View2111 : Calibration page

See Also : How To : Connect a WE2111, Settings page,
 

The Calibration page provides the ability to calibrate an indicator remotely.  There are 3 methods of calibration:

  1. Normal Calibration with testloads
  2. Calibration file download
  3. Direct mV/V calibration
It is also possible to store a calibration on the PC and to restore it to an instrument at a later time.

There are x steps to normal remote calibration:

  1. Preparation
  2. Zero Calibration
  3. Span Calibration
  4. Linearisation
  5. Saving Calibration
Preparation

There are several steps required to prepare the indicator for calibration:

  1. Connect to the indicator: See How To : Connect a WE2111 for a description of this.
  2. Read the settings: Before performing any calibration, it is necessary to read all of the settings from the indicator and make sure that the instrument is configured correctly. To read the settings, select the " Read Settings" option from the toolbar.  The address, serial number and software version is displayed on the status bar at the bottom of the window.
  3. Check/Update the Settings: Goto the "Settings" page which should now be available.  Check the settings and make any changes.  Pay particular attention to the "build" and "option" groups.  See Settings page.
  4. Send the settings to the indicator:  Click on the " Write Settings" button on the toolbar to send the updated settings to the instrument.  Note : When the changes have not been sent to the indicator, the indicator details are shown with a red background on the status bar at the bottom of the window.


ZERO Calibration

After preparing the indicator, goto the "Calibration" page.  Make sure that all weight is removed from the scale base.  Press the "Zero" button to initiate a full zero calibration of the indicator.  While the zero calibration is in progress the display will show "------".

SPAN Calibration

After the zero calibration is completed, the span calibration can be done:

  1. Enter the calibration weight
  2. Press the Span button to initiate a full span calibration of the indicator. While the span calibration is in progress the display will show "------".
LINEARISATION

In order to remove any non-linearities in the scale base hardware it is possible to enter up to 5 linearity correction points.  To add a point:

  1. Place test weights on the scale as close as possible to the area of maximum error.
  2. Select a linearistion point by clicking on the points 1: to 5:.
  3. Enter the correct calibration weight of the test mass.
  4. Press the Set button to make the correction.
  5. The amount of the correction and the position of the point as a percentage of fullscale is displayed in the list of points.
To remove a point click on the item in the list to select it and click on the Clear button.

SAVING Calibration

To save the calibration select " Write Settings" from the toolbar.
 

Backup and Restore Calibration

The calibration of a WE2111 can be copied to the PC and stored in a file.  This file can be sent to the same or different WE2111 at a later time.  Multiple WE2111s can be sent the same calibration data.  To backup calibration information on the PC:

  1. Connect to the indicator: See How To : Connect a WE2111 for a description of this.
  2. Read the settings: Before performing any calibration, it is necessary to read all of the settings from the indicator.  To read the settings, select the " Read Settings" option from the toolbar.
  3. Ensure that the WE2111 setup is current and select " Write Settings" from the toolbar.
  4. Click "Backup calibration" and select a filename and path when prompted.
To restore calibration information to a WE2111:
  1. Connect to the indicator: See How To : Connect a WE2111 for a description of this.
  2. Read the settings: Before performing any calibration, it is necessary to read all of the settings from the indicator.  To read the settings, select the " Read Settings" option from the toolbar.
  3. Goto the "Calibration" page and find the "Backup and Restore Calibration" controls.
  4. Click "Restore calibration" and select a filename when prompted.
  5. Select " Read Settings" from the toolbar to ensure that the Viewer has correct information.
Note: Using "Restore calibration" will overwrite the current calibration.
 

Direct mV/V Calibration

There are 3 steps to performing a direct mV/V calibration:

  1. Connect to the indicator: See How To : Connect a WE2111 for a description of this.
  2. Read the settings: Before performing any calibration, it is necessary to read all of the settings from the indicator and make sure that the instrument is configured correctly. To read the settings, select the " Read Settings" option from the toolbar.
  3. Check/Update the Settings.
  4. Goto the "Calibration" page and find the "Direct mV/V Calibration" controls.
  5. Enter the mV/V value for zero.
  6. Enter the mV/V value for the fullscale span.
  7. Press the Calibrate "button".
Note: Using this option will overwrite the current calibration.
 
 

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