Omega Engineering HH147 User Manual page 10

Operation
5. REL: The Minus Relative Readout Function Key.
Press the "REL" key, a "REL" icon will
display on the LCD and the original temp.
will go to 0 and save the original temp.
to make a standard value.
Whenever the input temp. shifts, the LCD
will show the minus value of the original
temp. value and input temp. value.
6.1°: 1° or 0.1° Unit Selection Function Key
Press the "1" key, the whole resolution will
become 1°C.1°F, and eliminate the dot. Press
the key again and the display will be restored
to the common state (the resolution will
become 0.1°C/0.1°F).
Note: The resolution of the thermocouple types
is shown on page 4.
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