Omega’s new DPF20 Series of indicators offer real flexibility for measurement of a wide range of frequency or pulse inputs. The display is easily configured to indicate frequency, rate, period or count. This makes the meter ideal for flow applications where they can display flow rate or total from a variety of different flow sensors. Or for quadrature signals, to indicate angular position or rotational speed and direction.
The DPF20 series offers exceptional performance at an economical price, with some unique and powerful features.
Multiply, divide and preset values
configure a second setpoint in the same alarm, to create “alarm windows”
configure independent activation and deactivation delays
configure alarm to activate as high or low
failsafe function – normally closed relay requires activation for non-alarm condition
latched alarms function – operator reset required
Counter Reset, Stop or Continue
Power up delay
Allows for a delay in the start-up timeafter powering the instrument. During this time the instrument performs no measurement or control. Ability to reset the display count on instrument start-up.
Select from 5 levels of LED intensity.
Password protect the configuration menu. This blocks access to the instrument set-up parameters, but the operator can still access set-point values.
Max / min memory
Front panel key selection of display minimum or maximum values
The fast and simple way to configure a sensor. Select from a predefined list Eg. NPN, PNP, Namur, pick-up, inductive, etc. The instrument will automatically configure the required parameters for the selected sensor (pull-up / pull-down resistors, trigger level, excitation voltage, etc)
Simple selection of the optimal trigger level for the sensor input. The display indicates up or down reflecting the status of the input signal level. When the LED changes state continuously the optimal trigger level has been achieved.
Specifications Main Functions: Counter, ratemeter, period meter Display Digits: 6 Display Range: 999999/-199999 Decimal Point: Configurable LED Color: Red standard; green optional Digit Height: 14 mm (0.55") Signals Accepted: NPN, PNP, Namur, pick-up, TTL, inductive, mechanical, quadrature Excitation Voltage: 5 Vdc, 9 Vdc, 15 Vdc, 18 Vdc (max. 70 mA) Maximum Vdc at Input Terminals: ±30 Vdc Input Impedance: 2.4 kO with pull-up or pull-down resistor; 470 k without resistor Quartz Accuracy: ±0.01% Thermal Stability: 20 ppm/ºC Display Refresh: 15/second Maximum Frequencies: Counter: Up to 250 KHz Ratemeter and Period Meter: Up to 500 KHz Minimum Frequencies: Down to 1 mHz (0.001 Hz) (ratemeter and period meter) Standard Power: 85 to 265 Vac/DC (isolated 2,500 Vac) Low Power: 11 to 60 Vdc and 24/48 Vac (isolated 1500 Vac) Power Consumption: <1.5 W (meter only); < 4.0 W (meter with options) Connections: Plug-in screw terminal Slow Function: For low frequency rate meter applications Fast Function: For high frequency counter applications Scaling Factor: Multiplier and divider from 1 to 999999 Configurable Reset: Front panel and rear remote reset, and reset linked to alarm activation Preset: Configurable Retention Memory: Recovers count value in case of power loss Dimensions and Environment Weight: <150 grams (<5.3 oz) Front Panel Size: 96 x 48 mm (3.78 x 1.89") Panel Cut-Out: 92 x 44 mm (3.62 x 1.73") Depth Behind Panel: 91 mm (3.58") including terminals Operating Temperature: 0 to 50ºC (32 to 122ºF) Storage Temperature: -20 to 70ºC (-4 to 158ºF) Warm Up: 15 minutes Front Panel Protection: NEMA 4 (IP65)