CARLO GAVAZZI UDM 35 - PROGRAMMING Programming Manual page 19

CONVERTING CELSIUS TO FAHRENHEIT
The UDM35/40 digital panel meters use the Celsius temperature scale.
However, the displayed value can easily be scaled to indicate Fahrenheit values
by using the following guidelines:
The LoE and HiE are always expressed as Celsius values.
To display Fahrenheit values, manually convert the LoD to a Fahrenheit value
and then convert the HiD to a Fahrenheit value.
Ex:
LoE is 0
HiE is 100
Manual conversion to Fahrenheit:
LoD would be 32 (F)
HiD would be 212 (F)