Evoqua Wallace & Tiernan Depolox 3 plus, Manual, Page: 62 / 157

WT.050.560.001.UA.IM.0714 48
Depolox
®
3 plus ReSIDUAl ANAlYZeR
eVoQUA W3T140188
ror condition continues, it may be necessary to adjust the cell volt-
age Upot: Go to SIGNAL DIAG. and menu “Cl
2
cell current”.
NOTE: New units are factory calibrated. No Upot adjustments are
required on new units during initial calibrations.
If the display still does not read 0.00 mg/l after calibration, adjust
the potentiometer Upot so that the displayed cell current is ±0.5 µA
(turning clockwise reduces the current) (see Figure 3.5). The current
will change very slowly. Wait one half hour and check again. Perform
calibration again.
Figure 3.5 - Upot Adjustment
e. Let the sample water flow again.
NOTE: When there is no key pressed for five minutes, the Depolox® 3 plus
returns to the basic display.
• Span calibration
a. After zero calibration wait at least two minutes. Then take a sample at
the measuring cell. Determine the residual value of this sample.
b. Press the

key until the menu “DIS span” is reached. Press the

key
to open the menu.
c. Press keys

or

until the displayed value agrees with the manually
measured value.
d. Store the value using the

key. The chlorine measuring cell is now
calibrated. In case of an error message, refer to paragraph 4.1.1, Errors.