Precision Digital PD6830 - Manual (Page 10)

PD6830 Pulse Input Rate/Totalizer Instruction Manual
10
OPTO-ISOLATED IN-
PUT
Sourcing pulse or square wave 0-5 V, 0-12 V, or 0-24 V;
Logic High: 2-24 V, Logic Low: < 1 V
Maximum Frequency: 20 kHz
Minimum Pulse Width: 20 µs
Input Current: 1 mA @ 5 V, 2.5 mA @ 12 V, 5 mA @ 24 V
LOW VOLTAGE
MAG PICKUP INPUT
Sensitivity: 20 mVp-p to 24 Vp-p
Maximum Frequency: 6 kHz
MINIMUM INPUT
FREQUENCY 0.0001 Hz. Minimum frequency is dependent on high gate
setting (rate display).
INPUT
IMPEDANCE Pulse input: Greater than 75 k  @ 1 kHz.
Open collector/switch input: 100 k  pull-up to 3 V.
ACCURACY
±0.03% of calibrated span ±1 count
TEMPERATURE
DRIFT
Rate display is not affected by changes in temperature.
LOW-FLOW CUTOFF
0-99,999 (0 disables cutoff function)
DECIMAL POINT
Up to four decimal places or none:
4.4444
, 33.333, 222.22, 1111.1,
or
00000
CALIBRATION
May be calibrated using K-Factor, scale without signal
source, or by applying an external calibration signal.
K-FACTOR
Field programmable K-Factor converts input pulses to rate in
engineering units. May be programmed from 0.000001 to
9,999,999 pulses/unit.
CALIBRATION
RANGE
Input 1 signal must be ≥ 1 Hz; input 2 signal may be set any-
where above input 1 setting. Minimum input span is 1 Hz.
An Error message will appear if the input 1 and input 2 sig-
nals are too close together.
INPUT CONTACT
DEBOUNCE FILTER
Programmable contact debounce filter. Input signal frequency
speed selections of Hi (no filter), Med (250 Hz max input, 2
ms pulse width), and Low (100 Hz max input, 5 ms minimum
pulse width).
TIME BASE
Second, minute, hour, or day
GATE
Low gate: 1-99 seconds; High gate: 2-9,999 seconds