Operation
19
HPC50 Series Operation Manual
X
Percent Flow Function
The HPC50 can calculate the flow percentage for a differential pressure transmitter. The square root of the differential pressure across an orifice plate is pro-
portional to the flow. The differential pressure is simulated or measured via the mA current and the resultant calculations are then scaled from 0 to 100%.
1
Select
% Flow
from the mA units selection in the upper window.
2
Use the
(
arrow
)
buttons to set the 0 and 100% points for both the mA and pressure ranges of the transmitter.
3
Increase pressure to the desired point and the HPC50 upper display will indicate the % error as well as the actual mA value. The lower display will show the
measured pressure.
4-20 Flow
0-20 Flow
0%
4
0
25%
5
1.25
50%
8
5
75%
13
11.25
100%
20
20
X
Scaling Function
The HPC50 has the ability to read current or voltage in the upper display that is scaled to and displayed in the same units as the lower display. This makes it
much easier to compare a mA reading to a known accurate pressure reading.
1
Select
Scaling
from the mA units selection in the upper window.
2
Use the
(
arrow
)
buttons to set the 0 and 100% points for both the mA (or VDC) and pressure ranges of the transmitter.
3
Increase pressure to the desired point and the HPC50 upper display will indicate the equivalent pressure based on the mA reading, as well as the actual mA
value. The lower display will show the measured pressure.
