Proportional Pump Regulated By A Current Signal Pb-Cc; Accessories; Typical Installation; Level Control - Etatron PB Serie Manual Del Usuario

9.0 - PROPORTIONAL PUMP REGULATED BY A CURRENT SIGNAL
The PB-CC dosing pump is a microprocessor unit suitable for operation in proportion to a "mA" input signal.
Connected to a transmitter / indicator instrument or other device which supplies a modulated current signal from
0 to 20 mA, the pump pulse frequency will be proportional to the mA signal received: higher the signal higher
the pump flow.
The pump can be adapted for inverse operation: the higher signal corresponds to the lowest flow. Same model
can be adapted for a different mA signal (0 - 20 mA; 4 - 20 mA; 20 - 4 mA; ecc.).
Various functioning modes are available according to the system requirements. The following modes can be
selected:
• Mode "Manual" pulse frequency manual adjustment (imp/min), used to prime the pump head.
• Mode "Set 1" the mA value corresponds to the imp/min frequency setting having the minimum output.
• Mode "Set 2" the mA value corresponds to the imp/min frequency setting having the maximum output.
PLEASE NOTE: The pump input impedance value is 255 ohm.

9.1 - ACCESSORIES

• 1 flexible PVC suction hose, transparent crystal type, length 2 m;
• 1 semirigid polyethylene hose, white, length 2 m;
• 1 injection valve 3/8 BSP m;
• 1 filter;
• 1 instructions/operating booklet.
9.2 - TYPICAL INSTALLATION (Fig. 22)
A Injection valve
B Power supply
C Filter
D Floating level switch
F Water meter connector
G Level switch connector
H Cable gland
K Pulse emitting water meter
I Chemical tank
S Process tank

9.3 - 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 goes ON, the display will show "FAO", the pump is off giv-
ing an optical sound alarm.
The level control alarm goes ON with 5 seconds delay.
PB-CC
• 45 •
Fig. 21
Fig. 22
PB-CC
I