Omega DPF78 manual

www .omega.com e-mail: info@omega.com U ser ’ s Guide DPF75, DPF76 AND DPF78 SERIES Rate/T otalizer Shop online at M1090 /071603[...]

Servicing Nor th America: USA: One Omega Drive, P.O. 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 Servic[...]

T ABLE OF CONTENTS i QUICK SET-UP GUIDE ..................................................................................................... ii SPECIFICATIONS ............................................................................................................. 1 HOW TO MOUNT THE UNIT ........................................................[...]

QUICK SET -UP GUIDE 1) Determine what function the panel meter is to perform, e.g., rate display with alarm, batch control, totalizer, etc. 2) Ensure compatibility with sensor. The DPF70 panel meters require a pulse (or contact closure) input. The pulse must exceed 3 VDC and drop below 1 VDC. If necessary, as in the case of paddle wheel, turbine me[...]

COUNTER STEP 2: DPF75, DPF76: A,) Reset to zero "rST 0" will allow us to count up. "SET Pr" counts down from the preset value. B.) To read the total in whole gallons, set the decimal point to the far right. C.) Since you do not want to sum or take the difference of two inputs, choose "A SEP B" (DPF75 only). D.) The fre[...]

1 DESCRIPTION & SPECIFICA TIONS DESCRIPTION: The OMEGA DPF70 is a dual input (channel A and B) counter/ ratemeter, each with its own 5 digit dividing scale factor. The two 5 AMP preset relay outputs can be programmed by the user to apply to the "A" total counter, the "A" ratemeter, or the "B" counter or the net tot[...]

2 HOW TO MOUNT THE UNIT The unit is designed to be mounted with a gasket providing a water tight seal. Two mounting brackets are provided to secure the unit to the panel. A panel less than .1" may distort if the clamps are screwed too tightly. Slide the body of the unit through the rubber gasket. Insert the unit into the panel. As shown in &qu[...]

3 WIRING The rear terminal contains 12 screw terminals for connecting #14 to #28 gauge wire. The unit is controlled by a microprocessor and, therefore, an electrically "noisy" environment could cause operating problems. The input power line should not be common to power lines for motors, pumps, contactors, etc. The unit is designed to be [...]

4 CONNECTING AC / DC POWER NOTE: Connect power only after other connections are finished. Do not touch the live AC power terminals! The unit has been designed with an isolated AC input. Thus, polarity is not a concern for the AC input. The chassis is plastic, therefore earth ground is not used. For D.C. operation, connect + 12V to pin 7 and - D.C. [...]

5 WHA T CAN YOU VIEW? 1) "A sub B" - If you have selected the "A sub B" mode, pressing "view" shows: A) The net result of subtracting input B from input A. Pulses on input B will subtract (count down). Pulses on input A will add (count up) if "reset to 0" is selected, if "set to preset" is selected,[...]

6 PRGM FACToR RUN MODE DP F A ##### DP F B ##### ENTER ENTER ENTER ENTER ENTER PRGM Hi CPS Lo CPS PRGM RUN MODE ENTER RATE METER (MR2) ONLY CouNT ENTER RST 0 SET PR PRGM ENTER DPLoC ENTER A NET B A SEP B PRGM ENTER ENTER A AD D B A SuB B PRGM Hi CPS Lo CPS PRGM ENTER RUN MODE ENTER RATE ENTER SCALE R P S PRGM Z3600 Z60 PRGM ENTER ENTER ENTER RUN MO[...]

7 The following is a list of abbreviations as they appear on the display and front panel of the unit. ABBREVIATION DESCRIPTION SCALING FACTOR - For A and B Inputs. Each input has a separate 5 digit dividing scale factor. DECIMAL POINT FOR FACTOR A - Enter location of decimal point for scaling Factor A by pressing the button under the digit where th[...]

8 LOCK - This portion of the menu allows you to: 1) lock the program (presets are still accessible) 2) lock all (presets and program are locked). LOCK PROGRAM - This will lock the program and allow the presets to be changed when the unit is in the lock mode. LOCK ALL - This will lock the program and the presets when the unit is in the locked mode. [...]

9 CALCULA TING SCALE F ACT ORS There are two separate dividing scale factors, one for input "A" and one for input "B". The factor to enter is the number of pulses per the desired unit of measurement. The factor ranges from 0.0001 to 99999. The factor is the same for rate and count on input "A". Because the "units [...]

10 REMARKS This section of the menu is used to set up the scaling factors for inputs A & B. This sets the decimal for factor A. Press the arrow key under the digit where the decimal is desired. To clear the decimal, press the arrow key fur- thest to the right (PRGM) . This is the scaling factor for input A. To change, press the arrow key under [...]

11 PRESS DISPLAY REMARKS PRGM PRGM ENTER ENTER SETTING THE COUNTER STEP 2 DPF75 & DPF76 ONLY or or or or ENTER ENTER ENTER This section of the menu sets up the counter information. Press the PRGM key to choose RST 0 (reset to 0, count up) or SET PR (set to preset, count down), press the ENTER key to enter the displayed choice. This sets the dec[...]

12 ENTER STEP 3 REMARKS PRESS DISPLAY This section of the menu is used to set up the rate information. Press the PRGM key to choose RPS (rate per second) or SCALE (RPM, RPH). Press ENTER to enter displayed choice. Press PRGM to choose ÷ 60 (RPM) or ÷ 3600 (RPH). Press ENTER to enter displayed choice. This sets the normalizing (averaging) factor. [...]

13 DISPLAY REMARKS or Flashes followed by: Flashes followed by: or PRGM PRGM PRGM PRGM This section of the menu is used to set up the lockout type and code. LC PG = Locks program but presets and reset are accessible. LC ALL= Locks entire keypad. Press the PRGM button to toggle between choices; Press ENTER to enter displayed choice. After CODE flash[...]

14 REMARKS DISPLAY PRESS PRGM PRGM PRGM PRGM PRGM STEP 5 SETTING THE RELAYS ENTER This section sets up the relay information. Press the PRGM key to choose A TOT (A assigned to total) or A RATE (A assigned to rate). Press ENTER when the desired choice is displayed. This is the duration (.1 to 99.9 sec) that relay A will remain energized. If 00.0 is [...]

15 OUTPUT WIRING The following diagrams detail the connection of the relay and analog output options. Each relay consist of a form A contact (Normally Open). NPN transistor or Normally Closed contacts are available with solder jumpers (see Jumper Options). SOLENOID (Single Stage) Use Relay A (pins 1 & 2) for single stage preset. When the count [...]

16 ANALOG OUTPUT OPTION Description: An optional 4-20mA (0-20mA) output has been added to the DPF70 series. The output can be programmed to track rate or total. This feature is available by adding suffix A to the part number. Connec- tions are via a 2 terminal pluggable screw connector. Connections: (see FIG. 1) PIN13 supplies the 12 to 18 VDC to p[...]

17 INTERF ACE CARD RS 232/422 OPERA TION RS 232/422 SET-UP: All serial communication mode changes must be done through serial communications. Mode changes cannot be done through the front panel. To initialize the unit, place a jumper between pin 7(+12V )[bottom board] and pin 1(init) [DB -9 connector] on initial power up. The unit defaults to: 300 [...]

18 SERIAL INPUT COMMANDS: To get a unit on line you must address it by its device number. This is done by typing DXX(S), XX= device number. The unit comes on line and echoes back DEVICE# XX. Insure that "DEVICE# XX:" is received before requests are sent. The unit is now ready to receive a command or string of commands separated by a space[...]

19 COMPUTER HOOKUP: RS 232: When connecting the unit to a computer with RS 232 communication, only three connections are needed. These connections are: Receive data, Transmit data and Ground. The connections should be made as follows: DP -9 CONNECTOR COMPUTER Transmit data (pin 2) Receive data Receive data (pin 3) Transmit data Ground (pin 5) Groun[...]

20 PROBLEM SOLUTIONS POSSIBLE CAUSES TROUBLESHOOTING GUIDE Power is applied to unit but the display does not light. Unit works, but occasionally the display freezes or skips counts. Input signal is connected but the unit does not count or display rate. Rate is displaying: r FFFFF. Relays are not activating properly. Counter resets before reaching 9[...]

21 NOTES[...]

22 NOTES[...]

23 NOTES[...]

W ARRANTY / DISCLAIMER OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a period of 13 months from date of purchase. OM EGA ’ s W ARRANTY adds an additional one (1) month grace period to the normal one (1) year product warranty to cover handling and shipping time. This ensures that OMEGA ’ s cust[...]

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