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User’s Guide
Shop online at
www.omega.com
e-mail: info@omega.com
DPF75, DPF76
AND DPF78 SERIES
Rate/Totalizer
M1090 /071603
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® OMEGAnet Online Service Internet e-mail www.omega.com info@omega.com Servicing North 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 Service: 1-800-826-6342 / 1-800-TC-OMEGA ® Customer Service: 1-800-622-2378 / 1-800-
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TABLE OF CONTENTS QUICK SET-UP GUIDE ..................................................................................................... ii SPECIFICATIONS .............................................................................................................1 HOW TO MOUNT THE UNIT.............................................................................................2 WIRING .............................................................................................................
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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 meter or other types of inductive pick-up sensors, a signal conditioner or pulse amplifier (such as FLSC-AMP) can be used. 3) The wiring is explained
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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 frequency will exceed 40 Hz, so you will need to select "HI CPS". "LO CPS" provides debounce filtering for contact closures. RATE STEP 3: DPF75, DPF78 A.) Select "SCALE" to engage
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DESCRIPTION & SPECIFICATIONS DESCRIPTION: Analog Output: The OMEGA DPF70 is a dual input (channel A and B) counter/ An optional 4-20mA (0-20mA) output is available for ratemeter, each with its own 5 digit dividing scale factor. The two 5 the DPF70 series. The output can be programmed AMP preset relay outputs can be programmed by the user to apply to track rate or total. This feature is available by to the "A" total counter, the "A" ratemeter, or the "B" counter or the adding suffix A to t
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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 "FIG. A", slide the brackets up the groove to press against the back of the panel. Insert screws into rear of brackets and tighten them evenly and alternat
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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 immune from line or RF voltage interference. In some environments voltage spikes of over 100 volts, even 1000 volts, can occur. When common to a power line dri
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ANALOG ANALOG ANALOG OUTPUT OUTPUT OUTPUT ON ON ON RELAYS RELAYS RELAYS SWITCH A B SWITCH A B SWITCH A B 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. to pin 8. WIRING CONSIDERATIONS Connecting
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WHAT 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, input A will subtract (count down). B) The rate of input A. 2) "A add B" - If you have selected "A add B" mode, pressing "view" shows: A) The net result of adding "A" and "B" inputs. Pulses on inpu
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OPERATING THE FRONT PANEL RST A B C D E ENTER LOCK PRE A PRE B VIEW PRGM Press to ENTER in Press to "enter" Press to view or Press to view or Press to alternately Press to cycle the programming LOCK code to change Preset A change Preset B view A Rate& Net through mode. LOCK and Total or A Rate, A PROGRAM Press to RESET UNLOCK front Total & B Total. choices; displayed total in panel. Press to step operating mode. through set up choices in pro- gram mode. Use keys A, B, C, D, & E to advance d
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PROGRAM CODES AND DESCRIPTIONS 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. DP F A DECIMAL POINT FOR FACTOR A - Enter location of decimal point for scaling Factor A by pressing the button under the digit where the decimal is desired. DECIMAL POINT FOR FACTOR B - Enter location of decimal point for scaling Factor B by pressi
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ANALOG OUTPUT ON RELAYS SWITCH A B 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). LC PRG LOCK PROGRAM - This will lock the program and allow the presets to be changed when the unit is in the lock mode. LC ALL LOCK ALL - This will lock the program and the presets when the unit is in the locked mode. The presets can be viewed, but not changed. LOCK CODE - This message (code) will flash on display for
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CALCULATING SCALE FACTORS 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 per second", "minute", or "hour" are field programmable from the keypad, scale factor calculations for the ratemeter are easy. Here are some examples: SCALING FACTOR EXAMPLES: BATCHIN
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PROGRAMMING REMARKS PRESS DISPLAY STEP This section of the menu is used to set 1 up the scaling factors for inputs A & B. factor SETTING PRGM SCALING This sets the decimal for factor A. FACTORS Press the arrow key under the digit where the decimal is desired. To clear ENTER 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 the ##### digit(s) to change. Press ENTER to ENTER enter the displayed value. Thi
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PRESS DISPLAY REMARKS factor PRGM STEP This section of the menu sets up the counter 2 information. PRGM count SETTING THE Press the PRGM key to choose RST 0 (reset rst 0 COUNTER to 0, count up) or SET PR (set to preset, count or ENTER down), press the ENTER key to enter the DPF75 displayed choice. & DPF76 This sets the decimal location for the A & B ONLY counters. Press the arrow key under the desired digit location. To clear the decimal, ENTER press the arrow key furthest to the right. Press
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PRESS DISPLAY REMARKS STEP factor 3 PRGM SETTING count THE RATE PRGM rate This section of the menu is used to set up the DPF75 PRGM rate information. & DPF78 rps Press the PRGM key to choose RPS (rate per ONLY or second) or SCALE (RPM, RPH). Press ENTER scale to enter displayed choice. ENTER Press PRGM to choose ÷60 (RPM) or ÷3600 or (RPH). Press ENTER to enter displayed choice. ENTER This sets the normalizing (averaging) factor. nor ## Press the arrow keys under the desired digits to change. Pr
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PRESS DISPLAY REMARKS factor STEP PRGM 4 count SETTING PRGM LOCK rate PRGM This section of the menu is used to set up the PRGM lockout type and code. LC PG = Locks program but presets and reset are accessible. LC ALL= Locks entire keypad. or Press the PRGM button to toggle between LC ALL ENTER choices; Press ENTER to enter displayed choice. After CODE flashes the display will show the existing lock code. To change the code press Flashes the key under each digit to be changed. Press followed b
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PRESS DISPLAY REMARKS factor PRGM count PRGM STEP 5 rate PRGM SETTING THE PRGM RELAYS relay This section sets up the relay information. PRGM Press the PRGM key to choose A TOT (A This step will only or assigned to total) or A RATE (A assigned to appear on DPF75 ENTER rate). Press ENTER when the desired choice is displayed. This is the duration (.1 to 99.9 sec) that relay A ##.# A will remain energized. If 00.0 is selected, ENTER the relay will latch until reset. Press the PRGM key to choose B
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ANALOG ANALOG OUTPUT ANALOG OUTPUT OUTPUT ON RELAYS ON ON A B SWITCH RELAYS RELAYS SWITCH A B SWITCH A B 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 or rate (selectable) reaches Preset A, Relay A wi
