Level Control; Commissioning The Pumps; Set Point Regulation; Acid Or Alkaline Dosing - Etatron DLX-DLXB pH/M Serie Normas De Instalación, Uso Y Manutención

6.4 – 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 led are ON: the pump is OFF. The level control
alarm goes ON with 5 seconds delay.
6.5 – COMMISSIONING THE PUMP
A. Install the metering pump as described in Chapter 3.0 "INSTALLATION".
B. Place the electrode in the electrode holder.
C. Connect the electrode to the metering pump by means of a male BNC connector, rotating it through 90°.
D. Powering the pump, on the display will appear the software release (e.g. A 1), which shows the updated soft-
ware version. After a while the pump goes in measuring mode and it is ready to work.
E. The manual flow setting is made with RIGHT and LEFT buttons (1 and 3), by setting the frequency injec-
tions from 0 to 100% the maximum flow rate of the pump.
F. Dip the pH probe into the buffer solution (e.g. 7 pH) and push the CAL button, the red led "ZERO" will start
flashing to indicate the zero regulation probe.
G. Adjust with the RIGHT and LEFT buttons the value indicated on the display until reading the value of the
buffer solution. To pass to next step push the CAL button, the red led "GAIN" will start flashing.
H. Dip the pH probe in the buffer solution (e.g. 9 pH ÷ 4 pH), second calibration point.
I. Adjust with the RIGHT and LEFT buttons the value indicated on the display until reading the value of the
buffer solution. To pass to manual temperature compensation push the CAL button.
J. The pump displays the previous temperature setting (default 25° C), to modify that setting, adjust the instal-
lation temperature with RIGHT and LEFT buttons, then push CAL button to end the calibration procedure.
If during the calibration operation no button is pushed for 60 seconds the pump will automatically goes back to
measuring mode.
6.6 – SET POINT REGULATION
To adjust the setpoint push SET button, the red led PULSE will start flashing, on the display will appear the pre-
vious set value, adjust with RIGHT and LEFT buttons the required value. Push the SET button to confirm and
the pump will go into the hysteresys programming.
The pump shows the value previously set e.g. 00H (hysteresys ± 0.05pH), by using RIGHT and LEFT buttons it's
possible to modify this parameter with steps of 0.1pH (01H=0.1pH). Push the SET button to confirm the choose,
the pump goes to the delay time setting.
The display shows the value of the delay in seconds related to the activation or disactivation of the set point from
the moment the reading value passes across the setpoint (e.g. d02 = 2 seconds delay).
Push the SET button to confirm. The pump will go in measuring mode.
6.7 – ACID OR ALKALINE DOSING
The pH/M metering dosing pump can control the pH level dosing acid or alkaline chemical to reduce or increase
pH. F1 function allows to select the required type of intervention (acid or alkaline). If user has to dose an acid
liquid to reduce pH, he will select F1A, otherwise dosing alkaline liquid select F1D.
6.8 – PROPORTIONAL FUNCTIONING
The F2 function disactivated (F2D) allows a manual ON/OFF control, while F2 activated (F2A) a proportional con-
trol. With F2A the pump actives a regulation of the pulses proportional to the set point. For example if the set
point is 7 pH and the reading is 3 pH the pump works at the maximum frequency (the user can always modify
the percentage of the flow by acting on the RIGHT and LEFT buttons 0-100%). The pump will work at full fre-
quency until 4 pH (difference from the set point 3 pH), after this point will start regulating the pulses by reduc-
ing until completly stopping when the set point is reached. If user activates F3 it's possible to reduce the meas-
uring range (from 3 to 1.5 pH).
6.9 – FUNCTIONS
The functions programming, enabled or disabled by the user, allows to the pump to change some settings which
make the pump suitable for a lot of applications. In this paragraph it's explained the way to set the functions
with a brief description, for further information please look the respective paragraph
Function F1D
Function F1A
Function F2D
Function F2A
Function F3D
Function F3A
* Imposted by factory
Alkaline dosing (lower than the set point)
Acid dosing (over the set point)*
ON/OFF functioning*

Proportional functioning

Proportional functioning with range 3.00 pH*
Proportional functioning with range 1.50 pH
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