High frequency capacitive unit for twin coaxial® probes : CAP 1802 a/b

• DISTANCE RANGE : From 0→ 2 mm to 0 → 10 mm according to the diameter of the double electrode sensor used (coaxial type)
• BTC LINEARITY : < +/- 0.8 % (F.S.O) OF THE PROBE RANGE
• TEMPERATURE DRIFT (/ °C) < 0.2 % (F.S.O) OF PROBE RANGE (Operating temperature: from -20°C to + 50 °C)
• BTC BANDWIDTH : 0 to 250 kHz typical (-3dB)
• BTC DYNAMIC RESOLUTION AT MID SCALE DISTANCE:
 50 µm @ 250 kHz bandwidth
• BTC OUTPUT: 0 / +10V LINEAR VARIATION vs PROBE TO
TARGET CAPACITANCE
• TIP TIMING OUTPUT: ONE PULSE FOR EACH PASSING BLADE
- insensitive to blade tip clearance variation
- insensitive to casing vibration.
- time or arrival uncertainty improved compared to one electrode
sensor systems
• BTC OFFSET OUTPUT ADJUSTMENT & COMPENSATION OF TEMPERATURE EFFECTS ON PROBE: automatic
• PROBE CABLE LENGHT EFFECT COMPENSATION: automatic
• ADJUSTABLE BTC OUTPUT GAIN : 1 to 10 ratio
• PACKAGING : stand alone (CAP 1802 b ; +/-15 V DC supply) or 3U (CAP1802a) module for 19' rack for multichannel application
• COMPATIBLE WITH HIGH TEMPERATURE COAXIAL “DOUBLE ELECTRODE” SENSORS (Temperature range: up to +1100°C)
• COMPATIBLE WITH DEDICATED ACQUISITION & PROCESSING SOFTWARE (BTC & BTT)