FT1000 Industrial Electronics
High Temperature

FT1000 High Temperature
  • 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 850°C
  • Internal adjustment for different sensor sizes
  • Standard 1 kHz frequency response, 5kHz optional
DESCRIPTION
The FT1000-DHT module is a single channel displacement amplifier designed for use with high temperature CDT sensors. The FT2000-DHT 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 850°C. Power supply is 11-18VDC. System output is 0-10V analogue.



SPECIFICATION

SYSTEM PART NUMBERS
Single Channel Module FT1000-DHT
Twin Channel Module FT2000-DHT


MEASUREMENT RANGE
NOTE:

High temperature CDT-HT sensors are usually application specific and are custom designed accordingly. Minimum electrode size is typically Ø5mm, with larger versions available up to Ø30mm. Maximum working range is typically 2 x electrode diameter.

The above working range is valid against metallic surfaces, but may be reduced when applied to non-metallic materials. Ranges quoted are for high temperature CDT sensors calibrated with FT1000-DHT or FT2000-DHT electronics. Sensors should be grounded to earth during normal operation.


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  


PERFORMANCE
Accuracy ± 0.2% of full scale
Repeatability ± 0.1% of full scale
Stability 100ppm/°C typical
Filter Type 3 pole Butterworth 1kHz (100Hz to 5kHz by resistor change)
Rise Time 300 µs (1kHz filter)
     
INPUTS Sensor Type CDT series (high temp)
  Connector Type Lemo miniature triaxial
  Cable Type Low noise mineral insulated triaxial, plus optional flexible extension
  Cable Length 2 metres standard, 5 metres maximum
  Cable Diameter 3.5mm MI, 3.0mm flexible
OUTPUTS Connector Type BNC
  Cable Type 50 Ohm coaxial
  Cable Length Up to 100 metres
  Range 0-10V analogue
TEMP RANGE Electronics 0 - 50°C
  Sensor 0 - 850°C
POWER SUPPLY Standard Supply 11-18VDC
  Power Consumption 120mA @ 18VDC, 200mA @ 11VDC
GENERAL Module size (W x D x H) 200mm x 100mm x 60mm
  Mounting 4 hole access through base plate

 
 
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