Watson-Marlow 520DuN IP66/NEMA 4X User Manual
40
Scaling - stroke
Select
Scaling - stroke
using the
UP
or
DOWN
keys and press
ENTER
to
confirm your choice.
The pump offers five further choices:
Off, Keypad, 4-20mA, 0-10V
and
Program
. Use the
UP
or
DOWN
keys to make a selection and press
ENTER
to
confirm your decision.
If
Off
is selected, scaling control is disabled and the pump displays the
Analogue setup menu.
The other options allow a choice of inputs to control scaling.
If
Keypad
is selected, scaling will be controlled by keypad entry of the scal-
ing factor while the pump is running in Auto analogue mode.
If
4-20mA
or
0-10V
is selected, the pump configures the the hardware and
calibration data appropriately. A confirmation screen is displayed briefly and
the user is returned to the Analogue setup screen.
If
Program
is selected, the pump offers two choices:
mA
and
V
. Use the
UP
or
DOWN
keys to make a selection and press
ENTER
to confirm your
decision.
The pump displays a screen inviting the user to enter the required speed
proportion for low signal input as a value from 0.0 to 1.0. Enter your value
using the
UP
or
DOWN
keys and confirm by pressing
ENTER
.
A similar screen allows the user to enter the required speed proportion for
high signal input as a value from 0.0 to 1.0. Enter the value in the same way.
If
STOP
is pressed at any point in the program setup (before pressing
ENTER
on the high signal speed proportion screen), the pump will display
the previous screen.
When high and low values have been entered and confirmed, the pump
configures the hardware and basic calibration data. A confirmation screen is
displayed briefly, followed by a warning that the analogue signal has not
been trimmed. The user is returned to the Analogue setup screen.
See 22.4
Scaling: analogue input 2
in Automatic control wiring.
Trim
Trim
displays the Trim menu, described above. See 18.1
Trim
.
It is recommended that a trim calibration is always performed to align the pump’s
response to the actual process analogue signal.
Exit
Exit
returns the user to the first section of the Setup menu, described above. See
18
Setup
.
