Max Machinery 272-5X8 BIDIRECTIONAL TRANSMITTER (210_240 SERIES FLOW METERS) - Manual (Page 2)

GENERAL DESCRIPTION
The 272 Series Transmitters convert the rotary motion of a flow meter into a voltage proportional to
flow. A magnet sealed within the flow meter housing rotates in step with the metering elements. The
varying magnetic field is sensed by an external stator with a two phase winding. The resulting AC
voltage is scaled and converted to DC.
The 272-5X8 Transmitters use two Hall Effect sensors in addition to the stator coil to measure the
position of the magnet as well as its velocity. This allows bidirectional flow rate monitoring with a ±
10V output.
The electronics utilize low current, chopper stabilized op amps for stable and extremely accurate
results over widely varying environmental conditions.
The Model 272 transmitter ’s flow monitoring technique results in a quick response to flow changes
with negligible mechanical drag on the metering elements. Since the sending magnet is totally
sealed within the flow meter, problems associated with dynamic seals are eliminated.
Page 2 272-500-350 © 1996 (Rev. 8/00) Max Machinery, Inc.
Discontinued