Seametrics FT420 Instructions

General Information
The FT420 is a loop-powered microcontroller-based
transmitter/indicator. It displays rate and total, and pro-
vides a 4-20 mA analog signal proportional to flow. A
programmable pulse output, high flow or low flow alarm
are also standard for metering pump control or data
logging.
The rugged cast-aluminum housing is gasketed for maxi-
mum environmental protection, and the electronics are
potted into a solid block of urethane. A membrane key-
pad allows settings to be changed without removing the
cover. The wall mount version comes with brackets for
mounting. An adapter kit (part No. MK20) allows field
mounting on 80-series flow sensors. The FT420 can
also be factory installed on a TX100/200 series sensor
or WT meter.
Features
Sturdy gasketed cover
with electronics
potted in
Removeable foot brackets
for wall mounting
Easy set-up
prompts
Two wire
4-20 mA output standard
FT420 Flow Computer
Instructions
Specifications
Power
Display
Rate
Total
Pulse Output
Input
K factor Range
Pulse Output Range
Flow Alarm Output Range
Temperature
Environmental
10.5
2341678.9
RESET
SET K
SET
4 mA DC (4-20 mA loop),
12-32 VDC
6-digit autorange, 1/2"
character height
8-digit, 5/16" character
height
• 0.1 second open collector
pulse (scaled)
• high alarm or low alarm
• sensor pulse (unscaled)
Pulse frequency + 5 VDC
0.050 - 999999.9
0.1 - 200,000 units/pulse
0.1 - 999999.99
0 C - 70 C
NEMA 4X
Large rate numerals
Triple bosses for
watertight input/output
connections
LT-10605A
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