|
 The
Model 4030 or 4032 AC LVDT Conditioner/Indicator/ Controller accurately
measures displacement, force, pressure, and other parameters
obtained with a 5- or 7-wire LVDT sensor or with a 3- or 5-wire variable
reluctance transducer.
The
Model 4030 is a single-channel instrument, and has standard
input provisions for "long-stroke" LVDT's (full-scale range of ±1
inch or greater). The Model 4032 can accommodate either one
or two inputs, either or both of which may be reconfigured for
"long-stroke" LVDT's (contact
the factory for details).
Accepting
two independent displacement signals, the Model 4032 allows direct
measurement of thickness—when the two inputs are summed by means
of an internal "CALCULATE" channel—or
of taper—when their difference is calculated. See the three
4032 applications listed below.
Working
on the synchronous carrier-demodulator principle, these instruments supply
regulated, remotely sensed excitation for each transducer input.
They then demodulate, filter, and amplify the resulting signal to produce
a reading precisely proportional to LVDT core displacement.
The
Model 4030 automatically adjusts to the signal phase shift of the
transducer in use, thereby insuring optimum sensitivity and
linearity. The Model 4032's full-scale input ranges are
0-120, 0-240, and 0-480 mV/V—selectable via the RANGE
(RNG) command (an LVDT's full-scale "mV/V" rating can be
easily calculated by multiplying its rated sensitivity—expressed in
"mV/V/0.001 inch" or in mV/V/mm"—by the full linear range
of the sensor, in thousandths of an inch or in millimeters).
As
with most standard 4000 Series models, both active low-pass filtering and
user-selectable digital smoothing are provided by the Models 4030 and 4032
(see Specifications). Internal 15-segment
linearization allows easy calibration of nonlinear LVDT inputs.
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Functions
Provided by the
MODEL 4030 / 4032 "STANDARD
CONFIGURATIONS"
(for
complete listings of these configurations, click
here) |
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A
preprogrammed tare function may be activated by front-panel
button |
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Via
front-panel buttons, you can call to display the
"live" tared input (or, in the case of the 4032, either of
the two "live" tared inputs); the maximum (most
positive) value of that input since last reset; the minimum
(least positive) value of that input since last reset; or the
existing net difference between these maximum and minimum
values. The "MAX minus MIN" function is particularly
useful when you need to know the precise range of an excursive
phenomenon like the runout, wobble, or looseness of a rotating
part—as in the Total Indicated
Runout (TIR) application of the 4030. |
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The
"MAX" and "MIN" functions can be reset by a front-panel
button |
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For
the single "live" tared input of the Model 4030,
each of the standard seven predefined limit
zones is tied to a specific nonlatching logic output—see
Dimensional Classification of Parts |
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For
each "live" tared input of the Model 4032, each of three
predefined limit zones ("HIGH," "OK," and
"LOW") is tied to a specific nonlatching logic output |
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The ±10
VDC analog output of the Model 4030 derives from the
tared analog input, and is initially scaled for 1 mV of output per
0.001 unit of length |
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The ±10
VDC analog output of the Model 4032 is not
initially tied to any specific channel |
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There
are special versions of the Models 4030 and 4032 for true, on-line
Statistical Process Control (see the Model
4K/SPC-30 and the Model 4K/SPC-32).
For
typical 4030 operations, see the following applications:
For
typical dual-channel 4032 operations, see the following applications:
4000
Series options applying to the Models 4030 and 4032 include
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AC
LVDT Instrument Specifications [Top 
]
Unless
otherwise indicated, stated specifications apply
equally to the Model 4030 and the Model 4032.
(Click
here for
4000 Series General
Specifications; see also
the statement
on Daytronic accuracy specifications)
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Number
of Inputs |
Model
4030: One
Model 4032: One or two |
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Input
Type |
Series-opposed
5- or 7-wire LVDT sensor or 3- or 5-wire variable reluctance transducer
capable of 4000-Hz operation and having primary impedance of 80 Ω or
greater |
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Sensitivity
Range(s) |
Model
4030: Automatically adjusted to accommodate full-scale ranges from ±0.010
in. (±0.25 mm) to ±6.0 in. (±15.24 cm)
Model 4032: Selectable 0-120, 0-240, and 0-480 mV/V, full scale |
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Excitation
Supplied |
Nominal
3 VAC (rms) at 4000 Hz; 40 mA maximum |
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Common-Mode
Range |
±50
V operating; ±12 V without instrument damage |
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Common-Mode
Rejection Ratio |
Infinite
at DC and 60 Hz; -60 dB at 3 kHz |
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Input
Impedance |
Differential:
400 kΩ
Common-Mode: 100 kΩ |
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Offset |
Initial:
±3% of full scale
Vs. Temperature: ±20 ppm/°C
Vs. Time: ±0.01% of full scale/month
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Gain
Accuracy |
±0.02%
of full scale ± 1 count LSD, typical, following calibration* |
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Gain
Stability |
Vs.
Temperature: ±50 ppm/°C
Vs. Time: ±20 ppm/month
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Analog
Filtering |
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Filter |
Model
4030: 3-pole
modified Butterworth; -3 dB at 10 Hz; -60 dB at 100 Hz
Model 4032: 2-pole
modified Butterworth; -3 dB at 7.5 Hz; -60 dB at 110 Hz
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Step
Response Settling Time (Full-Scale Output) |
Model
4030:
To
1% of final value: 130 ms
To 0.1% of final value: 150 ms
To 0.02% of final value: 200 ms
Model 4032:
To
1% of final value: 250 ms
To 0.1% of final value: 300 ms
To 0.02% of final value: 400 ms
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* Initial (uncalibrated)
inaccuracy may be as great as ±3% of full scale. Maximum error that
could occur upon replacement of the Model 4030 or 4032 not followed by
calibration is ±6% of full scale.
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