Instruction/ maintenance manual of the product DPF75 Omega
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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.
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T ABLE OF CONTENTS i QUICK SET-UP GUIDE ..................................................................................................... ii SPECIFICATIONS ...........................................................................................
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.
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).
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.
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.
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.
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.
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.
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 SE.
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.
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.
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.
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) .
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.
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).
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.
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.
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).
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.
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.
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.
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.
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.
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.
Where Do I Find Ever ything I Need for Pr ocess Measurement and Control? OM EGA…Of Course! Shop online at www .omega.com TEMPERA TURE 䡺 ⻬ Thermocouple, RTD & Thermistor Probes, Connectors, P.
An important point after buying a device Omega DPF75 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Omega DPF75 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Omega DPF75 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Omega DPF75 you will learn all the available features of the product, as well as information on its operation. The information that you get Omega DPF75 will certainly help you make a decision on the purchase.
If you already are a holder of Omega DPF75, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Omega DPF75.
However, one of the most important roles played by the user manual is to help in solving problems with Omega DPF75. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Omega DPF75 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
