Endress+Hauser T-switch Manual

t-switch Technical Information

TI014A/05/e/03.01

t-switch

Flow switch for liquid

and gas

Product Structure ATT11-

Endress+Hauser

GmbH+Co

Instruments International

Colmarer Str 6

D-79576 Weil am Rhein

Germany

Tel: +49 (7621) 97 5 02

Fax: +49 (7621) 97 53 45

www.ii.endress.com

Endress+Hauser Ltd.

Floats Road

Manchester M23 9NF

United Kingdom

Tel: 0161 286 5000

Fax: 0161 998 1841

www.uk.endress.com

Technical Information

TI014A/05/e/03.01

Approvals

AFor use in non-hazardous areas

BFM General Approval (pending)

CCSA General Approval (pending)

YSpecial – please specify

Sensor Form

11 Flat face sensor

12 Flat face sensor, insertion 125mm

13 Flat face sensor, insertion 235mm

21 Probe sensor

22 Probe sensor, insertion 125mm

23 Probe sensor, insertion 235mm

99 Special – please specify

Process Connection

(Material 1.4435/316L unless stated)

D1 G 3/4" BSP, (Boss Included)

D2 G 3/4" BSP, Brass (Boss Included)

Brass compression fitting for insertion

sensor only

F1 NPT 3/4" (Boss Included)

F2 NPT 3/4", Brass (Boss Included)

Brass compression fitting for insertion

sensor only

J1 DN40 Dairy coupling DIN 11851

K1 DN50 Dairy coupling DIN 11851

L1 Varivent >=DN50

M1 Tri Clamp 11/2" ISO2852

N1 Tri Clamp 2" ISO2852

P1 DN50 Aseptic coupling DIN 11864-1

Y9 Special – please specify

Surface Finish, Wetted Parts

1Standard Metal Finish

2Ra<1.5 µm/120 grit

3Ra<0.8 µm/150 grit (3A/EHEDG)

5Ra<1.5 µm/120 grit, O2duty

6Ra<0.8 µm/150 grit, O2duty (3A/EHEDG)

7Standard Metal Finish, O2duty

9Special – please specify

Electronics & Outputs

ARelay Output, No Display, power supply –

18-30V DC/AC (50/60Hz)

BRelay Output, 4 digit LCD, power supply –

18-30V DC/AC (50/60Hz)

St. St. Housing only

YSpecial – please specify

Housing & Cable Entry

4D Polyester Housing IP66 M20 Gland

4H Polyester Housing NEMA4X NPT

1/2" entry

6D SS304 Housing IP66 M20 Gland

6H SS304 Housing NEMA4X NPT 1

" entry

9Y Special – please specify

Documentation

1Standard Documentation

2EN10204-2.3 Pressure test

1.5 x pressure rating for 3 minutes

9Special – please specify

ATT11- Order Code

United Kingdom All Other Countries

Performance and Selection

t-switch

Endress+Hauser 2

t-switch

Endress+Hauser1

Measuring Principle

Sensor Type Liquid (flat face)

Figures referenced to water

Ranged 0-1.5m/sec (provisional)

Time Response: 5 sec rising

< 5 sec falling

(0-66% step change)

Gas (probe)

Figures referenced to Air

Ranged 0-30m/sec (provisional)

Time Response: 15 sec rising

10 sec falling

(0-66% step change)

Extended versions available with alternative

process connections.

Thermal technology is a well established operating principle in the process industry used on a

wide variety of applications. It operates by monitoring the cooling effect of a fluid stream as it

passes over a heated transducer (RTD). The fluid flows over two RTD elements one of which

senses the actual fluid temperature and provides a reference whilst the other is heated to ensure a

constant differential temperature above the fluid temperature. The applied power needed to

maintain this differential is proportional to the mass flow of the fluid.

Planning and Installation

Guidelines

LIQUID

GAS

LIQUID

GAS

LIQUID (Partially Full)

LIQUID

GAS

LIQUID

GAS

LIQUID

GAS

LIQUID

GAS

LIQUID (Dirty)

29.5

Performance and Selection

Process Plant

Features and Benefits

Chemical Industry

•Single device for liquids and gas

•Wide dynamic rangeability

•No moving parts –reduced maintenance

•Simple and reliable to install and programme

•Wide selection of process connections

•Incorporates fuzzy logic control algorithm allowing manual adjustment of meter sensitivity to suit

application requirements

•Dry run protection for pumps

•Control of cooling systems for pumps, turbines, compressors and heat exchangers

Water Treatment

Beverage Industry

•Status indication of valves in water distribution systems

•Chemical dosing

•Air injection

•Filter control

•Monitoring cleaning processes

Dairy Industry •Cooling systems in refrigeration plants

•Chemical dosing

•Monitoring pump function

Applications

•Mount upstream of control valves, hand or isolation valves

•Ensure sensor is aligned with direction of flow (see manual)

•For liquids ensure full pipes

•Avoid areas of cavitation (liquids)

•For gases avoid areas where condensate collects

•Avoid applications with large process temperature changes

•Avoid mounting device where exposure to extreme ambient temperature changes occurs e.g.

direct sunlight

t-switch

Endress+Hauser 4

t-switch

Endress+Hauser3

18-30V AC/DC (50/60Hz) 24V DC @ 0.5 A

120V AC @ 0.5

Power

For BSP and NPT threads

"L"

Process Connection

Extended Sensor

Planning and Installation

Guidelines

Sensor Orientation

•Each process connection has an orientation

mark, this should be positioned in line facing

the oncoming flow.

•Sensor should be installed such that the

sensing surface is in contact with the flowing

medium at all times.

•There is an allowed orientation tolerance of

+/- 5°from centre.

Sanitary Sensor

•It is the responsibility of the user to ensure

that the volume enclosed by the mounting

boss has sufficient dimensions to ensure

adequate cleaning takes place.

Mounting and Installation

Note:

5º

Flow

Direction

Electrical Connection

Operation

Insertion Sensor

Mounting Boss

Accessories

Display socket

LED for

Switchpoint/Error

Indication

Note: In order to meeet EMC requirements, screened or shielded cable is recommended.

8 DIL Programming

Switches

LED (Light Emitting Diode)

•Illuminates when measured flow above switchpoint.

•Off when measured flow below switchpoint.

•Flashes to indicate an error.

LCD (Liquid Crystal Display)

•Optional display used to indicate flow as a percentage of maximum. Also displays programming

information and error codes (not essential for programming).

Threaded Flanges

with G 3/4BSP or 3/4NPT thread for mounting a

t-switch.

Available sizes: DN25 PN25

ANSI 1" 150lbs

DN40 PN25

ANSI 11/2" 150lbs

DN50 PN25

ANSI 2" 150lbs

Avoid installing in areas of extreme flow

turbulence. For example:

•Directly after bends or

expansions/reductions.

All downstream dimensions provided only

as a guideline and wherever possible

greater dimensions should be considered.

•Directly after pumps, fans and

compressors.

>10 dia

•Directly downstream of isolation and

control valves.

>50 dia

>25 dia

H = ≤1/3D

Dimensions of extended versions (L in mm)

Sensor Option

Flat-Face

Probe

Insertion 125mm

125

Insertion 235mm

235

Side view End view

t-switch

Endress+Hauser 6

t-switch

Endress+Hauser5

All dimensions in mm

Polyester Housing

No display

Steel Housing

No display

Steel Housing with

Extended Lid

With display

Housing and Sensor

Process

Connection

Dimensions with

Flat-Face Sensor

Dimensions with

Probe Sensor

Process Limits

Process Connection

Process Conditions

Materials

Process Connections

Performance Limits

Human interface

Electrical

BSP 3/4" (G) max 25 bar A

max 80°C

29.5

3/4" NPT max 25 bar A

max 80°C

29.5

12.8

Sanitary coupling

DN40

DN50

to DIN 11851

max 25 bar A

max 80°C

29.5

Varivent

DN50

max 10 bar A

max 80°C

29.5

∅68

Triclamp

11/2"

ISO 2852

max 16 bar A

max 80°C

29.5

Aseptic coupling

DN50

to DIN 11864

max 25 bar A

max 80°C

29.5

∅85

max 76

max 130

∅76

max 64

max 125

∅76

max 64

max 145

Technical Data

•Nominal Process Diameters: DN25-1000

•Process Pressure Range: 25 Bar g (Process fitting dependent)

•Process Temperature Range: -10 to +80°C

•Meter Body: 1.4404/1.4435/316L

•Transducers: 1.4404/1.4435/316L

•Polyester Housing: PBT-FR (polyester) with cover in PBT-FR or with transparent cover in PA 12,

Seal of cover; EPDM

•Steel Housing: 1.4301 (AISI 304), seal of cover silicone

•Cable Gland: Polyamide

•Parallel thread BSP 3/4" (includes brass 3/4" compression fitting for insertion sensors only)

•Tapered thread 3/4" NPT (includes brass 3/4" compression fitting for insertion sensors only)

•Sanitary coupling DN40, 50 to DIN 11851

•Varivent DN50 to factory standard Tuchenhagen

•Triclamp 11/2", 2" to ISO 2852

•Aseptic coupling DN50 to DIN 11864

•Accuracy: ± 5% of full scale

•Repeatability: ± 1% of full scale

•Time Response Flat Face: 5 sec rising, < 5 sec falling

•Time Response Probe: 15 sec rising, 10 sec falling

•Flow Ranges Liquid: 0-1.5m/sec ref. to water (provisional)

•Flow Ranges Gas: 0-30m/sec ref. to air (provisional)

•Electronic Insert: 8 DIL switches for commissioning

•Red LED to indicate switching status, flashes under fault condition

•Optional Display: 4 numeric characters with bar graph

•Power Supply: 18-30V DC / AC (50/60 Hz)

•Power Consumption: <3W

•Relay Output: Selectable Normally Closed (NC) or Normally Open (NO) (NO as factory default)

Environment •Storage Temperature Range: -20 to +80°C (without LCD)

•Ambient Temperature Range: -10 to +65°C (without LCD)

•Degree of Protection: Polyester and steel housings: IP66 to EN 60529

•Vibration Resistance: Up to 1g, 10....150Hz to IEC 60068-2-6

•Shock Resistance: to IEC 60068-2-31

•Electromagnetic Compatibility (EMC): IEC 801 part3: E = 10V/m (30MHz...1GHz)

Approvals

Approvals Pending

EHEDG, all wetted materials FDA listed. Meets the requirements of 3A.

CSA General Approval, FM General Approval.

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