Liquid Controls SP3000 User Manual

Page 24

3.5

SETTING THE VARIABLES

The variables determine how the input signals are interpreted by the software to display and output the
compensated flow. The parameters required for proper calculation are determined by the Computation,
Engineering Units, and Hardware Selections. The unit will automatically prompt for the required
parameters.

Use the numeric keypad to input the required variables. The key sets the decimal point when entering
a numerical value. The key acts as a backspace (erases the last digit typed) when entering a
numerical value. The key enters the data into memory.

To access the Variable Menu:

Display Shows:

Press:

Sponsler V6.13 MS197
Set Variables?

Select Setup Item:

to advance Variable Menu

Pressure input

to backup menu

to access Pressure input

sub-menu

3.51

SETTING THE PRESSURE VARIABLES

The Pressure Variables determine how the input signals from channel 2 are interpreted. The
Pressure sub-menu is the same for all Computation and Hardware selections. The Engineering
units selected determine the pressure input units. The pressure input is always the gage pressure
of the line.

NOTE:
The Pressure sub-menu is replaced by a second temperature sub-menu if the Computation is Del-
Heat-Liquids.

The Pressure input is not required for Liquids-Mass or Volume computations. The functionality of
the input terminals and the sub-menu remain active and may be used if desired.

The Pressure Input Sub-menu & Definitions of Required Data:

Select Setup Item:
Pressure input?

At input = Minimum --
Lo press?

Enter the gage pressure value represented by the
lowest analog input (i.e. 4mA=10 PSIG. Enter 10)

At input = Maximum --
Hi press?

Enter the gage pressure value represented by the
highest analog input (i.e. 20mA=500 PSIG. Enter
10)

Atmospheric Pressure --
Barometric?

This value is added to the input gage pressure to
calculate the absolute pressure value (i.e. 14.696
PSIA. Enter 14.696)

CLR

ENT