MI RTD cable

MI RTD cable is used in combination with an RTD, thinfilm or wirewound. The Copper, Nickel or Constantan wires ensure a stable transmission of the signal and our two different designs (wide-spaced and regular spaced) guarantee efficient mounting for either method.

General specification

Outside Sheath Diameter

±0.002" (±0.05mm) or ±1% of nominal diameter, whichever is greater.

Wall Thickness

±0.001" (±0.03mm) or 10% of nominal wire diameter, whichever is greater, 15% of sheath diameter as a minimum.

Wire Diameter

±0.0015" (±0.04mm) or ±15% of nominal wall thickness, whichever is greater, 10% of sheath diameter as a minimum.

 

Part number breakdown

Symbol

(1)

-

(2)

(3)

-

(4)

(5)

(6)

Example

120

-

6

M

-

C

(Ni)

J


1. Sheath diameter
2. Number of wires
3. Insulation material
4. Sheath material
5. RTD Wire type
6. Wire spacing


1. Sheath diameter

Symbols standard diameters (inches)

040

060

062

079

120

177

236

250

313

Metric Equivalent (mm)

1,0

1,5

1,6

2,0

3,0

4,5

6,0

6,4

8,0

Average Weight (gr)

9,7

11,5

17,5

36,6

40,8

99,8

174

272

319

Average Length (m)

250

185

160

170

145

160

94

62

50

For non standard sheath diameters write down the diameter in Inches.  Example : .125 for a 3,2 mm

 

2. Number of conductors 

Wires
(symbol)

Sheath diameter

2

1,0

1,5

2,0

3,0

4,5

6,0

6,4

8,0

3

4

6

X

X

X

8

X

X

X

 

3. Insulation Material

Insulation type

Symbol

Recommended max. operating temperature

Approx. melting temperature

Purity

Magnesium Oxide (MgO)

M

1700°C

2800°C

98% pure (Okazaki standard)

High Purity Magnesium Oxide

N

1700°C

2800°C

99.4% pure

 

4. Sheath Material

Sheath type

Symbol

Recommanded  Max temperature

Melting

temperatur

Standard sheath diameters

Copper

H

600°C

1080°C

On request

AISI 304

A

900°C

1400°C

On request

AISI 316

C

900°C

1370°C

040, 060, 062, 079, 120, 177, 157, 236”

AISI 321

E

1090°C

1350°C

Inconel 600 

B

1175°C

1345°C

On request


5. Conductor wire type

Symbol

Wire material

Recommended max. temperature

(CU)

Copper

400°C

(NI)

Nickle

600°C

(AQ)

Constantan

650°C

 

6. Spacing of conductors

Symbol

 

Sheath diameter

 
 

1,0

1,5

2,0

3,0

3,2

4,5

6,0

8,0

 

A

2-wire

X

X

X

0,9

1,0

1,5

2,0

2,7

Inner circle diameter (ICD)

 

 

Inner circle diameter (ICD)

  3-wire

X

X

X

4-wire

X

X

X

6-wire

X

X

X

8-wire

Technical not possible according to DIN60615

J

 

1,0

1,5

2,0

3,0

3,2

4,5

6,0

8,0

2-wire

X

0,21

0,26

0,39

0,41

0,59

0,78

0,98

3-wire

X

0,22

0,27

0,40

0,43

0,61

0,82

1,09

4-wire

X

0,27

0,32

0,49

0,52

0,76

1,03

1,37

6-wire

X

X

X

0,67

0,72

1,08

1,46

1,94

 8-wire

X

X

X

X

X

X

1,80

2,25

 

 Drawing RTD Cable

Insulation Resistance

The insulation Resistance (IR) test is a test required by the electrical safety testing standards. The insulation resistance test consists in measuring the insulation resistance of a device under test, while phase and neutral are short circuited together. 
A megohmmeter is used to measure the ohmic value of an insulator under a direct voltage of great stability. Insulation resistance of sheath thermocouple material, the electric shunting resistance between a pair. 

OD of AerOpak (mm)

Characteristics

Ø 0.1 < O.D.? Ø 0.15

1 Megaohm /3 vDC

Ø 0.25 < O.D.? Ø 0.50

5 Megaohm/50 vDC

Ø 0.50 < O.D.? Ø 3.0

20 Megaohm/100 vDC

Ø 3.00  > O.D.

100 Megaohm/500 vDC

 

 

 

 

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