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Quarterly Sensitivity Test

1. Recording a weight in the weight database

2. Defining the test sequence

2.1 Defining the method

2.1.1 Defining Weight 1

2.1.2 Defining additional test sequence parameters

3. Defining the task

3.1 Automatic call-up

3.2 Defining manual call-up

4. Activating the Test Sequence function key

Contents

In accordance with the Good Weighing Practice (GWP), our customer works in the field of quality control procedures in the chemical industry.

All balances are subjected to a quarterly intensive calibration test (sensitivity test) with two test weights. The customer wants to have a test request from the balance that he can postpone for up to a maximum of 4 days.

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Summary

In accordance with the Good Weighing Practice (GWP), our customer works in the field of quality control proce-dures in the chemical industry.

All balances are subjected to a quarterly intensive calibration test (sensitivity test) with two test weights. The custo-mer wants to have a test request from the balance that he can postpone for up to a maximum of 4 days.

Introduction

Would you like to check the sensitivity of your balances on a quarterly basis with a specially designed test weight? The specifications are as follows:

The first test weight corresponds to the maximum load of the routine work. The second weight corresponds to the typical net weight (approx. 5% of the maximum load). The test must be carried out within +/- 2 days every three months. The operator can postpone the test for 24 hours. All tests are to be recorded and documented in the operations log. 0.1% is set as test requirement.

The user must inform the supervisor if the test requirements are not met; the balance must be clearly marked and subsequently checked by a balance specialist.

The system may be used again once it has been ensured that the balance operates perfectly. The proposed settings are based on the English menu settings.

2Information METTLER TOLEDO

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We recommend the following settings in the balance menu for the Excellence Balance Line. In order for the test sequence to be defined, the corresponding test weights should first be recorded. Both test weights are available in the Weights Set CarePac along with the required tools.

Recording a weight in the weight database

In order to define the test sequence, the appropriate test weight must first be recorded. The test sequences are in the following Adjust/Test menu:Weighing Mode > User Settings > System > Adjust/Test

Open a new test weight:Adjust/Test > [Test/Adjust Weights Define] > [Test Weight 1Define] > Test/Adj. Weight Setup

Test/Adj. Weight Setup

Transfer the data from the weight certificate to the menu fields.

A name which is unique for the user must be selected as a name for the test weight.

Save your settings by pressing [ok] and repeat the sequence in accordance with Item 1 Recording a weight in the database in order to record the second test weight (10g QC). Afterwards, exit the Test/Adjust Weight menu: Test Weight 1 [ok] > Test/Adjust Weights [ok] > Adjust/Test

1.

Test/Adj. Weights 1 Setup

Name 200g QC

Weight-ID 155 753 C

Class F2

Certification No. 45A88

Weight Set Number 4582E2

Actual Value 200.0012 g

Next Recalibration 21.06.2010

[ok]

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Defining the test sequence

After the required test weights have been entered, a new test sequence is opened. The test sequences are in the following menu:Adjust/Test > [Test Sequences Define] > Test Sequences

Open a new test sequence by defining an unassigned test sequence.Test Sequences > [Test Sequence 1 Define] > Test Sequence Setup

Test Sequence Setup

Select a unique name. The selected name will appear later in the dialogs, in the report and also in the menus as a heading.

In order to fulfill the preparation measures in an operating procedure (SOP), it is recommended that you select Standard in the Preparation Instructions menu field. Prior to the actual test, this instruction prompts the operator to level and clean the balance.

Defining the method

In the test sequence, the SE1 method (Sensitivity Test with 1 test weight) is selected as the method.Test Sequence 1 > [Method Define] > [on SE1 Define]

The SE1 method has one test weight as a parameter and it is essential to define this now.

Defining Weight 1

SE1 Setup > [Test Weight 1 Define]

Select the previously defined test weights from the list.Test Weight 1 > [Test/Adj. Weights Define] > [200 g QC]

Back in the Test Weight menu, define the accompanying tolerances now:Test Weight 1 > [Tolerances Define] > Test Weight Tol. Setup

Test Weight 1 Tol. Setup

Set Tolerance T1 to half the tolerance stated in the SOP. This serves as an early warning system.

Define Name T1 as a warning limit accordingly. Define Tolerance T2 in accordance with the SOP. The name of this tolerance will also be taken from the

SOP.

2.

2.1

2.1.1

Test Sequence

Check 200 QC Setup

Version 2

Name Check 200 QC

Preparation Instructions Standard

Method SE1

Action if Failure Warning

Instructions If Failure Standard

Code to Unblock 123456

Entry in GWP History Yes

[ok]

Test Weight 1 Tol.

Check 200 QC Setup

Version 2

Tolerance T1 0.001 g

Name T1 Warn Limit

Tolerance T2 0.002 g

Name T2 Control Limit

[ok]

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Test Sequence

RP Check Setup

Version 2

Name RP Check

Preparation Instructions Standard

Method RPT1

Action if Failure Warning

Instructions If Failure Standard

Code to Unblock 123456

Entry in GWP History Yes

[ok]

Defining additional test sequence parameters

Now that the method has been defined, go back to the Test Sequence menu.Tolerances [ok] > Test Weight 2 [ok] > Test Sequence Setup

Test Sequence Setup

Under Action if Failure you must define the following menu items under Warning: - Warning Message: Advanced - Time Interval: 24 h - Max. Warning: 4

With this, the administrator makes it possible for the operator to postpone the test request for 24 hours (E.g. if the current time is not convenient). This can be done until the second day (in accordance with client specifications).

The number of times allowed for the test to be post- poned decreases until it reaches 1. At this point, the test must be done when the balance makes the call. If the user postpones again or the test fails, the balance will be blocked.

Under Instructions if Failure selecting Standard provides the user with helpful troubleshooting mea- sures in the event of an error. These measures corres- pond to the standard instructions usually detailed in an SOP.

Under Code to Unblock there is the option to assign a release code for the test sequence. (Note: It is advi- sable to lock the system menu for the operator).

For complete traceability of the measurement results, you must select Yes for the Entry in GWP History menu option.

Save your settings:Test Sequence [ok] > Test Sequences [ok] > Adjust/Test

In order to record the second test sequence for the second test weight, repeat the sequence in accordance with Item 2 Defining a test sequence, Item 2.1 Defining the method, Item 2.1.1 Defining Weight 1 and Item 2.1.2 Defining additional test sequence parameters, i.e., based on your second weight (Check 10 QC). Afterwards, exit the Test/Adjust Weight menu:Test Sequence 2 [ok] > Test Sequences [ok] > Adjust/Test

2.1.2

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Defining the task

After the test sequences have been set up, you must then define the tasks. To do this, change over to the Tasks submenu:Adjust/Test > [Tasks Define]

Automatic call-up

To perform the test sequence automatically on a quarterly basis, you must then define the tasks. To do this, open an unassigned task:Tasks > [Task 1 ] > [On Manual] > Task Setup

Task Setup

Assign the test sequence you have created to the task. Change the Starting Method to Interval:

- Set the interval start time to before the official start of work.- Select 90 days as Interval

With Defined Days, you can define any exceptions for the daily call-up. You may leave all days selected here.

With Defined Users you can define any exceptions for the users. You may leave all users selected here.

Save your settings by pressing [ok]. Repeat the sequence in accordance with Item 3.1 Automatic call-up in order to record the task for the second test sequence. Afterwards, exit the Test/Adjust Weight menu.

Save your settings:Task 02 [ok] > Tasks

Defining manual call-up

To ensure that the user can start up the test sequences manually by pressing the Test Sequence button, you will need additional two tasks. Open an unassigned task. For each test sequence, define a task as follows:Tasks > [Task 02 Define] > [On Manual] > Task Setup

With the exception of the Starting Method, the process is identical to the task described in 3.1. Define the Starting Method as Manual.

Save your settings and repeat the sequence in accordance with Item 3.2, in order to manually record the task of the second test sequence.

Save your settings and exit the system menu:Task 04 [ok] > Tasks [ok] > Adjust/Test [ok] > Exit

You are now back in weighing mode.

3.

3.1

3.2

Task 1 Setup

Test Sequence Check 200 QC

Starting Method Interval

Defined Days Define

Defined Users Define

[ok]

In this way, the test sequenceis started on a quarterly basis in

which a preparation dialog prompts the operator to check the balance.

Task 2 Setup

Test Sequence Check 200 QC

Starting Method Manual

Defined Days Define

Defined Users Define

[ok]

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To start the test sequence manually, you will require the Test Sequence function key. This is activated in the fol-lowing menu:Weighing Mode > Applications Setup > [Function Keys Define]

Activate the Test Sequence selection box which should appear in the first 5 items.Exit the menu:Function Keys [ok] > Applications Setup [ok] > Weighing Mode

Additional White Papers for GWPExcellence

www.mt.com/GWPExcellence

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Mettler-Toledo AG Laboratory & Weighing TechnologiesCH-8606 Greifensee, SchweizTel. +41 44 944 22 11Fax +41 44 944 30 60

Technische nderungen vorbehalten 09/2009 11793563 V1 Mettler-Toledo AGGlobal MarCom Switzerland