LaMotte 2020 ClearTrace - Manual (Page 11)

5. Rotate the Turbidity System out of the way and drill the other three
mounting holes.
6. Place all four bolts with washers and tighten. Use shims if necessary
to insure the sample chamber is level.
3.2 Plumbing
The Turbidity System has an INLET, an OUTLET and a DRAIN.
Barb fittings are provided for the INLET and OUTLET in the event that
3/8 inch ID tubing is used.
When piping is used instead of tubing, remove the barb fittings to install ¼
inch NPT threaded pipe for the INLET, OUTLET and DRAIN.
OUTLET and DRAIN Plumbing Recommendations: Use straight ¼ inch
NPT threaded pipe that extends to a vented drain. Pipe restrictions that
result in back pressure for OUTLET and DRAIN are not allowed.
INLET Plumbing Recommendations: Use 3/8 ID tube or ¼ inch NPT
threaded pipe from sample source.
Flow rate must be between 250 to 750 ml/min (4 to 12 gph). If the source
is under pressure, use an appropriate flow or pressure valve to obtain
consistent flow. The turbidity sample chamber has an overflow weir that
must not be restricted.
3.3 Valve Position for Operation
10
Measure
• Inlet valve open
• Drain valve closed
Water goes in the
INLET and out the
OUTLET. The sample
chamber should be full
Drain Sample Chamber
• Inlet valve closed
• Drain valve open
Drain sample chamber
and wipe clean prior
to calibration.
Calibration
• Inlet valve closed
• Drain valve open
When sample chamber
is empty and clean, pour
in 20 NTU standard until
it overflows to the
OUTLET (approx.
135 mL).