Store Calibration Factor to UUT

This test enables you to store the calibration factors generated in the Calibration Factor test to the power sensor (UUT). This test also allows you to save the calibration factors in the UUT to a backup file. You can restore the calibration factor in the backup file to the UUT via the Calibration Factor Read and Write utility. When the UUT is used to perform power measurement, the calibration factor and the other correction data stored in the UUT will be applied to the measurement results.

Required Test Equipment

None required.

Test Setup

For all UUT, except U2000B and U2001B:

For UUT U2000B and U2001B:

The UUT uses a fixed point representation of the calibration frequency due to the limited storage capacity available in the UUT EEPROM. For certain frequency values this will be exhibited as an apparent discrepancy between the reported calibration frequency and the actual calibration frequency. Any discrepancy in the applied calibration factor due to this is minor and can be treated as insignificant.  In any application where this must be accounted for, error assessment should be performed using the equation below. The calibration factor for a frequency point in between the calibration frequencies is linearly interpolated by the UUT firmware:

, where y is the calibration factor and x is the frequency associated with the calibration factor.

Figure 1. Display for existing and new calibration factors

Backup existing calibration factors to a file

  1. Click Backup Existing Calibration Factor to File.

  2. This file will be saved to the following directory by default:

    C:\Documents and Settings\All Users\Application Data\Agilent Technologies\Test Management Environment\PowerSensors\{Model#}_{Serial#}

    However, you may choose to customize the file name and location to store.

  3. The calibration factors will be stored to the desired file and location.

Store the New Calibration Factors to the UUT EEPROM

  1. Click Write New Calibration Factor to EEPROM.

  2. The calibration factors will be written to the EEPROM of the UUT.

    • Using the UUT firmware version A1.03.01 and above, the calibration date can be updated in the EEPROM of the UUT.

    • The place of calibration, which is entered through the Cal Facility textbox, is optional. It is limited to 7 characters, and will be written to the EEPROM of the UUT. If the Cal Facility textbox is left unfilled, the place of calibration will be stored as NoEntry in the EEPROM of the UUT.

  3. The storing of the calibration factors is completed. You may choose to run the Calibration Factor Read and Write utility to view the calibration factors stored in the EEPROM of the UUT.