Evoqua WALLACE & TIERNAN MFC, Instruction Manual

Page: 53 / 268

MFC
Functions
4.
53
Installation notes Ambient conditions
The following must be taken into account when installing the
fluoride measurement:
• Select the sample water extraction point that guarantees a
proper mixture of disinfectant and a bubble-free sample water
flow.
• This does not require a certain flow rate.
• The electrode must be immersed at least 2 cm deep into the
sample water.
Please note
No water carrying lines made of copper piping may be installed.
These would distort the measurements.
• If the fluoride electrode is not installed right next to the MFC,
extension cables with plug connectors are available (see 8.
“Complete Devices, Retrofit Kits and Spare Parts" on
page 215).
• If an extension cable is used (max. 50 m), a impedance
converter (see 8. “Complete Devices, Retrofit Kits and Spare
Parts" on page 215) must be used on the electrode in order to
guarantee a stable measuring signal.
• Because the fluoride electrode has a connecting cable, the
impedance converter must be installed between the electrode
extension cable and the connecting cable.
Commissioning
Please note
The fluoride-sensitive membrane of the electrode is protected by a
rubber cap. The rubber cap must be removed before the electrode
is immersed in the sample water.
To prevent damages, do not touch the membrane.