Meriam M2110L SMART LEVEL GAUGE - Manual

9R143 Dated 3/2011
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Meriam’s M2110L Smart Level Gauge is
a microprocessor-based pressure sensing
device with algorithms to calculate level.
The various sensors provide dip- tube
bubbler accommodation, or direct head
level measurements. Three config-
urations are available: Battery, SetPoint,
and Current Loop models.
All models are programmable through the
front keypad, to allow configuration of
the gauge. The user’s program
information is stored in non-volatile
memory, and is retained when the power
to the gauge is removed. SetPoint and
Current Loop models can also be
configured through the RS-232 serial
communication connection.
The Battery model is powered by its internal lithium batteries only. This model does not provide
any outputs or RS-232 communications.
SetPoint and Current Loop models have outputs that can be used for control or
indicating/recording functions. Both models also have RS-232 communications capability. In
addition to configuring the gauge, the RS-232 port can be used to monitor and log the measured
level/pressure data and output status. It can also be used as part of a control system with digital
capabilities.
The SetPoint model provides two SPDT relay outputs with adjustable deadband. This
configuration provides normally open or normally closed contact operation for fail-safety.
Switching SetPoint can be set from 0 to +120% of the full scale level/pressure range. The
SetPoint model is powered by 115/230 VAC, or 24VDC.
The Current Loop model provides a 4 to 20 mA output, and is intended to be used as a level
transmitter on a three or four wire loop. Zero and span are set through user-programmable
registers, from 0 to +120% of the full scale pressure range. The output is capable of normal and
reverse action. The Current Loop model is powered by 24VDC only.
M2110L SMART LEVEL GAUGE
OPERATING INSTRUCTIONS