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These
instruments accept inputs from various analog voltage sources,
including DC-to-DC LVDT's, potentiometer-type sensors,
Hall-Effect devices, photocells, current shunts, and the
outputs of other instrument systems with various grounding
configurations and voltage/impedance levels.
The
Model 3163 Analog Input Conditioner is the basic "Form
1" instrument.
The
Model 3263 Analog Input Conditioner / Indicator is the "Form
2" instrument, providing vivid front-panel digital
indication of measured values, scalable in desired engineering
units.
The
Model 3363 Analog Input Conditioner / Indicator / Controller is the "Form
3" instrument, and includes HI/LO limit detection
with control output. |
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The
signal source can be grounded or floating, and may use 2-, 3-, or 4-wire
cabling, as shown below. A regulated 10-V supply is provided for
excitation of potentiometers, DC-to-DC sensors, and similar devices.
Full-scale sensitivity is continuously adjustable in four
jumper-selectable ranges. Three standard 5-V outputs are provided
(see Specifications).
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Signal
Source Configurations for the Models 3163, 3263, 3363 |
With
a sensitive, high-impedance floating differential input, wide common-mode
range, and exceptional common-mode rejection, these models can be used to
obtain difficult low-level signals from highly off-ground sources, without
common-mode AC or DC offset problems.
Selectable
low-pass active filtering allows the smoothing of unwanted normal-mode
dynamic components that might prevent stable digital conversion or control
action.
For
a typical 3263 operation, see the following application:
3000
Series options applying to these instruments include
Analog
Input Instrument Specifications [Top 
]
(Click
here for 3000 Series General Specifications)
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Input
Type |
2-,
3-, or 4-wire DC voltage source, floating or grounded (see diagram,
above) |
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Input
Ranges (full-scale) |
Full-scale
sensitivity continuously adjustable in jumper-selectable ranges of 50 to
500 mV, 500 mV to 5 V, 5 to 50 V, and 50 to 250 V |
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Excitation
Supplied |
Regulated
10 VDC ±0.02%, 20 mA maximum, for excitation of potentiometers, DC-to-DC
sensors, and similar devices |
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Analog
Outputs |
Three
outputs, each ±5 VDC full-scale with 50% overrange, 5 mA maximum; low-pass corner
frequencies of 2 Hz, 200 Hz, and 2 kHz, respectively |
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Common-Mode
Range |
±100
VDC |
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Common-Mode
Rejection Ratio |
-70
dB, DC to 60 Hz |
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Input
Impedance |
1
MΩ (all ranges) |
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Analog
Filtering |
Active
low-pass filters provide -60 dB per decade above cutoff frequency
("f"); full-scale slew time is 1.4/f sec |
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Output
Ripple and Noise |
0.15%
of full scale (rms) maximum for 200-Hz and 2-kHz outputs; 0.02% of full
scale (rms) maximum for 2-Hz output |
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Accuracy
(typical, following calibration) |
0.1%
of full scale for 60 days ("hands off") following initial
calibration |
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Display
Resolution (Models 3263 and 3363) |
0.02%
of full scale |
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