EM301 Heating Microscope Technical Data

Comparison of the heating microscope models

EM301-M16EM301-M17
FurnaceM16 (HT-16)M17 (HT-19L)
Max. furnace temperature1600 °C1700 °C
Max. specimen temperature 1500 °C1600 °C
Max. heating rate≤ 80 K/min up to 1400 °C
≤ 50 K/min above 1400 °C
≤ 80 K/min up to 1400 °C
≤ 50 K/min up to 1600 °C
≤ 10 K/min above 1600 °C
Heating conductorMolybdenum disilicide (MoSi2)Molybdenum disilicide (MoSi2)

Working tube
… Material
… Installation
… Inner diameter
… Length 


≤ 99,7 % Al2O3
Removable
20 mm
180 mm


≤ 99,7 % Al2O3
Removable
20 mm
180 mm
All features not mentioned in this table are identical for all models of the heating microscope. This applies to the software as well as the optical bench with camera, objective and lamp, the furnace control and the measurement chain of the specimen temperature (see brochure and respective data sheets).

Optical bench

Optical bench
Components
  • Base plate
  • Precision rail with height adjustable stands 
  • Needle valve and flow sensor for the water cooling system  
Dimensions
  • Base plate with feet: 140 cm x 40 cm x 8 cm (L x W x H)
  • Precision rail: length 120 cm  
  • Base plate with feet and stands: total height approx. 47 cm 
Material of precision rail and standsAluminum, anodized
Lamp
Components
  • Halogen bulb and condenser
  • Specially designed supply unit
Furnace carrier, specimen carriage and furnace closures
Compatible furnacesM16 (HT-16), M17 (HT-19)
Furnace gas atmospheresFurnace closures are designed for the following atmospheres:
  • Reducing according to standard ²
  • Oxidizing according to standard ²
  • Other gases  
Furnace closures
  • Water-cooled
  • Equipped with optically pure quartz glass disc  
Specimen holder
  • Material: Al2O3, resistant against thermal shock and high temperatures
  • Size of the supporting area for the substrate approx. 5 x 18 mm
  • Contains the specimen thermocouple
Position of the specimen thermocouple
  • Position of the measuring junction approx. 3 mm beneath the specimen
  • Protected against contamination by the enclosing specimen holder
Substrate sizeTypical: 10 mm x 12 mm (L x W)  maximum: 14 mm x 16 mm (L x W)
Specimen
  • Shape: Depending on material and task, e.g. cylinder or truncated cone ²)
  • Dimensions: typical: cylinder with H = W = 3 mm  maximum: H = 6 mm, W = 8 mm 
²) According to the following standards: DIN 51730, ISO 540, CEN/TS 15370-1 und CEN/TR 15404
Camera and lens
CameraCCD camera - black and white
LensSpecial macro lens
Magnification 4)Typische Vergrößerung: Typical magnification: width of the image: 9 mm with a specimen width of 3 mm (Wspecimen = 1/3 Wimage)
ResolutionDepending on the adjusted magnification and specimen size
  • Length: < 0,1 % of the relative specimen width or height
  • Area: < 0,1 % of the relative projected area of the specimen
  • Angle: < 1°
4) Refers to the information that is stored on the camera chip

Furnace system

FurnacesTube furnace M16Tube furnace M17
Furnace dimensions
… Diameter
… Length without working tube
… Length with working tube

100 mm
140 mm
180 mm


100 mm
140 mm
180 mm

Working tube
… Material
… Installation
… Inner diameter
… Length

≥ 99,7 % Al2O3
Removable
20 mm
180 mm

≥ 99,7 % Al2O3
Removable
20 mm
180 mm

Heating conductor materialMolybdenum disilicide (MoSi2)Molybdenum disilicide (MoSi2)
Max. furnace temperature 1600 °C1700 °C
Max. specimen temperatureca. 1500 °Cca. 1600 °C
Max. heating rates
  • ≤ 80 K/min up to 1400 °C
  • ≤ 50 K/min above 1400 °C
  • ≤ 80 K/min up to 1400 °C
  • ≤ 50 K/min up to 1600 °C
  • ≤ 10 K/min above 1600 °C
Compatibility with Leitz / LeicaCompatible with heating microscopes from Leitz / Leica.
Furnace control 
Furnace control models
  • EPA-6 for furnace M16 (HT-16)
  • EPA-8 for furnaces  M17 (HT-19L)
Components
  • Transformer in separate casing
  • Thyristor controller
  • Program controller
  • Temperature acquisition device 
  • Over-temperature protection unit 
  • Water flow control
  • Working hour meter
  • Fuses
Over-temperature protectionClosed control circuit with separate thermocouple
Water flow control
  • Load of the furnace heating conductor can only be switched on, if the sensor detects water flow
Working hour meterIntegrated into the furnace control
Fuses
  • GFCI for fault current
  • Main fuse
  • Fuse for control electronics
Current limitation for heating conductoradjustable
Displays
  • Specimen temperature (measured value of the specimen thermocouple)
  • … Furnace temperature: nominal value (target value of the heating program), real value (temperature measured at the heating conductor)
Display reading precision1 K
Measurement chain of the specimen temperature
Thermocouple types
  • EPA-6: thermocouple type S
  • EPA-8: thermocouple type B
Position of the thermocoupleInside of the specimen holder, directly underneath the test piece
Signal processing
  • Cold junction compensation
  • Digitization
  • Linearization
Measurement uncertaintyStandard measurement uncertainty u(T) ≤ 5 K

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