The DPF6000 series 6 digit, 1/8 DIN panel instrument can be configured as a frequency meter/tachometer, frequency-ratio meter, period/period-average meter, time-interval/time-interval-average meter, reset stopwatch, and cumulative timer or totaliser/2-stage batch controller. However, the DPF6000 display cannot toggle between rate and total.Two frequency inputs can be used to provide frequency ratio or time-interval measurements only; no other function of the meter can be performed on two inputs.
Maximum frequency input is up to 7 MHz. The display capacity is -99,999 to 999,999 counts, with exponential format up to 9.99 9. Upon ac power loss, the latest reading is automatically saved in non-volatile RAM and is restored upon return of power.
The standard input of the DPF6100 is for two non-isolated TTL/CMOS-level signals with protection to 25 Vdc for use with amplified flowmeter inputs.
The DPF6200 provides a 20 Vdc output at up to 16 mA for direct connection to NPN or PNP open-collector or NAMUR sensors.
A universal signal conditioner board in the DPF6300 and DPF6400 provides sensor excitation plus low level ac signal amplification, coupling, signal isolation to 350 Vp, and jumper-selectable low-pass filtering, debounce time, and hysteresis. AC sensitivity is +10 mV below 1 kHz. The DPF6300 and DPF6400 can be tied directly to low-level passive magnetic pickups (such as turbine and paddlewheel flow sensors), line voltages up to 240 V rms, and NPN, PNP, NAMUR, or contact-closure sensors. The DPF6300 provides signal conditioning on one channel, while the second channel accepts TTL/CMOS input. The DPF6400 provides signal conditioning on both channels.
The DPF6500 accepts 4-20 mA, 0-10, 0-5, or 0-2 Vdc analogue inputs for totalisation/batch control or rate indication with alarms.
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