Liquid Controls SP717 - Manual (Page 2)

Sponsler, Inc. SP717 Modulated Carrier Amplifier pg 2 DOC#” MN-717-A
SPECIFICATIONS
Temperature: Operating -40 to 85°C
Storage -65 to 125°C
Input Voltage: 6-28 VDC; 100mA max.
Protected against polarity reversal
Signal Input: Frequency 0-3500 Hz with 50 KHz carrier
(requires Pickup Coil 1-1.3 mh)
Signal Output: 6-28 VDC squarewave proportional to input voltage
Minimum load 1K
Short circuit protection
Features: Individual LED indicators for power and signal output
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 SP717 Modulated Carrier Amplifier is a meter mounted device designed to produce a
carrier frequency in conjunction with an RF pickup coil, detect the shift in the carrier frequency
(modulation) that occurs with the passage of magnetic material and generate a squarewave
output pulse with each shift in the carrier frequency. The amplitude of the output pulse is
equivalent to the input supply voltage of the SP717.
The modulated carrier principle introduces no drag on the passing magnetic device, therefore,
when incorporated with a turbine flowmeter, extension of the flowmeter’s nominal linear range
at the low end is realized. This parameter is particularly useful when measuring a low mass gas
at the low end of the flowmeter’s flowrate spectrum.
LED’s are provided to indicate the presence of the input supply voltage and the output pulse.