HC150 / HC101
PROGRAMMING THE PUMPS
Solenoid driven dosing pump
ENGLISH
ADSP9500090
Rev.2.5 09.09.2015
29
3.2 HC150 / HC101 mA
The pump can operate in constant mode or in proportional current mode (mA).
In constant mode it operates like model HC150 costant, whereas in proportional mode mA, the number of impulses
is proportional to the current signal connected to the BNC - red connector.
Using the regulating knob it is possible to set the maximum flow of the pump associated to the maximum input
current value, i.e. 20 mA.
After which the pump will dose proportionally between 4 and 20 mA, as shown in the graph provided below:
In proportional current mode it is also possible to use one of the two pump operating scales, as in the constant
version.
The HC150 mA pumps can be piloted, for proportional dosing, from any regulating instrument that is capable of
providing a current signal between 4-20mA (ex.: pH-metres, redox meters, residual chlorine meters, conductivity
meters etc.)
This signal must be applied to a cable with a BNC - red pump connector, being careful of the polarity:
Centre wire: positive.
Sheath: negative.
3.2.1 Meaning of two-colour LED
The colour of the LED immediately indicates the type of proportional pump operation, in fact:
Green LED: the HC150 mA pump is in constant mode
Orange LED: the HC150 mA pump is in proportional mode
Below is a table of LED operation:
Colour of the
LED
Status of the
LED
Position of the
regulating knob
Operating status of the pump
Orange
Flashing
Different from 0%
ON
– injection with each flash of the
LED
Orange
Flashing
0%
OFF
– Signals the scale
Quick flashing: 0÷100%
Slow flashing: 0÷20%.
Red
Steady
Different from 0%
OFF
– level alarm
Red
Flashing
Different from 0%
OFF
– temperature alarm
Orange
Steady
Different from 0%
OFF
– input current <= 4 mA
Red
Green
Steady
Flashing
Different from 0%
ON
– input current >20 mA
