UEi Test Instruments DT304 - Manual (Page 6)

Buttons
NOTE: Press all the dual function buttons momentarily to activate the
Upper Row Function ,and press these buttons for more than 1 second
to activate the Lower Row Functions.
Press this button momentarily to turn the backlight on and
off. The backlight turns off after 30 seconds without any
button pressed. If the battery is low, the backlight is
disabled.
Press this button for more than 1 second to turn the
thermometer on and off.
While displaying T1/T2 in the primary display momentarily
pressing this button will alternate between T1/T2 and
T3/T4. Press and hold to scroll the secondary display to
temperature differential . The internal temperature of the
meter in the lower display
Press this button momentarily to step through the
maximum, minimum, and average readings in the
secondary display. When viewing logged readings, shows
the maximum, minimum, and average of the logged
readings. Press this button for more than 1 second to turn
off this display.
The “ “ function is activated in the “RECALL” and
“SETUP” mode only.
Press this button momentarily to freeze or release the
displayed readings. Press this button for more than 1
second to switch between Celsius (˚C), Fahrenheit (˚F), and
Kelvin (K).
The “ “ function is activated in the “RECALL” and
“SETUP” mode only.
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