Routine Maintenance
Page 54 of 111
chamber surfaces with a clean rag, pour clean water inside the chamber and suck out the
water again – repeat this procedure until water and the rags appears clean.
TURBIDITY
The Turbidity Module is equipped with a wiper unit that effectively removes fouling from
the optical parts. The flow through the chamber removes most solids and keeps them from
settling. In order to clean and flush away solids manually, please turn VALVE 2 to DRAIN,
then remove the wiper unit and pour clean water into the measuring chamber.
PH/TEMPERATURE
The pH electrode is kept cleaned by the flow of water. In order to clean and flush away
solids manually, please turn VALVE 1 to DRAIN, then remove the pH/temperature sensor
and pour clean water into the measuring chamber. Cleaning of the electrode is done using
clean water until the glass tip of the electrode is free from fouling while ensuring that the
tip of the electrode remains moist during the whole operation.
Be careful not to damage the glass tip of the electrode by mechanic impact.
8.1.3 WMP
When inspecting the impeller pump, please note that wear and tear inside the pump is
normal due to the pump principle. The function of the pump will be OK until the wear and
tear inside the pump will result in the pump pressure and/or flow being too low to trigger
the flow sensor.
When this happens, the pump impeller and end cover will need to be replaced. Therefore,
it is recommended to always have an impeller, end cover, wear plates and shaft seal in
stock as spare parts.
8.1.4 WMPH
Check that the pump pressure is not unnecessarily high. High pressures will result in
reduced lifetime of the pump hose. Pressure recommendation: 0.8…2.0 bar. Pressure and
flow can be adjusted by means of the safety valve/pressure regulating valve in the WMPH
cabinet.
Check that the rollers and the hose are sufficiently lubricated. If the rollers and hose are
not sufficiently lubricated the lifetime of the pump hose will be reduced due to increased
friction heat. Service of the gear is not necessary.
For hose replacement, refer to maintenance instruction MI6100-014.
It is recommended to always have spare parts in stock.
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