Calculated Industries 4090 - Circle;Arc Keys

POCKET REFERENCE GUIDE — 8
Ç d Fan Law 3 — Calculates
the missing variable (e.g.,
“a-new” or “b-new”, for
CFM new or BHP new) for
Fan Law 3
STORAGE REGISTERS USED FOR FAN LAWS:
Ç 4 Enters “a-old” or current
“a” value
Ç 7 Enters “a-new”
Ç 5 Enters “b-old” or current
“b” value
Ç 8 Enters “b-new”
Velocity Pressure/FPM Keys
Ç 0 VP
§ ©
FPM
Press
Result
1 Calculates velocity
(FPM)
– assumes
entry is velocity
pressure
2
Calculates velocity
pressure
–
assumes entry is
velocity (FPM)
(Cont’d)