3: Operating Procedures
30
How to convert the measured current to flow rate
Assume the maximum flow rate is F
max
(gal/min) and the minimum flow rate F
min
is ‘0’ (gal/min), as shown.
To calculate the flow rate (gal/min) for a measured current I(mA) then:
3.4.2 Pulse output
Pulse output configuration
Two parameters can be configured from the
PULSE OUTPUT
menu:
•
Volume of fluid per pulse.
•
Pulse width.
1. With the instrument operating in the
FLOW
READING
mode, press the
Pulse
function key
to access the
PULSE OUTPUT
screen.
2. Ensure that the
Output
is
Off
.
3. Select
Vol per pulse
and press
ENTER
.
4. Enter the required value. (In the example
shown, a pulse is produced for every 10 gallons
of flow).
Note: The
Vol per pulse
can only be changed if the
Pulse Output
is
Off
.
5. Select a
Pulse width
(in ms) to suit the particular application – e.g. electro-mechanical counter. Refer to
the manufacturer’s data sheet for the minimum pulse width.
6. Select
Exit
and press
ENTER
to return to the
FLOW READING
screen.
0-20 mA
0-16 mA
4-20 mA
4
8
12
16
20
F
max
F
low
(ga
l/mi
n)
I
(mA)
F
min
[0-16 mA scale]
[0-20 mA scale]
[4-20 mA scale]
Flow rate
I
F
max
F
min
–
20
-------------------------------------------
F
min
+
=
Flow rate
I
F
max
F
min
–
16
-------------------------------------------
F
min
+
=
Flow rate
I
4
–
F
max
F
min
–
16
---------------------------------------------------------
F
min
+
=
PULSE OUTPUT
DD-MM-YY HH:MM:SS
Pulse output is ON
Flow units : gallons
Output : Off
Vol per pulse : 10.00
Pulse width (ms) : 10
Exit
www.
.com
1.800.561.8187