CTratio 2M

The Optris CTratio 2M emerges as a rugged and reliable fiber-optical ratio thermometer, meticulously engineered for precise non-contact temperature measurement across a broad range of high temperatures, spanning from 250 °C to 3000 °C (482 °F to 5432 °F). This advanced instrument offers versatility and accuracy, catering to various measurement requirements through its three distinct models: 2ML, 2MH, and 2MH1. Leveraging the robust fiber-optical two-color technology, the CTratio 2M delivers consistent and repeatable temperature measurement results, thanks to the pyrometers innovative ratio measurement principle.

Unlike conventional single-color pyrometers that rely solely on intensity measurements, the CTratio harnesses the power of dual-color or two-color pyrometry. By measuring infrared radiation at two closely spaced wavelengths and evaluating the relationship between these intensities, the CTratio ensures accurate and reliable measurements even in adverse conditions. This approach proves invaluable in scenarios where emissivity is unknown or changes with temperature, as the infrared sensor accounts for variations in emissivity or process conditions proportionally across both wavelength signals.

Moreover, the CTratio’s resilience extends to challenging environments where obstacles like dust, smoke, or steam may be present in the optical path. With the ability to maintain reliability even with up to 90 percent attenuation caused by changing transmissions, this pyrometer remains a dependable tool in industrial settings. The infrared thermometers resistance to adverse conditions, coupled with precise temperature measurements, makes this infrared sensor indispensable across a wide range of applications.

Aligning the sensor for optimal performance is effortless with the CTratio 2M, thanks to its integrated green laser, providing real-time spot size indication at any distance. This feature simplifies sensor alignment, even on surfaces emitting intense red glow. Additionally, the motorized focus capability allows for adjustable focusing from 150 mm (5.9 in) to infinity, ensuring versatility in targeting objects at various distances.

The temperature measurement ranges offered by the CTratio 2M cater to diverse industrial needs, with each model tailored to specific temperature ranges for both single-channel and dual-channel operation. This flexibility, combined with the pyrometers high system accuracy and repeatability, ensures consistent and reliable performance in demanding industrial environments.

Safety and durability are paramount considerations in industrial settings, and the CTratio 2M addresses these concerns admirably. Featuring an electrically isolated sensing head and a rugged stainless-steel housing, this pyrometer prioritizes safety and reliability, making it suitable for the most challenging applications.

Manufactured in Germany, the CTratio 2M exemplifies precision engineering and uncompromising quality. The infrared thermometers adaptability, durability, and accuracy position it as the preferred choice for critical temperature control in industries such as metal and semiconductor manufacturing. With comprehensive support for various analog and digital outputs, seamless integration into industrial processes is assured.

In conclusion, the Optris CTratio 2M sets the standard for non-contact temperature sensing technology, offering unmatched accuracy, reliability, and versatility. Designed to excel in demanding industrial environments, this infrared pyrometer is the go-to solution for precise thermal monitoring across a wide range of applications.

The Optris CompactPlus Connect software is a comprehensive tool for temperature measurement and analysis in industrial and research environments utilizing Optris infrared pyrometers. It provides a user-friendly interface facilitating smooth communication with Optris pyrometers.Enhancing the capabilities of Optris fixed infrared pyrometers, the CompactPlus Connect software extends beyond basic temperature measurement, offering various monitoring, analysis, and control features. These include visualizing temperature trends with temperature-time diagrams and documentation. Notably, it enables advanced data analysis, data logging, automatic process controls, parameterization of the pyrometer via configuration settings, and programming of outputs and inputs. Additionally, it offers advanced signal-processing functionalities.Overall, the Optris CompactPlus Connect software offers a robust solution for thermal measurement applications, providing versatility, efficiency, and ease of use for professionals in diverse industries. CompactPlus Connect The Optris IR mobile allows users to set up and commission an Optris infrared pyrometer or infrared camera with an Android smartphone or tablet. This tool becomes handy for commissioning and aligning the infrared cameras field of view or adjusting the configuration. The app analyzes the connected infrared cameras live infrared image stream with auto hot and cold spot detection. For pyrometers, a temperature-time diagram or the video signal is displayed. This app works on most Android devices running 5.0+ with a USB port supporting USB-OTG (On The Go). Google Play

How do I focus the CTratio?

The CTratio pyrometer is equipped with a vario optics. This enables you to focus the device from a distance of 300 mm to infinity. To focus the sensor, loosen the knurled screw on the head. Now you can focus the device on the passive infrared sensor head. After alignment, tighten the knurled screw. This secures the focus. By turning the rotary button clockwise you will change the focus in direction far. By turning counterclockwise you will change the focus in direction close.

How do I connect or disconnect the fiber optical cable?

When mechanically connecting the fiber to the sensor head and the electronics box, the correct pairing must be ensured. Both connections are labeled with the corresponding side (“Head” and “Box”). To connect the fiber correctly, plug the cable into the device and turn the fiber until it locks into place. Then fix the cable with the knurled screw Never pull on the fiber. This can damage and destroy the fiber. When removing the fiber, the screw connection must be loosened first.

What is the bending radius on the fiber?

Please make sure that the minimum bending radius of the fiber optics is 29 mm (1.14 in) for 2MH/2MH1, and 80 mm (3.15 in) for 2ML will be considered during installation.

What do you do if the fiber is broken?

The device must be sent in if the fiber or measuring head is defective. A recalibration is necessary.

How to replace the fiber-optical cable?

For a fast field exchange max. two spare fibers of the same length including optical sensing head can be ordered together with the main CTratio unit. As they will be adjusted together with the CTratio a subsequent order of spare fibers is not possible.

How do I aim with a CTratio?

The integrated laser sighting supports the alignment and focusing of the optics. The size of the laser dot is equal to the real measurement spot size at any distance.

Is the laser dangerous?

The pyrometers laser is a class 2 laser with less than 2MW in the wavelength range of 500 nm to 650nm, according to EN 60825 1:2014. Do not point the laser directly at the eyes of persons or animals! Do not stare into the laser beam. Avoid indirect exposure via reflective surfaces.

Does the laser switch off?

At ambient temperatures >50 °C (>122 °F) the laser will be switched off automatically. The laser should only be used for sighting and positioning of the sensor. A permanent use of the laser can reduce the lifetime of the laser diodes and might heat up the sensor.

Can I trigger the laser externally?

Yes, but the supply line for the sighting laser must be led via a switch or pushbutton, which has to be installed max 2m away from installation site of the sensor for safety purposes. The laser can be activated/ deactivated via this, by the user on site to be installed switch, or via the software.

Can I use the CTratio as a 2-wire sensor?

Please do not connect a supply voltage to the analog outputs, as this will destroy the output. The CTratio is not a 2-wire sensor. Please review the CSmicro series, as this is a two-wire sensor.

Can I use the USB interface permanently?

The USB socket built into the side is only intended for setting up the sensor and any subsequent changes to the settings. Permanently plugging and unplugging the USB cable can cause damage. The USB interface is not designed for continuous use. For this purpose, please use the optionally available USB interface ACCTMIAC.

How can I improve the noise amplitude of the sensor?

In the CT models, the head cable must not be moved during the measurement. Use shielded cables only. The sensor shield has to be grounded. Avoid ground loops and related signal interferences in industrial environments. It might be necessary to interrupt the ground connections inside the electronics box. To do this, switch the jumper inside the electronics box to another position. Review the manual.

• CTratio
• 1x mounting nut
• 1x mounting bracket
• USB-C cable 1 m (3.3 ft) (incl. adapter for USB-A)
• CTratio Manual