PORTABLE TURBIDITY METER (Figure 2-16).
Figure 2-16. Portable Turbidity Meter
(MODEL ROWPU-1 ONLY)
General. The portable (hand-held) turbidity meter is a rechargeable battery powered digital instrument which is used to
measure raw water turbidity and turbidity at sample points (valves) in the water purification process. It is used whenever
turbidity readings are required or when the in-line turbidity meter is not operating.
Pre-Operational Check Out.
Extra care should be taken when handling reference standard or sample cuvettes (Figure
2-13). Surface scratches or finger smudges will cause analysis errors. Handle these items
by the top only.
The instrument is to be connected to the battery charger and the charger is to be kept on
whenever the ROWPU is operated. The turbidity meter is to be operated only when readings
With the instrument not connected to the battery charger (1), turn range selector switch (2) to any range position in order
to observe condition of battery. When charged, the red low battery light (3) will be OFF. If light is on, battery should be
charged overnight before using instrument on battery.
New batteries usually require several cycles of discharging and recharging in order to
obtain maximum life between charges.
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