Xylem FT420 User Manual

FT400-Series

9 001:2008

ISO

RATE/TOTAL INDICATOR
INSTRUCTIONS

• FT415

• FT420

FT400-SERIES RATE TOTAL/INDICATOR INSTRUCTIONS

CERTIFIED COMPANY

TABLE OF CONTENTS

General Information

General Information, Features, Specications .................................................................................................. Page 1

Installation

Wall Mount, Meter Mount, Panel Mount ........................................................................................................... Page 2

Connections, FT420 Option 98, -98 Relay Board Specications ..................................................................... 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, Specications ..................................................................................................................................... Page 1

Meter Mount, Panel Mount ................................................................................................................................ Page 2

Dual Relay Board (Option -98) Specications ................................................................................................... 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

GENERAL INFORMATION

The FT400-Series ow computers are microcontroller-based
indicator/transmitters that display ow 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 output as the
standard unit, and each can signal one external device. A non­resettable 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.

FEATURES

Electronics Module
Display

Setup Keys**

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 congurations after

installation if needed.

Housings for the -W and -M models are rugged cast aluminum,
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

Cover Screws

Lower Housing

Strain Relief

Wall-Mount Brackets

SPECIFICATIONS*

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

*Specications subject to change • Please consult our website for current data (www.seametrics.com).

FT415 FT420

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 duration 6.1 Hz max) (or High Alarm output or Low Alarm output)

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

**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; 24-30 Vdc

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

Page 1

INSTALLATION

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, rst remove the front cover to gain access

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

ow 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 ow 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 ow sensor. Be sure to match the

oblong shape on the bottom of the housing to the

depression on the top of the ow 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.

Sensor Wires

R .38 Max, Typ.

Panel Cutout

.70 x .18 Clamp
Area, Typ

3.85 typ.

Meter Mount

Sensor Wires

Panel Mount

3.620

+.03/-.00

Typ

.36

.20 Max.
Panel
Thickness

1.50

Panel Mount (FT420 Only). Using the “Panel Cutout” drawing
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 ange 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, rmly tighten the

clamps with a small wrench or nut driver.

Page 2

SET

Gasket