Elcometer 319 S User Manual page 7

4 GETTING STARTED (continued)
Twb; Wet Bulb Temperature - calculated from Ta and RH

SH; Specific Humidity - calculated from Ta and RH

Note: The formula used for calculation of Twb and SH uses a fixed value of air
pressure set at 1.0 atmosphere (1013mbar). The accuracy of Twb and
SH will vary at other values of atmospheric pressure. This variation may
be greater than ±1°C for Twb and ±1% / 10 mbar for SH.
To setup the display:
1 Press Menu/Setup/Display/Select
Readings.
 
2 Use the
required option and press 'Sel'.
Pressing 'Sel' again will de-select the
option.
The gauge will beep if the user attempts to

select a parameter when five are already
selected in which case, a parameter must
be de-selected before another is chosen.
3 To select which parameter is shown in
the largest digits at the bottom of the
display, press
Menu/Setup/Display/Main Reading.
 
4 Use the
required option from the list displayed
and press 'Sel'.
Only those climatic parameters selected via Step 2 above will be available

for selection in the 'Main Reading' list.
To increase the size of the main reading, reduce the number of

parameters displayed on the reading screen.
Note: If a reading exceeds any set limits during measurement, it will be shown
flashing on the display, even if it has not been selected for display via
Steps 1-2 above.
4.5 SELECTING THE MEASUREMENT UNITS
A choice of measurement units is available ; °C, °F, g/kg, gr/lb. To
select the measurement units, press Menu/Setup/Units.
a
g/kg and gr/lb relate to 'Specific Humidity' measurements only.
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a
R
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