Suzuki GA413 Service Manual page 74

1B-20 AIR CONDITIONING
HOW TO READ THE STANDARD PERFORMANCE CURVE
1) Read psychrometer reading at the inlet, and get relative humidity from psychrometric chart. (See following fig-
ures.)
2) Measure dry bulb temperature at cool air outlet, then find out the difference between inlet and outlet tempera-
tures.
3) Check the relative humidity-to-temperature difference relationship using the graph.
As an example of 175C (62.55F) temperature difference and 60% relative humidity shown in it, if their crossing
point falls within the area between two lines, cooling performance then is satisfactory and proper.
HOW TO READ RELATIVE HUMIDITY (5C)
Measure wet-bulb temperature and dry-bulb temperature on the psychrometer at the evaporator air
inlet, follow lines at those temperatures and read the relative humidity curve at their intersection.
Example:
If dry-bulb temperature is 255C and wet-bulb temperature is 19.55C, the relative humidity is 60%.
(5C)
RELATIVE HUMIDITY (%)
HOW TO READ RELATIVE HUMIDITY (5F)
Measure wet-bulb temperature and dry-bulb temperature on the psychrometer at the evaporator air
inlet, follow lines at those temperatures and read the relative humidity curve at their intersection.
Example:
If dry-bulb temperature is 905F and wet-bulb temperature is 785F, the relative humidity is 60%.
(5F)
RELATIVE HUMIDITY (%)
DRY-BLUB TERMPERATURE (5C)
DRY-BLUB TERMPERATURE (5F)