Operation; Button Descriptions; Displaying Temperature - Extech Instruments HD780 User Manual

Operation
Button Descriptions
MAX/MIN
P M
H
T M
/SET
/UNITS
°F/°C 
Display Backlight
To turn the display backlight ON, momentarily press the backlight
backlight off press the backlight
Data Hold
To freeze a displayed reading on the LCD, press the HOLD button one time (the HOLD icon will
appear on the bottom left portion of the LCD). To exit HOLD, press the HOLD button again.
Units of Measure
The currently selected unit of measure is shown below the measurement value on the top
sections of the meter's LCD. To change the unit of measure, press the /UNITS button until the
desired unit of measure appears.
Displaying Pressure
Press Unit button to scroll through available pressure units of measure. Press P M button to
toggle between P1, P2, P1‐P2 readings.
Displaying Temperature
Press unit button to select C/F. Press T M button to toggle between T1, T2, T1‐T2 readings. The
display shows dashes (‐ ‐ ‐) when there is no thermocouple connected. The display shows "OL"
when the temperature being measured is outside the thermocouple range.
Power ON/OFF the meter
Select MAX/MIN/AVG
Toggle between P1 and P2
Freeze the readings on the display
T oggle between T1 and T2 (The middle display shows the temperature plus the
offset. See the SETUP section to adjust the offset values for T1 and T2)
Press once to power ON/OFF backlight or press for 3 seconds to enter/exit
setup mode
Change the pressure units, scroll though setup options, or increase the
displayed setting
C hange the temperature units, scroll through setup options, or decrease the
displayed setting
P ress one time to enter setup option. Press two times to store the displayed
setting into memory
button one more time.
5
button. To turn the
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