Operating Fue1010En With Flow Tubes; General Installation Guidelines - Siemens SITRANS F Instruction Manual

Section 6
6.

OPERATING FUE1010EN WITH FLOW TUBES

Models 1010EN1 and 3 and EDN1 and 3 support the use of Siemens 992DFT or 1011FT Flow Tubes.
This extremely versatile in-line transit-time flowmeter system has proven to be a valuable tool for servic-
ing the following applications.
Typical Applications include:
• Controls and Refrigerants
• Fuel Flow Measurement
• Water and Wastewater treatment chemical feed
• Chemical and Pharmaceutical Batching
• Food Processing - Juice, Wine, Beer
• Hydraulic Oil Leak Detection
• Measurement of Additives
• Automobile Assembly and Testing
Typical Industries Serviced include:
• HVAC (Hotels, Airports, Government)
• Power Generation (Nuclear, Fossil, and Hydro)
• Chemical Processing
• Food and Pharmaceutical
• Aircraft Avionics and Ground Support
• Water and Wastewater
• Aerospace
• Automobile Manufacturing
6.1

GENERAL INSTALLATION GUIDELINES

Installing Flow Tubes is a simple operation, but to assure proper installation, refer to both the instructions
in this section and the Installation/Outline drawings that came with your specific Flow Tube. They both
contain important information that you will need for a successful installation.
6.1.1 LIQUID APPLICABILITY AND COMPATABILITY
Successful flow measurement using a transit-time Flow Tube depends on the sonic transmit signal
traveling through the liquid and arriving at the receive transducer without excessive attenuation. Most
liquids are excellent sonic conductors, regardless of their electric or optical properties. Although highly
viscous liquids exhibit a greater degree of sonic attenuation, the 992 and 1011 series Flow Tubes
operate successfully with most of these liquids.
The usual cause of low liquid sonic conductivity is sonic beam scattering due to liquid non-homogeneity.
Thus, liquids that contain gas bubbles or suspended solids are considered unsuitable applications. How-
ever, dissolved gasses and organic solids of a moderate viscosity usually do not cause any problems.
The accuracy of the liquid viscosity entry is important. It governs the degree of Reynolds Number com-
pensation that the flow computer applies to the final rate output. Therefore, flow data errors could result
if you enter an inaccurate viscosity value. Please note that Siemens may be able to provide the correct
liquid viscosity and data for your application.
6-1
1010ENFM-3B