27
Proportional dosing pump
At
PCA310
,
PCA320
and
PCA330
a proportional dosing pump could be connected
to the 4-20 mA output. The pump could be used to dose chlorine or acid/alkali as
selected by the user. When the output is 4 mA, the pump must be stopped and when the output is
20 mA, the pump must provide the maximum output.
For
PCA340
two types of outputs are available: 0-20 mA or 4-20 mA for each output.
The recorder outputs could be assigned to Cl, pH, Temperature.(see the right figure)
RS 485
B
A
I
I
For
PCA340
two proportional dosing pumps could be connected to the 4-20 mA outputs. The pump
could be used to dose chlorine and acid/alkali as selected by the user. When the output is 4 mA, the
pump must be stopped and when the output is 20 mA, the pump must provide the maximum output.
RS485
The analyzer has RS485 serial communication with selectable baud rate between
1200 and 9600 Bps. The GSM module
HI504900
is also connected using
the RS485 port.
Note: The RS485 could use also the ground wire to prevent common mode
voltages.
INITIAL PREP
ARA
TION AND INST
ALLA
TION
