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FE: e.g. "7" (only for Flow Monitor)
•
Use the "Up" and "Down" buttons to set the
"number of error strokes permitted during
operation". If the number of error strokes is
exceeded, the "Flow error" error message
appears.
Selection of unit (display)
"Unit l/h" or "Unit gph" appears in the display.
•
Use the "Up" and "Down" buttons to switch
between:
– "Unit l/h": Unit Q = l/h, and
– "Unit gph": Unit Q = gal/h.
•
Press the "Start/Stop" button (confirm the setting
and close the service level), or
•
press the "Menu/Info" button for a minimum of
10 seconds (confirm the setting and open the
pump selection).
Pump selection
The actual pump type must always be
selected to ensure error-free operation
of the electronic control function.
Caution
Otherwise the displayed pump and
signals differ from the actual
conditions.
"-0.4", "-2.2", "-2.5", "-5.5", "-13.8" or "-20" appears
in the display.
•
Use the "Up" and "Down" buttons to switch
between the pump types DDI 0.4-10, DDI 2.2-16,
DDI 2.5-10, DDI 5.5-10, DDI 13.8 and DDI 20-3.
•
Select your pump type, which is indicated on the
pump nameplate.
•
Press the "Start/Stop" button and switch the
power supply off, then back on again (confirm the
setting and close the service level).
9.8 Resetting to default settings
You can reset the first and second function levels to
the default settings while the power supply is being
connected.
The service level settings (pump type,
unit of display for the dosing flow,
input and output settings) and the
Note
values for the total dosing capacity and
operating hours counter remain as they
are.
The pump is disconnected from the power supply.
1. Simultaneously press the "Up" and "Down"
buttons and hold them down.
2. Switch on the power supply.
– "boot" appears in the display.
3. Release the "Up" and "Down" buttons.
– All modified settings at the first and second
function levels are reset to the default settings.
50
9.9 Current signal control
0-20 mA / 4-20 mA
For controlling the dosing pump via an external
current signal of 0-20 mA (4-20 mA)
0-20m A
Run
Fig. 47
Display: 0-20 mA current signal control
2.50
4-20mA
Run
Fig. 48
Display: 4-20 mA current signal control
•
The flow rate is proportional to a current input
signal of 0-20 mA (4-20 mA).
•
Above 19.5 mA, the pump runs in continuous
operation at maximum dosing flow (Q
•
Below 0.2 (4.2) mA, the pump switches off.
Default setting for Q
flow up to 3 bar (default calibration
value). Once the pump has been
Note
calibrated, the current signals must be
weighted. See sections 9.9.2 With
calibrated pump and 9.9.3 Setting the
weighting.
The pump must be started first in this
Note
operating mode (LED lights up green
and "Run" appears in the display).
•
Use the "Start/Stop" button to start or stop the
pump.
4-20 mA current signal control
If the current input signal falls below 2 mA, the error
relay is switched, as an error has probably occurred
at the signal source or on the cable.
•
The error signal relay switches on. The LED
flashes red.
•
"4-20 mA" and "ERROR" flash in the display.
0.000
4-20mA
Run
ERROR
Fig. 49
Display: 4-20 mA current signal control
Analog
0
l/h
Analog
l/h
).
max.
is the dosing
max.
Analog
l/h
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