Amprobe ACD-330T Clamp-On-Multimeter - Manual (Page 18)

DATA HOLD
The data HOLD function allows operator to freeze the displayed digital value while the
analog bargraph displays present readings. Press "DW HOLD button to enter the data
HOLD mode, and the "DWannunciator is displayed.
Press the button again to exit. The present reading is now shown.
ZERO (RELATIVE)
The ZERO (relative) function subtracts a stored value from the present measurement and
displays the result.
1 ) Press the ZERO button momentarily to set the relative mode. This sets the display to
zero and stores the present reading as a reference value. The " m " annunciator will also
be displayed. Press this button again to exit the relative mode.
2) The ZERO (relative) mode can be set in both the autorange or manual range mode.
The'relative mode can't be set when an overload has occurred.
Figure 8. Data Hold Operation
Figure 9. Relative (Zero) Operation.
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