Table 8.

Performance Index (PI) calculated as the percentage of time for which the combination of T and RH data fits into the specifications of each ASHRAE climate class in the case of one-minute sampling.

Class	PIMINUTE (%)—T and RH Combined
	Probe 1	Probe 2	Probe 3	Probe 4
AA	97	33	97	33
As	97	59	97	60
A	97	67	97	67
B	100	90	100	90
C	100	99	100	96
D	100	100	100	100