Siemens SITRANS LUT400 Series Operating Instructions Manual page 504

2.15.1. Primary Measuring Device (PMD)
The type of primary measuring device (PMD) used.
Values
The LUT400 is pre-programmed for common PMD flow calculations. If your
PMD is not listed, use a Universal Flow calculation. See
support
2.15.2. Auto Zero Head
Calibrates 2.15.3.5.Zero Head Offset (defined in 2.1.1.Units) based on actual
head measurements
Values
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:
2.2.1.Low Calibration Point
•
2. 1 2. 1 .2.Process Temperature
•
With HEAD steady...
a)
b)
The deviation between the entered head value and the calibrated value, is
stored in
A5E33329501 SITRANS LUT400 (HART) – OPERATING INSTRUCTIONS
OFF (no calculation)
*
EXPONENTIAL DEVICES
RECTANGULAR FLUME BS-3680
ROUND NOSE HORIZONTAL CR. BS-3680
TRAPEZOIDAL FLUME BS-3680
U-FLUME BS-3680
FINITE CREST WEIR BS-3680
THIN PLATE RECT. WEIR BS-3680
THIN PLATE V-NOTCH WEIR BS-3680
RECT. WEIR CONTRACTED
ROUND PIPE
PALMER BOWLUS FLUME
H-FLUME
UNIVERSAL HEAD FLOW
on page 116.
.
Range: -60.000 to 60.000
Default: 0.000
Measure the actual head (e.g. with a tape measure or solid rule)
Enter the actual head value
2.15.3.5.Zero Head Offset
Universal calculation
.
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