Resistance pyrometer CellaTemp® PA 20

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Overview:
The CellaTemp® PA 20 is a digital pyrometer for temperature measurement from 250 to 2,500 °C. Its wide measuring span and interchangeable, focusable optics make it suitable for diverse industrial applications. Sighting is available via through-the-lens view, laser pilot light or optional video camera. Parameters such as emissivity, measuring range and smoothing constants are adjustable via rear buttons and shown on the LED display. In normal operation the current measurement is displayed.

Key features:

• Measuring range: 250–2,500 °C (segmented)
• Focusable, interchangeable lenses for precise distance adjustment
• Broadband anti-reflective precision optics
• 4-digit LED display readable at distance
• Test current output for diagnostic checks
• Standard interfaces: digital I/O, two analogue outputs, USB and RS485

Measurement parameters (summary):
Sensor: photodiode
Spectral range: 1.1–1.7 µm
Response time t98: ≤ 50 ms (T > 250 °C); ≤ 2 ms (T > 750 °C)
Measurement uncertainty: 0.3% of reading (min. 4 K)
Repeatability: 1 K
Resolution (interface/display/current): 0.1 K / 1 K / 0.2 K + 0.03% of range

Optical variants & lenses:

• Standard lens PZ 20.01: focus 0.4 m – ∞
• Close-up lens PZ 20.03: focus 0.2 m – 0.4 m
• Wide-angle lens PZ 20.05: focus 0.2 m – ∞
• Telephoto I PZ 20.06: focus 1.2 m – ∞
• Telephoto II PA 20.06: focus 0.6 m – ∞

Optical field / example measuring fields:
Example measuring field diameters are provided for various distances (e.g. at 400 mm distance the field diameter is 2.29 mm).

Electrical parameters:
Analogue output: 0(4)–20 mA, linear, switchable, scalable; Resistance ≤ 500 Ω
Analogue input: 0–10 V
Switching outputs: 2 × open collector 24 V DC, ≤ 30 mA
Switching inputs: 2 × up to 24 V
Interfaces: USB, RS485
Power supply: 24 V DC (+10% / -20%); Current consumption ≤ 175 mA

Camera (for camera models):
Video output: Composite PAL, 1 Vpp, 75 Ω

Display & controls:
4-digit red LED display (digit height 8 mm); Status LEDs: 2; Control: 3 buttons

Functions:

• Sighting options: through-the-lens, laser pilot light, video camera
• Diagnostic/test current output and simulation of measured values
• ATD (Automatic Temperature Detection) for discontinuous processes

Adjustable parameters (selection):
Measuring range; Emissivity; Transmittance; Smoothing filter; Alarm limits and modes; ATD parameters (optional); Linearization; Simulation; Unit °C/°F; Camera functions: TBC, white balance

General parameters:
Connection: M12 8-pin; Ambient temperature: 0–65 °C; Storage: -20–+80 °C; Humidity: ≤ 95% r.H. 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

Scope of delivery:

• Pyrometer CellaTemp PA
• 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)
• Software CellaView
• Quick manual

Software:
CellaView

Technical specifications:

• Model: CellaTemp® PA 20
• Measuring range: 250–2,500 °C
• Spectral range: 1.1–1.7 µm
• Response time: ≤ 50 ms / ≤ 2 ms
• Uncertainty: 0.3% of reading (min. 4 K)
• Analogue output: 0(4)-20 mA; Interfaces: USB, RS485
• Power supply: 24 V DC; Current ≤ 175 mA
• Protection class: IP65; Housing: Stainless steel V2A
• Dimensions/Weight: Ø 65 mm × 220 mm (max. 277 mm) / approx. 0.9 kg