Omega Products FMA6601 User Manual

MULTI PARAMETER
GAS MASS FLOWMETERS

For Clean Gases

FMA6600 Series

Starts at

$

1195

 Multi-Drop Capability

of Up to 256 Units
(for RS485 Option)

 Stores Calibration Data

for Up to 10 Different
Gases

 Supports 10 Different

Engineering Units
Including User Defined

 Programmable 12-Digits

Totalizer Indicates Total
Gas Volume

 Flow Alarm Limits for

High and Low Gas Flow
with Relay Output

 Pressure Alarm

(FMA6700) Limits for
High and Low Gas
Pressure with
Relay Output

 Temperature Alarm

(FMA6700) Limits for
High and Low Gas
Temperature with Relay
Output

 Digital (RS232 or

RS485) and Analog
Outputs Operate
Simultaneously

 Internal Conversion

Factors for Up to
32 Gases

Interface

All features of the FMA6600 and
FMA6700 Series flow meters can
be accessed via the local four
button keypad and LCD. The digital
interface operates via RS485
(optional RS232 available) and
provides access to applicable
internal data including: flow,

temperature, and pressure
readings, auto zero, totalizer and
alarms settings, gas table,
conversion factors and engineering
units selection, dynamic response
compensation and linearization
table adjustment.

The analog interface provides
0 to 5 Vdc, 0 to 10 Vdc or
4 to 20 mA outputs for flow,
pressure and temperature
(jumper selectable).

Auto Zero

The FMA6600 and FMA6700
Series supports automatic sensor
zero offset adjustment that can be
activated locally via keypad or
remotely via digital interface. The
auto zero feature requires
absolutely no flow through the
meter during auto zero process.
Provisions are made to either start,
stop or save the current auto zero
value via digital commands.

D-X

D

FMA6701, $1495,
shown actual size.

Totalizer

The total volume of the gas is
calculated by integrating the actual
gas flow rate with respect to time.
Both keypad menu and digital
interface commands are
provided to:

• Set the totalizer to ZERO

• Start the totalizer at a preset flow

• Assign action at a preset total
volume

• Start/stop totalizing the flow

• Read totalizer

Totalizer conditions become true,
when the totalizer reading and the
“Stop at Total” volumes are equal.

Flow Alarm

High and Low gas flow ALARM
limits can be preprogrammed via
keypad or remotely via digital

interface. ALARM conditions become true when the
current flow reading is equal or higher/lower than
corresponding values of high and low alarm levels.
Alarm action can be assigned with preset delay
interval (0 to 3600 seconds) to activate the contact
closer (separate for High and Low alarm).

Pressure Alarm (FMA6700 Series)

High and Low gas pressure ALARM limits can be
preprogrammed via keypad or remotely via digital
interface. Pressure alarm conditions become true
when the current pressure reading is equal or higher
than corresponding values of high pressure alarm
settings or equal or lower than corresponding values
of low pressure alarm settings. Alarm action can be
assigned to activate the contact closer (separate for
High and Low pressure alarm).

Temperature Alarm (FMA6700 Series)

High and Low gas temperature ALARM limits can be
preprogrammed via keypad or remotely via digital
interface. Temperature alarm conditions become true
when the current temperature reading is equal or
higher than corresponding values of high temperature
alarm settings or equal or lower than corresponding
values of low temperature alarm settings. Alarm
action can be assigned to activate the contact closer
(separate for High and Low temperature alarm).

Engineering Units

The flow set points, measured gas flow and associated
totalizer data are scaled directly in engineering units
via the front panel keypad or digital interface.

The following units of measure are supported: %F.S.,
L/min, L/h, mL/min, mL/h, SCFH, SCFM, LbPH,
LbPM, User Defined EU.

Multi-Gas Calibration

The FMA6600 Series is capable of storing primary
calibration data for up to 10 gases. This feature allows
the same FMA6600 Series to be calibrated for multiple
gases while maintaining the rated accuracy on each.

Standard 10-Point NIST Calibration

Optional up to 9 additional 10-point calibration may be
ordered at an additional charge of $250 per gas.

Conversion Factors

Conversion factors for up to 32 gases are stored in the
FMA6600 and FMA 6700 Series. In addition the
provision is made for a user defined conversion factor.
Conversion factors may be applied to any of the ten gas
calibrations via keypad or digital interface commands.

Contact Closure

Two sets of dry contact relay outputs are provided to
actuate user supplied equipment. These are
programmable via local keypad or digital interface
such that the relays can be made to switch when a
specified event occurs (e.g. when a low or high flow,
pressure or temperature alarm limit is exceeded or
when the totalizer reaches a specified value).

Leak Integrity

1 x 10-9sccs of Helium maximum to the outside
environment.

Many fittings of various
materials and styles are

available. See pages T-36

to T-80 or visit omega.com

SPECIFICATIONS

Accuracy:

FMA6700: ±1% of FS including linearity [0 to 50°C and

0.35 to 6.8 bar (5 to 100 psia)]
FMA6600: ±1% of FS at calibration conditions [101 KPA

(14.7 psia) and 21.1°C (70°F)]

Pressure Range: 0 to 6.8 bar (100 psig) (measurement)
Pressure Accuracy: ±1% of FS
Temperature Range: 0 to 50°C (measurement)
Temperature: ±1°C accuracy
Repeatability: ±0.15% of full scale
Response Time: Units up to 10 LPM @ 1 second, units

greater than 10 LPM @ 2 seconds to within
±2% of setpoint over 25 to 100% of full scale

Temp. Coefficient: 0.15% of full scale/°C or better.
Pressure Coefficient: 0.01% of full scale/psi

(0.07 bar) or better

Max Gas Pressure: 6.8 bar (100 psig)
Max Burst Pressure: 13.6 bar (200 psig)
Max Pressure Drop: 8 psi (at 100 L/min flow)
Gas & Ambient Temp: 5 to 50°C (41 to 122°F)
Output Signals: Linear 0 to 5 Vdc (3000 ⍀ min load

impedance); 0 to 10 Vdc (6000 ⍀ min impedance);
4 to 20 mA optional (500 ⍀ max loop resistance).
Maximum noise 20 mV peak to peak.

Input Power: May be configured for three different options:
±15Vdc (±200 mA maximum); +12Vdc (300 mA maximum)

optional; +24Vdc (250 mA maximum) optional; Circuit
boards have built-in polarity reversal protection. Resettable
fuses provide power input protection.

Materials in Fluid Contact: 316 stainless steel, FKM
O-rings. EPDM or Perfluoroelastomer O-rings optional

Connections:

Models >= 15 LPM: Standard
Models 20 to 50 LPM: Standard
Models 60 to 100 LPM: Standard

Display: 128 x 64 graphic LCD with backlight

(up to 8 lines of text)
Calibration: Standard one 10 points NIST calibration.

Optional up to 9 additional calibrations may be ordered for
an additional charge of $250 per gas.

CE Compliance: EN 55011 class 1, class B; EN50082-1
Environmental (per IEC 664): Installation Level II;

Pollution Degree II

Approximate Shipping Weights:

Models up to 15 SLPM: 1.68 kg (3.7 lb)
Models from 20 to 100 LPM: 1.97 kg (4.34 lb)

1

⁄4" compression fittings

1

⁄4" compression fittings

3

⁄8" compression fittings

D-X