24
7.30pH
fig.4
The display shows that pump does not work at 00% if pH is 7.30. Make sure that arrow is on “7.30 pH” to change this
value, then use “UP” and “DOWN” keys to enter a new value. Use “RIGHT” key to move on next value. Once on “00%”,
change it with “UP” and “DOWN” keys.
b) -> 100%
7.80pH
fig.5
The display shows that pump works when pH is 7.80. Make sure that arrow is on “7.80pH” to change this value, then use
“UP” and “DOWN” keys to enter a new value. Use “RIGHT” to move on next value. Once on “100%”, change it with “UP”
and “DOWN” keys. Press “E” key to confirm values and quit from programming mode. Display shows for a few seconds:
DATA SAVED. To exit from program mode press “RIGHT” key twice. Now the pump will modify proportionally its own dosing
capacity in the range between 7.30pH and 7.80pH. On previous example, dosing mode is for “acid”.
probe calibration
To obtain a reliable measurement it is necessary (during installation) calibrate the probe. To do this, two buffer solutions
are needed: a 7.00pH buffer solution and a 4.00pH or 9.00pH buffer solution. Proceed as follows:
1) Measure buffer solution temperature and verify if it is the same printed on solution’s label.
2) Insert probe’s connector (blue colour) into pump’s input connector.
3) Remove protective cap from probe and wash it into water. Then dry it.
Into “Setup” menu (fig.3), choose “2)Calib” then press “E” key. The display shows:
R: 7.20 pH
C: 7.00 pH
fig.6
“R” means buffer solution reading value and “C” the calibration to refer to. During the calibration the “R” value could be
different from the buffer solution value. Wait a stable reading in “R”. Dip probe in a 7.00 pH buffer solution and use “UP”
and “DOWN” keys to change the value in “C:” to have buffer solution value. Wait a stable reading in “R:” then press “E”
key to confirm this first calibration. Pump will show:
R: 7.00 pH
C: 4.00 pH
fig.7
Remove the probe from first buffer solution and repeat the cleaning procedure. Then dip probe into second buffer solution
(for example 4.00 pH) and use “UP” and “DOWN” keys to change the value in “C:” to have buffer solution value. Wait
a stable reading in “R:” then press “E” key to confirm. The pump will show the new values for a while and will return
to main menu.
59mV / pH
-
000
mV
fig.8
If calibration process fails the pump will show “PH CALIB FAILED”. Not changing any value the program will return to
“Calib” mode. To exit press “RIGHT” key twice.
Summary of Contents for AMS DIGITAL
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