Amprobe THWD-10 THWD-10W RH-Meters - Manual (Page 13)

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the current readings:
MAX: The highest measurement recorded.
MIN: The lowest measurement recorded.
MAX-MIN: The difference of the highest and the
lowest measurement.
AVG: The average values of the measurements.
Press “MIN/MAX” key over two seconds to exit the
function. In this mode, press “HOLD” key to stop
recording, all values are frozen, press “HOLD” key again
to restart recording. In this mode, the APO function and
other keys are disabled, excluding “HOLD” and Back-
light keys. Press and hold down the “MAX/MIN” key for
more than 2 seconds to exit the MAX/MIN function.
“HOLD” Button
Press the “HOLD” key to enter the data hold mode, the
“HOLD” annunciator is displayed at the center-left of
display. When data hold mode is selected, the meter held
the present readings and stops all further measurements.
Press the “HOLD” key again to cancel data hold mode,
causing meter to resume taking measurements.
“WB/DP” Button
In the NTC data Mode, the Meter displays ambient
temperature when first turned on. To display wet
bulb(WB) temperature, press “WB/DP” key once.
Press the “WB/DP” again to switch to dew point(DP)
temperature. Press “WB/DP” a third time returns the
Meter to ambient temperature.
“K/NTC/K-DP” Button
Press the “K/NTC/K-DP” key, the meter can cycle through
“K-TYPE”, “NTC”, “KDP”.
*K-DP = K-TYPE temperature minutes Dew point
temperature.