Intergrated Ratio Thermometer
Marathon Integrated Ratio Thermometers (MR1S) use two-colour measurement to provide superior accuracy in high temperature applications. These integrated units offer an advanced electro-optical design, smart digital electronics, and built-in user interface - all combined in a rugged compact housing. MR1S thermometers are ideal for situations where the target may be obstructed due to atmospheric smoke or other particulates where the target is moving, or smaller than the field-of-view.
Marathon Integrated Ratio Thermometers are distinguished by a unique Raytek feature called "Two colours. Two Ways." With this feature you can switch between two colour and one colour operation which simplifies setup and provides continued measurement flexibility. The second meaning of "Two colours. Two Ways" is bi-directional RS485 serial communications link between teh sensor on the factory floor and and a pc in the control room. This enables remote setup, monitoring, calibration, and maintenance - especially valuable when sensors are installed in hard-to-reach locations.
At the heart of all Marathon Series thermometers are high-speed digital signal processors (DSP). These processor chips support smart operations and allow downloading of propriety sensor and algorithms and upgrades, extending the performance of the sensor.
Highlights
- Compact, rugged design, NEMA-4 rated
- One- or two-colour operation (unique feature)
- Fast response time down to 10 mSec
- Superior optical resolution to 130:1
- High speed digital signal processor supports smart operation
- Bi-directional RS-485 communications (networkable)
- Supports up to 32 Marathon Series sensors in a single multidrop network
- Programmable relay output (temperature setpoint or "fail safe")
- Standard- and close-focus versions available
- Variable-focus optics and built-in interface and display simplify installation
- Through-the-lens sightingSimultaneous analog and digital output with user-defined alarms
- Ambient temperatures to 315°C (600°F) with ThermoJacket® enclosure
- Unique "dirty window" alarm
- Field Calibration and sensor diagnostics software
- Optional Marathon DataTemp® software for remote configuration and monitoring
| Measurement Specifications | |
|---|---|
|
Temperature Ranges MR1SA MR1SB MR1SC |
600 - 1400°C (1100 - 2500°F) 700 - 1800°C (1290 - 3270°F) 1000 - 3000°C (1830 - 5430°F) |
| Detector | Si/Si Layered Detector |
| Accuracy | ±1.75% full scale |
| Repeatability | ±0.3% full scale |
| Temperature Resolution | 1°C or F |
| Response Time | 10 mSec (95% response) |
| Emissivity (one-colour) | 0.10 to 1.0 in 0.01 increments |
| Slope (two-colour) | 0.85 to 1.150 in 0.001 increments |
| Signal Processing | Peak Hold and averaging |
| Electrical Specifications | |
|---|---|
| Outputs | 4-20mA; RS-485;Relay |
| Power Supply | 24 VDC, 500mA, ±20% |
| Environmental Rating | IP 65 (IEC 529), NEMA-4 |
| General Specifications | |
|---|---|
| Ambient Temp Range: | |
| Without cooling | 0-50°C (32-120°F) |
| With air cooling | 0-120°C (32-250°F) |
| With water cooling | 0-175°C (32-350°F) |
| With ThermoJacket | 0-315°C (32-600°F) |
| Relative Humidity | 10% to 95% non-condensing |
