20
Controller Installation
4.1 Unpacking the Instrument
Remove the 950 Flow Meter from its shipping carton and inspect it for any visible
damage. Contact Hach Customer Service at 1-800-227-4224 if any items are missing or
damaged.
4.2 Choosing the Proper Site
The accuracy of your flow measurements greatly depends on the suitability of your
monitoring site. Select sites that have normalized flow and minimal turbulence.
Turbulence can make it difficult to detect an average velocity in the flow stream.
Obstructions, vertical drops, pipe bends, and elbows can create turbulence and affect the
accuracy of your measurements.
contains suggestions for preventing turbulence.
4.3 Mounting Options
4.3.1 Wall Mounting (Optional)
Wall mounting the 950 Flow Meter requires the optional Wall Mounting Bracket (P/N.
2743). This bracket provides stable, secure mounting for the flow meter and provides
clearance for removing the power supply while the unit is installed. Connect the flow
meter with four ¼-20 screws (provided) using the four threaded inserts on the back of the
case. (See
).
Table 1 Suggestions for Preventing Turbulence
Site Condition
Suggested Remedy
Outfalls
Place the sensor in at least ten times the maximum expected level upstream of the outfall.
Vertical drops in the
channel floor
Place the sensor in at least ten times the maximum expected level upstream of the vertical drop.
Place the sensor in at least ten times the maximum expected level downstream of the vertical drop.
Elbows, sharp turns,
and “Y” connections
Place the sensor in at least ten times the maximum expected level upstream of the impediment.
Place the sensor in at least ten times the maximum expected level downstream of the impediment.
Содержание Sigma 950
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Страница 20: ...18 Introduction...
Страница 34: ...32 Basic Programming Setup...
Страница 50: ...48 Sensor Installation...
Страница 82: ...80 Maintenance...
Страница 83: ...81 Appendix A Program Flow Charts Figure 22 Overview of Basic Program Menus...
Страница 84: ...82 Program Flow Charts Figure 23 Setup Flow Chart...
Страница 85: ...83 Program Flow Charts Figure 24 Options Flow Chart...
Страница 86: ...84 Program Flow Charts Figure 25 Alarms Menus Flow Chart...
Страница 87: ...85 Program Flow Charts Figure 26 Calibration Menus Flow Chart Page 1...
Страница 88: ...86 Program Flow Charts...
Страница 102: ...100 Programming Features...
Страница 106: ...104 Primary Devices Head Measurement Locations...
Страница 126: ...124 SCADA Modbus System Guidelines...