Bulletin F-DPW Series DPW Digital Paddle Wheel Flow Meter Specifications - Installation and Operating Instructions DWYER INSTRUMENTS, INC. P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Phone: 219/879-8000 Fax: 219/872-9057 www.dwyer-inst.com e-mail: info@dwyer-inst.
4.7 Submenu Pilot Totalizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13 4.7.1 Pilot Totalizer Mode Tabular Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . .13 4.7.2 Pilot Totalizer Flow Start Numerical Entry . . . . . . . . . . . . . . . . . . . . . .13 4.7.3 Pilot Totalizer Event Volume Numerical Entry . . . . . . . . . . . . . . . . . . .13 4.7.4 Pilot Totalizer Reset Tabular Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . .13 4.
1. UNPACKING THE DPW 1.1 - Inspect Package for External Damage Your DPW Digital Paddle Wheel was carefully packed in a sturdy cardboard carton, with antistatic 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 DPW meter Open the carton carefully from the top and inspect for any sign of concealed shipping damage.
To eliminate the possibility of noise interference, use a separate cable entry for the DC power and analog signal lines (pins L, M, K on “M16” connector). Pin E ------------ RS-485 T(+) or R(+) Pin D ------------ RS-485 T(-) or R(-) 2.2.3 Flow Sensor Pulse Output Signals Connections Pin B ------------ RS-485 GND (if available) RS-232 communication interface connection: Crossover connection has to be established: Pin C -------- (+) Flow Sensor Pulse Output (active), 3.
Action: 3.LCD KEYPAD OPERATION: DATA ENTRY AND CONFIGURATION (applicable for LCD options only) 3.1 - Display Indications Keypad UP i 5.001 Gl/min AD 20.1 C *******Gal Initially, after the power is first turned on, the flow meter model number is shown in the first line of the display and the revisions for EPROM table and firmware in the second line. Subsequently the actual process information is displayed.
3.2 Menu Sequence The listing below gives a general overview of the standard top-level display menu sequence when running firmware version A002. The ESC pushbutton is used to toggle between the process mode (PI screens) and the menu. 3.1.2 - DPW without RTD option Process Information Screens Pressing UP and DN buttons from initial PI screen will switch display as following: [Initial PI screen] Action: Keypad UP The listing in Section 3.
3.3 Parameter Summary and Data Entry Low Flow Alarm 10.0% FS Low Flow Alarm 90.0% FS MT Flow Start 5.
LCD Back Light 70% FS LCD Back Light 70% FS PT Flow Start 10.0% FS Low Flow Cut-Off 1.
4.2.2 - Communication Interface This display indicates type of the digital communication interface (RS-232 or RS485) and device address (two hexadecimal characters of the address will be displayed only for RS-485 interface option). All flow meters are shipped from the factory with default address 11. A typical display for device with RS-485 option is shown below. 4. PARAMETER ENTRY There are two methods of data entry: • Direct numerical number entry • Tabular Input from a table menu.
Units of Measure 4.2.8 - Flow Meter Serial Number This display indicates the serial number of the flow meter. This number is generated by the factory and is unique to the instrument. The flow meter serial number is not user-changeable. A typical display with flow meter serial number is shown below.
A typical display with flow meter High Flow Alarm settings is shown below. 4.3.1.c - User Defined Unit Density Support Tabular entry This function determines whether the newly entered user defined engineering unit is a mass unit (with density) or a volumetric unit (without density). The following selections are available: Enabled or Disabled. The default entry is Disabled. High Flow Alarm 90.
4.5.2 - Low Temperature Alarm Numerical Entry The limit of required Low Temperature Alarm value can be entered in increments of 0.1°C from -9.9 °C to 99.9°C. By default, flow alarm is non-latching. That means the alarm is indicated only while the monitored Temperature value exceeds the specified set conditions. If optically isolated output is assigned to the Temperature Alarm event, in some cases, the Temperature Alarm Latch feature may be desirable.
4.7.4 - Pilot Totalizer Reset Tabular Entry The Pilot Totalizers reading can be reset by pressing ENTER button. A typical display with flow meter Pilot Totalizer Reset screen is shown below. 4.6.4 - Main Totalizer Reset Tabular Entry The Main Totalizers reading can be reset by pressing ENTER button. A typical display with flow meter Main Totalizer Reset screen is shown below. Reset Pilot Total Value? Reset Main Total Value? The next confirmation screen will appear only for 2 seconds.
4.9.6 - Submenu Noise Reduction Filter Sample Number Numerical Entry This is the second parameter that makes up noise reduction filter algorithm. The sample number value can be selected between 1 and 32. The number of samples value represents the number of previous individual inputs used to calculate the average value. Eventually the number of samples in the running average also affects the response time. The more samples are used, the more inertial flow output reading will be to the actual flow change.
4.11.2 - Submenu Alarm Events List This menu selection provides list of the descriptions and corresponding code for all supported events. 4.11 - Submenu Alarm Events Log DPW series Flow Meters are equipped with a self-diagnostic alarm event log which is available via digital interface and on screen LCD indication (for devices with optional LCD). A typical display with Alarm Events Log selection is shown below.
Note: It is recommended to use the Dwyer Instruments, Inc. supplied calibration and maintenance software for analog output calibration. This software includes an automated calibration procedure which may radically simplify calculation of the offsets and spans variables and, the reading and writing for the EEPROM table. 4.12.4 - Submenu DAC_A Flow Output This menu selection provides current value of the DAC register for analog flow output circuitry.
6.2 - Flow Meter Span Calibration Note: Your DPW Flow Meter was calibrated at the factory for the specified fluid and full scale flow range (see device’s front label). There is no need to adjust the Calibration Factor or Flow linearization table unless linearity adjustment is needed, flow range has to be changed. Any alteration of the Calibration Factor or flow linearization table will VOID calibration warranty supplied with instrument. 5.2.4 - Temperature 0 to 5 VDc Analog Output Calibration* 1.
Several examples of commands for RS-485 option follow. All assume that the DPW meter has been configured for address 18 (12 hex) on the RS485 bus: 7. RS-485/RS-232 SOFTWARE INTERFACE COMMANDS 7.1 - General The standard DPW comes with an RS-485 interface. For the optional RS-232 interface, the start character (!) and two hexadecimal characters for the address must be omitted. The protocol described below allows for communications with the unit using either a custom software program or a “dumb terminal.
Command No. Name Description 6 Flow Alarms Sets / reads the status of the flow alarms. Note: High and Low limits have to be entered in the % FS. High alarm value has to be more than Low alarm value.
Command Name Pilot Totalizer Description Sets and controls action of the Pilot flow totalizer. NOTE: Pilot Totalizer reading is stored in SRAM (volatile) memory. Power cycle will reset Pilot Totalizer reading to zero. No. 10 Display /Change Meter Low Flow Cut Off settings in % FS. 11 Fluid Density Display /Change Meter Low Flow Cut Off settings in % FS. 12 Low Flow Cut Off Units Set the units of measure for gas flow and totalizer reading.
Command Name Flow Meter Linearizer Description Enable/disable flow meter linearizer No. 17 LCD Back Light** 18 Display/change LCD back light settings Note: LCD back light settings has to be in the range: )% ≤ BL ≤ 80% Noise Reduction Filter Noise Reduction Filter parameter settings. Following arguments supported: T - Running Average Time Interval (0-99 seconds) N -Running Average Number of samples (1-32) Reads the value in the specified memory location.
8. Troubleshooting 8.1 - Common Conditions Your DPW Flow Meter was thoroughly checked at numerous quality control points during and after manufacturing and assembly operations. It was calibrated according to your desired flow and pressure conditions for a given fluid. It was carefully packed to prevent damage during shipment.
APPENDIX I Dwyer® DPW Flow Meter EEPROM Variables Rev:A002 [10/01/2009] Note: indexes 0-19 are write protected (manufacture and calibration specific data) No.
Data Type Notes float Flow Linearizer Index 6 PFS [0.0 – 1.0] uint Flow Linearizer Index 6 Counts float Flow Linearizer Index 7 PFS [0.0 – 1.0] uint Flow Linearizer Index 7 Counts float Flow Linearizer Index 8 PFS [0.0 – 1.0] uint Flow Linearizer Index 8 Counts float Flow Linearizer Index 9 PFS [0.0 – 1.0] uint Flow Linearizer Index 9 Counts float Flow Linearizer Index 10 PFS [0.0 – 1.
APPENDIX III 2-1/16 [52.37] 4-1/2 [114.30] 15/32 [11.99] 1-19/32 [40.39] 2 [50.80] DPW FLOW DIGITAL LIQUID FLOW METER 4-13/32 [111.76] PADDLEWHEEL BEHIND ACRYLIC, O-RING SEALED, COVER Dimensional Drawing APPENDIX IV CAUTION This product is not intended to be used in life support applications! TRADEMARKS Dwyer® is a registered trademark of Dwyer Instruments, Inc.. Buna® is a registered trademark of DuPont Dow Elastometers. Kalrez® is a registered trademark of DuPont Dow Elastomers.
©Copyright 2013 Dwyer Instruments, Inc. Page 26 Printed in U.S.A. 5/13 DWYER INSTRUMENTS, INC. P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Phone: 219/879-8000 Fax: 219/872-9057 FR# RA-444053-00 www.dwyer-inst.com e-mail: info@dwyer-inst.
