Introduction
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1. INTRODUCTION
The Model 214Di Batch Controller is a microprocessor based instrument
which accepts a frequency or pulse input from a wide range of
flowmeters
and automatically controls the batching of fluids via a one stage or two
stage control valves. The instrument displays the Preset value, a
Resettable
Batch Total and an accumulated Total directly in engineering units.
The Batch Controller is intrinsically safe and can be used in hazardous
areas provided it is connected as directed to approved flowmeters and
control solenoids.
The Model 214Di is fully programmable from the front panel; the
user
can program scaling factors, decimal point positions, valve delays and
signal timeouts.
The instrument is compatible with a wide range of flowmeters. Links on
the
input board enable the circuit to be configured for millivolt signals, reed
switches, Namur proximity switches and most other signal types.
The instrument is housed in an attractive polycarbonate enclosure
which
is completely watertight. A universal bracket is supplied as standard
for
wall mounting while optional pipe or panel mounting brackets are
also
available.
The Model 214D is an upgraded version of the Contrec Model 214. The
following improvements have been made in the Model 214D:
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The voltage drop across the solenoid outputs in the 214D is only 0.8
Volts.
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The voltage supply for the DC input can go as low as 9 Volts.
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The 214D has an overall lower current consumption than the
previous
model with an improved battery life - the battery life in the new
model is typically 5 years regardless of the time the unit spends in
totalising or batching modes.
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The millivolt input can accept signals as low as 15mV P-P.
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The 214D has a wide frequency range - 0Hz to 10kHz.