Siemens HydroRanger 200, Instruction Manual

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7ML19985FC03 HydroRanger 200 – INSTRUCTION MANUAL Page 173
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P620 Low Flow Cutoff [6 relay model]
Eliminates totalizer activity for flows at or below the cutoff value.
Use this to enter the minimum head in units (P005) or as a percent of span.
P621 Auto Zero Head [6 relay model]
Calibrates Zero Head (P605) based on actual head measurements.
Use this parameter when the reported head is consistently high or low by a fixed amount.
Before using this feature, verify the following parameters are correct:
• Empty (P006)
• Temperature (P664)
• Offset Reading (P062=0)
• Zero Head Offset (P605)
Procedure, with “head” steady
1. Press TRANSDUCER to display the calculated head.
2. Repeat step ONE at least FIVE times to verify repeatability.
3. Measure the actual head (with a tape measure or solid rule).
4. Enter the actual head value.
The deviation between the entered Empty (P006) value and the calibrated Empty value is
stored in Offset Correction (P652). Alternatively, the Empty parameter (P006) can be
corrected directly.
Primary Index
Single Point Model Dual Point Model
Global Transducer
Values
Range: 0.000 to 9999
Preset = 5.000 %, or equivalent units
Altered By
• P005 Units
Related
• P007 Span
Primary Index
Single Point Model Dual Point Model
Global Transducer
Values
Range: -999 to 9999
Related
• P006 Empty
• P062 Offset Reading
• P605 Zero Head
• P664 Temperature