EM301 Heating Microscope Technical Data

EM301 Heating Microscope Technical Data

  • Comparison of the heating microscope models
  • Optical bench
  • Furnace system

EM301-M16

EM301-M17

Furnace

  • M16 (HT-16)

  • M17 (HT-19L)

Max. furnace temperature

  • 1600 °C

  • 1700 °C

Max. specimen temperature

  • 1500 °C

  • 1600 °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 conductor

  • Molybdenum 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

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 stands

  • Aluminum, anodized

Lamp

Components

  • Halogen bulb and condenser

  • Specially designed supply unit

Furnace carrier, specimen carriage and furnace closures

Compatible furnaces

  • M16 (HT-16), M17 (HT-19)

Furnace gas atmospheres

Furnace 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, esistant 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 size

  • Typical: 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 ¹

  • Dimensions: typical: cylinder with H = W = 3 mm  maximum: H = 6 mm, W = 8 mm  

¹ According to the following standards: DIN 51730, ISO 540, CEN/TS 15370-1 und CEN/TR 15404

Camera and lens

Camera

  • CCD camera - black and white

Lens

  • Special macro lens

Magnification ²

  • Typical magnification: width of the image: 9 mm with a specimen width of 3 mm (Wspecimen = 1/3 Wimage)

Resolution

Depending 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°

² Refers to the information that is stored on the camera chip

Furnaces

Tube furnace M16

Tube 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 material

  • Molybdenum disilicide (MoSi₂)

  • Molybdenum disilicide (MoSi₂)

Max. furnace temperature

  • 1600 °C

  • 1700 °C

Max. specimen temperature

  • ca. 1500 °C

  • ca. 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 / Leica

  • Compatible 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 protection

  • Closed 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 meter

  • Integrated into the furnace control

Fuses

  • GFCI for fault current

  • Main fuse

  • Fuse for control electronics

Current limitation for heating conductor

  • adjustable

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 precision

  • 1 K

Measurement chain of the specimen temperature

Thermocouple types

  • EPA-6: thermocouple type S

  • EPA-8: thermocouple type B

Position of the thermocouple

  • Inside of the specimen holder, directly underneath the test piece

Signal processing

  • Cold junction compensation

  • Digitization

  • Linearization

Measurement uncertainty

  • Standard measurement uncertainty u(T) ≤ 5 K