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More information about how a Flow meter works in this link.
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 RS-232 available) and
provides access to applicable
internal data including: flow,
temperature, pressure reading, 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 or 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. 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 (0-3600 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 $300 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 10-9 sccs of Helium maximum to
the outside environment.
† All amounts shown in EUR, GBP, or USD Note: Units come with complete operator’s manual and NIST traceable certificate for Nitrogen. Power supply sold separately. Note: Flow rates are stated for Nitrogen at STP conditions (21.1C (70F) at 1 atm). Add “-I” to model number for 4 to 20 mA output instead of the standard 0 to 5 V output. Add “-12V” to model number to power unit on 12 Vdc, add $50 to price. Add “-24V” to model number to power unit on 24 Vdc, add $100 to price. Add “-K” to model number to change to Kalrez O-rings, add $364 to price. Add “-B” or “-E” to model number to change to Buna or EPR Orings, no additional charge. Add “-VCR” to model number to change to VCR fittings add $100 to price. Add “-RS232” to model number to replace RS-485 communications, no additional cost. For each additional calibration add -(*) to the part number and $300.00 to the cost.
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