfaces 5 1 Mounting 2 6 Cut off 5 2 Chapter 3 Getting Started 3 1 Eva...

Страница 3: ...Chapter 6 Accessories 6 1 Chapter 7 Maintenance 7 1 Calibration 7 1 Reference Standard 7 1 Sensitivity Check and Adjustment 7 1 Cleaning the Stylus 7 1 Pick up Skid 7 1 Rapp Industrial Sales 724 789 7853 sales rappindustrialsales com ...

Страница 4: ...ine of nominal form fitted through the primary profile where the areas of the profile above and below this line are equal and kept to a minimum separation Profile filters as detailed in ISO11562 define the mean lines for the roughness and waviness profiles Cut off A cut off length or sampling length is a filter that uses either electronic 2CR or mathematical Gaussian means to remove or reduce unwa...

Страница 5: ...on of the roughness profile from the mean line within a sampling length When more than one sampling length is analysed rp is the mean value of the individual rp values for each sample RSm The mean spacing between profile peaks at the mean line measured within the sampling length A profile peak is the highest point of the profile between an upwards and downwards crossing of the mean line Rz Rz Rp R...

Страница 6: ...o it The count is determined only over the evaluation length though the results are given in peaks per cm or per inch Known as Pc before 1997 Rsk Skewness Rsk is a measure of the symmetry of the profile about the mean line This parameter indicates whether the spikes on the surface are predominately negative or positive or if the profile has an even distribution of peaks and valleys Rda R Delta a o...

Страница 7: ...nd other functions of the instrument are microprocessor based The measurement results are displayed on an LCD screen and can be output to an optional printer or computer for further evaluation The instrument is normally powered by an alkaline non recharge able battery If preferred an optional power adaptor can be used Figure 1 The Equipment The standard SR200 includes 1 Traverse unit 1 Standard Pi...

Страница 8: ...d or to a com puter for further analysis The unit also contains a drive motor which traverses the pickup across the surface to be measured The measuring stroke always starts from the extreme outward position At the end of the measurement the pickup returns to this position ready for the next measurement The traverse length is determined from selections of cut off or length Figure 2 Pick up Connect...

Страница 9: ...turned to angle the pick up or to take it off the centre line as shown in figure 3a It can also be mounted side ways on the drive shaft when the right angle pick up is in use Figure 3 pick up mounting Pick up Insert Extension rod here Clamp Drive Shaft Connector Adjustable Pick up Support Mounting Bracket Pick up Holder Mounting Bracket Clamp Screw Use this mounting position when the right angled ...

Страница 10: ...pick up depending on which way the holder is inserted into the support crutch It can also be used to position the pick up directly underneath the display unit as shown in figure 4 Figure 4 The holder will hold the pick up at right angles to the drive shaft when it is pivoted away from the surface eg while changing the work piece Connector The connector of the pick up lead is screwed into the end o...

Страница 11: ... are detected and con verted into a proportional electrical signal The radius of curvature of the skid is much greater than the roughness spacing This enables it to ride across the surface almost unaffected by the roughness and provide a datum representing the general form of the surface Even so where the waviness is widely spaced it will be necessary to use the pick up with shoe in conjunction wi...

Страница 12: ... surface the display traverse unit can be supported on its three feet If a user wishes to make his own mounting bracket for the unit the dimensions of the fixing holes are shown in figure 7 Figure 7 Rapp Industrial Sales 724 789 7853 sales rappindustrialsales com ...

Страница 13: ...nect the lead to the display traverse unit first and then the pick up To connect the pick up to the dis play traverse unit the pick up has 2 threaded ends with location pins Insert the location pin securely into the SR200 body and tighten the threaded collar Rotate the pick up to bring the stylus vertical this can conveniently be done with reference to the identity number engraved at the end of th...

Страница 14: ...ved the previously selected set up is lost When a battery has been replaced and the SCROLL key is pressed the start up message will display for 2 seconds and then the default settings are restored The default settings are Parameter Ra Cut off 0 8mm Evaluation length 4 0mm Range 100mm Data dump evaluation length 4 0mm Data dump range 100mm No parameter graph selected for printout Language English F...

Страница 15: ...the data dump is completed the dump menu still remains active From the displayed menu values of evaluation length and range can be changed and further measurements for data dump can be made see next chapter for further details Printing PRINT key pressing this key causes the evaluated measurement data to be output to the RS232 port When a printer is connected a printout of all the parameters select...

Страница 16: ...uired For a chart of default settings see Chapter 3 Cut Off To select the cut off required select the Cut off option from the main menu Press the SCROLL key to toggle through the cut off options until the required cut off is highlighted on the screen then press the SELECT key See chart in chapter 5 forfurther information Evaluation Length To select the evaluation length required select this option...

Страница 17: ...et and Exit The SELECT key will allow the alteration of one of the 2 settings or if Exit is highlighted will return to the main parameter selection screen Pressing SCROLL will step the cursor or highlighted character through the 3 decimal digits of the percentage then the sign and 3 decimal digits of the offset and then to OK Pressing SELECT will change the sign digit keep pressing SELECT until th...

Страница 18: ...0 1 deg 0 1 deg 0 1 deg Rsm 1 0µm 1 0µm 1 0µm Print Settings Allows selection of print options User can choose to print any combination of graph parameters and header information The scale of the graph can also be selected SCROLL through and press the SELECT key for each item required a tick will appear alongside the item Units Allows imperial or metric units to be selected Filter Allows filter op...

Страница 19: ...ing OK displays the Select language and select SPC mode screen Select the SPC Mode then SCROLL will toggle the mode between ON and OFF When SELECT is pressed with OK selected the previous screen will be shown again S PC ModeON OK Language Settings The default on the SR200 is English Language If the user wishes to select other languages press the PRINT and SCROLL key down simultaneously The followi...

Страница 20: ...t Language Select SPCmode Quit SCROLL down the options and SELECT Select Language English Français Deutsch Italiano OK SCROLL down the list of languages with and SELECT This selection will remain as the default unless power is lost eg battery is removed Rapp Industrial Sales 724 789 7853 sales rappindustrialsales com ...

Страница 21: ... display traverse unit 2 Clean the surface to be measured so that it is free from abrasive material grease suds etc This is necessary to ensure accurate readings and to reduce wear on the skid 3 Make the cut off length and parameter selections required 4 Position the display traverse unit and pick up so that the stylus contacts the surface and the pick up is approximately parallel to the surface M...

Страница 22: ... to 4 0 025 to 0 1 0 1 to 0 5 0 5 to 10 10 to 50 50 to 200 0 006 to 0 02 0 02 to 0 1 0 1 to 2 2 to 10 10 to 80 0 08 0 25 0 8 2 5 8 0 08 0 4 0 25 1 25 0 8 4 2 5 12 5 8 40 Operating Error Indications During a measurement a message may be displayed which indicates that an error condition has occurred The messages and the probable causes for their display are as follows Display Reason for message Moto...

Страница 23: ... Japan Traverse Speed 1mm sec Measurement metric inch units Cut off values 0 25mm 0 8mm and 2 5mm 0 01in 0 03in and 0 1in Traverse lengths 0 25 25mm 0 05 0 98in Display LCD matrix 8 lines x 20 characters alphanumeric 9 pin D connector female Containing RS232 hardwired handshake RS232 level Accessory socket Transmit function only hardware implemented Remote start 5V logic Remote start short to grou...

Страница 24: ...ange Language of printout same as language of display The printout heading is shown below Starrett SR200 Operator Date Object Cutoff xxx mm Evaluation length xxx mm Filter xxx Rapp Industrial Sales 724 789 7853 sales rappindustrialsales com ...

Страница 25: ...S232 Transmitted data is unfiltered No parameters are calculated Transmission data Data type Function Comments 2 bytes Number of data values Total number of transmitted data values 1 byte Ordinate spacing Number of data values per mm 1 byte First data value Resolution 10nm 1 byte Diff data value Difference between this and the previous data value 80 Stop byte 2 stop bytes are sent 80 Stop byte Mak...

Страница 26: ...g measured eg by the datum support stand Figure 9 The small bore pickup Figure 10 The right angle pickup Right Angle Pick up 5µm 200µin stylus tip radius SR 112 1505 This pick up is used at right angles to the direction of traverse Accordingly the skid is set at right angles to its normal position It is particular useful in grooves or slots where the lay of the surface texture makes it unsuitable ...

Страница 27: ...wing manner 1 Disconnect the pick up lead from the traverse unit and remove the pick up from the traverse unit carriage 2 Remove the lead from the pick up 3 Carefully locate the central pin of the extension rod with the hole in the pick up and screw the rod and pick up together 4 Thread the lead from the extension rod through the hole provided in the back plate of the traverse unit and connect it ...

Страница 28: ... Ra value from the display with that marked on the specimen 4 If it differs by more than 2 use the small screwdriver to turn the sensitivity adjuster This is located through the hole which is located in the front panel of the Display Unit just above the pick up connector 5 Repeat the measurement and adjustment until the measured value is within 2 of the value marked on the specimen Cleaning the St...

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