FR

Description

Marathon FR fiber optic ratio thermometer accurately measures targets that are: obstructed by smoke, steam, particulates, or smaller than the instrument field of view or located within strong electromagnetic fields.This pyrometer consists of a rugged fiber optic cable plus optical head assembly connected to a housing. The housing contains a detector, processing electronics, internal user interface/LED display, and termination connections for field wiring.

  • Field-replaceable fiber cable
  • 1-color and 2-color operation
  • Patented “Dirty Window” alarm
  • Simultaneous analog and digital outputs
  • Laser Aiming available (selected models only)
  • Fiber cable rated to 315ºC (600ºF) available
  • Field calibration software
  • Windows® DataTemp® software for data acquisition, display and analysis

Measurement

Models                                              

FR1A                                                   

FR1B        

FR1C        

Temperature Ranges

500º to 1100°C (932º to 2012°F)

700º to 1500°C (1292º to 2732°F)

1000º to 2500°C (1832º to 4532°F)

Detector      

Si/Si-layered detector, 1 μm

Fiber Cable Lengths

1m (3’), 3m (10’), 6m (19’), and 10m (32’); consult factory for other lengths.

Accuracy

No attenuation

Up to 95% attenuation

Up to 95% attenuation

 

± (0.3% Tmeas +2°C); Tmeas in ºC

± (1% Tmeas +2°C), FR1A and FR1B

± (1.3% Tmeas +2°C), FR1C

Repeatability

±1°C

Temperature Resolution    

 ±1°C or °F

Response Time  

10 mSec; averaging selectable to 10 sec

Emissivity (one-color)

0.1 to 1.0 in 0.01 increments

Slope (two-color)      

0.085 to 1.150 in 0.001 increments

Signal Processing 

Peak Hold, Averaging, Advanced Peak Hold

 

Optical:

Models                                           

      D:S*

                          Focus Distance

CF1    

CF2      

SF0

FR1A**       

20

 100 mm (4 in)

300 mm (12 in)

FR1B**   

40

100 mm (4 in)

300 mm (12 in)

FR1C  

65

100 mm (4 in)

300 mm (12 in)

 *At 90% energy                   CF=close focus; SF=standard focus

** Available with laser aiming

Electrical

Outputs                         

0/4–20 mA; RS-485, 2-wire/4-wire, networkable to

32 sensors; Relay (SPST 48V, 300 mA, response  time < 2 mSec)

Power Requirements 

24 VDC, 500 mA, ±20%

Compliance     

CE low voltage directive; EN 61326

 

General:

Environmental Rating                                  

NEMA-4 (IEC 529, IP 65)

Ambient Temperature

Electronics housing

With water cooling option

Fiber cable/Optical head   

Air Purge 

 

0º to 60°C (32º to 140°F)

0º to 150ºC (32º to 300ºF);

2 l (0.5 gal) per minute 16ºC (62ºF)

0º to 200°C (32º to 392°F); standard temperature rating

0º to 315ºC (32º to 600ºF); high temperature option

0.5 to 1.5 l/sec (1-3 CFM)

Storage Temperature

Electronics housing

 

-20º to 70°C (-4º to 158°F)

Relative Humidity

10% to 95% non-condensing

Shock

(Electronics Housing)   

 

MIL-STD-810D (IEC 68-2-27)

Vibration

(Electronics Housing) 

 

 MIL-STD-810D (IEC 68-2-6)

Weight

Electronics Housing   

Optical Head

 

0.71 kg (25 oz)

0.10 kg (3 oz)

Cable protection

Rated to 200°C; stainless steel armor; Viton coating rubber “boot”, and NEMA-4 (not available on high temperature cable); provision for conduit to protect  fiber cable                                                   

 

  • Cement
  • Steel
  • Power
  • Pulp & Paper
  • Plastic

 

Fields marked with * are mandatory fields.

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