48  U1241B/U1242B User’s and Service Guide
5 Performance Tests and Calibration
error code E03. Ensure that the last 4 digit serial number is entered 
correctly and repeat the step 1 to 7.
Using the Front Panel for Adjustments
This section describes the process used to perform adjustments from the 
front panel. 
Selecting the Adjustment Mode
Unsecure the multimeter, see Unsecuring the Multimeter for Calibration or 
Unsecuring the Multimeter Without the Security Code. Once the 
multimeter has been unsecured, the reference value will be indicated on 
the primary display.
Entering Adjustment Values
1 Press   and   to step through each character in the primary 
display. 
2 Press   and   to change the value of the corresponding 
character from digits 0 through 9. 
3 Apply the respective corresponding input signal from the recommended 
test equipment in Table 5- 1.
4 Press   (Save) when done to start calibration.
Ensure that the accuracy of the input signal adheres to the Valid Adjustment Input Values 
in Ta b l e 5 - 3 .