Liquid Controls T575N User Manual

Page 5

Sponsler, Inc. Model T575N Temperature Compensated Totalizer/Printer

CALIBRATION

At the factory, Model T575N units are set for the gearplate used and calibrated for the engineering units and
product as specified by the customer. This initial calibration is based on a calibration factor (CF) derived from the
reciprocal of the flowmeter “K” factor (sensing element constant) multiplied by 10 (electronics meter factor).

CF = (1/K) x10 = 10/K

Factoring Switches SW1-SW4 allow entry of a four digit Calibration Factor.

The Divider Switch (SW6) allows proper decimal point placement by dividing by 1, 10, 100, 1000 or 10000 so that
zero is not entered into the MSD factor switch (SW1).

SW6 POSITION

DIVIDER

FUNCTION

0 =

does not move decimal

1 =

moves decimal place to right

2 =

100

moves decimal 2 places to right

3 =

1000

moves decimal 3 places to right

4 =

10000

moves decimal 4 places to right

5-9 =

NOT USED

for decimal placement

Calibration Procedure:

Step 1:

Calculate CF using formula: CF = 10/K

Step 2:

Determine Divider required to move decimal point so that zero is not entered into
MSD factoring switch (SW1)

Step 3:

Round CF to four digits (there are four factoring switches)

Step 4:

Dial in SW1-SW4 and divider in SW6

Step 5:

Dial Product Selector switch (SW5) for product being measured.

EXAMPLE 1:
NOTE:

The K-Factor used in this example is for illustration ONLY. Be sure to use the K-
Factor for the turbine flowmeter being used with the unit.

Model T575N is used with a Sponsler model SP1 1/2-CB-NL-B-4 precision turbine
flowmeter

K-Factor = 230 pulses per gallon

STEP 1:

CF = (1/K) x 10
CF = 10/230
CF = .043478

STEP 2:

DIVIDER 10 needed to move decimal point right one place.

STEP 3:

CF = .43478 (ROUND UP to four digits)
CF = .4348

STEP 4:

Dial CALIBRATION factor in SW1-SW4 and DIVIDER in SW6
SW6 @ 1
SW1 @ 4 SW2 @ 3 SW3 @ 4 SW4 @ 8

STEP 5:

SW5 @ 3 (LCO

) for correct temperature compensation curve.