Scales and Balances (Simple) Test Type

Scales and Balances (Simple) Test Type

1.1 Test Types

ProCalV5 allows for the addition of different “Test Types” to the database that may be applied to any item master record whose required calibration does not fit perfectly into the typical ProCalV5 template.  Test Types may be used to provide specific testing in addition to or instead of a standard calibration with target set points and As Found/As Left readings.  Examples of some calibration Test Types that ProCalV5 normally could not accommodate efficiently are Extreme Values, Linearity and Standard Deviation tests.

 

1.1.1 Set Up Test Type Packages Screen

The Set Up Test Type Packages screen (shown in Figure 1) is used to add, modify and if necessary delete Test Type packages from the database.  This screen is invoked by selecting the “Set Up Test Type Packages…” option on the File menu when the System Options and Defaults screen is open.

Figure 1

 

1.1.2 Adding New Test Types

To add a new Test Type to your database you must first copy the required library file “ScaleBalanceSimple.bpl” into the folder labeled “bin” under the ProCalV5 directory (typically “C:\Program Files\Prime Technologies\ProCalV5\bin”) in Windows Explorer.  The “ScaleBalanceSimple.bpl” file contains all the information necessary for the Test Type’s automatic and proper setup in ProCalV5.  Once the file has been copied into the correct folder you may launch the Set Up Test Type Packages screen.  Once the screen is open you may click the Add New Record button or select “New Record” from the screen’s File menu.  This will invoke a browser screen titled Choose New Package File that automatically directs you to the “bin” folder in which all the “.bpl” files reside. Select the required file “ScaleBalanceSimple.bpl” and click the Open button or double-click the file name.

 

Once the correct file has been selected you will be returned to the new Test Type record which will already be set up for you.  In this instance you can save the record, making it available for application to all types of item master records in the system (i.e. Instruments, Loops, Systems, Test Instruments, in addition to any PM records that may require a calibration).  Once a Test Type has been saved to the database, as long as it is marked as “Active”it will be available for selection on the Test Type field’s drop-down list on the Calibration Points tab in all screens where that tab exists.  

 

Although you will have no ability to change the Test Type’s calibration requirements, you do have the ability to make some customizations to it in terms of field label changes and also giving users the ability to edit target set points and such when entering calibrations using that Test Type.  Please reference the ProCalV5 User Manual, Section 8.

 

1.1.3 Distributing Test Types

Test Types only need to be installed in the System Option and Defaults screen once, but for all Client, Administrator, or Mobile Workstations, the “ScaleBalanceSimple.bpl” file must be present in the “bin” directory one level down from the ProCalV5 installation directory.

 

1.1.4 Definitions for the Scales and Balances Test Type Package

·        Spec Limit– Calibration Tolerance Limit: This describes the standard limit of passing or failing each section of the test. A measurement or calculation is considered to be failed if it is outside of this limit.

·        LSDU – Least Significant Digit Unit: This number defines the unit of the Spec Limit. For example, if the LSDU is 0.001 g and the Spec Limit is 5 for the Corner Test, the actual limit is +/- 0.005 g.

 

 


 

 

 

1.1.5 Entering Item Records Using the Scales and Balances Test Type Package

When creating a new master record that uses the Scales and Balances Test Type, the Test Type must be applied to the record through the Calibration Points tab on the master record screen.  Once a new group has been added to the record, click the Test Type drop-down list and select Scales and Balances from the available Test Types, as shown in Figure 2:

 

      Figure 2

 

 Once the Test Type has been selected, the inputs will change according to the settings defined by the library file.  This test verifies the accuracy of a Scale or Balance.  The test is configured by specifying the unit of Measurement and Accuracy of the device being tested and setting the Limits for the various tests.  Collection of calibration data involves 3 tests on the device; a Zero Check, a Repeatability Test and a Corner (Shift) Check [the tester has the option of not performing the Corner (Shift) Test]. All tests must pass for the calibration to be considered successful. The Test Type inputs used in this test should be entered through the Group Options box, which can be accessed by clicking the Show Group Options button on the right side of the screen. This interface is shown in Figure 3.

The inputs are as follows:

·       Capacity –

Capacity value [This is for information only]

·       Corner (Shift) Spec Limit –

Decimal value for the Spec Limit for the Corner (Shift) test. Expressed in # of LSDUs. This is a +/- from the Center Reading..

·        Repeatability Spec Limit –

Decimal value for the Spec Limit for the Repeatability test. Expressed in # of LSDUs. This is the maximum allowable Standard Deviation of the readings

·       Repeatability Readings –

This is the number of readings that will be taken during the Repeatability Test

·       Zero Check Readings –

This is the number of readings that will be taken during the Zero Check Test

·        Zero Check Spec Limit –

Decimal value for the Spec Limit for the Zero Check test. Expressed in # of LSDUs. This is the maximum deviation from zero.

 

              Figure 3

            

Field Omissions - All Test Group fields will be eliminated except for Output

                  Resolution and Output Signal Type. All Grid Fields will be eliminated

 

Field Re-labeling - Output Resolution will be re-labeled ‘LSDU Res’ (LSDU stands for

                               Least Significant Digit Unit. This field value is the number of decimal

                               places used for all measurement readings and the LSDU value.).Plus /

                               Minus field will be relabeled ‘LSDU’. Output Signal Type will be

                               labeled ‘Unit of Meas’. See Figure 4 below.

 

Note: The Calculate and Restore Defaults buttons are not accessible and serve no function for the Test Type.

 

              Figure 4

 

 

1.1.6 Entering Calibration Records

Once a Master record is created that uses the Scales and Balances Test Type, the Calibration data can be entered on the Test Results tab of the Calibration record. See figure 5 below:

                                                                                                                                                               Figure 5 

 

Clicking the View/Enter Data button the Scale/Balance Test Data screen appears. As Found readings may be entered for the Zero Check, Repeatability, and Corner (Shift) See Figures 6 -9.  

 

1.1.7 Tabbed Notebook Section

The tabbed notebook section of the Scale/Balance Test Data screen contains three (3) different sub-screens or “pages” available for data entry.  These pages are logically grouped on the tabs of the notebook.  Each page and its associated fields are described below.   To open a page, click its tab with your mouse. 

1.1.8 Zero Check Tab

This tab page (Figure 6) may be used to enter data for the Zero Check test.  In the fields provided you may type the Warm-Up Time (optional), Tare Reading, Weight Applied, As Found, and As Left readings. After entering the data, if you wish to save the record, click the Apply button. Click the Close button to close the screen without saving your changes.

 

The Warm-Up time is formatted as follows: HH:MM:SS, where MM < 60; SS < 60

 

 Note: Tare Reading and Weight Applied do not have separate values for As Found and As Left. One value is stored for both As Found and As Left.

The As Left Entered check box controls the As Left Entered output value of the related test. When unchecked, the related As Left test entry section of the tab will read “Same as As Found” for all applicable fields.

 

You may use the As Found and As Left buttons in the Data View box to view or enter readings for the Trials.

 

                                                                                                                                                                   Figure 6                        

1.1.9 Repeatability Tab

This tab page (Figure 7) may be used to enter data for the Repeatability test.  In the fields provided you may enter the Warm-Up Time (optional), Tare Reading, Weight Applied, As Found, and As Left readings. After entering the data, if you wish to save the record, click the Apply button. Click the Close button to close the screen without saving your changes.

 

After entering the readings for the Repeatability test and selecting the Apply button, the Mean and Standard Deviation will be displayed. The Calculations are as follows:

o   Mean: ā = (a1 + a+ a+ … + an) / n

o   Standard Deviation: Ss  = √∑(ai - ā)2 / (n - 1)

 

The As Left Entered check box controls the As Left Entered output value of the related test. When unchecked, the related As Left test entry section of the tab will read “Same as As Found” for all applicable fields.

 

You may use the As Found and As Left buttons in the Data View box to view or enter readings for the Trials.

 

                                                                                                                                                                  Figure 7

1.1.10 Corner (Shift) Tab

This tab page (Figures 8 & 9) may be used to enter data for the Corner (Shift) test or you may select the checkbox Skip Corner Test. If you elect to skip the Corner test you will be required to enter a reason. In the fields provided you may type the Warm-Up Time, Weight Applied, Center Reading, As Found, and As Left readings. After entering the data, if you wish to save the record, click the Apply button. Click the Close button to close the screen without saving your changes.

 

After entry of the Center reading and Spec Limit High and Low Limit columns (read-only, display-only) will be populated next to each Position reading.

 

The Pan Design  displays the value select from the Test inputs

 

The As Left Entered check box controls the As Left Entered output value of the related test. When unchecked, the related As Left test entry section of the tab will read “Same as As Found” for all applicable fields.

 

You may use the As Found and As Left buttons in the Data View box to view or enter  readings for the Trials.

 

Note: If you enter data onto the Corner (Shift) Tab and then elect to check the Skip Corner Test checkbox, all data will be erased.

                                                                                                                                                                   Figure 8

 

                                                                                                                                                                    Figure 9

1.1.11 Pass/Fail Criteria

All Tests will have As Left Data record if there is an As Found failure.  Pass / Fail criteria is the same for both As Found & As Left

 

Zero Check

      All reading within ± (Zero Check Spec Limit * LSDU)

Repeatability Check

      Calculated Standard Deviation Ss  ≤ (Repeatability Spec Limit value * LSDU)  

Corner Test

      Spec Limit = Corner (Shift) Spec Limit * LSDU

      (this is to express the Spec Limit as the unit of measure.)

      Spec Limit ≤  (Center Reading – Corner Reading)  ≤ Spec Limit

 

Any As Found Failure occurs: Group’s As Found Status is set to Failed, otherwise Passed. If Failed, the technician can adjust it.

Any As Left Failure occurs: Group’s As Left Status is set to Failed, otherwise

Passed.

 

 

 
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