Liquid Controls SP718-V REV. A - Manual (Page 2)

Sponsler, Inc. SP718-V Modulated Carrier Amplifier pg 2 DOC#: MN-718V-A
SPECIFICATIONS
Temperature: Operating 0 – 70
o
C
Storage –20 – 85
o
C
Input Voltage: 110VAC 60Hz or 12 – 16.5VDC 50mA MAX
Observe Polarity
Consult factory for other Input Voltages
Signal Input: Frequency 0 – 3500 Hz w/ 50KHz carrier (requires P/U Coil 1 – 1.3 mh)
Analog Output: 0V @ 0Hz, 5 or 10 V @ desired Full Scale Frequency
Full Scale Range 60 Hz – 3500 Hz Selectable
Consult factory for other Ranges
Response Time 95% of change in 1 second
Linearity .3% F/S
Tempco <2% of Reading over entire Temperature Range
Maximum Load Resistance 1000 ohms
Features: Switch Selectable Output Range
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 SP718-V Modulated Carrier Amplifier and Analog Transmitter is a meter mounted device designed to
combine the advantages of the Modulated Carrier principle with the convenience of an Analog Output in a
single PCB Assembly. The SP718-V linearly converts the detected carrier frequency shift rate to an
equivalent voltage output level, 0-5V/0-10V that is switch selectable. When incorporated with a turbine
flowmeter, a voltage representation proportional to flow is obtainable.
The SP718-V produces a carrier frequency in conjunction with a RF pick-up coil, detects the shift in the
carrier frequency (Modulation) that occurs with the passage of magnetic material and linearly generates a
voltage output that is proportional to the rate of Modulation.
A full-scale frequency range of 60-3500Hz is jumper selectable. The Span adjustment establishes the
frequency point at which the Full Scale Output is achieved.
The Modulated Carrier principle introduces no drag on the passing magnetic device therefore; when utilized
with a turbine flowmeter extension of the flowmeter’s nominal linear range at the low end of the flow
spectrum is realized. This parameter is particularly useful when measuring a low mass gas and the
operating flowrate is at the flowmeter’s low end.