Refresh Hold (Auto Trigger) - Keysight U1401B User's And Service Manual

3 Making Measurements

Refresh hold (auto trigger)

The refresh hold mode freezes the displayed value until the reading variation
exceeds the specified number of counts.
This function will autotrigger and update the held value with a new measured
value. When a new value is updated, the instrument will beep once as a
notification. The keypad operation is similar to the operation of data hold mode.
1 Make sure the refresh hold mode is enabled in the setup mode.
2 Press
3 Press
For voltage and current measurements, the held value will not be updated if the
variation of the reading is below 500 counts. For resistance and diode
measurements, the held value will not be updated if the reading is OL or open. For
all measurements, the held value will not be updated if the reading cannot reach a
stable state.
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to enter the refresh hold mode.
– The present value will be held and the DH annunciator will appear on the
display.
– It will be ready to hold the new measured value once the variation of the
instantaneous reading exceeds the preset variation count (defined in setup
mode); while it waits for a stable new reading, the DH annunciator will
flash.
– The DH annunciator will stop flashing once a stable new reading is
available, and then the new value will be updated to the display. The
instrument will beep once as a notification.
to exit this mode.
Keysight U1401B User's and Service Guide