Calculated Industries 4090 - Manual (Page 47)

46 — ITI S
HEET
M
ETAL
/HVAC P
RO
VELOCITY PRESSURE / VELOCITY EXAMPLES
The Velocity Pressure/Velocity function uses an entered value to
calculate these four values:
1. Velocity (FPM) Number entered is assumed to be
Velocity Pressure
2. Velocity (Pressure) Number entered is assumed to be
Velocity (FPM)
3. Metric Velocity (MPS) Number entered is assumed to be
Metric Velocity Pressure (kPA)
4. Metric Velocity Pressure Number entered is assumed to be
(kPA)
Metric Velocity (MPS)
The first time you perform this function, the values are displayed in
the order identified above. Subsequent calculations begin with the
last displayed value.
Converting Velocity Pressure to FPM
After obtaining Velocity Pressures (VP) from taking a traverse, your
calculator easily converts to Feet per Minute (FPM).
For example, convert the following VPs to FPM:
0.049”
0.123”
0.027”
KEYSTROKE DISPLAY
1. Enter first VP and convert to FPM:
o o 0.
• 0 4 9 Ç 0* FPM 886.5445
2. Enter second VP and convert to FPM:
• 1 2 3 Ç 0 FPM 1404.608
3. Enter third VP and convert to FPM:
• 0 2 7 Ç 0 FPM 658.0887
*The VP ß © FPM function begins with the last displayed value. If FPM is not displayed
with the first press of Ç 0, continue pressing 0 until FPM is displayed.