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{2
nd
FUNCT} 4 mA
The 4-20mA output on standard FD6000 Series flow meters
is scaled at zero flow equals 4mA and 20 FPS (6.08 MPS)
equals 20mA. The 4mA key allows fine adjustments to be
made to the “zero” of the 4-20mA output or allows offset to
be placed on the 4-20mA output. To adjust the 4mA
output, an ammeter or reliable reference connection to the
4-20mA output must be present.
Procedure:
1. Either break the present current loop and connect the
ammeter in series (disconnect either wire at the
terminal block labeled 4-20mA on the Main PCB of the
FD6000) or, if this output is not being utilized, connect
the ammeter + to the + terminal and – to the – terminal
of the 4-20mA output.
2. Press the 4mA key.
3. With no flow moving through the pipe, adjust the
setting count using the arrow keys until 4.00mA is
indicated on the ammeter. The typical count value
range for this setting is between 3350 and 3850.
4. Press ENTER to store the value.
5. Re connect the 4-20mA output circuitry as required.
{2
nd
FUNCT} VEL ADC
Press VEL ADC to display the raw analog to digital
converter counts that are being processed by the
microprocessor. This count value will vary linearly with
flow rate from 0000 at zero flow rate to 1024 at maximum
full-scale flow rate. No modifications of this count can be
made, this display is for diagnostic purposes only.
{2
nd
FUNCT} BLANKING
This key is unused.
PART 3 - KEYPAD CONFIGURATION