Universal Flow Monitors FlowStream FP-EF-2N-360SCFH-CO2-X1B User manual

UNIVERSAL FLOW MONITORS, INC.
1755 East Nine Mile Road
PO Box 249
Hazel Park, MI 48030-0249
TEL [phone] FAX [phone]
http://www.flowmeters.com
™
Laminar Mass Flowmeters
User Manual
Series: FP

FPMAN-1-190214 Page 2
TABLE OF CONTENTS
PROPRIETARY NOTICE............................................................................................................. 3
NAMEPLATE EXAMPLE............................................................................................................ 4
ELECTRICAL SAFETY LABEL ................................................................................................. 4
GENERAL SPECIFICATIONS .................................................................................................... 5
ELECTRICAL SPECIFICATIONS............................................................................................... 5
OPERATION................................................................................................................................. 6
APPLICATIONS ........................................................................................................................... 6
Using FlowStream at Varying Temperatures............................................................................. 6
Reference Conditions for Mass Flow Measurement.................................................................. 7
WIRING DIAGRAMS................................................................................................................... 8
KEYPAD OPTIONS...................................................................................................................... 9
USER MENU............................................................................................................................... 10
FLOW HI ................................................................................................................................. 10
FLOW LO................................................................................................................................ 11
OUTPUT SPAN....................................................................................................................... 11
THRESH .................................................................................................................................. 11
AVG......................................................................................................................................... 12
GAS.......................................................................................................................................... 12
USER FACTOR....................................................................................................................... 12
RESET...................................................................................................................................... 13
EXIT......................................................................................................................................... 13
AVAILABLE FLOW SIZES....................................................................................................... 14
ORDERING INFORMATION.................................................................................................... 15
DIMENSIONS ............................................................................................................................. 17
RETURN MATERIAL AUTHORIZATION ............................................................................... 18
WARRANTY INFORMATION.................................................................................................. 20

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PROPRIETARY NOTICE
The information contained in this publication is derived in part from proprietary and patented
data. This information has been prepared for the express purpose of assisting in installation,
operation, and maintenance of the instruments described herein. Publication of this information
does not convey any rights of use or reproduction other than in connection with the installation,
operation and maintenance of the equipment described herein. Universal Flow Monitors, Inc.
reserves the right to change the information contained in this publication at any time and without
prior notice.

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NAMEPLATE EXAMPLE
ELECTRICAL SAFETY LABEL
Serial numbers are formatted as YY MM ID 000
YY = year, MM = month, ID = product identifier, 000 through 999 = three-digit sequential
number.
FP-EF-2N-360SCFH-CO2-X1B
FP-EF-2N-360SCFH-CO2-X1B

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GENERAL SPECIFICATIONS
Flow Ranges: 2 SLPM/5 SCFH F.S. to 1300 SLPM/2600 SCFH F.S.
Turndown Ratio: 400:1
Accuracy: ± 1% of reading
Repeatability: ± 0.2% of full-scale
Maximum Measurable Flow: Up to 125% of full-scale, gas dependent
Pressure Effect on Accuracy: Less than ±0.04% of reading/ PSI
Temperature Effect on Accuracy: Less than ±0.04% of reading/ °F
Response Time: 100 msec
Pressure Drop: 2.5 PSI at maximum flow (port to port), gas dependent
Gases: Air, Argon, Nitrogen, CO2, Oxygen, Helium, Hydrogen,
Methane, and user selectable
Gas compatibility: Non-corrosive, non-condensing
Maximum Operating Pressure: 150 PSIG
Sensor Burst Pressure: 200 PSIG
Operating Temperature: -25 to 80 °C (-13 to 176 °F)
Process Connections: 1/8”-1/4”-3/8”-1/2”-3/4” NPT. SAE, BSPT, BSPP also available
Display: Rate, total, pressure, temperature, multi-gas, alarms, engineering
units
Wetted Parts: Sensors: Ceramic, silicon, gold, epoxy, RTV
Flow body: Stainless steel, anodized aluminum, Viton®
Enclosure Rating: Type 4
ELECTRICAL SPECIFICATIONS
Analog output: 4-20 mA (2-wire loop powered)
Alarms: 2 independent open-collector outputs (high/low flow rate)
Open-Collector Rating: 30VDC at 50 mA
Electrical Connection: 5-pin connector
Supply Voltage: 10–30 VDC
Supply Current: 22 mA @ F.S. flow (includes over-range)

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OPERATION
FlowStream flowmeters accurately measure the mass flow rate of most gases. The flow rate is
determined by measuring the pressure drop across a unique internal restriction, known as
Laminar Flow Element (LFE). The restriction is designed such that the gas molecules are forced
into moving in parallel paths along the entire length of the passage for the entire range of
operation of the device. Unlike other pressure-flow measuring devices, the relationship between
pressure drop and flow is linear in laminar flowmeters.
FlowStream mass flowmeters utilize an absolute pressure sensor along with a temperature
sensor to compensate for density variations of the gas. When combined with the differential
pressure (volumetric flow) output, the mass flow rate of the gas can be determined.
Laminar Flow Illustration
APPLICATIONS
FlowStream flowmeters are designed to work with non-corrosive, non-ionic, clean, dry gases
only. Introduction of liquids to the internal sensors will damage the unit, and the repair is not
covered under warranty. Relative humidity of the gas can be as high as 100%, as long as proper
installation guarantees that no internal condensation will occur. A 50-micron filter and/or dryer
may be required for some applications.
Using FlowStream at Varying Temperatures
Even though FlowStream flowmeters measure true mass flow, rapid variations in ambient
and/or gas temperature may affect performance. This is due to the time lag of the internal
temperature sensor and the slow heating and cooling of the flowmeter body. It is highly
recommended that through proper installation the following two objectives be met:
There be minimal difference between gas temperature and ambient temperature;
Rapid temperature variations be avoided.

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Since the temperature sensor is embedded inside the sensor block, if ambient temperature is
different from gas temperature, there would be a discrepancy between what the sensor reads and
the true gas temperature. The flowmeter body would track ambient temperature while gas
temperature would heat/cool the body at a different rate.
Likewise, if temperature variation is rapid, the flowmeter body may not follow it quickly enough
due to the mass of the metal flow chamber, which in turn would result in inaccurate
measurement of gas temperature.
For optimal performance, always allow two to four hours from the time the ambient and gas
temperatures are stabilized to when the first flowmeter reading is taken.
Reference Conditions for Mass Flow Measurement
Although the correct units for mass are expressed in grams, kilograms, etc., it has become
somewhat standard that mass flow rate is specified in SLPM (standard liters per minute), SCFH
(standard cubic feet per hour) or other similar units.
This means that the mass flow rate is calculated by normalizing the volumetric flow rate to some
standard temperature and pressure (STP). By knowing the gas density at that STP, one can
determine the mass flow rate in grams per minute, kilograms per hour, etc. STP is usually
specified at sea level conditions; however, no single standard exists for this convention. UFM
uses STP of 70° F and 14.7 PSIA.
Note: If used outside the parameters specified in this manual, the proper operation of the
flowmeter cannot be guaranteed.

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Load Resistor vs. Power Supply
WIRING DIAGRAMS
4-20 mA Output
Pin
Wire color
Function
1
Brown
+24VDC
2
White
0VDC
3
Blue
N/U
4
Black
N/U
5
Gray
N/U
4-20 mA with Alarm Option
Pin
Wire color
Function
1
Brown
+24VDC
2
White
0VDC
3
Blue
Alarm 1
4
Black
Common
5
Gray
Alarm 2
Alarm wiring example:
Using 10K pull-up resistors,
Alarm 1 or 2 output is pulled high when deactivated and goes to ground when activated
(transistor conducting).
Power Connector
5 Pins

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KEYPAD OPTIONS
UP: Consecutive (short) button press cycles between the following information on top of the
display.
a. Gas: Current selected Gas
b. Pressure: Gas pressure in PSI
c. Pressure: Gas pressure in PSIA
d. Totalizer: Total volume of gas according to the selected units.
e. Temperature: Temperature in degree Celsius
f. Temperature: Temperature in degree Fahrenheit
Options are saved in the memory so that next time you turn the power on it will remember
the display settings.
DOWN: Consecutive button press cycles between the different flow units in SCFH and SLPM.
Once selected, the setting is saved into the memory of the device.
To reset the totalizer, press SET until the LCD shows “TARING”. Release the SET button
immediately, and the totalizer will be reset.
To tare the meter (at zero flow) press SET until the LCD shows “TARING”. Keep holding the
SET button (for 5 seconds) until the LCD shows “TARED” and the flow output will be set to
zero.
5 seconds

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CHG: Pressing CHG once shows the user menu. Once the desired menu item is selected, you
can do one of the following:
To change the set points
Press SET to choose the particular menu item.
Consecutive pressing of SET will cycle through the different digits of the set point.
Press UP or DOWN to increase or decrease the particular digit. Pressing SET will set
the digit.
Long press SET until “SAVED” is displayed on the upper row of the LCD.
Press CHG to exit out of current menu item and change the next item.
To change Gas Setting
Consecutive pressing of SET will cycle through the different Gas options.
Once the desired gas is selected, keep holding the SET button down until “SAVED”
is displayed on the upper row of the LCD.
To exit out of the menu
Navigate to “EXIT” menu item with consecutive CHG presses. Press SET to exit out. An
alternative option is to not touch any buttons for 5 seconds, as the program will exit the
user menu after 5 seconds of inactivity. Note: this option does not save the recent
settings.
USER MENU
FLOW HI: High set point for flow alarm. (This example shows the detailed steps for changing
a set point. All other menu items use the same method.)
Press the SET button to change. Range is 0-100% FS. If set to 0, alarm is disabled. Alarm
hysteresis is 1% FS.
When first digit starts blinking, use the UP and
DOWN buttons to adjust the digit, then press SET to
move to the next digit.
Blinking