Seametrics FT400 User manual

FT400-Series
RATE/TOTAL INDICATOR
INSTRUCTIONS
• FT415
• FT420
FT400-SERIES RATE TOTAL/INDICATOR INSTRUCTIONS

TABLE OF CONTENTS
General Information
General Information, Features, Specifications............................................................................... Page 1
Installation
Wall Mount, Meter Mount, Panel Mount ....................................................................................... Page 2
Connections, FT420 Option 98, -98 Relay Board Specifications ..................................................... Page 3
Connection Diagrams
FT415, FT420, FT420-65 ............................................................................................................ Page 4
FT420-98, FT420/EX Magmeter .................................................................................................. Page 5
FT420/EX Magmeter/Dual Power Supply (-27 Option) ................................................................... Page 6
(Quick) Settings
Quick Settings Overview ............................................................................................................. Page 7
Settings
K-Factor, Reading in Other Units .................................................................................................. Page 8
Set K, Set P/Flow Alarm, Set 20 mA, Set Decimal Point, Set Time Unit .......................................... Page 8
Operation
Resettable Totalizer; 4-20 mA Output, Pulse Output, FT415 Battery Change ................................... Page 9
Troubleshooting
Problems, Probable Causes, to Try ........................................................................................ Back Page
TABLES AND DIAGRAMS
Features, Specifications ............................................................................................................. Page 1
Meter Mount, Panel Mount.......................................................................................................... Page 2
Dual Relay Board (Option -98) Specifications ................................................................................ Page 3
Connections: FT415, FT420, FT420-65 ........................................................................................ Page 4
Connections: FT420-98, FT420/EX Magmeter .............................................................................. Page 5
Connections: FT420/EX Magmeter/Dual Power Supply ................................................................. Page 6
Quick Settings Overview ............................................................................................................. Page 7
K-Factor..................................................................................................................................... Page 8
Resettable Totalizer.................................................................................................................... Page 9
Troubleshooting Problems, Probable Causes, to Try ................................................................ Back Page

TABLE OF CONTENTS
TABLES AND DIAGRAMS
Page 1
GENERAL INFORMATION
The FT400-Series flow computers are microcontroller-based
indicator/transmitters that display flow rate and total and
provide output signals. The FT415 is battery-powered and
provides a scalable pulse output. The FT420 is powered
by external DC voltage and has both pulse and 4-20 mA
analog outputs. When the FT420 is being used in the 4-
20 mA mode, it is a “two-wire” or “loop-powered” device,
meaning that the 4-20 mA output signal doubles as its
power supply.
The addition of a dual-relay output board (FT420 only) allows
for certain applications requiring contact output isolation
(e.g., certain metering pumps and water treatment controls).
Dual solid state relays provide exactly the same pulse out-
put as the standard unit, and each can signal one external
device. A non-resettable total is also available. The FT420
can be ordered in a plastic enclosure with a 115 Vac power
supply for use with mechanical meters, or with a built-in 115
Vac/12-24 Vdc dual power supply for magmeters.
Both the FT415 and the FT420 can be factory-mounted on
the meter (-M) or remotely wall mounted with the brackets
provided (-W). The FT420 is also available as a panel mount
(-P) with an open back for easy installation in the user’s
own electrical enclosure. Most FT400’s can be converted
from wall-to-meter or meter-to-wall mount configurations
after installation if needed.
Housings for the -W and -M models are rugged cast alu-
minum, potted and gasketed for maximum environmental
protection. A membrane keypad allows settings to be
changed without removing the cover. (Password protection,
a standard feature, can be used to prevent settings from
being changed.)
**Includes password protection for tamper prevention
when needed
Lower Housing
Setup Keys**
Cover Screws
Electronics Module
Wall-Mount Brackets
Strain Relief
Display
FEATURES
SPECIFICATIONS*
Lithium "C", 3.6 Vdc, replaceable, 3-5 year life
6-digit autorange, 1/2" character height
8-digit, 5/16" character height
Scaled Pulse output; 0.1 sec pulse duration, 6.1 Hz max (or High Alarm output or Low Alarm output on FT420 only)
Sensor pass-through Pulse output (unscaled)
None
0.1 - 9999999.9 units/pulse
Micropower GMR Sensor (square wave)
1.0 - 150 pulses/second
.001 - 99999.999
.01 - 999999.99
-30˚ to 65˚ C (-22˚ to 148˚ F)
NEMA 4X, IP66
CE EN 61000
Power
Display Rate
Total
Outputs Current Sinking Pulse
Analog
Pulse Output Range
Input
Input Range
K-Factor Range
Flow Alarm Output Range
Operating Temperature
Environmental
EMC
FT415 FT420
*Specifications subject to change • Please consult our website for current data (www.seametrics.com).
**Includes password protection for
tamper prevention when needed
12-30 Vdc, 4mA (4-20 mA when loop-powered)
6-digit autorange, 1/2" character height
8-digit, 5/16" character height
4-20 mA loop; 13V maximum voltage drop
0.1 - 9999999.9 units/pulse
5V pulse or contact closure
1.0 - 1,500 pulses/second
.001 - 99999.999
.01 - 999999.99
-30˚ to 65˚ C (-22˚ to 148˚ F)
NEMA 4X, IP66
CE EN 61000

SET
Panel Cutout
R .38 Max, Typ.
.20 Max.
Panel
Thickness
1.50
3.85 typ.
.36
3.620
+.03/-.00
Typ
.70 x .18 Clamp
Area, Typ
Gasket
INSTALLATION
Page 2
Wall Mount. To mount an FT400-Series indicator to the
wall, hold the unit in the desired position, mark the holes
in the mounting feet, drill and mount with screws. With the
FT420W-65 option, first remove the front cover to gain ac-
cess to the mounting screw holes.
A meter-mounted FT400-Series can be converted to a wall
mount using an MK20 mounting kit.
Meter Mount. If the FT400-Series indicator was ordered as
an -M model, the housing is already directly mounted to the
flow sensor and needs no further installation.
An FT400-Series module can be converted from a wall-to
a meter-mount using the MK10 adapter kit that includes a
lower housing and associated hardware as follows:
1) Remove the strain relief through which the flow sensor
cable runs.
2) Cut the cable to about 6” in length. Carefully strip the
cable jacket to expose the three colored wires (red,
white, and black) inside.
3) Route the wires through the threaded connector
pre-installed in the bottom of the housing.
4) Start the threaded connector into the female thread on
the top of the flow sensor. Be sure to match the
oblong shape on the bottom of the housing to the
depression on the top of the flow sensor.
5) Using an ordinary screwdriver inserted in one side of
the slot (see drawing), tighten the screw as much as
possible.
6) Strip the wire ends, make the connections to the
FT400-Series indicator as shown in Connections
Diagrams, and then use the cover screws to attach the
indicator to the top of the housing.
Panel Mount (FT420 Only). Using the “Panel Cutout” draw-
ing as a guide, cut a square hole in the panel. Remove
the clamps from the back of the FT420P and insert the
indicator unit through the cutout, taking care that the panel
sealing gasket is in place between the front of the panel
and the flange of the indicator. Hold the indicator in place
while starting the screw of one of the two clamps. Finger
tighten the screw, then install the other clamp. When both
are in place, firmly tighten the clamps with a small wrench
or nut driver.
Sensor Wires
Sensor Wires
Meter Mount
Panel Mount

Page 3
INSTALLATION
Connections. To connect the FT400-Series flow computer
to a flow sensor or an external device such as a chemical
metering pump, follow the Standard Connections diagrams
on pages 4-6.
If the FT420's 4-20 mA current signal is not required,
connect the power terminals to any 12-30 Vdc voltage
source.
Dual Relay Output (Option -98). If you purchase the FT420
with option 98, the required component will come prein-
stalled, and no extra procedures are required.
If you are retrofitting an existing installation of an FT420
with the dual relay board, please follow the instructions
below:
1) Peel the backing off of the double-stick tape and affix
it to the bottom of the relay board (part #30221).
2) Carefully attach the board to the FT420 as shown in
the FT420-98 Connection diagram on page 5. Be sure
that the red wire faces the “Sensor Input” side of the
FT420, and that the white wire faces the “Pulse
Output” side.
3) Connect the white wire to the “Pulse Scaled” positive
terminal, and the red wire to the “Power 4-20 mA”
positive terminal.
4) Connect devices to the relays as desired.
Caution: If output is being used to
control an external device, such as a
metering pump, do not connect the de-
vice until programming is completed.
If malfunction or incorrect program-
ming of the output could cause per-
sonal injury or property damage, separate safeguards
must be installed to prevent such injury or damage.
-98 Relay Board Specifications
Output Voltage 0-130 VAC/DC
Output Current (each output)
Temperature 50˚ C 85˚ C
Current Limit 100 mA 50 mA
Max Pulses/Second 5
Contact Time Per Output 100 ms

(Passes flow sensor pulse on to
another control without scaling)
Micropower
Sensor
Battery Type:
Lithium "C, 3V, replaceable
Pulse Responsive
Metering Pump
Red
White
Black
Sensor
Input
Outputs
Pulse Passthru Pulse Scaled
+-
s
- +
- +
Current sinking
polarity-sensitive
(Passes flow sensor
pulse on to another
control without
scaling)
Pulse Responsive
Metering Pump
PULSE PASSTHRU PULSE
SCALED
SENSOR INPUT
POWER 4-20 mA
Flow Sensor
Red
White
Black
S
12-32 VDC
Loop Power Supply*
4-20 mA Device
-
++-
+
-
+
-
+
-
+
-
BASIC CONNECTIONS
*FT420 ONLY
Current sinking
polarity-sensitive
Page 4
CONNECTION DIAGRAMS
Connections for FT420-65 (115 Vac Option)
Connections for FT420/3-Wire Mechanical Meter
FT415 Standard Connections
Caution: Do not apply
external power to the FT415.
3-Wire
Mechanical
Meter
AC IN
DC OUT
HOT
GROUND
-
+
POWER
4-20 mA
+
-
FT420
Lower Housing 115 Vac
NEUTRAL
LINE

CONNECTION DIAGRAMS
Page 5
(Passes flow sensor
pulse on to another
control without
scaling)
PULSE PASSTHRU
SENSOR INPUT POWER
4-20 mA
Flow Sensor
Red
White
Black
S
12-32 Vdc
Loop Power Supply
+-
+
-
+
-
+
-
+
-
Electronic
Metering Pumps
30221
white
wire
red
wire
Relay Board
PULSE SCALED
Isolated Contact
Connections for FT420-98 (Dual Relay Output Option)
Connections for FT420/EX Magmeter
+
_
S
+
_
+
_
+
+
_
_
+
_
+
_
Reverse Output
(EX Opt-15 only)
Sensor
Input
Power
Forward Output
EX SERIES
24 Vdc Power
Power
4-20mA
Pulse
Scaled
Pulse
Pass-Thru
To
Proportional
Feed
Metering
Pump
FT420
NOTE: Outputs may be paralleled
to switch up to 200 mA AC/DC

CONNECTION DIAGRAMS
FT420 Display with 4-20 mA Output
Caution: Important! Do not connect power to the power supply until all connections have
been made and conrmed correct, and the cover has been put back into place.
+
_
S
+
_
+
_
+
_
+
+
_
_
+
_
+
_
+_
Reverse Output
(Option-15 only)
Power
Forward Output
EX-SERIES
4-20 mA Device
(e.g. pump, PLC)
24 Vdc
Power
Sensor
Input
Power
4-20mA
Pulse
Scaled
Pulse
Pass-Thru
FT420
24 Vdc
Power
Caution: It is essential for safety and proper operation to use a ground connection for the
115 Vac power. Do not use this power supply without proper grounding.
When running the FT420 with a magmeter (which requires power), the FT420 must be connected to two power supplies, one for the
magmeter and one for the 4-20 mA loop. You may either use a dual power supply (available from Seametrics as the PC42), or two
single power supplies (one of which may be the 4-20 mA loop itself). See diagrams below.
FT420/4-20 mA Output with Two Separate Power Supplies
FT420/4-20 mA Output with PC42 Dual Power Supplies
Page 6
115Vac, 50/60Hz
Earth
Ground
350 mA Max
100 mA Max
Pre-wired power cord
Replace if required
4-20 mA Device
Analog Output
PWR
SW
+ +
FT420
Display Module
Power Input
Sensor Input
(N/C)
PC42 Dual Power Supply
Pulse Output
Power Input
(N/C)
(N/C)
EX80/EX100 Series
Magmeter
24V12V
AC AC
G
AC AC
S
+
+
-
-
+
-
+
-
-
-
-
+

(QUICK) SETTINGS
Page 7
START UP DISPLAY
SET
00001.000
SET K
0.00
MIN 209.8
RESET
0000010.0
SET P
209.8
MIN
PRESS DISPLAY
SET
SET
SET
K is the number of pulses the flow sensor provides
for every gallon of flow. Find it on the fitting
(80-Series) or chart (100/200-Series) or on the
SeaMetrics website.
P is the number of gallons per pulse desired on the
scalable pulse output. (Example: P=1 is one pulse
per gallon.) Skip without changing if you are not
using the pulse output.
20 is the 20 mA maximum analog output. Set the
flow rate you want to match maximum output.
Example: 250 gpm maximum expected flow, “set
20” to 250. The analog output will scale to 4 mA
at zero flow, 20 mA at 250 gpm*. This setting appears
on the FT420 ONLY.
d is the decimal point. It toggles back and forth
with the . Set as many decimal places as
needed. For higher flows, no decimal allows
maximum number of whole digits.
MIN is the time base, for example, gallons per
minute. Use the to select sec/min/hour/day.
0001000.0
SET 20
SET
d
Large digits display instantaneous flow rate (GPM).
Small digits display total flow (since last reset).
QUICK SETTINGS OVERVIEW
See following page for step-by-step instructions on changing these settings
Pass through all settings and return to original display to save settings.
*NOTE: Use the up arrow key to reach your desired digit. Then press the left arrow key to move
to the next digit. Repeat the process until the entire number is entered.

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 reading K = xxxx gives the desired number. For
depth-adjustable sensors (101,201,115,215 models),
look in the instruction manual under your pipe size. For
EX meters, 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 blinking. 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. FT420 only. 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 func-
tion, 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
80-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,
using 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 gal-
lons (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.)

OPERATION
Page 9
Operation of the Pulse Output. If the pulse output is being
used (either standard electronic or relay-type), it should
pulse for 0.1 second every time the set number of gallons
has been totalized. If a pulse-responsive metering pump
is properly connected to this output, it should stroke peri-
odically. If this does not occur, see Troubleshooting, back
page.
FT415 Battery Change. The expected average life of
the battery ranges between 3-5 years depending on the
frequency of the input. The battery is easily pulled and
replaced. When the battery is removed, all of the settings
will be retained.
Resettable/Non-Resettable Totalizer. Unless the unit has
been ordered with the non-reset option, a RESET prompt is
visible in the lower right corner above the up arrow key, when
the display is in use. Press the up arrow key at any time
to reset the totalizer to zero. (Note: If you need to reset a
unit that has been ordered with a non-resettable totalizer,
contact your distributor.)
SET
SEC
MIN
HR
DAY
1234.1
123456.7
RESET
This key resets total to zero
when in normal run mode.
Operation of 4-20 mA Output (FT420 Only). If the 4-20 mA
output is in use and is correctly connected, the signal should
vary between 4 mA and 20 mA in proportion to the flow, with
the top flow rate set by the user (see Settings, page 8). At no
time should the signal drop below 4 mA. A reading between
0 and 4 mA indicates a fault of some type, typically in the
loop power supply or the connections (see Troubleshooting,
back page). In the rare instance that the 4-20 signal fluctu-
ates excessively (“paints”) it may need to be damped by
additional averaging. Contact Seametrics for information on
how to increase filtering.
CAUTION: Do not touch up Arrow button
unless you intend to RESET Total to
Zero. TOTAL IS NOT RECOVERABLE.
SET
SEC
MIN
HR
DAY
CAUTION: During a battery change, the
totalizer will reset to a previous total,
which represents the last auto-backup
(auto backups occur at approximately
4 minute intervals). If it is necessary to
save the exact current total at the time of the battery
change, save before removing the battery as follows:
1) Simultaneously press the SET and up arrow keys
2) Press SET again
3) Again simultaneously press the SET and up arrow
keys

LT-65200063-D
5/18/10
Seametrics Incorporated • 19026 72nd Avenue South • Kent, Washington 98032 • USA
(P) 253.872.0284 • (F) 253.872.0285 • 1.800.975.8153 • www.seametrics.com
TROUBLESHOOTING
Problem Probable Cause Try...
Display blank No power to the unit Check for minimum 12 Vdc at power
terminals
Short in sensor circuit Disconnect sensor, see if display returns
(zero flow rate)
Battery dead or loose (FT415 only) Wiggle battery, replace if over three years old
Display missing segments Damaged display module Contact distributor for return/replacement
Display reading meaningless Unit’s microcontroller crashed Disconnect and reconnect power, if problem
characters repeats, contact distributor for
return/replacement
Battery nearly dead Replace battery if over three years old
Display reads normally, Wrong K-factor or time base entered Enter correct K-factor from meter, fitting, or
flow rate incorrect manual
Display reads normally, Wrong pulse output setting Use “Set P” to correct pulse output setting
incorrect pulse output
Polarity reversed on pulse output terminals Reverse leads
Display reads normally, but Wrong 20 mA setting Use “Set 20” to correct target top flow rate
no (or incorrect) 4-20 mA output
(FT420 only)
Inadequate loop power supply voltage Check voltage (For 4-20 mA applications,
24 Vdc recommended)
Polarity incorrect in 4-20 mA loop circuit Compare to Connections diagram
Display reads zero when Flow sensor failed Consult flow sensor manual for how to test
there is flow
Break in flow sensor circuit Check for continuity with multimeter
Flow sensor not battery-compatible Check flow sensor model number for
“micropower option”
Display reads flow rate when Long flow sensor wire, running parallel to Reroute wire or change to shielded wire
there is none power wires
Flow sensor malfunction See flow sensor manual to check
Flow “jitter” (oscillating slosh) reads as flow Consult factor y for “anti-jitter” setting