61
MATHS M WET BULB
SOURCE ANLG I/P
MATHS M
MATHS M DRY BULB
SOURCE ANLG I/P
MATHS M
BLOCK TO CONFIGURE
M
6
CONFIGURATION – ADVANCED LEVEL…
Input Source
Select the input source required for the wet bulb input. The source is selected
from analog inputs A1 to A6, B1 to B6 (depending on the options fitted – see
Section 4.2) or math functions M1 to M4.
Input Source
Select the input source required for the dry bulb input. The source is selected from
analog inputs A1 to A6, B1 to B6 (depending on the options fitted – see Section
4.2) or math functions M1 to M4.
Return to
Block to Configure
frame.
6.2.3
Relative Humidity (RH)
The relative humidity calculation requires two inputs, one from a wet bulb sensor and one from a dry bulb sensor. Both of these inputs
are configured as variables. RH tables are based on the use of an aspirated pyrochrometer having an air velocity of at least 11.5 feet
per second or 3.5 meters per second across the bulb sensors.
Inputs used for wet and dry bulb measurement must be in the ranges 0 to 100
C or 32 to 212
F. The result must be set to 0 to 100.0%
RH.