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ORP calibration (Redox)
ORP sensors have long running-in times. This means that after
calibration with calibration solution, it can take several hours for
the measured value to stabilize.
1 Press the symbol.
2 Press the menu Calibration.
3 Select the “ORP” measurement menu.
4 Press the parameter “Cal. value”.
5 Place the beaker into the bottom clip and fill it with calibra-
tion solution "478 mV" or use the bag with calibration solu-
tion "478 mV" into the bottom clip.
6 Close the sample water inlet and sample water outlet and
briefly open the flow cell drain (drain) to release the pres-
sure. Close the flow cell drain (drain) again.
7 Screw the ORP sensor into the cover of the cell body of the
flow cell.
8 Dip the ORP sensor through the top clip at least 2 cm deep
into the calibration solution and move it slightly until the indi-
cated pH value remains constant.
9 Press the “Calibration” button. An input field opens.
10 Use the keypad to enter the value to be calibrated.
11 Press "Enter" to save the entry.
12 Remove the ORP sensor from the top clip.
13 Screw the ORP sensor into the cover of the cell body of the
flow cell.
14 Open the sample water inlet and outlet again.
Evoqua Water Technologies LLC
6 Jefferson Drive, Coventry RI 02816
+1(800) 832-8002 (toll-free) +1 (401) 821-2200 (toll)
www.evoqua.com
© 2018 Evoqua Water Technologies GmbH
Subject to change without notice
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