Technical Details of the optris CTlaser LT / LTF

Measurement Specifications

• Temperature range (scalable via software):  -50°C … 975°C
• Spectral range: 8 – 14 µm
• Optical resolution (90% energy):
  75:1 CTlaser LT
  50:1 CTlaser LTF
• Selectable focus (CT laser)¹⁾:CF1 0.9mm @ 70 mm
  CF2 1.9 mm @ 150 mm
  CF3 2.75 mm @ 200 mm
  CF4 5.9 mm @ 450 mm
  SF 16 mm @ 1260 mm
• System accuracy (at T_amb= 23 ± 5°C):±1% or ±1°C^2),3)(CTlaser LT)
  ±1.5% or ±1.5°C^2),3) (CTlaser LTF)
• Repeatability (at T_amb = 23 ± 5°C):±0.5 % or ±0.5°C²⁾ (CTlaser LT)
  ±1 % or ±1°C²⁾ (CTlaser LTF)
• Temperature resolution (NETD):
  0.1 K (CTlaser LT)
  0.5 K (CTlaser LTF)
• Response time (90% signal)⁴⁾:
  9 ms (CTlaser LTF)
  120 ms (CTlaser LT)
• Emissivity / Gain (adjustable via programming keys or software): 0.100 – 1.100
• Transmissivity / Gain (adjustable via programming keys or software): 0.100 – 1.000
• Signal processing (parameter adjustable via software):
  peak hold, valley hold, average, extended hold function with threshold and hysteresis

General Specifications

• Environmental rating: IP 65 (NEMA-4)
• Ambient temperature:
  sensing head: -20°C … 85°C (50°C with laser ON)
  electronics: 0°C … 85°C
• Storage temperature:
  sensing head: -40°C … 85°C
  electronics: -40°C … 85°C
• Relative humidity: 10 – 95%, non condensing
• Vibration: IEC 60068-2-6 (sinus shaped), IEC 60068-2-64 (broadband noise)
• Shock: IEC 60068-2-27 (25G and 50G)
• Weight:
  sensing head: 600 g
  electronics: 420 g

Electrical Specifications

• Outputs / analog:
  channel 1: 0/4 – 20 mA, 0 – 5/10 V, thermocouple J, K
  channel 2: sensing head temperature (-40 – 85°C as 0 – 5 V or 0 – 10 V), alarm output
• Output / alarm: 0-30 V/50 mA (open collector)
• Optional: relay: 2 x 60 V DC/42 V AC_eff; 0.4 A; optically isolated
• Outputs/ digital (optional): USB, RS232, RS485, Modbus RTU, Profibus DP, Ethernet
• Output impedances:
  mA max. 500 Ω (with 5 – 36 V DC)
  mV min. 100 kΩ load impedance
  thermocouple 20 Ω
• Inputs: programmable functional inputs for external emissivity adjustment, ambient temperature compensation, trigger (reset of hold functions)
• Cable length: 3 m (standard), 8 m, 15 m
• Power supply: 8-36 V DC
• Current draw: max. 160 mA
• Laser 635 nm: 1mW, ON/OFF via electronic box or software

Versions

Part number: temperature range / spectral range / optics / response time

• OPTCTLLT: -50-975°C / 8 – 14 μm / 75:1 / 120 ms
• OPTCTLLTF: -50-975°C / 8 – 14 μm / 50:1 / 9 ms

¹⁾ different spotsizes for CTlaser LTF (D:S = 50:1)
²⁾ whichever is greater
³⁾ at object temperatures >0°C, =1
⁴⁾ with dynamic adaption at low signal levels

Areas of application for the IR thermometer optris CTlaser LT /LTF

The two-part infrared thermometer optris CTlaser LT has been designed for universal temperature measuring employments of up to 975°C. Research and development facilities relying on valid measuring data as well as machine and system producers favor the use of this device.

The high-performance laser of the pyrometer is perfectly suited for temperature measurement of non-metallic surfaces. Among others, this includes materials like plastics, varnishes, wood, or paper. The IR thermometer is employed for e.g. temperature control during welding of plastic components as well as in testing stations in the automobile industry.

The CTlaser LTF, recognizing temperature changes within only 9 ms, has been designed for especially quick measurements and thus ensures a thorough temperature surveillance of fast processes.

Infrared software optris Compact Connect included

The temperature analysis software optris Compact Connect has been developed specifically for the extensive documentation and analysis of temperature measurement data of our stationary infrared thermometers. It is license-free and included in every pyrometer shipment.