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User’s Guide
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e-mail: info@omega.com
FMA 4000
Digital Mass Flow Meters
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® OMEGAnet Online Service Internet e-mail www.omega.com info@ omega.com Servicing North America: USA: One Omega Drive, Box 4047 ISO 9001 Certified Stamford CT 06907-0047 Tel: (203) 359-1660 FAX: (203) 359-7700 e-mail: info@ omega.com Canada: 976 Bergar Laval (Quebec) H7L 5A1 Tel: (514) 856-6928 FAX: (514) 856-6886 e-mail: info@ omega.ca For immediate technical or application assistance: ® USA and Canada: Sales Service: 1-800-826-6342 / 1-800-TC-OMEGA ® Customer Service: 1-800-622-2378 / 1-800
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TABLE OF CONTENTS 1. UNPACKING THE FMA 4000 MASS FLOW METER................................... 1 1 1.1 Inspect Package for External Damage................................................. 1.2 Unpack the Mass Flow Meter............................................................... 1 1.3 Returning Merchandise for Repair....................................................... 1 2. INSTALLATION........................................................................................ 1 1 2.1 Primary
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7. CALIBRATION PROCEDURES.................................................................20 7.1 Flow Calibration...............................................................................20 7.2 Gas Calibration of FMA 4000 Mass Flow Meter................................ 21 7.2.1 Connections and Initial Warm Up..................................................... 21 7.2.2 ZERO Check/Adjustment Adjustment................................................. 21 7.2.3 Gas Linearization Table Adjustm
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1. UNPACKING THE FMA 4000 MASS FLOW METER 1.1 Inspect Package for External Damage Your FMA 4000 Mass Flow Meter was carefully packed in a sturdy cardboard car- ton, with anti-static cushioning materials to withstand shipping shock. Upon receipt, inspect the package for possible external damage. In case of external damage to the package contact the shipping company immediately. 1.2 Unpack the Mass Flow Meter Open the carton carefully from the top and inspect for any sign of concealed ship- ping d
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CAUTION: FMA 4000 TRANSDUCERS SHOULD NOT BE USED FOR MONITORING OXYGEN GAS UNLESS SPECIFICALLY CLEANED AND PREPARED FOR SUCH APPLICATION. For more information, contact Omega7. F Attitude limit of the Mass Flow Meter is ±15 from calibration position (standard calibration is in horizontal position). This means that the gas flow path of the Flow Meter must be within this limit in order to maintain the original calibration accura- cy. Should there be need for a different orientation of the me
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2.2 Electrical Connections FMA 4000 is supplied with a 15 pin “D” connector. Pin diagram is presented in Figure b-1. 2.2.1 Power Supply Connections The power supply requirements for FMA 4000 transducers are: 11 to 26 Vdc, (unipolar power supply) DC Power (+) --------------- pin 7 of the 15 pin “D” connector DC Power (-) --------------- pin 5 of the 15 pin “D” connector CAUTION: Do not apply power voltage above 26Vdc. Doing so will cause FMA 4000 damage or faulty operation. 2.2.2 Output Signa
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2.2.3 Communication Parameters and Connections The digital interface operates via RS485 (optional RS232) and provides access to applicable internal data including: flow, CPU temperature reading, auto zero, total- izer and alarm settings, gas table, conversion factors and engineering units selec- tion, dynamic response compensation and linearization table adjustment. Communication Settings for RS485 / RS232 communication interface: Baud rate: ...................... 9600 baud Stop bit: ..........
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Figure b.1 - FMA 4000 15 PIN “D” CONNECTOR CONFIGURATION PIN FMA 4000 FUNCTION 1 Common, Signal Ground For Pin 2 (4-20 mA return). 2 0-5 Vdc or 4-20mA Flow Signal Output. 3 Relay No. 2 - Normally Open Contact. 4 Relay No. 2 - Common Contact. 5 Common, Power Supply (- DC power for 11 to 26 Vdc). 6 Relay No. 1 - Common Contact. 7 Plus Power Supply (+ DC power for 11 to 26 Vdc). 8 RS485 (-) (Optional RS232 TX). 9 RS232 Signal GND (RS485 GND Optional). 10 Do not connect (Test/Maintenance termi
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3. PRINCIPLE OF OPERATION The stream of gas entering the Mass Flow transducer is split by shunting a small portion of the flow through a capillary stainless steel sensor tube. The remainder of the gas flows through the primary flow conduit. The geometry of the primary con- duit and the sensor tube are designed to ensure laminar flow in each branch. According to principles of fluid dynamics the flow rates of a gas in the two laminar flow conduits are proportional to one another. Therefore, the fl
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4. SPECIFICATIONS FLOW MEDIUM: Please note that FMA 4000 Mass Flow Meters are designed to work only with clean gases. Never try to measure flow rates of liquids with any FMA 4000. F CALIBRATIONS: Performed at standard conditions [14.7 psia (101.4 kPa) and 70 F F (21.1 C)] unless otherwise requested or stated. ENVIRONMENTAL (PER IEC 664): Installation Level II; Pollution Degree II. FLOW ACCURACY (INCLUDING LINEARITY): ±1% of FS at calibration temperature and pressure. REPEATABILITY: ±0.15% of ful
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CAUTION: Omega makes no expressed or implied guarantees of corrosion resistance of mass flow meters as pertains to different flow media reacting with components of meters. It is the customers' sole responsibility to select the model suitable for a particular gas based on the fluid contacting (wetted) materials offered in the different models. INLET AND OUTLET CONNECTIONS: Model FMA 4000 standard 1/4" compression fittings. Optional 1/8" or 3/8" compression fittings and 1/4" VCR fittings are
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5. OPERATING INSTRUCTIONS 5.1 Preparation and Warm Up It is assumed that the Mass Flow Meter has been correctly installed and thor- oughly leak tested as described in section 2. Make sure the flow source is OFF. When applying power to a flow meter within the first two seconds, you will see on the LCD display: the product name, the software version, and revision of the EEP- ROM table (applicable for LCD option only). OMEGA FMA 4000 485 S: Ver1.4 Rev.A0 Figure b-2: FMA 4000 first Banner Scr
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Note: Allow the Digital Mass Flow Meter to warm-up for a MINIMUM of 6 minutes. During initial powering of the FMA 4000 transducer, the flow output signal will be indicating a higher than usual output. This is an indication that the FMA 4000 transducer has not yet attained its minimum operating temperature. This condition will automatically cancel within a few minutes and the transducer should eventu- ally indicate zero. Note: During the first 6 minutes of the initial powering of the FMA 4000
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5.3 FMA 4000 Parameters Settings 5.3.1 Engineering Units Settings The FMA 4000 Mass Flow Meter is capable of displaying flow rate with 23 different Engineering Units. Digital interface commands (see paragraph 8.3 ASCII Command Set “FMA 4000 SOFTWARE INTERFACE COMMANDS”) are provided to: - get currently active Engineering Units - set desired Engineering Units. The following Engineering Units are available: TABLE VI UNITS OF MEASUREMENT FLOW RATE TOTALIZER NUMBER INDEX DESCRIPTION ENGINEERING ENGI
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Note: Once Flow Unit of Measure is changed, the Totalizer’s Volume/Mass based Unit of Measure will be changed automatically. 5.3.2 Gas Table Settings The FMA 4000 Mass Flow Meter is capable of storing calibration data for up to 10 different gases. Digital interface commands are provided to: - get currently active Gas Table number and Gas name - set desired Gas Table. Note: By default the FMA 4000 is shipped with at least one valid calibration table (unless optional additional calibrations
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Local maintenance push button is available for manual Totalizer reset on the field. The maintenance push button is located on the right side of the flow meter inside the maintenance window above the 15 pin D-connector (see Figure c-1 “FMA 4000 configuration jumpers”). Note: In order to locally Reset Totalizer, the reset push button must be pressed during power up sequence. The following sequence is recommended: 1. Disconnect FMA 4000 from the power. 2. Press maintenance push button (do not
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Latch Mode- Controls Latch feature when Relays are assigned to Alarm event. Following settings are available: 0 - Latch feature is disabled for both relays 1 - Latch feature is enabled for Relay#1 and disabled for Relay#2 2 - Latch feature is enabled for Relay#2 and disabled for Relay#1 3 - Latch feature is enabled for both relays. Note: If the alarm condition is detected, and the Relay is assigned to Alarm event, the corresponding Relay will be energized. Note: By default, flow alarm is
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The available K Factor settings are: Disabled (K = 1). Internal Index The index [0-35] from internal K factor table (see APPENDIX II). User Defined User defined conversion factor. Note: The conversion factors will not be applied for % F.S. engineering unit. 5.3.7 Zero Calibration The FMA 4000 includes an auto zero function that, when activated, automatical- ly adjusts the mass flow sensor to read zero. The initial zero adjustment for your FMA 4000 was performed at the factory. It is no
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AUTOZERO IS ON! Figure b-6: FMA 4000 Screen in the beginning of Auto Zero procedure. The Auto Zero procedure normally takes 1 - 2 minutes during which time the DP Zero counts and the Sensor reading changes approximately every 3 to 6 seconds. AUTOZERO IS ON! S: 405 DP: 512 Figure b-7: FMA 4000 during the Auto Zero procedure. The nominal value for a fully balanced sensor is 120 Counts. If the FMA 4000’s digital signal processor was able to adjust the Sensor reading within 120 ± 10 counts
