REED ST-156 Instruction Manual Download Page 15

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Pantone 534 Blue

Pantone 123 Yellow

Pantone 485 Red

Pantone 123 Yellow

Pantone 534 Blue

Black

Rich Black - 

20/20/20/100

Blue -  100/80/30/5

Yellow - 0/27/100/0

Red - 10/100/100/5

Yellow - 0/27/100/0

Blue -  100/80/30/5

Only if you REALLY need them:

Pantone 534 Blue -  100/80/30/5

Pantone 485 Red - 10/100/100/5

Pantone 123 Yellow - 0/27/100/

General Remarks on Measurement 

After the calibrations have been made, all subsequent measurements will 
lie within the guaranteed measuring tolerance. Strong magnetic fields near 
generators or live rails with strong currents can affect the reading. When 
using the Statistics Function for obtaining a mean value, it is advisable 
to place the probe several times at a typical measuring spot. Any false 
readings or outliers can be removed immediately via the Menu. The final 
reading derives from the statistical calculation and from the guaranteed 
tolerance levels of the gauge.  
 

Coating Thickness D = X ± s ± u 

 

Example:  

 

Readings: 150um, 156um, 153um 

 

Mean value: X = 153um 

 

Standard deviation: s= ± 3um 

 

Measuring uncertainty: u = ± (1% of r 1um)  

 

D = 153 ± 3 ± (1.53um + 1um) = 153 ± 5.5um  

Limit Function 

Limits can be entered in Direct Mode and a selected Group memory at 
any time. Any reading, which falls outside the set tolerance limits, will be 
registered by a warning indication: 
 

H: Reading above the HI limit 

 

L: Reading below the LO limit 

The limit values can be set by via the Menu. Press the Up or Down arrows 
to scroll between the High or Low limits. Select the limits with the Blue 
Bar Button, adjust the value with the Up and Down Buttons, and press the 
Blue Bar Button again to confirm the limit.  

Using Statistics 

The meter calculates statistics from a maximum of 80 readings (GRO1 - 
GRO4: a total maximum of 400 readings can be stored). In addition, read-
ings can’t be stored while in Direct Mode, but it can calculate statistics 
as GRO1 - GRO4. When the meter is turned off or the Work Mode setting 
has been changed, DIRECT statistics will be lost. The following Statistical 
Values are calculated: 

continued ...

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Summary of Contents for ST-156

Page 1: ...w com Model Black Pantone 534 Blue 100 80 30 5 Pantone 485 Red 10 100 100 5 Pantone 123 Yellow 0 27 100 Instruction Manual Ultrasonic Thickness Gauge ST 156 www reedinstruments com 1 877 849 2127 info reedinstruments com ...

Page 2: ...ing 7 Unit Settings 7 Total Reset 8 Backlight 8 Statistic View 8 Measurement View 8 Auto Power Off 8 Direct and Group Mode 9 Calibration Methods 9 10 Storing Calibration Values 10 Calibration Example 10 High Accuracy Calibration 11 Cleaning the Measuring Point 11 Calibration Tips 11 Preparing for Calibration 11 Zero point Calibration 11 12 One point Calibration 12 13 Two point Calibration 13 Shot ...

Page 3: ... measurement for non ferrous metal substrates One or two point calibration User settable high low alarms Easy Zero calibration Min Max and Average functions Memory stores up to 400 readings Easily delete single or group readings Auto Power off function Backlight Measurement Range 0 to 1250 µm 0 to 49 mils Specifications Working Temperature 0 C 40 C 32 F 104 F Working relative humidity 20 90 Power ...

Page 4: ...m 1250um 5 0 33 46mils 3 0 039mils 33 46mils 49 21mils 5 0 850 um 3 1 5um 850um 1250um 5 0 33 46mils 3 0 059mils 33 46mils 49 21mils 5 Precision 0 50um 0 1um 50um 850um 1um 850um 1250um 0 01mm 0 1 968mils 0 001mils 1 968mils 33 46mils 0 01mils 33 46mils 49 21mils 0 1mils 0 50um 0 1um 50um 850um 1um 850um 1250um 0 01mm 0 1 968mils 0 001mils 1 968mils 33 46mils 0 01mils 33 46mils 49 21mils 0 1mils M...

Page 5: ...er ON OFF Button 3 Zero Calibration Button 4 Down Right Button 5 Blue Bar Button 6 Main display 7 Measuring unit 8 NFe non ferrous Fe ferrous 9 Indicates the probe working principle AUTO Magnetic induction or Eddy current 10 Indicates that the meter is currently controlled via PC 11 USB connecting port 12 Low Battery Indicator 13 Working mode indication DIRECT or GROUP 14 Statistic display AVG MAX...

Page 6: ...ed Bar Button to enter Menu The following illustrates how the Menu system is arranged Menu Statistic view Average view Minimum view Maximum view Number view Sdev view Options Measure mode Single mode Continuous mode Working mode Direct Group 1 Group 2 Group 3 Group 4 Used probe AUTO Fe No Fe Unit settings um mils mm Backlight ON OFF Continued under Options LCD Statistic Average Maximum Minimum Sde...

Page 7: ...lly entered into the statistics program as long as sufficient memory is available Single Mode In Single Mode the probe is lifted off the surface being measured and moved Readings are accompanied by a beep All readings taken in this mode are automatically entered into the statistics program as long as sufficient memory is available Probe Operating The probe can work in three modes AUTO The probe ca...

Page 8: ...Measuring Mode press the Blue Bar Button to switch the Back light ON or OFF You can change the Backlight default to ON or OFF in the Menu Statistic View While in the Menu choose Statistic View to toggle between Average Maximum Minimum and Standard Deviation functions Press the Red Bar Button to select the current Statistic View and to return to measurement mode A corresponding symbol of the Statis...

Page 9: ...r memory groupings that can store a maxi mum of 80 single readings and 5 statistic values Calibration values and limit values can individually be set and stored for every group When the memory is full measuring will still continue but will not be stored and statistic values won t be changed You can delete group data and statistic values and reset the calibrate values and limit values When measurin...

Page 10: ...An incorrect reading has been taken An incorrect command has been entered The meter has been switched off Calibration Example Calibration is the required for accurate measurements The more closely the calibration sample matches the product sample the more accurate the calibration and therefore the reading will be If for instance a product is to be measured on a steel cylinder quality ST37 mild ste...

Page 11: ...of metal etc The slightest impurity will affect measurement and distort read ings Calibration Tips Basic Calibration should only be used for measurements on even sur faces i e on steel components made of conventional steel mild steel or on aluminum components First select Calibration Mode via the Menu Menu Calibration Enable The LCD screen will display Cal n or 1 2 Zero n or y The n means Not any ...

Page 12: ... When full the newest calibration value will replace the oldest calibration value We suggest that you make a Zero Calibration when starting any measurement One point Calibration This method is recommended for high precision measurements measure ments on small parts and on hardened and low alloy steel 1 Zero point Calibrate according to the Zero point Calibration in structions 2 Lay the calibration...

Page 13: ...rent foils a thin foil and a thicker foil about 1 5 times as thick as the thin one For best results the thickness to be expected should be some where between the two calibration values This method is suitable for taking measurements on rough shot blasted surfaces or for high precision readings It is recommended to take 5 measurements as to reduce the effect of scattering which occurs during calibr...

Page 14: ...mean coating thickness Xeff over the peaks The greater standard deviations of the two values Xm and Xo should also be taken into consideration Xeff Xm Xo S Method B Carry out a Zero point Calibration of 10 readings on a shot blased uncoated sample Then carry out a Foil Calibration on the uncoated substrate The foil set should consist of a number of individual foils of max 50 microns thickness each...

Page 15: ...mple Readings 150um 156um 153um Mean value X 153um Standard deviation s 3um Measuring uncertainty u 1 of reading 1um D 153 3 1 53um 1um 153 5 5um Limit Function Limits can be entered in Direct Mode and a selected Group memory at any time Any reading which falls outside the set tolerance limits will be registered by a warning indication H Reading above the HI limit L Reading below the LO limit The ...

Page 16: ... deviation of a set of numbers is the root mean square of the variance S2 The variance of a list is the square of the standard deviation of the list that is the average of the squares of the deviations of the numbers in the list from their mean divided by the number of readings 1 Variance S2 Standard deviation S NOTE Deletion must take place immediately after an outlier or erratic reading has been...

Page 17: ...n this function will delete High Alarm Low Alarm and One and Two point Calibration Values Meter Control via PC All measured readings of all work modes can be downloaded to PC via USB port for data analysis See software guide for more details Trouble Shooting The following list of error messages explains how to identify and eliminate faults Err1 Err2 Err3 Connecting of probe fault Deviant signal Er...

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