Samson 3301 Manuale di servizio

Mounting and

Operating Instructions

EB 7065 EN

Edition January 2014

Pneumatic Controller for Temperature

Type301-1

Pneumatic Controller for Temperature

Type 3301

2 EB 7065 EN

Denition of the signal words used in these mounting and operating instructions

Note:

Supplementary explanations, informa-

tion and tips



EB 7065 EN 3

Contents

1 General safety instructions.............................................................................4

2 Process medium and scope of application.......................................................5

2.1 Transportation and storage .............................................................................5

2.2 Versions ........................................................................................................5

3 Design and principle of operation ..................................................................6

3.1 Operating and indicating elements..................................................................7

3.2 Pneumatic connections....................................................................................7

4 Installation....................................................................................................8

4.1 Mounting position..........................................................................................8

5 Operation...................................................................................................10

5.1 Adjusting the operating direction ..................................................................10

5.2 Set point adjustment.....................................................................................10

5.3 Adjusting the proportional band ...................................................................10

5.4 Zero adjustment...........................................................................................11

6 Maintenance ...............................................................................................11

7 Nameplate..................................................................................................11

8 Technical data .............................................................................................12

9 Dimensions .................................................................................................12

10 Customer service.........................................................................................13

Contents Page

General safety instructions

4 EB 7065 EN

1 General safety instructions

−The device must be mounted, started up or serviced by fully trained and

qualied personnel only; the accepted industry codes and practices are to

be observed. Make sure employees or third persons are not exposed to any

danger.

−According to these mounting and operating instructions, trained person-

nel refers to individuals who are able to judge the work they are assigned

to and recognize possible dangers due to their specialized training, their

knowledge and experience as well as their knowledge of the applicable

standards.

−To ensure appropriate use, only use the device in applications where the op-

erating pressure and temperatures do not exceed the specications used for

sizing the regulator at the ordering stage.

−The manufacturer does not assume any responsibility for damage caused by

external forces or any other external factors.

−Any hazards that could be caused in the controller by the process medium,

operating pressure or by moving parts are to be prevented by taking appro-

priate precautions.

−Proper transport, storage, installation, operation and maintenance are as-

sumed.

−SAMSON does not assume any liability for damage caused when the device

is not used as intended.

Process medium and scope of application

EB 7065 EN 5

2 Process medium and scope of application

Pneumatic controller functioning as a proportional controller to control the temperature of gases

and vapors at the point of measurement with a pneumatic control valve.

Medium temperatures from 0 to 300 °C

The controller compares the temperature measured by the xed expansion bulb sensor with the

adjusted set point and issues a pneumatic signal between 0.2 to 1bar at the output. This signal

pressure acts on the connected pneumatic control valve. The controller requires a supply pres-

sure of 1.4bar. The measured temperature is indicated at the controller.

2.1 Transportation and storage

Transportation and storage in the permissible temperature range from –10 to +90°C. Protect

the controller against adverse inuences, such as dirt or moisture during storage.

2.2 Versions

Two versions of the Type3301 Controller are available that have different set point ranges.

Table 1: Type3301∙Versions

Type Set point range Conguration ID

(Var.-ID)

3301-9001 0 to 200°C Var.-ID 1063422

3301-9002 100 to 300°C Var.-ID 1294879

The mounting parts are not included in the scope of delivery. They must be ordered separately

(see section 4 on page 8, Fig. 4 and Fig. 5).

Design and principle of operation

6 EB 7065 EN

3 Design and principle of op-

eration

The controller mainly consists of the controller

housing containing a nozzle and apper sys-

tem, pressure gauges for supply air and out-

put pressure as well as the temperature sensor

with an outer tube (11) and Invar rod (12).

The different expansion properties of the In-

var rod and tube materials produce a de-

ection each time the temperature at the sen-

sor changes. This deection causes the differ-

ential plate (3) mounted on the plate spring

(9) to tilt on the ball (5), and causes the dis-

tance between the nozzle (2) and apper (4)

to change. The supply air pZ (1.4± 0.1bar)

ows through the restriction (1) to the nozzle

(2). These two components act as a pressure

divider controlled by the apper. As a result,

the output pressure p

(controlled variable 0.2

to 1bar) is regulated proportional to the sys-

tem deviation and in relation to the xed op-

erating point of 0.6bar.

The set point is adjusted at the screw (8) con-

nected to the set point pointer (7). The pro-

portional band is adjusted at the adjustment

screw (6). The position of the red dot on the

screw (6) indicates the operating direction ad-

justed.

Position in scale range

: The output pres-

sure pA increases as the controlled variable

increases.

Position in scale range

: The output pres-

sure pA decreases as the controlled variable

increases.

Fig. 1: Functional diagram of Type3301

1 Restriction

2 Nozzle

3 Differential plate

4 Flapper

5 Ball

6 Adjustment screw for Xp

(proportional band)

7 Set point pointer

8 Screw for set point adjustment

9 Plate spring

10 Base plate

11 Outer tube

12 Invar rod

pZSupply air (1.4± 0.1bar)

pAOutput pressure (0.2 to 1bar)

pZ pA

Design and principle of operation

EB 7065 EN 7

3.1 Operating and indicating elements

Fig. 2: View from the front

3.2 Pneumatic connections

The connections for supply air p

and output pressure p

are located underneath the control-

ler. They are designed as

NPT tapped holes.

Various screw ttings to connect pipes and plastic hoses are available.

Fig. 3: Pneumatic connections underneath the controller

Adjustment screw

for Xp and oper-

ating direction

Pressure gauge for

supply air pZ

Pressure gauge for

output pressure pA

Screw for set

point adjustment

Set point pointer

Connection for

supply air pZ

Connection for

output pressure pA

Output

Supply air

Installation

8 EB 7065 EN

Screw gland (PN10)

Suitable for pipes and pressure vessels up to

max. 10bar. Seal the screw tting. Push in the

sensor with screw gland and coupling nut. Tight-

en the coupling nut.

*) G ½: Order no.: 1080-4881

G ¾: Order no.: 1080-4882

Screw gland with clamping nut (PN 40)

For use with pressure up to max. 40bar.

Tighten the clamping nut (instead of the cou-

pling nut).

*) G ½: Order no.: 1080-4884

G ¾: Order no.: 1080-4885

Thermowell with thread (PN63) for pressures up to 63bar

A thermowell must be used in place of the screw

gland if the pressure at the sensor is greater than

the nominal pressure, if the medium to be con-

trolled is corrosive or the controlled system is to

continue to operate while the controller is being

replaced. Screw the thermowell into the sleeve.

Push the temperature sensor into the thermowell

and fasten with the coupling nut.

*) G ½: Order no.: 1080-4888

G ¾: Order no.: 1080-4889

Fig. 4: Mounting parts for sensor · Screw glands and thermowell

4 Installation

The controller may be installed in any posi-

tion. Make sure that the effective length of the

sensor (330mm) is completely surrounded by

the medium.

Install a reference thermometer close to the

controller to monitor the temperature (and to

check zero).

4.1 Mounting position

To install the controller, a coupling sleeve with

G½ or G¾ female thread must be present at

the point of measurement. Screw or seal one

of the mounting parts shown in Fig.4 and 5

into this sleeve.

The mounting parts are not included in the

scope of delivery. They must be ordered sep-

arately. Select accessories required for the op-

erating conditions at the site of installation.

Installation

EB 7065 EN 9

Thermowell for welding (PN 63) for pressures up to 63 bar

Order no.: 1080-4890

Thermowell with ange DN 25 for PN 40 or PN 100

Order no.: 1080-4891 (PN40)

Order no.: 1080-4892 (PN100)

Clamping ange

For wall mounting, e.g. on pressureless vessels

in air-conditioning and ventilation plants.

Screw the ange to the wall using the two

screws. Attach the temperature sensor in the

ange using two other screws.

Order no.: 1090-9547 (PN40)

Order no.: 1080-4892 (PN100)

Fig. 5: Mounting parts for sensor · Thermowells and clamping ange

SW 32

373

Ø 22.3

335 40

Ø 21.3

SW 32

8 Ø50

Ø12

Ø26

Ø9.5

Operation

10 EB 7065 EN

Turn the adjustment screw (8) until the set

point pointer (7) points to the required

temperature on the scale.

Adjustment screw (8)

Note:

Do not turn the pointer past the adjust-

ment range of the scale.

5.3 Adjusting the proportional

band

The continuously variable adjustment of the

gain is performed at the adjustment screw (6).

Gain

High

Low

Make sure that the adjustment is only per-

formed within the operating direction deter-

mined in section 5.1, i.e. either on the left or

right side of the scale.

The gain can be adjusted continuously in the

direction of the arrow between 2 and 20%.

The red dot on the adjustment screw (6) serves

as the orientation mark.



5 Operation

See Fig. 1 on page 6.

5.1 Adjusting the operating

direction

Adjust the operating direction before start-up

as follows:

Undo the screw on the cover and swivel

the guard plate out of the way.

Screw with guard plate

Use a screwdriver to adjust the adjustment

screw (6) counterclockwise () or clock-

wise () to make the red dot on the screw

point to the required operating direction

on the scale.

Adjustment screw (6)

−Increasing/increasing

The output pressure pA increases as the

temperature at the sensor increases.

−Increasing/decreasing

The output pressure pA decreases as the

temperature at the sensor increases.

5.2 Set point adjustment

Undo the screw on the cover and swivel

the guard plate out of the way.

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