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- High performance displacement measurement
system
- For use against all metallic and non-metallic
surfaces, such as steel, aluminium, plastics, glass
and ceramics
- High accuracy and thermal stability
- Simple calibration procedure
- May be used with sensor temperatures
up to 200°C
- Internal adjustment for different
sensor sizes
- Standard 1 kHz frequency response,
5kHz optional
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DESCRIPTION
The FT1000-D module is a single channel displacement
amplifier designed for use with standard CDT sensors.
The FT2000-D module is a twin channel version of the
single channel unit. The electronics are housed in a
ruggedised enclosure to cater for a wide range of industrial
applications and are designed to operate with sensor
temperatures up to 200°C. Power supply is 11-18VDC.
System output is 0-10V analogue.
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SPECIFICATION
| SYSTEM PART NUMBERS
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| Single Channel Module |
FT1000-D |
| Twin Channel Module |
FT2000-D |
| MEASUREMENT RANGE |
| Sensor Size |
Electrode |
Linear range |
Max Working |
Typical Capacitance Range Over
Linear Range |
| Ø8.0mm |
Ø2.0mm |
0.10 - 2.0mm |
5.0mm |
0.280pF to 0.014pF |
| Ø15.0mm |
Ø4.0mm |
0.20 - 4.0mm |
10.0mm |
0.560pF to 0.028pF |
| Ø30.0mm |
Ø8.0mm |
0.40 - 8.0mm |
20.0mm |
1.120pF to 0.056pF |
Stated measurement ranges are
against metallic surfaces and may be reduced when
applied to non-metallic materials. Figures quoted
are for standard CDT sensors calibrated with FT1000-D
or FT2000-D electronics. Sensors should be grounded
to earth during normal operation. Larger sensors
are available to special order. |
| GAIN RANGE |
20:1 variable gain amplifier with
1/X output |
| Maximum Target Capacitance |
1.12pF full scale |
| Jumper Posn |
Input Range |
Output |
Board-Mounted Potentiometer |
| "High" gain |
0.280pF to 0.014pF |
0.5v to 10v |
"High" gain 0.010pF to 0.005pF |
| "Med" gain |
0.560pF to 0.028pF |
0.5v to 10v |
"Low" gain 1.000pF to 0.050pF |
| "Low" gain |
1.120pF to 0.056pF |
0.5v to 10v |
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| PERFORMANCE |
| Accuracy |
± 0.2%
of full scale |
| Repeatability |
± 0.1% of full scale
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| Stability |
100ppm/°C
typical |
| Filter Type |
3 pole Butterworth 1kHz
(100Hz to 5kHz by resistor change) |
| Rise Time |
300
µs (1kHz filter) |
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| INPUTS |
Sensor Type |
CDT series (low
temp) |
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Connector Type |
Microdot |
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Cable Type |
Low noise 100%
screened flexible coaxial |
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Cable Length |
2 metres standard, 5 metres maximum
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Cable Diameter
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2.0mm |
| OUTPUTS |
Connector Type |
BNC |
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Cable Type |
50 Ohm coaxial
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Cable Length |
Up to 100 metres |
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Range |
0-10V analogue
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| TEMP RANGE
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Electronics |
0 - 50°C |
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Sensor |
0 - 200°C |
| POWER SUPPLY
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Standard Supply |
11-18VDC |
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Power Consumption
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120mA @ 18VDC,
200mA @ 11VDC |
| GENERAL
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Module size (W x D x H) |
200mm x 100mm x 60mm |
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Mounting |
4 hole access through
base plate |
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