Teledyne 4020 Operating & Maintenance Manual page 72

Operation
Press <Enter> again to move to the Auto/MAN field.
<Enter>
<▲▼> Use the <▲▼> keys to toggle between Auto and
Manual.
Press <Enter> when Man is displayed on screen.
<Enter>
The next screen prompts you to select a range: R1, R2 or
R3.
<Enter> Press <Enter> to highlight the Range field.
<▲▼> Use the UP/DOWN keys to choose R1, R2 or R3.
<Enter> Press <Enter> to accept the displayed range. The arrow
will move to the line for defining that particular range. If
you don't need to adjust the range setting, <Escape> back
to the Analyze Mode and note that it is using the fixed
range you entered.
If you need to alter the range setting:
<Enter> Use the <Enter> key to move to the value you want to
change to define the range you want to work with.
<▲▼> Use the UP/DOWN keys to cycle the numbers up or
down for each digit.
<Enter> Use the <enter> key to move to the next character
placeholder in the number field.
<Enter> When the last digit has been entered, press <Enter> again
to accept the value or <Escape> to abort the numerical
entry.
This same procedure is used to select and define all ranges.
Teledyne Analytical Instruments
Model 4020
54