Loop Leader PD6620 Series Loop-Powered Flow Rate/Totalizers
Instruction Manual
20
Available Unit Classes and Units
The meter has preprogrammed rate and time base
units. The following are the available units to choose
from:
Rate Time Bases (
TIME
)
/SECOND
Units per second
/MINUTE
Units per minute
/HOUR
Units per hour
/DAY
Units per day
Rate Units (
RATE
)
GAL/
(T)
Gallons per time unit (T)
L/
(T)
Liters per time unit (T)
IGAL/
(T)
Imperial gallons per time unit (T)
M3/
(T)
Cubic meters per time unit (T)
BBL/
(T)
Barrels per time unit (T)
BUSH/
(T)
Bushels per time unit (T)
cuYD/
(T)
Cubic Yards per time unit (T)
cuFt/
(T)
Cubic Feet per time unit (T)
cuIn/
(T)
Cubic Inches per time unit (T)
LiBBL/
(T)
Liquid barrels per time unit (T)
BBBL/
(T)
Beer barrels per time unit (T)
HECtL/
(T)
Hectoliter per time unit (T)
AF/
(T)
Acre-Foot per time unit (T)
CUSTOM/
Custom unit per time unit (T)
Note:
for access to additional predefined units, you
must disable the totalizer. See Disabling the Totalizer
(
TOTAL
)
on page
Error! Bookmark not defined.
.
Setting Custom Units (
CUSTOM
)
When the desired unit of measure is not available, a
custom unit may be programmed. Select the
CUSTOM
menu to enter a custom unit name.
Text values are set using the
Right
and
Up
-
Arrow
buttons. Press
Right-Arrow
to select next character
and
Up-Arrow
to increment character value. The se-
lected character will flash. Press and hold the
Up
or
Right
-
Arrow
buttons to auto-increment or decrement
the character. Press
Enter
to accept the character.
Notes:
•
Press and hold the
Right-Arrow
while no
character is being edited to erase all charac-
ters to the right of the flashing character
•
Press and hold
Up
or
Right
-
Arrow
to auto-in-
crement or decrement a selected character.
•
All text values, including tags and alarm mes-
sages, are set in a similar fashion.
Scaling Example
The 4-20 mA input can be scaled to the appropriate
values for a given application. The 4 mA input
(input 1) should have a corresponding display value
(display 1) which represents the low end of the pro-
cess value range being measured by the transmitter.
Likewise, the 20 mA input (input 2) should have a dis-
play value (display 2) which represents the high end
of the process value range.
For example:
If the meter is setup to accept a
4-20 mA input and display the flow of a pipe whose
rate of flow is between 0 and 100 gal/s, the transmit-
ter would send a 4 mA signal when there is zero flow
and a 20 mA signal when there is maximum flow. The
meter should be programmed to interpret these inputs
on a display range of 0-100, so that at 4 mA the meter
will display 0 and at 20 mA the meter will display 100.
Processes which require a non-linear scale can be
accommodated using the linear (
LINEAR
), exponent
(
EXPONENT
), and square root (
SQROOT
) functions
available in the Advanced menu. See
A signal source is not needed to scale the meter;
simply program the inputs and corresponding display
values.
