P620 (G) LOW FLOW CUTOFF
Use this feature to enter the minimum head in units (P005)
or as a percent of span.
Ensure the % symbol is displayed before attempting to enter a value in
percent, (see PROGRAMMING Keypad).
This feature eliminates totalizer activity for flows at or below the cutoff value.
values: 0.000 to 9999 (preset = 5.000 %, or equivalent units)
P621 (G) AUTO ZERO HEAD
Use this feature to calibrate Zero Head (P605), especially if 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)
With "head" steady ...
1. to display the calculated head,
2. Repeat step 1 at least 5 times to verify repeatability,
3. Measure the "actual" head (e.g. 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 (P650).
values: -999 to 9999
PROGRAMMING
PL-507 118
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