ElektroPhysik MiniTest 7200 FH, MiniTest 7400 FH Technical Manual And Operating Instructions

Technical Manual /Operating Instructions

MiniTest 7200 FH / MiniTest 7400 FH Thickness Gauges

Contents

1. INTRODUCTION..........................................................................................................................5

2. FIRST STEPS.................................................................................................................................6

2.1 I

NSERT BATTERIES AND CONNECT SENSOR.................................................................................6

WITCH ON AND TAKE READINGS..............................................................................................7

2.2 S

2.2.1 Setting language..................................................................................................................7

3. DESCRIPTION OF THE MEASURING SYSTEM...................................................................9

3.1 B

ASIC UNIT .................................................................................................................................9

3.1.1 General Remarks.................................................................................................................9

3.1.2 Operating keys ....................................................................................................................9

3.1.3 Sockets and interfaces.......................................................................................................10

3.1.4 Power supply.....................................................................................................................10

3.1.4.1 Batteries and storage batteries......................................................................................10

3.1.4.2 Power supply unit...........................................................................................................11

ENSORS FH 4 AND FH 10........................................................................................................11

3.2 S

3.2.1 General Remarks...............................................................................................................11

3.2.2 Sensor Models...................................................................................................................11

3.2.3 Sensor Stand......................................................................................................................12

HE USER MENU.........................................................................................................................13

4. T

4.1 G

ENERAL REMARKS

4.2 S

WITCH

-ON / S

4.3 M

EASURE SCREEN /STATISTICS SCREENS ..................................................................................13

....................................................................................................................13

TART SCREEN

......................................................................................................13

4.3.1 Measure Mode – Numerical Screen..................................................................................13

4.3.2 Measure Mode –Graphics Screen with MiniTest 7400 FH ..............................................14

4.3.3 Statistics Screens...............................................................................................................14

SER MENU ..............................................................................................................................15

4.4 U

4.4.1 U

4.4.2 N

4.4.3 A

SER PREFERENCES...............................................................................................................15

UMERICAL ENTRIES .............................................................................................................16

LPHANUMERICAL ENTRIES (ON MINITEST 7400 FH)...........................................................16

5. MEASURE MODE......................................................................................................................17

MPORTANT NOTES ON THICKNESS MEASUREMENT..................................................................17

5.1 I

5.1.1 Limitations to magneto-static thickness measurement......................................................17

5.2 BATCH CONFIGURATION / NECESSARY SETTINGS.....................................................................17

5.2.1 Batch .................................................................................................................................17

5.2.2 Target Ball Size.................................................................................................................18

5.2.3 Data Logging Mode..........................................................................................................18

5.3 PREPARING MEASUREMENT......................................................................................................18

5.3.1 Calibration........................................................................................................................18

5.3.2 Measurement without Sensor Stand..................................................................................19

5.3.3 Using the Sensor Stand.....................................................................................................19

5.4 TAKE READINGS .......................................................................................................................19

5.4.1 Measurement without Sensor Stand..................................................................................19

5.4.2 Using the sensor stand......................................................................................................20

5.4.3 Delete Readings ................................................................................................................20

TORING READINGS INTO STATISTICS MEMORY.......................................................................20

5.5 S

5.5.1 Data Logging Mode..........................................................................................................20

5.5.2 Manual Data Storage........................................................................................................21

Contents

5.5.3 Automatic Data Storage (Auto).........................................................................................21

5.5.4 Storing Minimum Reading................................................................................................21

5.5.5 Storing Maximum Reading................................................................................................21

5.6.1 Correct Sensor Position....................................................................................................22

5.6.2. Incorrect Readings through tilting of the Sensor.............................................................22

5.6.3 Incorrect readings through Blocked Target Ball..............................................................23

5.6.4 Air gap...............................................................................................................................23

5.6.5 Measuring material with ferruginous particles................................................................23

6. CALIBRATION...........................................................................................................................24

6.1 G

ENERAL REMARKS ON CALIBRATION .....................................................................................24

ALIBRATION METHODS............................................................................................................25

6.2 C

6.3 H

OW TO CALIBRATE ..................................................................................................................26

6.3.1 Factory Calibration ..........................................................................................................26

6.3.2 Zero only...........................................................................................................................26

6.3.3 Multi-point calibration (Zero + 1 to 4 point(s) )..............................................................27

ELETE CALIBRATION PO INT ....................................................................................................28

6.4. D

6.5 C

ALIBRATION ERROR SOURCES ................................................................................................29

7. DATA STORAGE........................................................................................................................30

7.1 BATCHES...................................................................................................................................30

7.1.1 General..............................................................................................................................30

7.1.2 Batch Data ........................................................................................................................30

ATABASE OF THE MINITEST 7400 FH.....................................................................................31

7.2 D

7.2.1 General Remarks...............................................................................................................31

7.2.2 Tree structure....................................................................................................................31

7.2.3 Create a Directory............................................................................................................31

7.2.4 Create a New Batch ..........................................................................................................32

7.2.5 Select a Batch for Measurement .......................................................................................32

7.2.6 Delete a Batch / a Directory .............................................................................................33

7.2.7 Rename a Batch / Rename a Directory.............................................................................33

8. STATISTICS................................................................................................................................34

TATISTICAL PARAMETERS.......................................................................................................34

8.1 S

8.1.1 Upper and lower specifications limits (USL and LSL).....................................................34

8.1.2 Set Point (Differential Mode)............................................................................................35

8.2 R

EADINGS .................................................................................................................................35

8.2.1 View Readings...................................................................................................................35

8.2.2 Delete Single Readings .....................................................................................................35

8.2.3 Delete all Readings...........................................................................................................36

UMERICAL STATISTICS ...........................................................................................................36

8.3 N

8.4 H

ISTOGRAM ON MINITEST 7400 FH .........................................................................................37

REND DIAGRAM ON MINITEST 7400 FH.................................................................................37

8.5 T

9. DATA OUTPUT / DATA TRANSFER......................................................................................38

9.1 D

ATA PRINT-OUT

........................................................................................................................38

9.1.1 Screen Shot........................................................................................................................39

9.1.2 Print-out a Batch...............................................................................................................39

9.2 T

RANSFER DATA TO A PC.........................................................................................................40

10. MAIN MENU .............................................................................................................................41

10.1 D

ATABASE ..............................................................................................................................41

Contents

10.2 S

TATISTICS..............................................................................................................................41

10.3 C

10.4 A

ALIBRATION..........................................................................................................................41

CTIVE BATCH .......................................................................................................................41

10.4.1 Batch Properties .............................................................................................................41

10.4.2 Readings..........................................................................................................................42

10.4.3 Configuration..................................................................................................................42

10.4.4 Calibration......................................................................................................................42

10.5 S

ETUP

.......................................................................................................................................43

10.5.1 General Remarks.............................................................................................................43

10.5.2 Display............................................................................................................................43

10.5.3 Date and Time.................................................................................................................43

10.5.4 Data Outputs...................................................................................................................44

10.5.5 User Preferences.............................................................................................................45

10.5.6 Gauge Specifications.......................................................................................................45

11. SPECIAL FUNCTIONS............................................................................................................46

NITIALIZING...........................................................................................................................46

11.1 I

11.2 S

PECIAL FUNCTIONS

..................................................................................................................47

12. QUICK REFERENCE ..............................................................................................................48

13. CARE AND MAINTENANCE.................................................................................................49

13.1 C

ARE.......................................................................................................................................49

13.1.1 Using NiMH storage batteries........................................................................................49

13.2 M

AINTENANCE

.....................................................................................................................49

14. TECHNICAL SPECIFICATION.............................................................................................50

14.1 G

AUGE AND SENSOR SPECIFICATION

14.2 D

ELIVERY SCHEDULE .............................................................................................................52

..........................................................................................50

14.2.1 Thickness gauge MiniTest 7200 FH / 7400 FH..............................................................52

14.2.2 Sensors............................................................................................................................52

14.3 A

CCESSORIES..........................................................................................................................53

15. APPENDIX.................................................................................................................................56

15.1 T

ROUBLESHOOTING

15.2 D

ETECTION OF ERROR SOURCES

TATISTICAL TERMS ...............................................................................................................60

15.3 S

15.4 S

AFETY NOTES........................................................................................................................62

15.5 D

ECLARATION OF CONFORMITY

15.6 A

FTER SALES SERVICE

...................................................................................................................56

(INF

FLAG

)

...............................................................................59

.................................................................................................64

..............................................................................................................65

INDEX...............................................................................................................................................66

1. Introduction

Designed for non-destructive thickness measurement, the portable MiniTest 7200 / 7400 FH measuring systems are suit able for in the field or laborator y use. Working on the mag neto-static principle, the gauges enable quick and easy measurem ent on non-ferromagnetic m at er ials. The measuring system consists of a handy sensor, which is connected via a cable to the base and display unit for visualization and processing of readings. For measur ement , specially treated targ et balls made of a ferromag netic material are used as a r eference. For measurement , a target ball is placed on the material to be measured so that the material thickness between target ball and sensor will be measured. The measuring system comes with sensor stand ( available as an option) to add additional comfort of handling during measurement. For documentation a portable data printer is available. The measuring system may also be connected to a PC for data communication. For taking reading s, the sensor is placed on the surf ace of the m easuring object, the target ball is placed on the opposite side of sample. The sensor is placed on the opposite side of sample. Equipped with a strong perm anent magnet, the sensor at tracts the target ball and holds it exactly over its sensor tip. W hen moving the sensor, the tar get follows accordingly. The presence of the target ball will change the magnetic field near the sensor tip. The magnetic field changes according to the distance between target ball and sensor tip. T he change of mag netic f ield increases with the distance between target ball and sensor t ip getting smaller and can be taken as a reference for the material thickness of the sample to be measured. The sensor incorporates a Hall element to capture the change of magnetic field and to translate it into thickness.

For measuring hollow parts, a target ball is placed into the interior of sample and the sensor is placed on the opposite side in order to attract the t arget ball exactly over the sensor tip. For taking readings, the sensor is moved over the surface of sample. For measuring sheets, the sensor is placed on the surface of sheet and t he target ball is placed near the sensor on the opposite side of sheet. The target ball will automatically center on the correct measuring position and the measuring processes can be started.

For measuring large-sized parts, the sensor can be guided manually over the sample to be measured. For measuring small part s, it is recommended to use the sensor stand supplied with the sensor. Suitable for use in industrial production areas, the measuring systems MiniTest 7200 / 7400 FH measure hollow parts, containers and sheet material of all kinds such as bottles, cans, inject ions moldings, car bodies, glass, SMC components etc made of non-magnetic (non-f er r it e) m at erials.

2. First Steps

This section refer s to persons to use the gauge for the first time. This section explains the main features of the gauge and how to take readings.

2.1 Insert Batteries and connect Sensor

a) Take gauge and batteries from the carrying case. b) Push the battery compartment lid at the gauge bottom in arrow direction (as shown below) c) Inser t bat teries into the battery compartment. Respect polarities (as shown below). d) Close lid.

b) c)

e) Take requested sensor (FH4 or FH10) form t he carrying case. Plug sensor into the sock et on

top of the base unit (as shown below). Make sure the nib of plug is correctly inserted into the guide way of socket. The red mark ing at t he probe plug must be positioned correctly to the red marking at the sensor plug .

f) Fully engage the sensor plug into the sensor sock et t o t he stop.

Sensor Socket

2.2 Switch ON and Take Readings

2.2.1 Setting language

This setting can be made at initial use or as requested at any time (see section 11.1) Press the red ON/OFF button on the left side of gauge and ESC simultaneously to switch on and to go to initialization menu.

1. A banner appear s with a language option. User arrow keys ↑↓ to go to your requested language option. Press OK to confirm or ESC to abor t.

2. On display appears “Total Reset”. A Total Reset restores factory settings. To abort Total Reset, press Function key “No” (section 11.1)

a) Start Screen appears showing company logo, gauge version

and sensor type that is currently connected (see illustr. on the

Flashing antenna symbol if sensor is

connected

left.

b) After approx. 2 seconds, the gauge switches automatically into

measure mode and is ready to take readings. The Measure Screen will appear without any reading being shown.

c) At initial switch-on the gauge is in “Direct Mode“ (see section

7.1.1). For this mode, the factory calibration is preset (for more detailed information on “Calibration” topics please refer to section

6). The Status Line provides informat ion on the active calibration method and the active batch (MiniTest 7400 FH) Please check whether the target ball size as adjusted mat ches your application (for more det ails on targ et ball size pleaser refer to sect ion 5.2.2 “Target ball size”).

Target ball diameter, hiere: 4.0 mm.

Selected calibration mode, here:

Zero calibration

Active batch, here: Pet bottle (only with Minitest 7400 FH)

Status line

d) The factory calibration is for q uick and easy measurement when larger measuring errors are

acceptable. For other calibration methods please refer to section 6.2.

e) For measurement, please use the sensor st and supplied with the gauge. Place the measuring

object on the sensor. Place the target ball on the opposite side. For measuring hollow parts, place the ball inside the sample. Equipped with a strong permanent magnet, the sensor attracts the target ball and holds it exactly over its sensor tip. Hold t he measuring object in rectangular position to the sensor and move it smoothly over the sensor. Press OK to store the reading into memory. Press Function key “Statistics” to view readings and the numerical st at istics.

For measuring large-sized sheeting material or large hollow parts, place the senor on the surface of sample. The t arget ball is placed on the opposite side near the sensor. Keep the sensor in rectangular position to the surface and move it across the surface of sam ple.

Large backlit display for easy reading of

measuring values, statistical data, histog ram and

3. Description of the measuring system

3.1 Basic unit

3.1.1 General Remarks

Graphics display 160 x 160 Dots

3.1.2 Operating keys

trend diagram.

Robust scratch resistant plastics housing.

ON/OFF button

Command and navigation key

Function keys

block

Use the ON/OFF button to switch the gauge ON or OFF. If you press ON/OFF butt on and ESC simultaneously, the initializing procedure will be perform ed ( for more details please refer to section

11.1). The Function keys may assume different functions according to the menu being active. Their current properties are displayed in the line upper to the Function keys.

The command and navigation key block may also assume different functions:

Press OK to confirm settings, store values or select menu items.

Press ESC to abort actions or to quit submenus.

Use ARROW k eys to navigate through the menu or change sett ings.

If the alphanumerical block has been activated, OK and ESC keys also assume navigation

functions.

The Function keys and the command and navigation k ey block may be backlit on request. This adds additional comfort in poor light condit ions ( for more details please refer t o section 10.5.2)

Press the “Help” Function key for calling the context-or ient ed on-line “Help“.

3.1.3 Sockets and interfaces

Multi-purpose socket

Sensor socket

IR Interface

The basic unit features a sensor socket for connecting the FH 4 or the FH 10 sensor. The multipurpose socket is used for connecting the mains unit, the foot switch, the alarm device or the RS232 interface cable.

3.1.4 Power supply

3.1.4.1 Batteries and storage batteries

Both models, MiniTest 7400 FH and MiniTest 7200 FH, are powered by a set of four alkalinemanganese cells, 1.5V, AA LR6 size (Batteries included in the standar d supply schedule.) .

As an alternative, both models may be operated on rechargeable NiMH (type AA-HR6) storage batteries or via a power supply unit (available as an option). Please use only products as recommended by ElektroPhysik (See section 14.3, Accessories).

If you wish to use the storage batteries, they must be recharge using the external charger unit (available as an option). Please also refer to section 13.1 “Care and maintenance” for more details.

Note:

• Remove batteries or storage batteries from the instrument if you are not going to use it for a longer period of time.

• The battery symbol on display indicates the battery state.

• For field use, replacement batteries should be m ade available.

• Erratic readings due to low battery voltage do not occur because the g auge switches off or

does not switch on if the battery is too low.

• Used or defective batteries or storage batt er ies m ay contain hazardous substances and must be disposed according to the legal provisions of your count r y.

3.1.4.2 Power supply unit

For mains operation, the power supply unit must be used. If oper at ed via the power supply unit, batteries should be inserted to supply the internal time clock, otherwise, after approx. 1 minute, the settings of the real-tim e clock will go lost as soon as supply from the mains is cut.

The power supply unit comes with two different adapter plug versions ( Eur o and US plug). If the power supply unit comes with an adapter plug connected that does not match your socket, sim ply change the adapter plug accordingly.

Simply remove the adapter from the power supply unit and fix the ot her one as r equired.

Note:

The adapter has not been designed for frequent change.

3.2 Sensors FH 4 and FH 10

3.2.1 General Remarks

In this new SIDSP (Sensor integrated digital signal processing) procedure, all necessary measuring signals are created and complet ely processed in the sensor itself. Only the completely processed digital readings are transferred to the base unit for display, statistical evaluation and data storage. Unlike the comm only used analog procedures, the new SIDSP procedure excludes any error influences on the measuring data during transfer over the probe cable. The result is a measuring accuracy and constancy of readings that has been unmatched so far. T he complete sensor technique is integrated into a robust stainless-steel housing.

3.2.2 Sensor Models

Two sensor models are available:

FH 4 sensor to cover the 0 …4 mm range

FH 10 sensor to cover the 0…10 mm range.

Both sensors feature a wear-resistant sensor tip most suitable also for hard materials such as glass, for instance.

3.2.3 Sensor Stand

Both sensor types come with a spring-loaded V-grooved sensor stand. The use of the sensor stand ensures increased reproducibility of readings by adding stability of t he sensor dur ing measurement so that even small parts can be measured without problems.

Power supply indicator

Adjusted set point

CALIBRATION MODE

Number of readings

function key

ties

are indicated in the line above the

4. The User Menu

4.1 General Remarks

4.2 Switch-ON / St art Screen

At switch on, the company logo, gauge version and type of sensor being connected appear on display.

After approx. 2 seconds the gauge switches to the m easur e scr een of the last batch that was active before the gauge was switched off.

4.3 Measure screen /Statistics screens

Readings can be displayed numerically only or numerically combined with a diagram (only with MiniTest 7400 FH)

4.3.1 Measure Mode – Numerical Screen

Time clock

Current reading Target ball size and measuring unit

Minimum reading Maximum reading

The current function keys.

Active batch (MiniTest 7400FH only)

Status line

proper-

Power supply indicator

Reading

NAME OF ACTIVE BATCH

⇑

UPPER LIMIT

CALIBRATION METHOD

REAL

TIME TREND

Set point

function key

ties

are indicated in the line above the

STATUS LINE

function key

ties

are indicated in the line above the

Power supply indicator

Process capability,

cp and cpk

4.3.2 Measure Mode –Graphics Screen with MiniTest 7400 FH

Time clock

Target ball size, measuring unit

DATA LOGGING MODE

MAX = MAXIMUM READING N = NUMBER OF READINGS

MINIMUM READING

⇓

LOWER LIMIT

The current function keys.

proper-

For setting the Real-Time Trend display option, select “Act ive Batch” form the Main Menu. Press OK to confirm. Select “Configuration” from the Batch Menu and press OK to confirm. Use the arrow keys to move to the “Graphics” option. O N or OFF is highlighted. Use arrow keys to make your selection and press OK to confirm or the “ESC” navigation button to restore pr evious setting and to go back to the previous menu level.

To take full advantage of the real-time trend it is necessar y to t oler ance lim its (see also section

8.11 „Upper specification limits (USL) and lower specification limits (LSL)“.

4.3.3 Statistics Screens

Time clock

Selected calibration mode

The current function keys.

Active batch (MiniTest 7400 FH only)

proper-

4.4 User Menu

The numerous MiniTest FH 7400 / 7200 features can be accessed via the different menus that are divided into submenus.

Press the Function key “Main menu“ in order to get access to the main menu.

Select an item from the Main Menu (e.g. Database) and pr ess OK to confirm. You will go to a submenu. Use the arrow keys to select the requested it em and press OK to confirm. To go back to the previous menu level press ESC.

According selected submenu you can

View settings (e.g. Gauge specs = Gaug e specifications in the Setup Menu)

Select preset parameters (e.g. 100% brightness from the Display Menu)

Make numerical or alphanumerical entries (e.g. Ent er a dir ectory name in the database / new

directory option).

4.4.1 User Preferences

Use the arrow keys to select your requested menu item, e. g. Language. Press OK to confirm. T he cur r ent selection will be highlighted. Use the arrows to select the requested parameter ( e. g. English) and press OK to confirm. To undo your selection, press ESC and you will return t o the previous menu level.

4.4.2 Numerical Entries

As soon as the alphanumeric block is activated, ESC and OK will assume navigation functions to the left or right. Choose your character by placing the cursor over the requested character. After a certain period of time, the entry will be accepted automatically without the need to confirm. This period of tim e can be specified under User Pref erences in the “Entry accepted” option. See also section 10.5.5 for further reference. Complete your entry by pressing Function key “Ready” and then confirm “Save changes?” by pressing OK.

4.4.3 Alphanumerical Entries (on MiniTest 7400 FH)

For alphanumerical entries you can use as many as 15 characters for entering a name. ESC and OK assume navigation funct ions to the left or right. Choose your character via the alphanumerical block. Your selection will be automatically accepted after the previously specified period of time. This period of time can be set under User Pref erences in the “Entry accepted” option. See also section 10.5.5 for further reference. Complete your entry by pressing Function key “Ready”. Complete your entry by pressing Function key “Ready” and then confirm “Save changes?” by pressing OK.

5. Measure Mode

5.1 Important Notes on Thickness Measurement

Make sure that the operator has been properly instructed regarding the use of thickness gauges and has basic knowledge of the specific req uir ements for measurement of the application. The operator should have basic knowledge of the following:

• Selection of a measuring device suitable for his application

• Fundamentals on the magneto-static m easur ing principle

• Influences on the magnetic f ields t hr ough the surrounding field

• Influence of the surf ace pr oper t ies of the material to be tested (roug hness, build-up on the

surface)

• Statistical evaluation of measuring series

• Gravity influencing the reference ball

5.1.1 Limitations to magneto-stati c t hi ckness measurement

The information obtained f rom thickness measurements according to the magneto-static principle only refer to those parts of the test object that have been covered by the magnetic sensor . For t hat reason, be careful to draw conclusion on other parts of the measuring object that have not been covered by the sensor during measurement. In g eneral, such conclusions are only admissible if comprehensive experience and approved methods of statistical data acquisit ion ar e available.

5.2 Batch Configuration / Necessary Settings

Before taking reading s, it is necessary to make a few settings in the Configuration menu. The Configuration always refers to a cer t ain m easuring series (Batch).

5.2.1 Batch

You can continue to take readings in the active batch

You can create a new batch (only with MiniTest 7400 FH model)

You can choose an exiting batch from the database (please r efer to section 7.2).

According to sensor type and the shape of measuring object, a

Use arrow keys to move to “Target Ball” size and press OK. Use arrow

keys to adjust the requested tar g et ball size. Press O K to confir m your

setting or press ESC to undo your setting. If you undo, you will

get ball setting option and go back to the previous

5.2.2 Target Ball Size

suitable target ball must be set. This can be made in the Configuration menu, menu item “Targ et ball” (also refer to section 6 “ Calibr at ion” .

automatically quit tar menu level.

5.2.3 Data Logging Mode

In the data logg ing mode you can specif y how you wish readings to be stored in memory. Several modes are available:

manually or via footswitch (Current reading, MIN, MAX)

Automatic (Auto)

Note: For logging data into memory please always proceed as follows: Put the sensor into the correct measuring position, press ESC. Then readings can be taken.

5.3 Preparing Measurement

Before measurement, the probe must be adapted to the ambient temperature. In case of high variations in temperature, the targ et ball must be lifted f rom the probe tip at regular intervals (e.g. every other minute). This is to compensate f or f r equency drif t due to variations in temperature. It is recommended to switch on the gauge for warming up around 2 to 3 minutes in order to ensure maximum measuring accuracy.

5.3.1 Calibration

According to your setting of task , you may use different calibration methods. Measuring accuracy depends on the selected calibration method. Please refer to section 6 for more details on this issue. There are three calibration methods available:

Factory

Zero only

Multi-point calibration (Zero + 1 to 4 Point(s)

5.3.2 Measurement without Sensor Stand

For measuring large-sized parts, t he sensor can be guided manually over the measuring sample. For measuring thick samples (6 m m and thicker) make sure to k eep the sensor in vertical position to the sample. When holding the sensor in horizontal position, due to the influence of gravity on the steel ball, the readings will be higher than the actual t hickness.

5.3.3 Using the Sensor Stand

For measuring small part s, bottles or other cylindrical bodies the sensor stand (supplied with the sensor) and a footswitch (available as an option) should be used.

Put the sensor into the stand and secure with the red sensor stand retaining ring.

5.4 Take Readings

5.4.1 Measurement without Sensor Stand

For measurements on large-sized sheeting m aterial or large hollow parts, place the sensor onto the surface of the object to be measured. Place an appropriate targ et ball on the opposite side of object near the sensor. The t arget ball will be attr acted by the strong permanent mag net of sensor and be positioned centrally just opposite of the sensor t ip. Keep the sensor in right-angle posit ion to the object to be measur ed and scan continuously over the surface. For storing readings, please refer to section 5.5.1.

5.4.2 Using the sensor stand

If you are using the sensor stand, position the sample on the sensor tip and keep it in r ight-angle position to the sensor. Place the appropriate tar get ball on the opposite side of obj ect. Make sure to keep the right -angle position while moving the object continuously over the sensor. For stor ing readings, please refer to section 5. 5.1. When measuring small hollow parts such as bottles e.g., put the target ball inside the object and place the object onto the v-grooved device of sensor stand. Turn the object unt il the target ball is centered directly over the sensor tip. Then move the object continuously over the v-groove of sensor stand. For storing readings, please r efer to section 5.5.1.

5.4.3 Delete Readings

Please refer to section 8.2.2 “Delet e Single Readings“.

5.5 Storing Readings into Statistics Memory

5.5.1 Data Logging Mode

During measurement, readings can be stored into memory manually or automatically. Data in memory will be used for statistics.

The following storing options are available:

Storing the current reading manually or automatically

Storing the minimum reading (only manually)

Storing the maximum reading (only manually).

The Data logging mode can be specif ied in the “ Conf igur ation” submenu. Use ar row keys to select the Data logging mode option and pr ess OK to conf irm. You can chose f rom t he following setting options:

Curr. reading (Current reading)

Auto

Max

Min

Make your selection and press OK to confirm. If you wish to undo your setting (before OK has been pressed) press ESC and the gauge will return to t he pr evious menu level.

5.5.2 Manual Data Storage

During the measuring procedure, cur rent readings can be stored manually into the active batch by pressing OK or by actuating a foot switch. For t his option set Data logging mode to “ Curr . reading”.

5.5.3 Automatic Data Storage (Auto) Auto option

In the auto mode, readings will be stored automat ically during the measuring procedure as soon as you press OK. To st op the automatic data storage press O K again. If a footswitch is connected, readings are stored as long as the f oot switch is actuat ed. Before starting the automatic data storage make sure the sensor is placed in the correct measuring position. Make sure to st op the automatic data storage BEFO RE t he sensor has left the measuring position. This is to avoid errat ic readings to be stored into memory that m ight occur when putting the sensor to or lifting it from the sample.

After setting the Data logging option to the Auto option, a Logging rate option will appear. The logging rate defines t he time intervals at which data will be stored into memory (1, 2, 5, 10 or 20 readings per second). For slow measurement scans, a low logging rate should be set, for quick scanning, the logging rat e should be set to a higher rate.

5.5.4 Storing Minimum Reading

In the Minimum option, m inimum r eadings will be stored to t he active batch by pressing OK during measurement or by activating a foot switch. To set Data logging mode t o the MIN option, go to the Configuration submenu and select Data logging mode. Use arrow keys to select MIN and press OK t o confirm. Please note: The minimum reading can also be stored even after the sensor has been lifted from the sample.

5.5.5 Storing Maximum Reading

In the Maximum option, maximum readings will be stored to the active batch by pressing OK during measurement or by activating a footswitch. To set Data logging mode t o the MAX option, go to the Configuration submenu and select Dat a logging mode. Use arrow keys to select MAX and press OK to confirm.

Important note:

Make sure to put the sensor into the correct measuring position and to press ESC before

storing the Maximum reading into memory.

OK must be pressed BEFORE the sensor is moved from its measuring position.

ned correctly in perpendicular position

to the sample. The reading will therefore be hig her t han the actual

5.6 Error Sources during Measurement

After calibrating the gauge according to your application and appropriate target ball size, the gauge is ready for measurement. The readings will be correct as long as you measure within the range as specif ied for this target ball. The target ball is placed on one side of the sample to be measured and will be attracted by the sensor tip on the other side of the sample. The targ et ball serves as a reference to the sensor. What is being m easur ed is t he distance between sensor and target ball. Make sure to place both, the sensor tip and the targ et ball cor r ectly onto the sample. Both must be in good contact with the surface of sample. Otherwise erratic readings (higher readings) might occur. Make sure to keep the sensor in perpendicular position while moving it over the sample. The target ball on the other side must be freely movable.

5.6.1 Correct Sensor Position

The picture illustrates the correct position of sensor tip and steel ball. Make sure to keep the sensor tip perpendicular to the surface of sample.

5.6.2. Incorrect Readings through tilting of the Sensor

Error source: The sensor tip is not positio

thickness.

Remedy: Make sure to keep the sensor in perpendicular position to t he sample. If necessary, use the sensor stand.

The target ball has got stuck through a bulge, e.g. inside the

5.6.3 Incorrect readings through Blocked Target Ball

Error source:

sample. It is out off t he cor r e ct m easur ing position. Remedy: Move the sample in order to release the target ball.

5.6.4 Air gap

Error source: Due to the shape of sample, an air gap is between target ball and measuring object. The reading will be higher than the actual thickness.

Remedy: If the tar get ball is too large, use a smaller one. If the sensor is not in good contact, change measuring position and use a smaller target ball, if necessary.

5.6.5 Measuring material wi t h f errugi nous part i cl es

Ferruginous particles in the material to be measur ed m ay lead to err atic readings because the ferruginous particles may inf luence t he m easur ing signal. This will lead to readings smaller t han the actual thickness.

6. Calibration

Calibration is made in the batch being active and will always refer to this batch, i. e. each batch has its own calibration. Before calibration, an appropriate target ball diameter must be set in the Calibration menu. Please refer to section 5.2.2 “Targ et ball size”.

There are two options to go to the Calibrat ion menu:

from the Main menu choose Calibration

from the Measure Mode menu press Calibration function key.

For selecting an appropriate targ et ball, the following aspects should be taken into consideration:

minimum radius of sample to be measured

maximum thickness to be measured

required measuring accuracy

Sensor Target ball to

be used

Min. Internal radius of sample

Measuring range

Recommended measuring range

FH 4 Ø 1.5 mm 0.75 mm 0 ... 1.5 mm 0... 1.5 mm FH 4 / FH 10 Ø 2.5 mm 1.25 mm 0 ... 2.5 mm 1... 2.5 mm FH 4 / FH 10 Ø 4.0 mm 2.0 mm 0 ... 4.0 mm 2... 4.0 mm FH 10 Ø 6.0 mm 3.0 mm 0 ... 10 mm 3... 6 mm

FH 10 Ø 9.0 mm 4.5 mm 0 ... 10 mm 6... 10 mm

6.1 General Remarks on Calibration

For achieving maximum accuracy, please observe the following calibration instructions:

• Make sure to keep off str ong magnetic fields from t he sensor during measurement.

• Keep away from any ferromagnetic metal par t s in a safety distance of at least 30 cm.

• It is recommended to switch on the gauge for warming up around 2 to 3 minutes befor e

starting calibration procedure.

• Make sure the sensor tip, target balls and calibrat ion st andar ds ar e clean. Any foreign matter may lead to erratic readings.

• For maximum accuracy of calibration and later measurements, choose t he thickness of calibration standard within the same thickness range as the later measuring sample.

• In some cases it may become necessary to recalibrate if a new target ball is used (also if it has the same diameter as the previously used one). To be sure, check calibration in

measuring mode by putting the matching precision standard with the appropriate target ball on the sensor.

• Please note that large target balls will compress soft material more t han sm all t arget balls.

Please note:

If the gauge switches of f during the calibration procedure due to low battery voltage, calibration must be repeated after installing fresh batteries.

Please note:

Each time the target ball is removed f r om t he sensor tip in a distance of more than 30 mm, t he gauge will automatically be adjusted to the inf init e r ange. Any possible drift influences (e. g. through variations in temperature) will be extensively compensated. The m or e often the target ball is removed form the sample, the mor e often compensation will take place so as to increase measuring accuracy.

For that reason it is recommended to lift the target ball f r om the sensor tip at least every three minutes. A message will appear on display accordingly to remind you to repeat inf init e setting (“Refresh infinite Value !!!).

To ensure measuring accuracy, check calibration after one hour of use of t he gauge and recalibrate if necessary.

6.2 Calibration methods

According to your setting of task, you may use different calibration met hods. Measuring accur acy depends on the selected calibration method. The following calibration methods are available:

Factory calibration. This calibration method is suitable for quick and simple measurement and if lar ger measuring errors are admissible as compar ed t o zero calibr at ion.

Zero only (zero point calibration). This method is for quick calibration with a medium measuring accuracy.

Multi -point calibration (Zero + 1 to 4) Calibration standard(s). In most cases a Two-point calibration (Zero + one standar d) will be suf ficiently good as far as calibration is made in the range of thickness to be expected. Further calibrat ion points are recommended if measurem ent will be over a larger thickness range and if accuracy requirements are high.

6.3 How to calibrate

For zero point calibration, the zero standards supplied with the gauge

with the matching target balls. Make sure

always first to place the target ball into the zero standard. Then put

both together onto the sensor. Wait for the sound to bleep, remove the

For mean calculation it is recommended to repeat the procedure

several times. (To g et reasonable values it is always recommended t o

take several readings and to have the mean calculated). Pr ess OK to

Using the sensor stand will add additional comfort during the calibration procedure. For more details please refer to section 5.3.3.

For all calibration methods the following applies:

To call the Calibration menu from Measure mode menu, press the Calibration function key.

Use the arrow keys to go to “Targ et Ball”. Press OK to confirm. Use arrow keys to adjust to

the requested target ball size. Pr ess O K t o confirm.

Use arrow key to go to “Calibration Mode”. Press OK to confirm and use arrow keys to

make your selection. Press OK to confir m .

6.3.1 Factory Calibration

Use arrow keys to select “Factory“. Press OK to conf ir m. The gauge is ready for measurement.

6.3.2 Zero only

Use arrow keys to select “Zero only“. Press OK to confirm.

must be used together

precision standard and keep it in a distance of at least 30 mm.

confirm. A ticked box right to “Zero“ will confirm successful calibration. Now the gauge is ready for measurement.

Zero calibration standard wit h t arget bal l put on it

6.3.3 Multi-point calibrat i on ( Zero + 1 t o 4 poi nt ( s) )

For multi-point calibration you must firs t carry out a zero point calibration. T he precision standards must be used (1 to 4 as requested) to calibrate for the further calibration points. The precision standards have different thick ness values.

1. In most cases a Two-point calibration (Zer o + one standard) will be sufficiently good as far as calibration is made in the range of thickness to be expected.

2. Further calibration points are only necessary if measurement will be made over a larger thickness range and if accuracy req uir em ents are high.

Now use arrow keys to select “Zero + 1 point” calibration. Press O K to confirm. Carry out zero calibrat ion as described under 6.3. 2. Then use arrow keys to select “Calibr. Point 1”, press OK to confirm.

Please always use one of the precision standards supplied with the sensor. Make sure first to place the target ball on the precision standard. Then place t he precision standard toget her with the target ball onto the sensor. W ait for the signal tone to sound and lift the precision standard more than 30 mm from the sensor. For calculation of average repeat several times.

In the “CAL = “ field, the calibration mean value will be shown which has been calculated form the set of single readings you have taken. If this value is the same as specified on the precision standard, press OK to complete the calibration procedure. If not, please use arrow keys to correct the value as requested.

In the alphanumerical input field, you can enter the t hickness of the precision standard along with the unit. ESC and OK assume navigation functions to the left or right. You can select the requested character via the numerical block. Your selection will be automatically accepted after the specif ied period of tim e. This period of time can be specified in the Setup menu. Chose User Preferences and select “Entry accepted” (see also section 10.5.5). Com plete your entry by pressing Function key “Ready”. To store your setting, press OK. Then press OK again to quit .

For more calibration points repeat procedure as necessary. The current state of calibration is indicated in the calibration check box in the calibration menu. Ticked boxes will mark successful calibration points.

After successful calibration of the last calibration point, the gaug e is ready for measurement.

6.4. Delete calibration point

Use arrow keys to move to the calibration point to be deleted. Press “Delete” Function key and press OK to confir m or ESC to abort. Pressing “Delete” Funct ion key a second time will remove the (X) from the check box. If you press again “Delete” Function key, the calibration value will also be deleted.

6.5 Calibration Error Sources

The following situations may lead to erratic calibration:

Error: Remedy:

Wrong target ball: Select an appropriate target ball suitable for

your measuring sample and the thickness to be expected. Adjust to the correct target ball size via the menu.

Calibration range does not match to the thickness to be expected:

During calibration, the precision standard has not been placed correctly on the sensor Tipp.

Calibrate within the thickness range to be expected.

Make sure to fully engage the precision standard on the sensor tip.

Calibration error due to changes in temperat ur e Before calibr at ion, the sensor must be adapted

to the ambient temperature. Please wait 30 minutes after switch on before starting measurement.

Worn or damaged precision standards: Please use new precision standards in

impeccable condition.

Build-up on the sensor tip. Clean sensor tip from metal par t s , dir t par t icles

etc. by using a soft cloth.

7. Data Storage

7.1 Batches

7.1.1 General

Readings and their statistics will be stored in batches. Batches can be nam ed alphanum er ically and stored in the database directly or under a certain directory. One batch is firmly installed under the name “Direct Mode”. This batch cannot be deleted nor can it be r enam ed. The model MiniTest 7200 FH does not include the database featur e, but it offers one

predefined

measuring batch.

7.1.2 Batch Data

7.1.2.1 Readings

One batch may include as many as 100,000 single readings plus statistics. The model MiniTest 7400 FH offers a maximum of 240,000 values in total.

7.1.2.2 Calibration Values

Calibration always refers to a certain measuring batch. As soon as a measuring batch is called, the corresponding calibration will become active. The calibration includes the following parameter settings: diameter of t arget ball, type of calibration and sensor.

7.1.2.3 Other Parameters

The parameters as set in the Configuration submenu such as Data logging m ode, Logging rate, Graphics (ON/OFF), Upper spec. limit, Lower spec. limit, and Setpoint ref er to a certain batch and will become valid as soon as this batch is called.

7.2 Database of the MiniTest 7400 FH

7.2.1 General Remarks

The database includes numerous features for data management. Measuring batches can be stored in directories and subdirectories. In total, as many as 500 directories may be created in a maximum of 5 levels. Directories and batches can be named alphanumer ically.

7.2.2 Tree structure

Example for a tree-structured database divided in directories and batches. At first use of the MiniTest 7400 FH, the database only includes one batch named “Direct Mode”. You can create other directories or batches as required.

Note: For creating new directories or batches, make sure to place

7.2.3 Create a Directory

the cursor below

this Direct Mode directory.

Press function key “ Main Menu”. Then select “Database” and press OK to confirm. Use arrow down key of the navigation block to place the cursor below “Direct mode” or, if other directories have already been created, to the requested posit ion where a new directory should be created. This may be below or between directories or batches. Now press function key “Actions” and press OK to confirm “New Directory” which is highlighted.

Enter a name in the alphanumerical input field. For more details, please refer to section 4.4.3 “Alphanum er ical Ent r ies”.

7.2.4 Create a New Batch

cursor to “New Batch” which is highlighted. Press OK to confirm.

From M easure Menu press function key “Main Menu”. Then select “Database” and press OK. Use arrow down key of the navigation block to place the cursor below “Direct mode” or, if other directories have already been created, to the req uested position where a new directory should be created. This may be below or between directories or batches. Now press function key “Actions” and move

Enter a name in the alphanumerical input field. For more details, please refer to section 4.4.3 “Alphanum er ical Ent r ies”.

After you have entered the bat ch name, the alphanumerical screen appears. Now you can enter a user name below the batch name according to the procedure as described above.

After completion of user name input, the confirmation as shown on the left appears. If you wish to accept the parameters (calibration and configuration) as set f or the act ive batch for t he new batch to be created press OK. If you press ESC, preset parameters of the factory calibration will become valid. Parameter settings can be made in the “Configuration” submenu. Please refer to section 10.4.3 for more details.

7.2.5 Select a Batch for Measurement

From Main Menu select “Database”. Use arrow keys to select the requested batch. Press OK to conf ir m . The data stored under this batch appear on display. Press OK to switch to Measure Menu.

7.2.6 Delete a Batch / a Directory

From Measure Menu press function key “Main Menu“ and select „Database“. Press OK to confirm . Use arrow keys to select the directory or batch to be deleted. Press function key “Actions”. Select “Delete” from the “Actions” submenu. A confirmation appears. Press OK to confirm or ESC to abort.

If you have chosen a directory, the delete action will only delete empty directories. If the directory includes subdirectories and batches, these must be deleted previously.

Please note: The batch “Direct Mode” is a permanent part of the database. It can neither be deleted nor r enam ed. Nor you can assig n a username to it. However, you can delete readings or statistical values.

Once you have deleted data they cannot be restored.

7.2.7 Rename a Batch / Rename a Directory

From Measure Menu press function key “Main Menu“ and select “Database“. Press OK to confirm . Use arrow keys to select the directory or batch to be renamed. Your selection will be highlighted. Press function key “Actions”.

Use arrow keys to go to “Rename”. Press OK t o confirm.

On the alphanumerical input field the name to be changed appears. This name can be changed (see section 4.4.3 “Alphanumerical Entries”.) This action will not change the usernam e.

8. Statistics

From Measure Menu press function key “Stat istics“ . From Main Menu use arrow keys to select “Statistics” and press OK to confirm.

8.1 Statistical Parameters

8.1.1 Upper and lower specificat ions limits (USL and LSL)

Tolerance limits can be set as requested and offer you the following featur es:

Readings beyond the specificat ion limits will be indicated by a signal tone and marked in the statistics.

The process capability indices Cp and Cpk will be calculated according to the set specification limits.

In the trend diagram and histog ram, readings lying within the set specification limits will be highlighted. This range will determ ine the real-t ime trend ( only available with MiniTest 7400 FH).

The specification limits can be set in the “ Configuration” submenu. . Use arrow keys to go to “Upper spec. limit ” and/ or “Lower spec. limit”

Specify limits and measur ing system (metric/imperial) as requested via the alphanumerical input field. See also section 4.4.2 “Alphanumerical Entries”.

Complete your setting by pr essing Function k ey “Ready”. The gaug e will check automatically whether your spec. limits are reasonable. This is to prevent input er rors such as entering a wrong measuring unit. Press OK to confirm your chang es. Spec. limits can be deleted via the function key “Delete”.

Spec. limits can be set before or after readings have been taken.

8.1.2 Set Point (Differential Mode)

In quality control, it may be interesting to measure the difference between a set point and the actual thickness. Once you have specified a set point, the difference between this set point and the actual thickness will be displayed. A set point must be entered BEFO RE storing t he f irst r eading . If you change a preset set point, the stored reading s m ust be deleted previously. The set point can be set in the “Conf iguration” submenu. Use arrow keys to g o to “Set point” and enter a value as requested along with the correct measuring system (metric/imperial) via the alphanumerical input field. See also section 4.4.2 “Alphanum er ical Ent ries”. Complete your setting by pressing Function key “Ready”. Set point set tings can be deleted via the function key “Delete”.

8.2 Readings

8.2.1 View Readings

From Main Menu go to “Statistics”. Press OK and select “Readings” submenu. From Measure Menu press function key “Stat istics”. Then press function key “Batch” followed by function key “Readings”.

Use arrow keys to scroll through the batch as requested. Readings will be indicated along with their current reference number. If spec. limits have been set previously, information is included whether the readings have been above (>>) or below (<<) the spec. limit.

8.2.2 Delete Single Readings

Erratic readings may be deleted from the list. Move the cursor to the reading to be deleted.

Press function key “Help/Extra”. Move cursor to “Delete Readings” and press OK to confirm or press ESC to abor t.

Readings that have been deleted are marked by (X).

8.2.3 Delete all Readings

From Main Menu chose “Statistics“. Use arrow keys to move to “Delete all readings“. Press OK to confirm.

From Measure Menu press function key “Statistics” followed by function key “Help/Extras”. Use arrow keys to move to “Delete all readings“. Press OK to confir m.

To abort, press ESC.

The delete action will delete all readings of the active batch. Batch name, sensor config uration and calibration for this batch will remain in memory.

8.3 Numerical Statistics

From Main Menu chose “Statistics“. Use arrow keys to move to “Numerical Statistics”. Press OK to confirm. From Measure Menu press function key “Stat istics” .

Number of readings Average (

) Standard deviation (s) Minimum Maximum Variation coefficient Process capability indices Cp and Cpk (if spec. limits have been set).

For more detailed information on statistics please refer to section

15.3.

8.4 Histogram on MiniTest 7400 FH

From Main Menu chose “Statistics“. Use arrow keys to move to “Histogram“. Press OK to confirm. From Measure Menu press function k ey “Stat ist ics” followed by function key “Histogram”.

A histogram is a kind of plot that summarizes how data are distributed. It gives you information on how the production process might be changed in order to be optim ized.

The limit range is t he gray-highlighted area. See also 8.1.1 “Upper and lower spec. limits”.

Please note: For a histogram, a minimum number of 5 readings are required.

8.5 Trend Diagram on MiniTest 7400 FH

From Main Menu chose “Statistics“. Use arrow keys to move to “Trend Diagram“. Press OK to confirm. From Measure Menu press function key “Statistics” followed by function key “Histogram”. Then press function key “Trend”.

A trend illustrates the tendency of reading s so that deviations can be quickly identified.

The limit range is the gr ay-highlighted-area.

For a trend-diagram, at least 5 r eadings are required.

9. Data Output / Data Transfer

Both models, MiniTest 7200 FH and MiniTest 7400 FH are equipped with a bi-directional RS232 interface and an infrared interface (IrDA 1.9). Readings and statistics of a batch can be transferred to a PC or to the MiniPrint 7000 data printer (available as an option).

9.1 Data Print-Out

Data transfer of readings and statistics to the data pr inter MiniPrint 7000 is made via the infrared interface (IrDA 1.0). Before printing out, go to the Main Menu and select “Setup”. Use arrow keys to move to “Data Output” and press OK to conf irm. Use arrow keys to select “Infrared (IrDA)”. For more details, please refer to sect ion 10. 5.4.2.

Readings and statistics may be printed out from all statistical views such as statistics, batch, histogram or trend (MiniTest 7400 FH). Press “Help/Extra” Function key from your selected st atistical view. The Help/Extra window opens (Fig. 1)

Fig. 1

Fig. 2

Select “Print” form t he list and confirm by “OK”.

A “Printing sequence” menu opens (Fig. 2) Move the cursor to the first item on the list and press OK. Use arrow keys to make your selection (Fig. 3). The following options are available:

Logo (Company logo or other customized logo in graphics format (160x80 Pixel). For inserting such logo, MSoft 7000 software is required.

Name (of batch) / or name (of batch) + date (MiniTest 7400 FH).

Operator (with MiniTest 7200 FH Notes-Field only)

Statistics (number of readings, Average (x) Standard deviation (s), Min., Max. Variation Coefficient, Cp and Cpk ) .

Measuring Values or Measuring Values + Deleted Values (see also section 8.2.2).

Trend (MiniTest 7400 FH only)

Fig. 3

Histogram (MiniTest 7400 FH only)

Notes-Field (space for remarks with 5 lines)

----- (remains empty)

Press OK to confirm your selection and go t o the next position on the printing list and proceed as described above.

The print-out list can also be limited to fewer items (e.g. statistics and measuring values only, Fig. 4)

Fig. 4

Now align the infrared windows of the MiniTest and MiniPrint 7000. Press function key “Print” to start t he print-out. To abort, press “ESC”.

9.1.1 Screen Shot

Please refer to section 11.2 “Special f unctions“.

9.1.2 Print-out a Batch

Please refer to section 9.1 “Data Pr int - out ”

9.2 Transfer Data to a PC

Before transferring data, go to the Main Menu and select “Setup”. Use arrow keys to move to “Data Output” and press OK to confirm. Use arrow keys to select “RS232 cable” or “Infrared (IrDA). Press OK to conf irm. See also section 10.5.4. I f you adjust to RS232, please make sur e to make the correct settings for baud r at e and t r ansmission protocol.

Readings and statistics may be transferred to a PC from all statistical views such as statistics, batch, histogram or trend (MiniTest 7400 FH). Press “Help/Extra” Function key from your selected statistical view. The Help/Extra window opens (Fig. 1) Select “Print” form t he list and confirm by “OK”.

A “Printing sequence” menu opens. Move the cursor t o the first item on the list and press OK. The following options ar e available:

Name (of batch) / or name (of batch) + date (MiniTest 7400 FH).

Statistics (number of reading s, Average (x) Standard deviation (s), Min., Max. Variation Coefficient, Cp and Cpk ) .

Measuring Values or Measuring Values + Deleted Values (see also section 8.2.2).

Operator (with MiniTest 7200 FH Notes-Field only)

----- (remains empty)

Press OK to confirm you selection. Connect the MiniTest FH via the RS232 cable to your computer or

align the infrared windows of your computer or of your IrDA adapter respectively. Then press Function key “Send->PC”.

To abort, press “ESC”.

Please note

: The “MSoft 7000 Pro” software recalculates the

histogram and trend diagram (MiniTest 7400 FH oly) and optimizes

their display in graphical format.

10. Main Menu

10.1 Database

Please refer to section 7.2.

10.2 Statistics

Please refer to section 8.

10.3 Calibration

Please refer to section 6.

10.4 Active Batch

10.4.1 Batch Properties

From Main Menu chose “Active Batch” and press OK to confirm. Now you can select from the options as shown on the left.

Select “Batch properties” and press OK to conf ir m. Now you can view: Batch name (with MiniTest 7400 FH) Create date, Modified date

User name. Press function key “Statistics” to view the statistics of t his batch..

10.4.2 Readings

10.4.3 Configuration

This menu is for viewing readings. To view the corresponding statistics, press function key “Batch” followed by function key “Statistics”. See also section 8.

In this menu you can set the following parameters to define your batch as requested:

Target ball size (see section 5.2.2) Data logging mode (see section 5.5) Logging rate (see 5.5) Graphics on/off (see sect ion 4. 3. 2)

10.4.4 Calibration

Upper spec. limit (see section 8.1.1) Lower spec. limit (see section 8.1.1) Set point (see section 8.1.2)

Please refer to section 6.

10.5 Setup

10.5.1 General Remarks

In this menu both models, MiniTest 7200 FH and 7400 FH can be adjusted to customer requirements.

From Measure Menu press function key “Main Menu”. Use arrow key to select “Setup”. Press OK to confirm.

Use arrow keys to go to the requested item and pr ess O K t o conf ir m.

10.5.2 Display

In this menu you can adjust the backlight of display and keys (on/off); brightness and contrast). Please refer to section 4.4.1 for more details.

10.5.3 Date and Time

In this menu you can adjust date and time, day, month and year. Please refer to section 4.4.1 for more details. The gauge f eatures a quartz-controlled time clock . The current time is displayed on the top right of display. If connected to the data printer or for PC evaluation, t he create date and time and date and time of last modification may be included on the bat ch r eport.

10.5.4 Data Outputs

In the “Data Output” menu you can choose RS232 cable or Infrared (IrDa). Please refer to section

4.4.1 for more details.

10.5.4.1 Data Output RS232 Cable

If “RS232 Cable” has been selected, you can adjust the data f ormat to the requested baud rate:

57600 (default), 38400, 19200, 9600

The settings 8 data bits, 1 Stop- Bit , No Par it y do not change.

The Transmission Protocol option must be “off” when using the Msoft 7000 Basic. (Description of transmission protocol available on request).

If you have adjusted to “RS232 Cable“, you cannot connect a footswitch, charger unit or alarm device to the multi-purpose socket.

10.5.4.2 Data Output Infrared (I rDA)

If you have adjusted to “Infrared (IrDA)”, data transmission to the MiniPrint 7000 data printer or to a PC will be wireless.

In this setting, you can connect a footswitch, power supply unit or alarm device to the multipurpose socket. If a footswitch has been connected, a power unit and an alarm device may be connected to the footswitch. Via the footswitch you can “Save” readings to the statistics or “delete” Minimum and Maximum values during measurement.

The duration of the alarm signal can be adjust ed individually so that you are able to distinguish the alarm signals for exceeding upper

specification limit and lower specification limit . The duration can be adjusted to 50, 100, 150, 200, 250, 300, 350, 400 ms or to

10.5.5 User Preferences

accepted

permanent signal.

In the User Preferences menu the following settings can be made:

Language

Measuring system (metric / imperial)

Loudspeaker (ON/OFF).

Signal Volume (low, high, medium)

Auto Switch OFF (after 1, 3, 10, 30 m inut es, disabled)

Entry accepted (numeric or alphanumeric entries (after 0,5, 1, 1,5 or 2 seconds) .

Modification lock**

** You can assign a password for the Modification lock (pay attention to upper and lower case so that the modification lock will be password protected. If you have forgotten the password you can

10.5.6 Gauge Specifications

make a total r eset. Please note: a total reset delet es all r eadings and settings stored in memory. Please also ref er to section 4.4.1.

From Setup Menu use arrow keys to go to “Gauge Specs“. Pr ess O K to confirm. Now you can view gauge specifications.

For viewing sensor data press function key “Sensor”.

In case of service requests please make available these data for further reference.

11. Special functions

11.1 Initializing

At first use or on demand the initializing sequence may be called. Press ON/OFF button and ESC simultaneously to g o t o the initializing sequence. A language flag symbol appears. Use arrow keys to make your selection. Press OK to confirm or ESC to abort. Now a Total Reset query appears. Press “No” if you do not wish to perf or m a T otal Reset to delete all data.

Attention!

Pressing “Yes“ will irrevocably delete all data and settings stor ed in memory. However, your language setting remains and the g auge will be reset to factory setting. All directories and batches will be deleted along with their readings, statistics and calibration values. Press ESC to abort the Total Reset process. Only the language settings remain in memory.

11.2 Special functions Press ON/OFF button for more than one second while the gaug e is switched on. Now a Special

functions menu appears with the following setting options:

Print Screen (print-out of screenshot on MiniPrint 7000 data printer)

Backlight (of display and keyboard) ON

Backlight (of display and keyboard) OFF

Metric system

Imperial system

All these setting options except the Print Screen item may also be accessed via the menu system. The Special functions menu is meant for quick access to these functions at any time during operation. To quit the Special f unctions menu and to g o back to your current operation, press OK to confirm your setting or ESC.

12. Quick Reference

Target Ball Size

Uppers spec. limit

Lower spec. limit

Calibration

Database

Statistics

Calibration

Active Batch

Setup

Main Menu

Statistics

Measu

re Mode

Auto Switch OFF

Entry accepted

Language

Meas. System

Minute

Day

Month

Readings

Delete all Readings

Numerical Statistics

Target Ball Calibration Mode

(MiniTest 7400 FH only)

Backlight

Brightness

Contrast

Year Hour

Data output

Loudspeaker Signal Volume

Modification lock

Display Date / Time Data Output User Preferences Gauge Specs

Batch properties Readings Configuration

Calibration Meas. Mode Data logging mode

Logging rate Graphics

Set point

Histogram Trend diagram

(MiniTest 7400 FH only)

13. Care and Maintenance

13.1 Care

Use a soft damp cloth with water or a mild detergent t o clean t he gauge and accessories.

Caution:

Do not use solvents because they might damage the plast ic parts. Do not use metal brushes or other tools for cleaning the sensor tip.

13.1.1 Using NiMH storage batteries

To achieve optimal service life of the NiMH storage batteries, please respect the following instructions.

• Make sure to use the full battery capacity before your r echarg e it. Fr eq uent short discharge and recharge cycles prematurely reduce their service life.

• The storage batteries should always be fully recharged. Avoid prematur e interr upt of reload process, otherwise batteries may not be recharged to their full capacity any more.

• Try to save battery lif e e. g. by operating the MiniTest 7200 FH / 7400 FH in Auto Switch off mode, instead of continuous service.

13.2 Maintenance

Generally, no maintenance work is required for MiniTest 7200 FH / 7400 FH.

Please note: Repairs may only be carried out by authorized ElektroPhysik staff.

14. Technical specification

14.1 Gauge and Sensor Specification

Measuring principle:

Measuring rate: 20 readings per second (factory set)

Number of readings to be logged for statistics:

Sensor types: FH4 FH10

Low range resolution: 0.1 µm 0.2µm

Display resolution Ranges Resolution:

magneto-static principle, suitable for nonmagnetic materials

1, 2, 5, 10 or 20 readings per second (user adjustable)

0.0 µm – 59.9 µm

60.0 µm – 149.9 µm

150.0 µm – 299.5 µm

300.0 µm – 599.0 µm

600.0 µm – 998.0 µm

1.000 mm – 1.498 mm

1.500 mm – 2.995 mm

3.00 mm – 5.99 mm

6.00 mm – 10.12 mm

0.1 µm

0.2 µm

0.5 µm 1 µm 2 µm 2 µm 5 µm 10 µm 20 µm

FH4 Sensor

Target ball Ø

1.5 mm 0 ... 1.5 mm ± (1.5 µm + 0.5%)* ± (10 µm + 3%)* ± (5µm + 1.5%)* ± (3µm + 1%)*

2.5 mm 0 ... 2.5 mm ± (2.5 µm + 0.5%)* ± (15 µm + 3%)* ± (8µm + 1.5%)* ± (5µm + 1%)*

4.0 mm 0 ... 4.0 mm ± (5 µm + 0.5%)* ± (30 µm + 3%)* ± (15µm + 1.5%)* ± (10µm + 1%)*

FH10 Sensor

Target ball Ø

2.5 mm 0 ... 2.5 mm ± (2.5 µm + 0.5%)* ± (15µm + 3%)* ± (8µm + 1.5%)* ± (5µm + 1%)*

4.0 mm 0 ... 4.0 mm ± (5 µm + 0.5%)* ± (30µm + 3%)* ± (15µm + 1.5%)* ± (10µm + 1%)*

6.0 mm

9.0 mm 0 ... 10 mm ± (10 µm + 0.5%) * ± (50µm + 3%)* ± (30µm + 1.5%)* ± (20µm + 1%)*

Measuring range

0 ... 6 mm ± (10 µm + 0.5%)* ± (50µm + 3%)* ± (30µm + 1.5%)* ± (20µm + 1%)*

6 ... 10 mm ± 0.5%* ± 4%* ± 2.5%* ± 1.5%*

Reproducibility

Measurement on horizontal surfaces, mean value calculated from a minimum of 10 readings

Factory

calibration:

Factory

calibration:

• All percentages are related to the measuring value

Tolerance: Zero-point

calibration

Tolerance: Zero-point calibration

Multi-point calibration

Multi-point

calibration

Calibration modes:

Display: LCD 160 x 160 pixel, backlit (user adjustable)

Measuring system: metric (µm, mm) and imperial (mils)

Statistics functions: Single readings, number of readings, min, max, average, standard deviation,

Factory calibration, Zero point calibration and multi-point calibration ((Zero plus 1 to 4 calibration points)

variation coefficient and process capability indices Cp and Cpk (only available with MiniTest 7400 FH)

Data memory:

Maximum number of directories:

Maximum number of batches:

Maximum number of readings:

Differential mode:

Statistics:

Languages: English, German, French, Italian, Spanish, Portuguese

Interfaces: IrDA, 1.0, Multi-purpose socket for RS232 TTL, footswitch, power supply unit and

Operating temperature: -10°C to + 60°C

Storing temperature: -20°C to + 80°C

Protection class of gauge housing:

Dimensions and weight of gauge: 153 mm x 89 mm x 32 mm / 310 g including batteries

7200 FH 7400 FH 0 500 subdivided into 5 levels 1 200

100.000 240.000 Display of the difference between current reading and preset set point 7200 FH:

numerical

alarm device

IP 50

7400 FH: numerical, histogram, trend diagram

Dimensions and weight of FH 4 sensor

Dimensions and weight of FH 10 sensor:

Dimensions of plastics carrying case:

Power supply: 4 x 1,5 V LR 6 – AA baby cells, Power supply unit (90 to 240V AC /

Ø 17 mm x 96 mm / 90 g

Ø 30 mm x 125 mm / 300 g

365 mm x 450 mm x 140 mm

48 - 62 Hz)

14.2 Delivery Schedule

14.2.1 Thickness gauge MiniTest 7200 FH / 7400 FH

Description

Thickness gauge MiniTest 7400 FH for non-magnetic materials 80-176-0000 or Thickness gauge MiniTest 7200 FH for non-magnetic materials 80-177-0000 including:

Instruction manual in German/English/French on CD-Rom Short instructions 4 x batteries AA (LR06), Plastics carrying case, rubber protection case with positioning device and shoulder belt, 1 magnetic screwdriver

Order number

14.2.2 Sensors

Description

Sensor FH4 for thickness measurement measuring range: 0 ... 4.0 mm

including: shielding tube 3 precision standards 0.25 mm, 1 mm, 3 mm 1 zero calibration standard for the target balls with 1.5 mm, 2.5 mm, 4 mm dia. (1 zero calibration standard per size) 1 spring loaded sensor stand 1 set of target balls with 1.5 mm and 2,5 mm dia.(100 balls each size) 1 set of target balls with 4 mm dia (50 balls)

Order number

80-174-0000

Sensor FH 10 for thickness measurement measuring range: 1…10.0 mm

including shielding tube 3 precision standards 1 mm, 3 mm, 8 mm set of zero calibration standards for the target balls with 2.5mm, 4mm and 6mm dia. (1 pc each ball size) 1 spring-loaded sensor stand 1 set of target balls with 2.5 mm dia. (100 balls) 1 set of target balls with 4 mm dia (50 balls) 1 set of target balls with 6 mm dia (25 balls)

80-175-0000

14.3 Accessories Description

Order number

Data printer MiniPrint 7000 incl. charger unit Quick charger for NiMH storage batteries NiMH storage baby cells, AA HR6 1,2V (4 pcs required for MiniTest FH) Baby cells AA LR6 1,5V (4 pcs required for MiniTest) Power supply unit Footswitch for storing readings into the data memory, incl. adapter unit for mains operation Rubber protection case with positioning device (included in standard supply schedule) Belt for rubber protection case Case with shoulder belt for MiniTest 7200 FH / 7400 FH Plastics carrying case (incl. in standard supply schedule) Dust protection pouch IR / USB converter IR/RS232 converter Connecting box for footswitch, USB, power unit, alar m deice, headphones

80-202-0000 02-070-0001 02-064-0001 02-064-0008 80-900-0004 80-901-1800

82-010-0003

82-010-0016 82-010-0007 82-020-0033 85-199-0001 85-139-0014 85-139-0013

MSoft 7000 basic data transmission software MSoft 7000 pro data management soft ware

80-901-1600 80-901-xxxx

Manufacturer’s Test Certif icat e accor ding to DIN 55350 M for gauges and sensors

Accessories for sensor FH4

Sensor stand, spring-loaded, for s Sensor FH4 (incl. in standard delivery) 70-174-0015

Zero calibration standard for FH4 sensor 1. 5 mm dia. target ball (stand. delivery) 82-174-0024 Zero calibration standard for FH4 sensor 2. 5 mm dia. target ball (stand. delivery) 82-174-0025 Zero calibration standard for FH4 sensor 4 mm dia. target ball (stand. delivery) 82-174-0026

Precision standard for sensor FH4 0.3 mm (standard delivery) 82-174-0020 Precision standard for sensor FH4 1 mm (standard delivery) 82-174-0021 Precision standard for sensor FH4 3 mm (standard delivery) 82-174-0023

1 set precision standards for sensor FH 4 for multi-point calibration for 1.5 mm dia. target ball size, comprising: 1 precision standard set for approx. 0.15 mm, 0.25 mm, 0.43 mm, 0.75 mm and

1.3 mm 1 set precision standards for sensor FH4 for multi-point calibration for 2.5 mm target ball size, comprising: 1 precision standard set for approx. 0.25 mm, 0.43 mm, 0.75 mm, 1.3 mm and

2.2mm (1 pc each) 1 set precision standards for sensor FH4 for multi-point calibration for 4,0 mm target ball size, comprising: 1 precision standard set for approx. 0.43 mm, 0.75 mm, 1.3 mm, 2.2 mm and

3.6mm ( 1 pc each)

1 set of target balls, 1.5 mm dia. (100 pcs) 82-174-0004 1 set of target balls, 2.5 mm dia. (100 pcs) 82-175-0004 1 set of target balls, 4 mm dia. (50 pcs) 82-175-0005

Manufacturer’s Test Certificate according to DIN 55350 M for precision standards Manufacturer’s Test Certificate according to DIN 55350 M for 1 set precision standards for multi-point calibration

82-174-0010

82-174-0011

82-174-0012

Accessories for sensor FH10

Sensor stand, spring-loaded, for s Sensor FH 10 (incl. in standard delivery) 70-175-0014 Zero calibration standard for FH 10 sensor 2. 5 mm dia. target ball (standard

delivery) Zero calibration standard for FH 10 sensor 4 mm dia. target ball (standard delivery) Zero calibration standard for FH 10 sensor 6 mm dia. target ball (standard delivery) Zero calibration standard for FH 10 sensor 9 mm dia. target ball (standard delivery)

Precision standard for sensor FH10 1 mm (standard delivery) 82-175-0030 Precision standard for sensor FH10 3 mm (standard delivery) 82-175-0031 Precision standard for sensor FH10 8 mm (standard delivery) 82-175-0032

1 basic calibration set for sensor FH10 for target ball dia. 9.0 mm, comprising: Zero calibration standard, and 10 pcs target balls 9 mm dia., comes in a plastics box

1 set precision standards for sensor FH10 for multi-point calibration for target ball dia. 2.5 mm, comprising: 1 set precision standards approx. 0.25 mm, 0.43 mm, 0.75 mm, 1.3 mm and

2.2mm

82-175-0033 82-175-0034 82-175-0035 82-175--0036

82-175-0038

82-175-0020

1 set precision standards for sensor FH10 for multi-point calibration for target ball dia. 4.0 mm, comprising: 1 set precision standards approx 0.43 mm, 0.75 mm, 1.3 mm, 2.2 mm and 3.6 mm 1 set precision standards for sensor FH10 for multi-point calibration for target ball dia. 6.0 mm, comprising: 1 set precision standards approx 1.0 mm, 1.7 mm, 3.0 mm, 5.2 mm and 9.0 mm 1 set precision standards for sensor FH10 for multi-point calibration for target ball dia. 9.0 mm, comprising: 1 set precision standards approx 1.0 mm, 1.7 mm, 3.0 mm, 5.2 mm and 9.0 mm

82-175-0017

82-175-0010

82-175-0037

1 set of target balls, 2.5 mm target ball size (100 pcs) 1 set of target balls, 4 mm target ball size (50 pcs) 82-175-0005 1 set of target balls, 6 mm target ball size (25 pcs) 82-175-0006 1 set of target balls, 9 mm target ball size (10 pcs) 82-175-0014

Manufacturer’s Test Certificate according to DIN 55350 M for precision standards Manufacturer’s Test Certificate according to DIN 55350 M for 1 set precision standards for multi-point calibration

82-174-0004

15. Appendix

15.1 Troubleshooting

Error message Problem Remedy

“Please check clock settings“ If you insert batteries at initial use

or if the gauge has been cut from power supply for more than 5 minutes

Reset clock (s. section 10.5.3)

“Low Bat !!!” Though you can continue to

measure, it is recommended to change batteries. If battery voltage is below minimum, the gauge will switch off

automatically. “Please hold probe in air(infinite range) !! “

(Briefly appears on display at switch on)

“Confirm sensor in infinite range” a) a target ball is placed on the

Please check

a) whether you have removed the

shielding tube or protection cap

b) whether a target ball is

positioned on the sensor tip

c) whether the sensor tip is in

contact with a steel part

ElektroPhysik MiniTest 7200 FH, MiniTest 7400 FH Technical Manual And Operating Instructions

Specifications and Main Features

Frequently Asked Questions

User Manual