Evoqua WALLACE & TIERNAN MFC, Instruction Manual

Page: 153 / 268

MFC
Operation
5.
153
5.4.1 Temperature calibration
1 Starting from the basic display in the main menu select the
"Calibration" menu.
2 Select the "Temperature" menu item
The "Calibr. temperature" window (Display 2.1.5 “Calibration -
Menu 2.1" on page 147) appears on the graphic display.
3 Select the "Cal. temperature" parameter.
4 Perform comparative temperature measurement.
5 Use the arrow keys to enter the determined value.
6 Confirm the entry.
This concludes the temperature calibration.
Please note
°C or °F can be selected in the "Temp. unit" menu. In the "PT1000“
menu, the automatic temperature compensation with the multi-
sensor can be switched on or off.
5.4.2 Calibration of the 3 electrode cell
Calibration of the 3 electrode cell for Cl
2
, KMnO
4
, O
3
, ClO
2
and
Cl
2
++ (pH-compensated)
During calibration of the 3 electrode cell, perform a zero point
calibration and a measurement value calibration (DPD).
The calibration process is nearly the same for chlorine, chlorine
dioxide, ozone and potassium permanganate.
The difference lies in the fact that some of the reagents are
measured with a photometer and others with a colour meter.
Zero point calibration 1 Starting from the basic display in the main menu select the
"Calibration" menu.
2 Select the measurement to be calibrated from the menu, e.g.
Cl
2
free (1).
3 Select the "Cal.zero" parameter.
4 Close the ball valve on the sample water inlet.
Please note
When the sample water supply has been stopped, the display first
drops rapidly, and after approximately one minute slowly
approaches zero. During commissioning it is essential to wait for 5
minutes, even if the display should show "0.00" or flash after a few
seconds.