TPI 597, Manual

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4. Keypad Functions
Turns the instrument ON and OFF.
Freezes the displayed reading. When hold is active “DH” is dis-
played.
Switches the displayed temperature reading between Celsius and
Fahrenheit.
Toggles the record feature ON and OFF. When record is active
“REC” is displayed.
Toggles the displayed temperature reading between ambient (Ta),
dew point (Td), and wet bulb (Tw).
When record is active, recall (RCL) is used to toggle between
maximum recorded values (MAX), minimum recorded values
(MIN), average recorded values (AVG), and turn on RS232 com-
munication (RS-232).
HOLD
°C
°F
REC
MODE
RCL