Delta OHM HD37AB1347, Руководство пользователя

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3) FVm (Flow Rate)
This item indicates the average value of the flow rate. To change this value, use the arrows ▲▼ to
select the 3) FVm menu item.
AIR FLOW
Samples: 010
Number of air flow rate samples captured
FVm 0.50 L/s
Average air flow rate value as arithmetical average of the samples
Va 0.01 m/s
Current wind speed
FVa 0.50 L/s
Current flow rate
1) Samples capture
Capture the air flow samples
2) Samples reset
Reset the acquired samples
Description:
samples
indicates the number of acquired samples.
FVm is the average of the air flow rate acquired samples.
n
FVa
FVm
n
i
i
∑
= =
1
Va
is the current air speed value
FVa is the current air flow rate value
To acquire the FVm samples select with the arrows ▼▲ the Samples capture menu item. Every
time the ENTER key is pressed, a sample is acquired. The number of samples and the FVm value
are increased on display.
To reset the FVm value and the number of samples, select with the arrows
▼▲ the Samples reset
menu item and confirm with ENTER.
Example:
The number of acquired samples is 10.
The acquired flow rate values are:
sample n. 01: FVa = 0.2 L/s
sample n. 02: FVa = 0.5 L/s
sample n. 03: FVa = 0.3 L/s
sample n. 04: FVa = 0.1 L/s
sample n. 05: FVa = 0.6 L/s
sample n. 06: FVa = 0.5 L/s
sample n. 07: FVa = 0.4 L/s
sample n. 08: FVa = 0.5 L/s
sample n. 09: FVa = 0.2 L/s
sample n. 10: FVa = 0.2 L/s
s L FVm / 35 . 0
10
5 . 3
10
2 . 0 2 . 0 5 . 0 4 . 0 5 . 0 6 . 0 1 . 0 3 . 0 5 . 0 2 . 0
⋅ = =
+ + + + + + + + +
=