Max Machinery 276-5XX SERIES 4-20MA TRANSMITTERS - Manual (Page 2)

General Description: The Max 276 Series Transmitters are 4-20mA output devices available
in two versions: One for the Max 210 Series Flowmeters and one for the 220/240 Series. Each
is available with either amphenol connectors or in a weather-tight, explosion proof version for
use with conduit.
The transmitter uses a stator coil to sense the motion of a rotating magnet contained within the
flow meter. This generates a two phase AC signal with a voltage proportional to the flow rate.
The Transmitter electronics convert this signal to a DC voltage and then into the 4-20mA flow
proportional output.
The 276 transmitter is a two wire, loop powered device that uses about 3.5mA of the 4-20mA
which normally flows through the Transmitter. It will operate correctly with a minimum
voltage of 11.5 V and up to a maximum of 35 V.
On board controls include a Zero adjustment, Range and Span settings, and a three pole
damping filter. An LED indicates over range conditions which can cause a loss of accuracy.
When used with the Max 210 Series Flowmeters, the 276 Transmitter can be adjusted to
electronically demodulate the nonlinear rotational rate of the crankshaft. This effect is inherent
in piston type flow meters.
The Max 276 Series Transmitters generally provide faster response to flow rate changes than
pulse type Transmitters. This is particularly true with the 210 series meters at low flow rates.
( 2 ) 276-515-350 © 2006 Max Machinery, Inc.
GENERAL DESCRIPTION
Discontinued