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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 specic points

along the calibration curve. This increases overall meter

accuracy across full ow range.

After determining percent deviation of the meter at a

variety of ow rates and entering the information into

LectroCount’s multi-point calibration table, accuracy

corrections are continuously made by the LectroCount

based on the measured ow rate.

There are two ways to obtain multi-point information for

a ow meter:

1. Manufacturer’s data supplied with the meter can be

entered directly.

2. Meter can be eld calibrated by proving at various

ow rates.

NOTE: It is not required to enter ow rates in any specic

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 eld

edit window and enter a value in the range 0.00 to 9999.99.

Enter maximum ow rate shown on manufacturer’s data

sheet and press ENTER.

Move pointer to Percent Error and press ENTER to

open a eld edit window and enter the error percentage

corresponding to highest ow rate shown for the meter

on the manufacturer’s data sheet. This eld 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 elds.

(Multi-point Calibration continued on Page 46.)

Method 1 - Manufacturer’s Data

Supplied with the Meter

(6/6) 1

Units: Gallons

Setup

PRODUCT CALIBRATION

Product #: 1

Linearization Mode:

Pointer Number:

Flow Rate:

Percent Error:

Prover Quantity:

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