Installation
21
J
Flow
A through 20 A are suitable for the piping to the turbidity detector. In the turbidity detector, be
sure to run samples upward from below.
Install a valve (V-2) for flow rate adjustment at the outlet of the turbidity detector. If samples
are supplied in-line and this valve is throttled, measurements can be made while pressure is
maintained. This makes it possible to suppress the formation of air bubbles inside the turbidity
detector.
Install a manually-operated ball valve (V-1) at the shortest distance possible from the inlet of
the turbidity detector. Collect calibration solution by operating this valve.
Install three valves (V-3) for sampling, (V-5) for cleaning water, and (V-4) for drain in the
forward direction of the valve (V-1).
Moreover, for samples that may easily contaminate pipes, it is recommended to install air
pipes so that sampling pipes can be cleaned from the opposite direction. Install a check valve
along the air pipeline for prevention of reverse flow.
If zero calibration water, cleaning water and tap water are used, receive the water using a
receiving water tank and send the water by a pump to prevent the contamination by reverse
flow. It is recommended to install a check valve along this pipeline, too.
For low-turbidity sample water (tap water and swimming pool water, etc.), use as zero water
the water prepared from a sample filtered with ultra filters. Perform zero calibration while
running zero water without leaving any accumulated water.
Air
Drain
Check valve
Filter
V-4
V-2
(V-7)
V-1
V-3
V-5
V-6
Turbidity detector
Zero
water
Zero
Sample water
