Hach-Lange CL17 USER MANUAL - Manual (Page 31)

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System Startup
4.3 Supply the sample
Note: Make sure the pressure plate is securely attached to avoid backflow of the sample into
the reagents.
Start sample flow through the instrument by opening the supply valve (item 19 in Figure 7
on page 16 ). Allow the pressure in the tubing to stabilize and check for leaks.
Until the surface of the sample cell becomes completely wetted, bubbles may cling to the
sample cell and cause erratic readings. This condition is temporary. Its duration depends
on the sample properties.
4.4 Supply power to the analyzer
The power switch is located inside the enclosure door in the recessed area to the left of
the colorimeter block. Set the POWER (–/O) switch to ON (–) and allow the analyzer to
operate for approximately two hours to ensure the system is completely wetted with
reagents and sample.