Liquid Controls SP714 - Manual (Page 2)

Sponsler, Inc. SP714 Pulse Amplifier pg 2 DOC#” MN-714-B
SPECIFICATIONS
Temperature: Operating -40 to 85°C
Storage -65 to 125°C
Input Voltage: 6-28 VDC; 5 mA @ 24 VDC
Protected against polarity reversal
Signal Input: Frequency 0-10 KHz
Amplitude 20 mVp-p minimum sine or square wave
Sensitivity field adjustable
Impedance 10K @ 10KHz
Output: 6-28 VDC squarewave proportional to input voltage
Minimum load @ 250 ohms
Short circuit protection
Features: Individual LED indicators for power and output signal
Built in test oscillator that injects 4 Hz test signal when test P/B
depressed
Mounts directly on flowmeter
Enclosure: FM Approved, CSA Certified
Class I Groups B, C, D
Class II Groups E, F, G
Weight 1.7 lbs.
The SP714 is a meter-mounted device that amplifies and conditions low amplitude signals such
as those developed by a magnetic pickup coil. The amplitude of the squarewave output equals
the input supply voltage of the SP714. Signal amplification and conditioning permits trouble
free interfacing between low amplitude signal sources and electronic devices requiring pulse
inputs.
The sensitivity adjustment permits the SP714 to discriminate between an input signal and noise
by increasing (CCW) or decreasing (CW) the input signal amplitude necessary to be processed
as a valid signal. This, in conjunction with direct mounting, allows the SP714 to operate
effectively in noisy environments.
The SP714 contains a built in test oscillator that enables the operator to verify the amplifiers
operation without a signal source. The power LED illuminates when the input supply voltage is
present.