Fox Thermal Instruments FT3 Specifications

Model FT3

®

Thermal Gas
Mass Flow Meter
and Temperature
Transmitter

For Industrial, Environmental,
Energy Monitoring and Process
Control Applications

FM / FMc

ATEX / IECEx

Precision Mass Flow Measurement

An ON

I

CON Brand

399 RESERVATION RD

MARINA, CA 93933

PHONE: [phone]

FAX: [phone]

[e-mail]

www.foxthermal.com

APPROVED!

Smart, Real-Time Mass
Flow Measurement

The Fox Model FT3 measures two
important process variables with a
single instrument, providing isolated

4-20mA and pulse outputs for ow

rate, and a 4-20mA pulse output for
process gas temperature or a second

ow rate output.
Direct mass ow measurement,

exceptional low-ow sensitivity, fast

response, and low maintenance
requirements distinguish the Fox

Model FT3. Virtually immune to

changes in temperature and pressure,

the ow meter delivers repeatable,
accurate mass ow measurement
under varying loads. It’s rugged, no-

moving-parts design is also ideal for
high-vibration industrial environments,

and enhanced EMI immunity makes

it suitable for environments where

electric motors, ignitors or dirty power
may affect instrument performance.

Creative Solutions - Calibration
Validation with Fox Model FT3

Fox Thermal knows that customers

want creative and effective solutions
to some of their common process
problems. Downtime due to
equipment maintenance or calibration

costs money and wastes valuable time.
Calibration Validation of ow meters
in the eld provides assurance of the
functionality of the meter and avoids

the downtime associated with annual
calibrations.

Used in succession, Fox’s CAL-V™

and Zero CAL-CHECK® Tests can

give you the reassurance that your
meter is performing accurately in the
eld without the need to interrupt
ow or send the meter back to the
factory. The tests are quick and easy
to perform at any time and help with

CALIBRATION VALIDATION:
Typical Requirements of Competitive Models

Stop the ow*

Remove meter from pipe*

Disconnect wires from ow meter

Look up data on ow meter’s calibration certicate

Measure electrical characteristics with volt ohm meter

Perform calculations to evaluate ow meter performance

Set process pressure to manufacturer’s calibration pressure

Connect auxiliary test equipment and/or test gases to ow

meter

*When using a packing gland assembly for Zero CAL-CHECK®

NORMAL MEASUREMENT MODE

Sensor Control Signal

SENSOR

SIGNAL

PROCESSING

ELECTRONICS

PowerPro™ Sensor

In normal measurement mode the signal processing electronics control the sensor.

CAL-V™ MODE

Sensor Control Signal

SENSOR

SIGNAL

PROCESSING

ELECTRONICS

PowerPro™ Sensor

In CAL-V™ mode, the microprocessor controls the sensor and determines the resulting electrical
characteristics.

the challenging requirements for

measuring the ow of air and gases.

look-up at any time.

CAL-V™ is an operator-initiated test

MICROPROCESSOR

MASS FLOW

MEASUREMENT

MICROPROCESSOR

CALIBRATION

VALIDATION

Calibration
Validation
PASS/FA IL

that can be performed at any ow rate,

CAL-V™

The CAL-V™ feature is an in-situ
calibration routine that validates the

ow meter’s calibration accuracy by
testing the functionality of the sensor

and its associated signal processing

circuitry. This innovative approach lets
you validate instrument calibration

in the pipe, at process conditions,
with just a push of a button. At the
conclusion of the test, the meter will

display a pass/fail message and the

CAL-V™ data is saved in the meter for

Other Thermal
Flow Meters

FT3 with CAL­V™ & Zero CAL­CHECK®

including zero, and is completed in just
three to four minutes. During the test,

the meter’s microprocessor adjusts

the signal to the sensor elements and
determines the resulting electrical
characteristics. These site-determined
characteristics are compared with the
data that was collected and stored in
the instrument electronics during the

original factory calibration. Matching

data within established tolerances

conrms the meter is measuring
accurately.

Zero CAL-CHECK® Tests

The Zero CAL-CHECK® tests are

used to ensure that the ow meter

still retains its original NIST-traceable

calibration at zero ow. The test can
be performed in one of two ways: In-

situ or Out-of-Pipe.

Required Not Required

In-situ Zero CAL-CHECK®

If zero ow can be established, the

sensor does not need to be removed
and the procedure can be done in

the pipe. If zero ow cannot be
established, a Fox Packing Gland
Assembly is used to remove the sensor

Outputs