62 Agilent U1251A/U1252A User’s and Service Guide
3 Features and Functions
Figure 19 Refresh hold mode operation
The HOLD sign flashes 
until the measured 
value is stable and 
updated
Press
• For voltage and current measurements, the holding value will not be 
updated if the reading is below 500 counts. 
• For resistance and diode measurements, the holding value will not be 
updated if the reading is in “OL” (open state). 
• The holding value may not be updated when the reading does not reach 
a stable state for all measurements.