Shortwave infrared spot CellaCrystal PA 64

Product description:
The CellaCrystal PA 64 is engineered for optical temperature measurement during crystal growth in plasma-assisted CVD processes. Its two-colour measuring method and selected spectral range reduce plasma influence on the signal. With a constant resolution of < 0.1 K across the measuring range and excellent long-term stability, the instrument delivers the precision required for process control. Alignment to the measuring point is facilitated by through-the-lens sighting, laser pilot light or an optional video camera.

Special features:

• Measuring range 500 - 1,400 °C
• Variant for plasma-assisted CVD (PA 485 AF 1)
• Continuous-light two-colour measurement
• No rotating filters
• Minimal self-heating for high long-term stability
• Focusable optics for precise measuring distance
• Standard analogue output plus USB and RS-485 interfaces

Measurement parameters:

• Measuring range: 500 - 1400 °C
• Sensor: double photodiode
• Spectral range: 1.50 / 1.90 μm
• Response time (t98): ≤ 30 ms
• Measurement uncertainty: 0.75 % of reading (min. 4 K)
• Repeatability: 2 K
• Temperature coefficient: 0.05 %/K
• Resolution current output: 0.2 K + 0.03 % of selected span
• Resolution interface: 0.1 K
• Resolution display: 1 K

Optical variants:

• Close-up lens PZ 20.03: focusing 0.2 m - 0.4 m (example AF 2)
• Typical distance ratio (AF 2): 75 : 1

Electrical parameters:

• Analog output: 0(4) - 20 mA linear, switchable, scalable
• Output resistance: ≤ 500 Ω
• Analog input: 0 - 10 V
• Switching outputs: 2 × Open Collector 24 V DC, ≤ 30 mA
• Switching inputs: 2 × to 24 V
• Interfaces: USB, RS-485
• Power supply: 24 V DC (+10 % / -20 %)
• Current consumption: ≤ 175 mA at 24 V DC

Video camera (optional):

• Video output: Composite PAL, 1 Vpp, 75 Ω

Equipment / Display / Controls:

• Sighting: through-the-lens sighting / laser pilot light / video camera (variants)
• Display: 4 × 7-seg LED red, digit height 8 mm
• Status indicators: 2 × LED
• Operator controls: 3 pushbuttons

General parameters:

• Connection: M12 screw connection, 8-pin
• Ambient temperature (operation): 0 - 65 °C
• Storage temperature: -20 - +80 °C
• Permissible humidity: 95 % RH max. (non-condensing)
• Dimensions: Ø 65 mm × 220 mm (max. 277 mm)
• Housing: stainless steel V2A (1.4305)
• Protection class: IP65 (DIN 40050)
• Weight: approx. 0.9 kg

Adjustable parameters:

• Measuring range; measured variable and scaling of analogue I/O
• Smoothing filter; memory mode and hold time
• Emissivity; transmittance; background radiation compensation
• Alarm limit values and operating mode
• ATD parameters (optional); linearization; LED status display
• Simulation of current and temperature; unit °C/°F
• Measuring channel selection: two-colour, one-colour 1, one-colour 2
• Contamination monitoring threshold; camera: TBC and white balance

Functions:

• Overtemperature signal: internal temperature > 80 °C outputs > 20.5 mA on analogue output
• Service function: simulation of measured value or current signal
• ATD (Automatic Temperature Detection): automatic detection for discontinuous processes

Scope of delivery (typical):

• Pyrometer CellaTemp PA
• Connection cable VK 02/A (5 m)
• Video cable VK 02/F (5 m) for models with camera
• USB cable VK 11/D (1.8 m)
• CellaView software
• Short operating manual

Software:

• CellaView (configuration and evaluation)

Technical specifications:

• Model: CellaCrystal PA 64
• Measuring range: 500 – 1,400 °C
• Measuring principle: two-colour
• Spectral range: 1.50 / 1.90 μm
• Sensor: double photodiode
• Response time t98: ≤ 30 ms
• Measurement uncertainty: 0.75 % of reading (min. 4 K)
• Repeatability: 2 K
• Resolution display/interface/current output: 1 K / 0.1 K / 0.2 K + 0.03 % span
• Focal example: Close-up lens PZ 20.03 (0.2 - 0.4 m); distance ratio up to 75:1 (AF 2)
• Analog output: 0(4)–20 mA; Interfaces: USB, RS-485
• Power supply: 24 V DC (+10 % / -20 %); current consumption ≤ 175 mA
• Protection class: IP65; Housing: stainless steel V2A
• Dimensions: Ø 65 mm × 220 mm (max. 277 mm); Weight ≈ 0.9 kg