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LVDT Indicators :
AI310, AI311, AI312
Digital LVDT Indicator
AI 350, AI 352
Digital AC LVDT Indicators
AI341/
AI346
High Resolution LVDT Indicator
AI372
Microprocessor based LVDT Indicator
AGMPL Material Testing Machines
catalogue.
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Digital AC LVDT
Indicators
For Measurement and
Display of AC LVDT Output
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Digital LVDT Indicator
- AI 310, AI 311, AI 312 |
datasheet |
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AI310,
AI311 and AI312 are high performance, panel
mounting and mains powered digital LVDT Indicators
designed for measurement and control applications
involving LVDT based displacement transducers.
Front panel mounted ZERO, SPAN and PHASE
controls allow interfacing of either our LVDTs or those
of other reputed manufacturers. AI310 is used only for measurement or monitoring
AI311 and AI312 are used for both measurement and
control.
Options include voltage output, 4 to 20 mA current
output and peak-hold facility.
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Specifications |
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| LVDT Excitation |
Factory Set at 2.0
Vrms, 2kHz |
| Display |
3½ Digit LED ( 1999
counts) |
| Display
Resolution |
0.001 mm with LVDT having
FSR of upto ±2mm
0.01 mm with LVDT having FSR of upto ±20mm
0.1 mm with LVDT having FSR of upto ±200mm |
| Signal
Conditioning Controls |
Zero: to set display to
000 at any position of LVDT core rod within its FSR
Span: to calibrate display in engineering units of
displacement
Phase: to compensate for primary to secondary phase
shift of LVDT coils |
| Measurement Accuracy |
Better the 0.1 % FSR |
| Power Source |
230 V ± 10 % , 50 Hz |
| Set Points |
AI310 - None
AI311 - One
AI312 - Two |
| Set Point Settabiliy |
0 to +1999 counts |
| Relay Contacts |
1 c/o ( NO-P-NC) Contact
per set point |
| Contact Rating |
5 amps., 250 V AC or DC |
| Dimensions |
Bezel : 192 x 96 mm
Depth: 200mm
Panel Cutout : 188 x 92 mm |
| Transducer Connector |
5 pin on rear panel |
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 These are a family of
compact , low cost AC LVDT
Indicators. They are used to for measurement of linear displacement
values through AC LVDTs.
AC LVDT of any full stroke range can be calibrated through front panel
mounted screw driver controls and linear displacement can be displayed
on the digital display in any engineering units.
Models with set point control, analogue voltage output, 4 to 20 mA
output etc are available as standard.
These simple-to-use indicators can be either fitted
on a panel or used as table-top instruments. |
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Specifications |
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Model |
AI350- Display only ; AI352-
Display and two set point control |
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Display |
3½ Digit LED ( 1999 counts) |
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Display Resolution |
0.001 mm with LVDT having FSR of upto
±2mm
0.01 mm with LVDT having FSR of upto ±20mm
0.1
mm with LVDT having FSR of upto ±200mm |
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Signal Conditioning Controls |
Zero: to set display to 000 at any
position of LVDT core rod within its FSR
Span: to calibrate display in engineering units of
displacement
Phase: to compensate for primary to secondary phase
shift of LVDT coils |
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Measurement Accuracy |
Better the 0.1 % FSR |
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Power Source |
230 V ± 10 % , 50 Hz |
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Set Points |
AI350 - None
AI352 - Two |
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Set Point Settabiliy |
AI350 - Not applicable ; AI352 -0 to
+1999 counts |
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Relay Contacts |
AI350 - Not applicable; AI352 - 2Amps
1 c/o , contacts terminated on the rear panel |
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Contact Rating |
5 amps., 250 V AC or DC |
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Dimensions |
Bezel : 96 x 96 mm
Depth: 250mm
Panel Cutout : 92 x 92 mm |
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Transducer Connector |
5 pin on rear panel |
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High Resolution LVDT Indicator
AI341/ AI346 |
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The AI341 and AI346
are designed for applications which require measurement through
longer range LVDTs with higher resolutions. Its 4½ digit LED
display, having a display range of ±19,999 counts, allow
resolutions upto 0.0001mm (1 micron) with LVDTs upto ±20 mm full
stroke range and 0.01 mm resolution with LVDTs upto ±200mm full
stroke range.
Use of instrumentation
grade integrated circuits and careful PCB layouts design
increases stability, repeatability and reliability.
LVDTs of any range can
be connected to these indicators and display can be calibrated
to give displacement reading directly in engineering units.
AI346 with additional
facility of dual set point control combines high resolution
measurement with set point controls. Set point relay contacts
are terminated on the rear panel |
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Specification |
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FOR AI341 & AI346 |
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LVDT excitation |
Adjustable from 0.5 to 3.0 Vrms:
2kHz Factory set at 2.00 Vrms |
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LVDT acceptable |
3,4,5 or 6 wire type |
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Amplifier Gain |
2 to 20 adjustable |
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Output offset (zero) |
0 to + 2V adjustable
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Digital display |
4½ digit (_ 19,999 counts) |
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Measuring resolution |
LVDT FSR
RESOLUTION
upto 20mm
0.0001 mm
upto 200mm
0.01 mm
above 200mm
0.1 mm |
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Power source |
230 V ± 10%; 50 Hz |
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Dimensions |
Bezel
192x96mm |
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FOR AI346 only |
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Set point setability |
0 to 1999 counts |
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No. of set points |
2 |
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Relay contacts |
1 changeover contact per set point
(NO-P-NC) |
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Contact rating |
2 amp,250V at resistive |
Microprocessor based LVDT Indicator AI372 |
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 AI372
is a microprocessor based Indicator specially designed to allow
precise measurement of linear displacement through AC LVDTs.
Its features include 16 character by 2 line alphanumeric LCD
Display with backlight provision for viewing under low ambient
light, push button controlled zeroing (nulling) at any point
within the full stroke range of the LVDT connected to it, user
programmable calibration factor for accurate engineering unit
conversion, RS232 based computer linkup with application
software available as option, printer port for direct connection
to a dot matrix printer for online printing of measured values
at regular intervals.
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Application Software
ASgraf
(At
Extra cost)
q Windows compatible
q Data Acquisition from AI
372 via RS 232 port
q Display of measured values
on PC monitor in numerical and graphical
format
q Data Storage on Hard disk
q Off-line
viewing of previously stored data in graphical format
q Test report generation |
Features
q Alphanumeric LCD Display
q Direct Display in
millimeters
q Push button zeroing
q Computer Connectivity
q Dot Matrix printer port
q Data Storage
q AI 372 C is equipped with
Two Control Relays |
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Specifications |
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Models
q
AI 372 One channel
q AI 372 C One channel ; 2 relays
q AI 372-2 Two channel
q AI 372-2
C Two channel; 2 relays
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Acceptable Transducer |
AC LVDT |
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Display |
16 char x 2 line, Alphanumeric, LCD, Backlit |
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Front panel |
Membrane key pad ;
six keys |
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Transducer Excitation |
2 V rms, 2Khz, Sine wave |
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Display Resolution |
With LVDT up to 20 mm : 0.001 mm
With LVDT up to 200 mm: 0.01 mm
With LVDT above 200 mm: 0.1 mm |
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Calibration with LVDT |
Through user programmable Calibration Factor |
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Measurement accuracy |
< 0.1 % FSD, excludes LVDT Non linearity. |
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Computer linkup |
RS 232 port; 9600 bauds |
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Application Software |
S Graf (Optional at extra cost); Windows ™
compatible |
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Dot Matrix printer port |
Centronics compatible |
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Power Source |
230 VAC, 50 hz |
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Dimensions |
178(h) x 270(W) x 320(d) mm |
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