Optical pyrometer CellaCast PA 81

LEDRS485USB

Product overview:
The CellaCast PA 81 is a two-colour pyrometer designed for non-contact temperature measurement of liquid metals in casting channels, transfer ladles and pouring ladles. It features a separate optical measuring head and a fibre-optic cable that are immune to electromagnetic interference and usable up to 250 °C ambient temperature without cooling, making the system suitable for confined or difficult-to-access installation points.

Special features:

• Measuring range 800 to 2,400 °C
• Wear-free, maintenance-free measuring system for melting and holding furnaces, cupolas and blast furnaces
• ATD function for filtering the temperature of slag-free and oxide-free metal surfaces
• Two-colour measuring method for interference-free readings in dust and vapour
• High-resolution optics for reliable measurement at long distances
• Measuring head and fibre-optic cable heat resistant up to 250 °C

Key properties / Version data:
Measuring range: 800 - 2400 °C
Focus distance: 0.2 m - ∞
Sighting option: Laser pilot light
Measuring field shape: round
Distance ratio: 190 : 1
Measuring head (standard): PA 41.01
Measuring principle: two-colour

Measurement parameters:
Measuring range: 800 - 2400 °C
Sensor: Double photodiode
Spectral range: 0.95 / 1.05 µm
Response time t98: ≤ 20 ms (T > 950 °C)
Measurement uncertainty: 1.5 % of temperature reading [°C]
Repeatability: 3 K
Temperature coefficient: 0.05 %/K
Resolution current output: 0.2 K + 0.03 % of selected range
Resolution interface: 0.1 K
Resolution display: 1 K

Optical variants:
Measuring heads: PA 41.01 (M30): Focusing 0.2 m - ∞

Electrical parameters:
Analog output: 0(4) - 20 mA linear, switchable, scalable (≤ 500 Ω)
Analog input: 0 - 10 V
Switching outputs: 2 x Open Collector 24 V DC, ≤ 30 mA
Switching inputs: 2 x up to 24 V
Interface: USB, RS 485
Power supply: 24 V DC +10 % / -20 %
Current consumption: ≤ 175 mA (24 V DC)

Features:
Sighting option: Laser pilot light
Display: 4-digit red LED, digit height 8 mm
Status display: 2 x LED
Control elements: 3 buttons

General parameters:
Connection: M12 thread 8-pin
Ambient temperature: Electronics 0 - 65 °C; Measuring head up to 250 °C
Storage temperature: -20 - +80 °C
Permissible humidity: 95 % r.H. max. (non-condensing)
Dimensions: Electronics Ø 65 mm x 187 mm; Measuring head depending on type
Housing: Stainless steel V2A (1.4305)
Protection class: IP 65 (DIN 40050)
Weight: approx. 0.9 kg

Adjustable parameters:

• Measuring range and measured variable
• Scale of analogue input and output signals
• Smoothing filter and memory operation mode
• Hold time of memory
• Emissivity and transmittance
• Compensation of reflected ambient radiation
• Limits and operating mode of alarm contacts
• Parameters of the ATD function and linearization
• Status display configuration and simulation of current/temperature
• Temperature unit °C/°F
• Measurement channel selection: two-colour, single-colour 1, single-colour 2
• Threshold level of contamination monitoring

Functions:

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

Scope of delivery:

• Pyrometer CellaCast PA
• Connection cable VK 02/A (5 m)
• Measuring head
• USB cable VK 11/D (1.8 m)
• Software CellaView
• Short manual
• * Fibre-optic cable must be ordered separately

Software:
CellaView

Technical specifications:

• Model: CellaCast PA 81
• Measuring range: 800 - 2400 °C
• Spectral range: 0.95 / 1.05 µm
• Response time (t98): ≤ 20 ms (T > 950 °C)
• Accuracy: 1.5 % of temperature reading
• Repeatability: 3 K
• Distance ratio: 190 : 1
• Focus distance: 0.2 m - ∞
• Measuring head: PA 41.01
• Measuring principle: Two-colour
• Analog output: 0(4) - 20 mA
• Interfaces: USB, RS 485
• Power supply: 24 V DC (+10 % / -20 %)
• Operating ambient temperature (electronics): 0 - 65 °C; measuring head up to 250 °C
• Housing: Stainless steel V2A (1.4305)
• Protection class: IP65
• Weight: approx. 0.9 kg
• Included software: CellaView