Teledyne ADFM Analog Output Module, Technical Manual, Page: 113 / 156

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