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Button
Function
ON, OFF, Hold
Humidity, dew point,
mixing ratio/absolute
humidity, air temp.
Surface temperature,
surface - dew point
temperature difference,
time and date, probe
serial number
Stores measurement in
the instrument memory
GE Protimeter Hygromaster
Table 3: Spot Measurements
Display Symbols
II (pause)
%rh TD
°C or °F
ppmw/gpp
TA
Ts
Δ- T
Log
Explanation
Switch ON - quick press
Switch OFF- press and hold for 3 sec
Hold value - quick press and release,
pause symbol flashes.
Primary display scroll.
To change units
see Instrument Set
Up
(Table 7).
Secondary display scroll.
Time is shown on upper display as
HH:MM. Date is shown on lower
display as MM:DD. Probe serial
number is scrolled across.
Press and hold for 3 seconds to store
all measurements. Momentarily
displays the log record number and
stored data.
Page 8
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