DESCRIPTION
The Model 441A Frequency-to-voltage Converter produces an
analog output that precisely represents the frequency of an
applied input signal. Adjustable input frequency to output voltage set points
allow the user to closely bracket the frequency of interest.
The unique crystal-controlled microcontroller design assures
fast response, high conversion accuracy, and low output noise
that is independent of frequency. The front-panel display shows
the input frequency with up to five-digit resolution. All operating
parameters are set using the display and the front-panel controls.
These settings are retained in non-volatile memory.
The Model 441A input signal conditioner automatically provides stable
operation for a wide range of pulse-, square-, and sine-wave
signals from under 10 millivolts to 100 volts in amplitude.
The Model 441A combines the latest electronic microcontroller
technology with surface-mount construction to produce a true
breakthrough in frequency-to-voltage products. Indeed, these
instruments represent a worthy addition to the Ectron line
of 400 Series products that have provided exceptional performance
and reliability in rugged applications for the past 25 years.
Designed into this model is rapid response to any change in
frequency, low output noise that is independent of input
frequency, and input-signal conditioning that automatically
provides correct operation for a great variety of input signals,
both in wave shape and amplitude.
Gone is the clutter of switches,
knobs, pots, etc. associated with other frequency-to-voltage
converters. All has been replaced
with two easy-to-use, front-panel controls: the display and
the encoder knob.
The backlit digital display/push-button
has the dual function of display and screen selection. Seven
easy-to-use, setup screens, six less frequently used screens, and the operate
screen are accessible at the touch of the display.
The encoder, a rotary/push-button
control, has the dual function of character selection and
change. The user can easily configure
the Model 441A to any specific application
desired.
With an input frequency range of 1 Hz to 50 kHz and
an output voltage range of –10 V to +10 V, the Model
441A offers precise frequency-to-voltage conversion
for almost any application.
The Digital Periodic Filter virtually eliminates output noise that originates
from cyclic variation caused by irregularly spaced wheel cogs or vanes of a flow
meter. The user simply sets the filter to the number of
pulses per revolution of the device under test and the
Digital Periodic Filter stops the periodic variation on the output. Selectable
filter settings are from 1 to 999 pulses per revolution.
Because the Model 441A operates from any dc power from
10.5 V to 32 V, uses the same connector, and has the
same pin assignments for signal input, output, and power
as all other Ectron 400 Series products, it can be used – even
intermixed – with Models 352, 418, T418, 428, 441AL, and 451
Amplifier / Conditioners in all standard Ectron enclosures
designed for these products.
400 SERIES ENCLOSURES
Ectron 400 Series enclosures provide connector interface for
power and signal input and output connections for 400 Series
products. Portable, bench mount, rack mount, and signal-conditioning
systems are available with capacities from 6 to 22 conditioners.
The following Ectron products are interchangeable in these
enclosures: the Models 352 and 428 conditioner amplifiers,
the Model 441A/AL frequency-to-voltage converter, and the Model
451 LVDT/RVDT signal conditioner. Thermocouple conditioning
can be added using the 200 Series T/C Mate.
Model E408-1D Channel Enclosure shown
with optional DIN rail mount
Model E408-6 Six Channel Portable Enclosure (front and rear views)
 
Model R408-14 Rack Mount Enclosure (front and rear view)
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