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General
Standard Thermocouples – Angle Type are used primarily for temperature measurement and control in salt baths and metal melts at a temperature range of 200 ° C to 1350 ° C is used. The angular shape object that the connector head of the thermocouple is not directly above the bathroom mirror, and that's not the high temperatures or is exposed to corrosive fumes.
Structure and types of election
To the function of a thermocouple over a reasonable period to ensure the materials for thermal couple protection tube and connector head to the operating conditions are selected.
General advice on thermo couple and protective pipe materials can be found in DIN 43712, DIN 43720.
Temperatures are recommended for use in air (unless otherwise noted). Short-term exceedances of these temperatures are acceptable, however, shorten the lifespan.
Thermo-couple standards
The thermocouple voltages are
· DIN IEC 584 Tolerance Class 1 or
· DIN 43710
Attention:
For the thermocouple Fe-CuNi couple of new plants is just the type J according to DIN IEC 584 permitted. The core values differ from the previous type L according to DIN 43710, which is only to replace existing measuring systems to be used.
Protection tubes
For the selection of the protection tube material, the temperature and the corrosive properties of salt and metal melts determined. The permissible operating temperature can be less than or greater than when operating in air.
Recommended protective pipe materials for salt melts
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Tenifer
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bis 600 °C
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Titan NT
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Salpeter-, clorid- und cyanidhaltige
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bis 1000 °C
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Eisen
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Glüh-, Anlaß- und Härtebäder
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bis 1350 °C
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Eisen / Stahl SL 25
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Recommended protective pipe materials for metal smelting
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Aluminium
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bis 700 °C
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GG-22 / Grafit
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Magnesium / Al/MG-Leg.
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Bis 700 °C
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Eisen
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Lagermetall / Blei
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bis 600 °C
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GG-22
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Zink
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bis 600 °C
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GG-22 / Stahl em. / Eisen
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Zinn
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bis 650 °C
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Eisen
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Kupfer
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bis 1250 °C
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X10CrSi29 / Grafit
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Messing
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bis 900 °C
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X10CrSi29 / Grafit
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The evidence of these tables can only be non-binding guidance.
In most cases, experience from prior operating conditions known in special cases, we recommend, specifying the use of ratios in our request.
Using precious metal thermocouple pairs is an inner protection tube made of ceramic KER 710 installed.
For special conditions can corrosion protection tubes from special materials.
Labeling
Each thermocouple is wearing a name plate, which is:
· Serial number
· Number and type of sensors, eg 1 x Type J
· Maximum operating temperature, eg 600 ° C
Mounting instructions
For the connection line connecting between the head and meter management compensation must be used.
It is important to ensure that the right pair of thermocouple compensating cable elected and polarity is correct.
Delivery
The product group of the angles thermocouples includes 3 basic types:
Type I: Protective pipe and Tragrohr from a tube, bent angular
Type III: Protective pipe and elbow with Tragrohr connected; ausverschiedenen protection tube materials available
Type III S: Enhanced protection of pipe corrosion in the field (Badoberfläche), thus longer life
Precious Thermo couples are fitted at delivery, but they will be because of the varying price of precious metals as a separate invoice item.
Standard designs
Standard designs are selected most often applied thermocouples. They are available from stock and are also in small quantities cheaply available.
Variants
Variants broaden the scope of the standard models by altering the dimensions or materials. This allows angular thermocouples in practical use widely different operating conditions.
The elected or thermo-couple protection tube material with the smaller operating temperature determines the max. operating temperature of the thermocouple.
Special designs
Special designs are available in many shapes and materials available:
Examples of special designs are:
· Thermo couples to other standards as DIN
· Standard Thermocouples – Angle Type with spec. protective pipe materials
· Standard Thermocouples – Angle Type with different dimensions
To edit a question on special models, we need:
· detailed description of the measuring, possibly accompanied by sketches on the installation conditions
· where necessary the construction of the thermocouple has already been determined, the drawing with all material information
· has a similar special design of us previously related to the subscription or order number
Items
Many components of catalog types may also be components or assemblies may be paid. They are delivered in containers.
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