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C-2.5
Discharge Commands
The ADFM uses the following commands to calculate the discharge.
QB - Bed Level
Purpose:
Format:
Range:
Default:
Description:
QC - Channel Type
Purpose:
Format:
Range:
Default:
Description:
QD - Algorithm Select
Purpose:
Format:
Range:
Default:
Description:
Switch
a = Qmain
b = not used
c = not used
d = not used
e = IHRW
f = QmodVA
g = QManning
h = Qva
i = not used
ADFM Technical Manual (January 2000)
Sets the bed level in the pipe or channel.
QBnnnn
0 to 2000 mm
QB0000
Use this command if the bottom of the pipe or channel has
filled in with silt. Water flow under the transducer is not pos-
sible and is not calculated for the total discharge.
Sets the pipe or channel type between rectangular or circular.
QCnnn
nnn = 0, 1 (0 = rectangle, 1 = circle)
QC000
Use this command to set the pipe or channel type between rec-
tangular or circular.
This command turns on or off various methods used to calcu-
late the flow rate.
QDabc def ghi
Firmware switches (see description)
QD100 011 110
See table below for descriptions.
Description
Do other selected algorithms (order of priority e, f, h, and g) and output a single best answer.
Data adaptive fit
Average Velocity x Average Area with R
(not implemented)
Average Velocity x Average Area
ADFM Commands
1/7
power law applied to velocity near the boundry.
page C-33
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