Samson 4763, Mounting And Operating Instructions

EB 8359-2 EN

5

Technical data

Type 4736 Positioner

Travel range

7.5 to 60 mm, with 90 mm lever extension

Reference variable
Split-range 0 to 50 %

and 50 to 100 %

Reference variable span

(up to 50 mm travel)

4 to 20 mA (Ex)

Internal resistance R

i

at 20 °C approx. 250

W ±

7 %

4 to 20 mA (not Ex) Internal resistance R

i

at 20 °C approx. 200

W ±

7 %

0 to 20 mA

Internal resistance R

i

at 20 °C approx. 200

W ±

7 %

1 to 5 mA

Internal resistance R

i

at 20 °C approx. 880

W ±

7 %

Range spring

See table on page 14

Supply air

Supply air

1.4 to 6 bar (20 to 90 psi)

Air quality acc.

to ISO 8573-1

(2001)

Maximum particle size and density: Class 4  ·  Oil content: Class 3

Pressure dew point: Class 3 or at least 10 K below the ambient temperature to

be expected

Output signal pressure p

st

Max. 0 to 6 bar (0 to 90 psi)

Characteristic

Linear  ·  Deviation from terminal-based conformity:

£

1.5 %

Hysteresis

< 0.5 %

Sensitivity

< 0.1 %

Operating direction

Reversible

Proportional band X

p

(at 1.4 bar supply air)

1 to 3 %

with spring 1 or 2

1 to 1.5 % with spring 3

Air consumption in

steady state, X

p

= 1 %

With 1.4 bar supply air: 0.19 m

n

³/h

With 6 bar supply air: 0.5 m

n

³/h

Air output capacity

At

D

p 1.4 bar: 3.0 m

n

³/h

At

D

p 6 bar: 8.5 m

n

³/h

Transit time for Type 3271

“Stem extends”

240 cm²:

£

1.8 s  ·  350 cm²:

£

2.5 s  ·  700 cm²:

£

10 s

Permissible ambient

temperature

–20 to 70 °C;

With metal cable gland: –35 to 70 °C

Special version: –45 to  80 °C

The limits specified in the EC Type Examination Certificate additionally apply

for explosion-protected devices.
Version with oxygen as operating medium up to max. 60 °C

Influences

Temperature < 0.03 %/1 K

Supply air

< 0.3 %/0.1 bar

Vibration:

< 2 % between 10 and 150 Hz and 4 g

Effect when turned by 180°: < 3.5 %

Degree of protection

IP 54  ·  Special version IP 65

Weight

Approx. 1.2 kg

Materials

Housing: Die-cast aluminum, chromated and plastic-coated

External parts: Stainless steel