Pump Controls; Level Control - Etatron PB Serie Manual Del Usuario

PB-VFT
8.2.3 - PB-VFT PUMP CONTROLS (Fig. 20)
1 - ON/OFF light switch "green"
2 - Level L.E.D. "yellow"
3 - Pulse L.E.D. "red"
4 - Function L.E.D.
5 - Pulse selector
6 - Functions selector
For flow rates and technical data see table and dia-
grams.
Fig. 20
The PB-VFT dosing pump offers the opportunity to choose four different operating modes.
MODE 1 / Manual: The pump dispenses at a set frequency, which can be selected by the operator. The figure given
on the selector 5 indicates the number of injections the pump supplies in a minute. Maximum 100 injections per minute
are possible. Beyond this limit the pump cuts OFF.
MODE 2 / proportional to external pulse, multiplier with memory: (1 x n M): The pump waits for an external pulse
(i.e. RED contact) from a pulse emitting device (e.g. w. meter) and supplies the number of injections indicated, on the
selector. In the case where one or more pulses are received during the dispensing phase, these are recorded and the
pump effects the number of injections obtained by multiplying the contacts received always with the figure set on the
selector.
Example:
- Pump with dial set on function "1 x n (M)"
- Selector set to "23".
- The moment the w. meter emits a pulse, the pump will effect 23 injections. If the contact closes again during this phase,
e.g. 5 times, the microprocessor multiplies the two data and the pump supplies 115 injections (23 x 5).
- On completion of the 115 injections, the pump waits for the next external pulse to restart the dispensing cycle.
MODE 3 / proportional to external pulse, multiplier (1 x n): The pump waits for a pulse ( i. e. reed contact) from an
external device and supplies the number of injections indicated on the selector. If additional pulses are received dur-
ing the dispenser phase, they are ignored.
Example:
- Pump with dial set on function "1 x n".
- Selector set to "23".
- The moment the w.meter or other device emits a pulse, the pump starts dispensing 23 injections. If the contact is
closed again during this phase, these are ignored .
- On completion of the 23 injections, the pump waits for the next pulse to restart the dispensing cycle.
MODE 4 / proportional to external pulse, divider (1 : n): The pump effects an injection only when it has received the
number of pulses (i.e. contact) set on the selector.
Example:
- Pump set with dial on the function "1 / n"
- Selector set to "23".
- The moment the w. meter or other device has emitted 23 pulses, the pump gives an injection.

8.2.4 - LEVEL CONTROL

The dosing pump is supplied with level control setting and upon request floating level switch. When the level
of the additive is lower than the switch, level alarm and yellow L.E.D. are ON: the pump is OFF.
The level control alarm goes ON with 5 seconds delay.
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