Precision Digital PD941 - Manual (Page 8)

ConsoliDator Multi-Channel Controller Instruction Manual
8
4-20 mA Analog Inputs
INPUT 4-20 mA; minimum span of 1 mA
ACCURACY ±0.03% of span 1 count
TEMPERATURE DRIFT 50 PPM/ C from 0 to 50°C ambient
INPUT FUNCTION Linear, Square Root, Programmable Exponent, Multi-Point
(up to 32), or Fixed Value
MATH FUNCTION Sum or difference of 2 or more channels.
TOTALIZER Calculates total based on rate and time base of second,
minute, hour, or day; stored in non-volatile memory every 5
minutes; supports linear inputs only.
TOTALIZER RESET Via front panel buttons (password restricted)
DECIMAL POINT User selectable zero to six places with automatic overflow.
INPUT RANGE 4-20 mA, Minimum span of 1 mA
INPUT IMPEDANCE 130 
NORMAL MODE
REJECTION Greater than 100 dB at 50/60 Hz.
TRANSMITTER POWER
SUPPLY Each input is equipped with +24 VDC current limited to
40 mA. External supply may be substituted.
ENGINEERING UNITS User selectable units or custom-entered units.
Flow Meter Pulse Inputs
ACCURACY ±1 count for K-Factor > 1
SIGNAL RANGE 100 mVp-p to 15 Vp-p; 1 Hz to 10 kHz
K-FACTOR Programmable from 0.00001 to 999999 pulses/unit
DISPLAY OPTIONS Rate and total values displayed on screen.
Bargraphs user selectable to indicate either total or rate.
ENGINEERING UNITS Show Total/Rate combinations:
GAL & GPS, GAL & GPM, GAL & GPH, GAL & GPD, MG &
MGD, BBL & BPH, BBL & BPD, LTR & LPs, LTR & LPM,
LTR & LPH, LTR & LPD, CF & CFS, CF & CFM, CF &
CFH, CF & CFD, MCF & MCD.
RATE & TOTAL
DECIMAL POINT Independent and user selectable from zero to six places
with automatic overflow.
TOTALIZER Calculates total based on rate. Reading stored in non-
volatile memory every 5 minutes for power-loss recovery.
TOTALIZER RESET Via front panel buttons (Password restricted)
Digital Inputs
INPUT TYPES Normally open switch: External excitation not required.
Open collector transistor: Open circuit voltage = 3 VDC
Closed Circuit Current = 18.5 mA
Switch closure or logic LO to terminals interpreted as "ON"
LO = 0 to 1 VDC, HI = 2.5 to 12 VDC
INPUT IMPEDANCE 240 
SIGNAL REQUIREMENTS Minimum input pulse (closed contact or LO) duration: 1 sec
Maximum input pulse frequency: 30 cycles per minute