Gebruiksaanwijzing /service van het product FMA 4000 van de fabrikant Omega
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Servicing Nor th America: USA: One Omega Drive, Box 4047 ISO 9001 Certified Stamford CT 06907-0047 T el: (203) 359-1660 F AX: (203) 359-7700 e-mail: info@ omega.com Canada: 976 Bergar Laval (Quebec) H7L 5A1 T el: (514) 856-6928 F AX: (514) 856-6886 e-mail: info@ omega.
T ABLE OF CONTENTS 1. UNP ACKING THE FMA 4000 MASS FLOW METER ................................... 1.1 Inspect Package for External Damage................................................. 1.2 Unpack the Mass Flow Meter .................................
7. CALIBRA TION PROCEDURES ................................................................. 7.1 Flow Calibration............................................................................... 7.2 Gas Calibration of FMA 4000 Mass Flow Meter ..........
1 1. UNP ACKING THE FMA 4000 MASS FLOW METER 1.1 Inspect Package for External Damage Y our FMA 4000 Mass Flow Meter w as carefully packed in a sturdy cardboard car- ton, with anti-static cushioning materials to withstand shipping shock. Upon receipt, inspect the package f or possible e xter nal damage.
2 CAUTION: FMA 4000 TRANSDUCERS SHOULD NOT BE USED FOR MONITORING OXYGEN GAS UNLESS SPECIFICALL Y CLEANED AND PREP ARED FOR SUCH APPLICA TION. For more information, contact Omega 7 . Attitude limit of the Mass Flow Meter is ±15 F from calibration position (standard calibration is in horizontal position).
3 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 f or FMA 4000 t.
2.2.3 Communication Parameters and Connections The digital interf ace operates via RS485 (optional RS232) and provides access to applicable internal data including: flow , CPU temperature reading, aut.
5 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.
3. PRINCIPLE OF OPERA TION The stream of gas entering the Mass Flow transducer is split b y shunting a small por tion of the flow through a capillary stainless steel sensor tube.
7 4. SPECIFICA TIONS 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. CALIBRA TIONS: Per formed at standard conditions [14.7 psia (101.4 kPa) and 70 F F (21.
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.
9 5. OPERA TING INSTRUCTIONS 5.1 Preparation and W arm Up It is assumed that the Mass Flow Meter has been correctly installed and thor- oughly leak tested as described in section 2.
10 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 y et attained its minimum operating temperature .
11 5.3 FMA 4000 Parameters Settings 5.3.1 Engineering Units Settings The FMA 4000 Mass Flow Meter is capab le of displaying flo w rate with 23 diff erent Engineering Units.
5.3.2 Gas T able Settings The FMA 4000 Mass Flow Meter is capab le of storing calibration data for up to 10 diff erent gases. Digital interface commands are provided to: - get currently active Gas T able number and Gas name - set desired Gas T able . 5.
Mode Enable /Disable - Allows the user to Enable/Disab le Flow Alarm. Low Alarm - The value of the monitored Flo w in % F .S. below which is considered an alarm condition. Note: The value of the Lo w alarm must be less than the value of the High Alarm.
The current Flow Alarm settings and status are av ailable via digital interf ace (see paragr aph 8.3 ASCII Command Set “FMA 4000 SOFTW ARE INTERF ACE COM- MANDS”). 5.3.5 Relay Assignment Settings T wo sets of dr y contact rela y outputs are provided to actuate user supplied equip- ment.
15 The av ailable K F actor settings are: • Disabled (K = 1). • Inter nal Index The index [0-35] from internal K f actor table (see APPENDIX II). • User Defined User defined con version f actor. 5.3.7 Zero Calibration The FMA 4000 includes an auto zero function that, when activ ated, automatical- ly adjusts the mass flow sensor to read z ero.
16 Figure b-6: FMA 4000 Screen in the beginning of Auto Zero procedure. The A uto Zero procedure nor mally takes 1 - 2 min utes dur ing which time the DP Zero counts and the Sensor reading changes appro ximately ev er y 3 to 6 seconds. Figure b-7: FMA 4000 during the Auto Zero procedure.
17 5.3.8 Self Diagnostic Alarm FMA 4000 series Mass Flow Meters are equipped with a self-diagnostic alarm which is av ailable via m ulticolor LED , digital interface and on screen indication (f or de vices with optional LCD). The f ollowing diagnostic e vents are supported: 5.
18 Analog output signals of 0-5 Vdc and 4-20 mA are attained at the appropriate pins of the 15-pin “D” connector (see Figure b-1 ) on the side of the FMA 4000 transducer . Ta b l e V I Analog Output Jumper Configuration See APPENDIX IV f or actual jumpers lay out on the PCB.
19 6.2 Flow Path Cleaning Bef ore attempting any disassembly of the unit f or cleaning, try inspecting the flow paths by looking into the inlet and outlet ends of the meter f or any debris that ma y be clogging the flow through the meter . Remov e debris as necessar y .
20 7. CALIBRA TION PROCEDURES 7.1 Flow Calibration Omega ® Engineerings' Flow Calibration Laboratory offers prof essional calibration suppor t f or Mass Flow Meters using precision calibrators under strictly controlled conditions. NIST traceable calibr ations are av ailable.
21 7.2 Gas Flow Calibration of FMA 4000 Mass Flow Meter FMA 4000 Mass Flow Meters ma y be field recalibrated/chec ked f or the same range the y were originally factory calibrated for . When linearity adjustment is needed or flow range changes are being made , proceed to step 7.
22 Gas flow calibration par ameters are separately stored in the Gas Dependent por- tion of the EEPROM memory for each of 10 calibr ation tables. See APPENDIX I f or complete list of gas dependent variables .
If a simple communication terminal is used for communication with the FMA 4000, then “MW” (Memory Write) command from the software interface commands set ma y be used to adjust sensor value in the linearization table (see section 8.3 f or complete software interf ace commands list).
24 The FMA 4000 analog output calibration in volv es calculation and storing of the offset and span variab les in the EEPROM f or each av ailable output.
25 Enter Backdoor mode by typing: !11,MW ,1000,1[CR] Unit will respond with: !11,BackDoorEnabled: Y Disable DAC update by typing: !11,WRITE,4,D[CR] Unit will respond with: !11,DisableUpdate: D 7.3.2 Gas flow 0-5 Vdc analog output calibration 1. Install jumpers J7A, J7B and J7C on the PC board for 0-5 Vdc output (see T able VI).
26 Enable DAC update by typing: !11,WRITE,4,N[CR] Unit will respond with: !11,DisableUpdate: N Close BackDoor access by typing: !11,MW ,1000,0[CR] Unit will respond with: !11,BackDoorEnabled: N 8. RS485 / RS232 SOFTWARE INTERF ACE COMMANDS 8.1 General The standard FMA 4000 comes with an RS485 interf ace.
27 The global address can be used to change RS485 address for a particular device with unknown address: 1. Make sure only one device (which address must be changed) is connected to the RS485 network. 2. T ype the memory write command with global address: !00,MW ,7,XX[CR] where XX, the new hexadecimal address, can be [01 – FF].
28 8.3 ASCII Commands Set OMEGA FMA 4000 SOFTWARE INTERF ACE COMMANDS COMMAND NAME DESCRIPTION No. COMMAND SYNT AX Command Argument 1 Argument 2 Argument 3 Argument 4 Response Flow Requests the curren.
29 COMMAND NAME DESCRIPTION No. COMMAND SYNT AX Command Argument 1 Argument 2 Argument 3 Argument 4 Response Auto Zero Starts /reads the status of the auto zero feature (Note: The Z,N command can be used only when absolutely no flow thru the meter and no e a rl ie r then 6 minutes after power up.
30 COMMAND NAME DESCRIPTION No. COMMAND SYNT AX Command Argument 1 Argument 2 Argument 3 Argument 4 Response Relay Action Assigns action of the two SPDT relays.
31 COMMAND NAME DESCRIPTION No. COMMAND SYNT AX Command Argument 1 Argument 2 Argument 3 Argument 4 Response K Factors Applies a gas correction factor to the currently selected primary gas calibration table. (NOTE: does not work with % F .S. engineering unit.
32 COMMAND NAME DESCRIPTION No. COMMAND SYNT AX Command Argument 1 Argument 2 Argument 3 Argument 4 Response Units Set the units of measure for gas flow and totalizer reading.
33 UART Error Codes: 1 - Not Supported Command or Back Door is not enabled. 2 - Wrong # of Arguments. 3 - Address is Out of Range (MR or MW commands). 4 - Wrong # of the characters in the Argument. 5 - Attempt to Alter Write Protected Area in the EEPROM.
34 9. TROUBLESHOOTING 9.1 Common Conditions Y our FMA 4000 Digital Mass Flow Meter w as thoroughly checked at n umerous quality control points during and after manufacturing and assemb ly operations. It was calibrated according to y our desired flow and pressure conditions f or a given gas or a mixture of gases.
9.2 T roubleshooting Guide 35 NO . INDICA TION LIKEL Y REASON SOLUTION 1 No zero reading after 15 min. warm up time and no flow condition. Embedded temperature has been changed. Perform Auto Zero Procedure (see section 5.3.6 “Zero Calibration”). 2 Status LED indicator and LCD Display remains blank when unit is powered up.
36 NO . INDICA TION LIKEL Y REASON SOLUTION 8 Gas flows through the FMA 4000, but LCD Display reading and the output voltage 0-5 Vdc signal do not respond to flow . The gas flow is too low for particular model of FMA 4000. Check maximum flow range on transducer’ s front panel and make required flow adjustment.
9.3 T echnical Assistance OMEGA 7 Engineering will provide technical assistance ov er the phone to quali- fied repair personnel. Please call our Flow Depar tment at 800-872-9436 Ext. 2298. Please have y our Serial Number and Model Number ready when you call.
38 INDEX NAME DA T A TYPE NOTES 0 BlankEEPROM char[10] Do not modify . T able Revision [PROTECTED] 1 SerialNumber char[20] Serial Number [PROTECTED] 2 ModelNumber char[20] Model Number [PROTECTED] 3 SoftwareVer char[10] Firmware Version [PROTECTED] 4 TimeSinceCalHr float Time since last calibration in hours.
39 INDEX NAME DA T A TYPE NOTES 35 Klag [5] float DRC Lag Constant [Do Not Alter] 36 Kgain[0] float Gain for DRC Lag Constant [Do Not Alter] 37 Kgain[1] float Gain for DRC Lag Constant [Do Not Alter] .
40 INDEX NAME DA T A TYPE NOTES 100 GasIdentifer char[20] Name of Gas [If not calibrated = “Uncalibrated”] 101 FullScaleFlow float Full Scale Range in l/min 102 StdT emp float Standard T emperatur.
41 INDEX ACTUAL GAS K Factor Relative to N 2 Cp [Cal/g] DENSITY [g/I] 0 Acetylene C2H2 0.5829 .4036 1.162 1 Air 1.000 0.24 1.293 2 Allene (Propadiene) C3H4 0.4346 0.352 1.787 3 Ammonia NH 3 .7310 .492 .760 4 Argon Ar 1.4573 .1244 1.782 5 Arsine AsH3 0.
42 APPENDIX III GAS F ACTOR T ABLE (“K F ACTORS”) CAUTION : K-Factors at best are only an approximation. K factors should not be used in applications that require accuracy better than +/- 5 to 10%. ACTUAL GAS K F ACTOR Relative to N 2 Cp [Cal/g] Density [g/I] Acetylene C 2 H 2 .
43 ACTUAL GAS K FACTOR Relative to N 2 Cp [Cal/g] Density [g/I] Deuterium D 2 1.00 1.722 1.799 Diborane B 2 H 6 .4357 .508 1.235 Dibromodifluoromethane CBr 2 F 2 .1947 .15 9.362 Dichlorodifluoromethane (Freon-12) CCl 2 F 2 .3538 .1432 5.395 Dichlofluoromethane (Freon-21) CHCl 2 F .
44 ACTUAL GAS K FACTOR Relative to N 2 Cp [Cal/g] Density [g/I] Hydrogen Bromide HBr 1.000 .0861 3.610 Hydrogen Chloride HCl 1.000 .1912 1.627 Hydrogen Cyanide HCN .764 .3171 1.206 Hydrogen Fluoride HF .9998 .3479 .893 Hydrogen Iodide HI .9987 .0545 5.
45 ACTUAL GAS K FACTOR Relative to N 2 Cp [Cal/g] Density [g/I] Phosphorous Oxychloride POCl 3 .36 .1324 6.843 Phosphorous Pentafluoride PH 5 .3021 .1610 5.620 Phosphorous T richloride PCl 3 .30 .1250 6.127 Propane C 3 H 8 .35 .399 1.967 Propylene C 3 H 6 .
46 APPENDIX IV COMPONENT DIAGRAM TOP COMPONENT SIDE Aug. 09, 2007.
47 BOTTOM COMPONENT SIDE Aug 09, 2007.
APPENDIX V DIMENSIONAL DRA WINGS FMA 4000 WITHOUT READOUT 48.
FMA 4000 WITH READOUT OPTION 49.
W ARRANTY / DISCLAIMER OMEGA ENGINEERING, INC. warrants this unit to be free of def ects in materials and workmanship for a period of 13 months from date of purchase. OMEGA’ s W arranty adds an additional one (1) month grace period to the nor mal one (1) year pr oduct warranty to cover handling and shipping time .
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