Example Procedure For Turning Off Math Mode - HP 53131A Operating Manual

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Chapter 2 Operating Your Universal Counter
Using the MATH Menu Keys
Press Scale & Offset key until OFFS: is displayed.
OFFS: 0.000000 seconds should be displayed. This is the default value.
Set the Offset to .1000000 s.
Refer to the sub-section titled "Entering the Offset Value" in Chapter 1,
"Getting Started," for details on how to perform numeric entry for Offset.
a. Use the appropriate combination of the arrow keys to display a value
of .1000000 s.
b. Press +/ key, which is located below the arrow keys, to change the
plus sign to minus.
OFFS: .1000000 s is displayed.
c. Press Enter key.
BE SURE to press the Enter key to complete numeric entry.
The counter will add .1000000 s to each measurement.
Press Run key.
The resultant period measurement is displayed with 100 nanoseconds
subtracted from each result.

Example Procedure for Turning Off Math Mode

Press Scale & Offset key until MATH: ON is displayed.
Press any one of the arrow keys.
MATH: OFF is displayed. Now, Scale and Offset no longer are used to
modify the displayed result.
Press Run key to return the Counter to its normal operation.
2-30 Operating Guide