Optimization/Correction Of Problems - Siemens SITRANS F Instruction Manual

Section 2
START-UP
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Ensure pipe is FULL (flowing or not).
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Select "Install Complete?".....INSTALL to Invoke "Initial Makeup" routine.
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Verify "Measured Vs" is accurate for liquid type & temperature (Consult Vs Database)
‰
Set Zero appropriately (AutoZero or ZeroMatic for Reflect, Actual Zero or ReversaMatic for Direct).
‰
After completion of Zeroing, access Flow Display by pressing <MENU> key.
‰
Use <Up/Down Arrows> to scroll through available displays.
DIAGNOSTIC/PERFORMANCE VERIFICATION
‰
Verify Vs is correct for Liquid and Temperature.
‰
Verify Valc is Greater Than 30.
‰
Verify Vaer is Less Than 10 when flowing.
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Check Signal Graph Trace to be acceptable. See reference graphs below.
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CorQ should be >3.0, SigQ should be <10 for Version 1, 2, or MultiPulse mode V3.
‰
For 1011 Transducers, verify "VfMax" is significantly higher than maximum Flow Rate of applica-
tion.
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Set "Hi Flow" at 90% VfMax; Ensure it is higher than Max Application Flow Rate.
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Set "Lo Flow" at –10% VfMax. (For unidirectional flow applications only!)
‰
Set "Lo Flow" at 10% Greater Than Maximum Negative Flow (Bi-Directional Applications).

2.12.2 OPTIMIZATION/CORRECTION OF PROBLEMS

Incorrect "Measured Vs"
‰
Verify actual pipe (outside) diameter matches meter programming.
‰
Verify actual Wall Thickness matches meter programming.
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Verify transducer Type and Size matches meter programming.
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Verify transducer mount method, and spacing positions (indices) match meter programming.
‰
Check actual transducer spacing matches "Ltn" dimension.
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Verify Siganl Graph is acceptable (see below).
‰
Use recommended High Precision or first recommended Universal Transducer.
‰
Verify Liquid Vs in database (take into account actual temperature & pressure).
2-90
1010ENFM-3B