Seametrics FT400-Series - Manual (Page 10)

Page 8
SETTINGS
K-FACTOR
At a minimum, every FT400-Series flow computer must
be programmed with the “K-factor”. (This is the number
of pulses that the meter produces per gallon of flow.) If
you wish the FT400 to read in units other than gallons,
see below.
The K-factor on any Seametrics flow sensor fitting or in-line
meter can be found on the model-serial label. The line read-
ing K = xxxx gives the desired number. For depth-adjustable
sensors (110, 210, 150, 250 models), use the calculator
on our website.
Set K. Begin by pressing the SET key once. The prompt SET K
should appear on the display. The digit to the far right will be blink-
ing. Use the up arrow key to reach your desired value. Then press
the left arrow key to move to the next digit. Repeat the process
until the entire number is entered. (Note that the decimal is fixed
at three places. If you only have two decimal places for your K-
factor, enter a zero for the third digit.) Press SET to advance. (Note:
If unable to set K-factor, the unit is "locked" to prevent tampering.
Please contact your Distributor for assistance.)
Set P/Flow Alarm. At this screen you may select between pulse
output (P) or flow alarm (A) functions. If the pulse output and
flow alarm features are not being used, this step can be skipped.
The P (pulse output) setting does not affect anything if it is not
being used.
Set P is the default that appears on a new FT400-Series. On an
FT400 that has been previously set up with flow alarm function,
an A will appear on this screen. To move between P and A screens,
firmly press all three keys for 5-10 seconds, then use the up arrow
to scroll through the three options: P, AL HI (high flow alarm) and
AL LO (low flow alarm).
Set 20 mA (FT420 Only). Press the SET key to advance to SET
20, to set the flow rate, in volume units per time unit, at which 20
mA is desired. Use the up arrow key to reach your desired value.
Then press the left arrow key to move to the next digit. Repeat
the process until the entire number is entered. The processor
will automatically scale the 4-20 mA loop accordingly, with 4 mA
at zero flow.
Set Decimal Point. Press the SET key again for the D prompt.
Pressing the up arrow key switches among no decimal place, one
decimal place and two decimal places.
Set Time Unit. When the SET key is pressed again, a
blinking time unit appears. Press the up arrow key
to select SEC (seconds), MIN (minutes), HR (hours) or
DAY (days) (for example, gal/min, or gal/hr).
To save settings and return to normal operation after entering
settings, press SET again. When the unit is connected to an
operating flow sensor, the rate (larger digits) and total (smaller
digits) indicator numbers should appear in the display.
Find Your K-Factor Here
10031295
MF81T-P200
K: 53.6
READING IN OTHER UNITS
Changing Volume Units.
The default K-factor units are
pulses per gallon. To read your total in metric or other
units instead, the standard K-factor must be converted to
the desired volume units. For example, to read in pulses
per liter, the K-factor must be multiplied by the applicable
number shown below.
NOTE: Both rate & total will read in whatever units you choose.
To Convert K to: Multiply by:
Liters .26418
Cubic Meters 264.18
Fluid Ounces .0078
Cubic Feet 7.48
800-Series
Fixed Depth Meter
Changing Time Units: To read your rate in liters per sec-
ond (for example), convert the K-factor volume units as
shown above and change the time units to Seconds, us-
ing the Set Time Unit instructions at right.
Set P. From this screen, follow the same process as for Set K
to enter the desired pulse rate. This is the number of gallons
(or whatever units are programmed) between pulses. (Note:
Using the pulse output function disables the high and low flow
alarm functions.) (6.1 Hz max output)
Set Flow Alarm. From the A screen, use the up arrow key to
choose either AL HI or AL LO and then press the SET key to set
the alarm rate. Use the up arrow and left arrow as above to
reach the desired digits. (Note: Using the flow alarm function
disables the pulse output function.)