The DPF80 series (Dual Rate Totalizer) is a 5 digit Ratemeter, 6 digit Totalizer in a 1 /8 DIN package. The DPF80 Series is the ideal solution for many flow meter applications. Omega offers many different types of flowmeters: paddlewheels, turbines, positivie displacement, annemometers, mass flow, etc. for many application solutions.
User selects 1 of 6 displays to show A, B or C rate and A, B or C total. Inputs A and B have separate scaling to read in engineering units. A 4-20mA (0-20mA) output of the C rate or total is optional. The user can press the VIEW button to see 6 separate items, total A, total B, total C, rate A, rate B, rate C. Negative values are displayed with a negative symbol (-12345). For the C value, the user can choose from the following combination of A&B inputs: TOTAL with a choice of A+B or A-B, RATIO with choice of A ÷ B (x100) to show percent of A to B quantity or A ÷ [A + B (x100)] to show percent of A to total quantity. Two independent presets are standard. User selects whether output A is activated by total or rate value of input B or selected C. Outputs activated by A or B total can be set to latch or auto recycle with an adjustable output duration from 00.1 to 99.9 sec. For rate, ratio, or C total, outputs pull in when value (equal or above the preset and drop out when value) is below the preset minus the selected 0 to 99.9 hysteresis.
The DPF80 series has two separate K-Factors that are used to convert the input pulses to engineering units. The 5 digit K-Factor dividers, with decimal keyed into any position, allow easy direct entry of any K-Factor from 0.0001 to 99999. Separate factors may be entered for the 2 separate input channels. .
2 each N.O. Relay 10 Amps 120/240 Vac or 28 Vdc. (N.C. relay contacts and NPN transistor output available with solder jumpers. Transistor output is internally pulled up to 10 Vdc through relay coil, sinks from 10 Vdc to 0.5V @100mA)
An optional 4-20 mA (0-20mA) output is available. The output can be programmed to track rate or total of the C display. This feature is available by adding suffix A to the part number. Connections are via a 2 terminalpluggable screw connector. Programming is accomplished by using the front panel in conjunction with rear dip switches.
50 µA worst case
3 to 30 Vdc non inductive
Two control outputs are provided. To set relay values, press “menu” button until “Relay” appears on the display, the A and B outputs can be assigned to the A, B or C displays. A 5 digit value can be entered for both presets and the decimal point location is the same as the counter. the outputs can be set to energize from 0.1 to 99.9 seconds or latch (0.0). If a value other than 0.0 is entered, the counters will auto reset at the preset (for A& B counters).
Unauthorized front panel changes can be prevented by entering a user selected 5 digit code. The front panel can be completely locked out or the presets can remain accessible.
Accurate to 41 /2 digits (±1 display digit). The ratemeter uses 1/tau with 8 digit math, can sample from 2 to 24 seconds maximum, and auto-range up to 5 digits of significant information. In the "RPS" mode, the ratemeter displays in units per second, and in the "scale" mode, units per hour or per minute. The unit will display the rate of the A&B Inputs.
The two 6-digit counters can count at 10 KHz speed. Each has a separate 5-digit dividing scale factor. The counters advance on the positive edge of each pulse. Besides being able to step through the total and rate values of A & B inputs, the user can see a selected combination of total and rate of A+B, A-B, A÷B x 100 (percent of A to B), A ÷ (A+B) x 100 (percent of A to Total). A negative display will be viewed as a 5 digit display with a negative symbol (-12345).
Display: 5-digit, 14 mm (0.55") high LED
110 Vac ±15% or 12 to 15 Vdc
220 Vac ±15% or 12 to 15 Vdc (optional)
24 Vac ±15% or 12 to 15 Vdc (optional)
Current: 250 mA dc max or 6.5 VA ac
Output Power: (AC-powered units only) + 12 Vdc @ 50 mA, unregulated - 0 + 50%
Operating: 0 to 54°C (32 to 130°F)
Storage: -40 to 93°C (-40 to 200°F)
Humidity: 0 to 90%, non-condensing
Memory: EEPROM stores data for 10 years if power is lost
DPF82: High-impedance DC pulse input 4 to 30 Vdc (high), open or 0 to 1 Vdc (low),10 kΩ impedance, 10 kHz max speed accepts simultaneous inputs
DPF83: Mag. input, input A only, accepts 30 mV input (50V max P/P), signals 10 kΩ impedance, 5 kHz max, (input B, 4 to 30V)
DPF84: Mag. input, inputs A and B, accepts 30 mV input (50V max P/P) signals 10 kΩ impedance 5 kHz max Reset
Front Panel: Reset displayed value and control output
Remote: 4 to 30 Vdc negative edge resets all counters, "A" counter or "B" counter (user selectable)