Setting Sample Flow Rate - Hach Anatel PAT700 User Manual

2.4 Setting sample flow rate

The PAT700 is designed to operate with a supply flow rate in the range of 60-300 mL/min.
A flow rate in this range ensures a sufficient flow for proper flushing of the analysis cell
and protects the analyzers from damage due to excessive flow. Following proper
installation of the sample inlet and outlet lines the analyzer flow rate can be verified and
adjusted if necessary. Verify the flow rate by timing the amount of water collected from
the outlet of the analyzer in the graduated cylinder supplied with the analyzer.
1. Access the run modes by touching the <<icon to open the sliding toolbar from the
home screen.
2. Touch the Run Mode icon at the top of the sliding toolbar.
3. At the run mode dialog box, touch the radio button for "Standby". In standby mode
the analyzer's sample valve will open and allow water to continuously flow through
the analyzer without any analysis.
4. Measure the amount of water exiting the analyzer over a 15 second period using the
graduated cylinder.
5. If the flow rate exceeds the analyzer's specification the rate can be adjusted using
the flow control valve. See
6. Return the analyzer to the desired operating mode by selecting the appropriate radio
button in the run mode dialog box.
The flow control valve is set to fully open when the unit is shipped from the factory. To
reduce the flow through the analyzer turn the flow control clockwise until the desired flow
rate is obtained.
Figure 8 PAT700 water flow control valve location
Figure 8.
Installation
Water flow control valve
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