Two-color pyrometer CellaCrystal PA 44

monochromaticwith LED display°C

Overview:
The CellaCrystal PA 44 is an optical two-colour (ratio) pyrometer developed for temperature measurement during crystal growth. Calibration is adapted to crystal production. Hybrid signal evaluation provides a constant high resolution of < 0.1 K over the measuring range and the sensor design ensures very high long-term stability. Alignment is possible via through-the-lens sighting, laser pilot light or integrated video camera.

Special features:

• Measuring range 750 to 3,000 °C
• Calibration variants optimized for silicon crystal production (PA 44 AF 4 / AF 5) and for silicon carbide (PA 44 AF 7)
• Hybrid signal evaluation for high metrological resolution
• High long-term stability due to minimal self-heating
• Focusable lens for precise adjustment of measuring distance
• Standard interfaces: analogue output and USB/RS-485 (IO-Link on selected models)

Versions / Selected models:

• CellaCrystal PA 44 AF 4
• CellaCrystal PA 44 AF 5
• CellaCrystal PA 44 AF 7
• CellaCrystal PA 44 AF 9

Measuring field (distance vs. measuring field diameter):

• 0.00 mm | 18.00 mm
• 16.00 mm | 17.39 mm
• 32.00 mm | 16.77 mm
• 48.00 mm | 16.16 mm
• 64.00 mm | 15.55 mm
• 80.00 mm | 14.93 mm
• 96.00 mm | 14.32 mm
• 112.00 mm | 13.71 mm
• 128.00 mm | 13.09 mm
• 144.00 mm | 12.48 mm
• 160.00 mm | 11.87 mm
• 176.00 mm | 11.25 mm
• 192.00 mm | 10.64 mm
• 208.00 mm | 10.03 mm
• 224.00 mm | 9.41 mm
• 240.00 mm | 8.80 mm
• 256.00 mm | 8.19 mm
• 272.00 mm | 7.57 mm
• 288.00 mm | 6.96 mm
• 304.00 mm | 6.35 mm
• 320.00 mm | 5.73 mm
• 336.00 mm | 5.12 mm
• 352.00 mm | 4.51 mm
• 368.00 mm | 3.89 mm
• 384.00 mm | 3.28 mm
• 400.00 mm | 2.67 mm

Technical specifications:

• Measuring range: 750–3000 °C in sub-ranges (different AF versions available)
• Measuring principle: two-colour (ratio) pyrometer
• Sensor: double photodiode
• Spectral range: 0.95 / 1.05 µm
• Response time t98: ≤ 10 ms (conditions vary by sub-range; see datasheet)
• Measurement uncertainty: 750–850 °C: 6 K; 850–1,500 °C: 0.35 % of reading + 2 K; 1,500–2,400 °C: 0.5 % of reading + 2 K; 2,400–3,000 °C: 1 % of reading + 2 K
• Repeatability: 2 K
• Temperature coefficient: 0.05 %/K
• Resolution current output: 0.2 K + 0.03 % of selected range; interface resolution: 0.1 K; display resolution: 1 K
• Lenses / optical variants: standard PZ 20.01 (0.4 m–∞), close-up PZ 20.03 (0.2–0.4 m), telephoto PZ 20.06 (1.2 m–∞)
• Measuring field shape: round
• Distance ratios (typ.): AF 7 = 150:1; AF 5 = 140:1; AF 9 = 240:1
• Analog output: 0(4)–20 mA linear, switchable, scalable (R ≤ 500 Ω)
• Analog input: 0–10 V
• Switching outputs: 2 × open collector 24 V DC, ≤ 30 mA; Switching inputs: 2 × up to 24 V
• Interfaces: USB and RS‑485
• Power supply: 24 V DC +10 % / -20 %; current consumption ≤ 175 mA
• Camera (camera models): video output Composite PAL, 1 Vpp, 75 Ω; sighting options: through-the-lens, laser pilot light, camera
• Display and controls: 4-digit red LED (8 mm), 2 status LEDs, 3 buttons
• Connection: M12 thread, 8-pin
• Ambient temperature (operation): 0–65 °C; storage: -20–+80 °C
• Permissible humidity: 95 % r.H. max. (non-condensing)
• Dimensions: Ø 65 mm × 220 mm (max. 277 mm); Weight: approx. 0.9 kg
• Housing: stainless steel V2A (1.4305); Protection class: IP 65 (DIN 40050)
• Scope of delivery: Pyrometer CellaCrystal PA 44, connection cable VK 02/A (5 m), video cable VK 02/F (5 m) for camera models, USB cable VK 11/D (1.8 m), CellaView software, short manual
• Adjustable parameters and functions (selection): measuring range, analogue I/O scaling, smoothing filter, memory/hold, emissivity, transmittance, compensation of reflected ambient radiation, alarm limits and modes, ATD function (optional), linearization, simulation of current/temperature, unit °C/°F, measurement channel selection (two-colour / single-colour)
• Functions: overtemperature signal (internal temp > 80 °C triggers analogue output > 20.5 mA), service simulation, ATD for discontinuous processes