Liquid Controls DMS Setup - Manual (Page 45)

45
Multi-Point Calibration
Once Single Point Calibration is completed, Multi-point
Calibration may be performed on the system. Multi-Point
Calibration calculates percent deviation at specific points
along the calibration curve. This increases overall meter
accuracy across full flow range.
After determining percent deviation of the meter at a
variety of flow rates and entering the information into
LectroCount’s multi-point calibration table, accuracy
corrections are continuously made by the LectroCount
based on the measured flow rate.
There are two ways to obtain multi-point information for
a flow meter:
1. Manufacturer’s data supplied with the meter can be
entered directly.
2. Meter can be field calibrated by proving at various
flow rates.
NOTE: It is not required to enter flow rates in any specific
order. The LectroCount sorts values internally when it
uses the data.
Move pointer to Point Number and press ENTER to open
a list box window with options of 1 to 10. Move pointer
to 1 and press ENTER.
Move pointer to Flow Rate and press enter to open a field
edit window and enter a value in the range 0.00 to 9999.99.
Enter maximum flow rate shown on manufacturer’s data
sheet and press ENTER.
Move pointer to Percent Error and press ENTER to
open a field edit window and enter the error percentage
corresponding to highest flow rate shown for the meter
on the manufacturer’s data sheet. This field can have a
value in the range -3.000 to 3.000.
Select up to nine additional points from the manufacturer’s
data sheet to characterize the remainder of the meter’s
accuracy curve and enter this data in the Flow Rate and
Percent Error fields.
(Multi-point Calibration continued on Page 46.)
Method 1 - Manufacturer’s Data
Supplied with the Meter
(6/6) 1
Units: Gallons
Setup
1
PRODUCT CALIBRATION
Product #: 1
Linearization Mode:
Pointer Number:
Flow Rate:
Percent Error:
Prover Quantity:
Prev Cnfg Main
(6/6) 1
Units: Gallons
Setup
PRODUCT CALIBRATION
Product #: 1
Linearization Mode:
Pointer Number:
Flow Rate:
Percent Error:
Prover Quantity:
Prev Cnfg Main