Delta-controls 201 Bedienungsanleitung PDF herunterladen

GENERAL

The unit is manufactured, checked and supplied in

accordance with our published specification, and when

installed and used in normal or prescribed

applications, with the lid in place and within the

parameters set for mechanical and electrical

performance, will not cause danger or hazard to life or

limb.

HEALTH AND SAFETY AT WORK ACT 1974

WARNINGS

1. THE USERS ATTENTION IS DRAWN TO THE

FACT THAT, WHEN THE UNIT IS "LIVE" WITH

RESPECT TO ELECTRICAL OR PRESSURE

SUPPLIES, A HAZARD MAY EXIST IF THE UNIT IS

OPENED OR DISMANTLED.

2. UNITS MUST BE SELECTED AND

INSTALLED BY SUITABLY TRAINED AND

QUALIFIED PERSONNEL IN ACCORDANCE WITH

APPROPRIATE CODES OF PRACTICE SO THAT

THE POSSIBILITY OF FAILURE RESULTING IN

INJURY OR DAMAGE CAUSED BY MISUSE OR

MIS-APPLICATION IS AVOIDED.

3. TYPE W AND A ENCLOSURES HAVE A

SAFETY BLOW-OUT DISC FITTED IN THE REAR

OF THE ENCLOSURE TO PREVENT DANGEROUS

PRESSURISATION OCCURRING IN THE EVENT OF

A BELLOWS FAILURE. THIS MUST NOT BE

OBSTRUCTED DURING INSTALLATION. LEAVE AT

LEAST 6MM CLEARANCE BETWEEN THE BACK

FACE OF THE ENCLOSURE AND THE MOUNTING

SURFACE. DO NOT REMOVE OR REPLACE WITH

ANY OTHER DEVICE NOT APPROVED BY DELTA

CONTROLS.

DO NOT REMOVE AND REFIT BACKPLATE SO AS

TO OBSTRUCT THE BLOW-OUT DISC.

CAUTION

Applied vacuum will damage some low pressure range

instruments unless they are supplied in protected form.

OPERATING PRINCIPLES

A metal bellows is used to sense the process

pressure. The bellows transmits a force proportional to

the applied pressure to an operating beam. The beam

is restrained by an adjustable spring. When the force

on the beam overcomes the spring tension the beam

moves and operates a switch or switches. On

reduction of the applied pressure the force applied to

the beam also falls, the beam is restored to its original

position by the spring, and the switch resets.

Switching Differential Adjustment: Model 202 (Fig 4)

1. Rotate the knurled plastic wheel on the microswitch to

adjust the switch differential. Rotate clockwise to

increase the differential and counter clockwise to

reduce the differential. Note: Rotating the knurled

plastic wheel will alter the operating value on rising

pressure only.

Replace the instrument lid (See maintenance).

Switching Differential Adjustment: Model 203 (Fig 5)

1. Rotate the secondary adjuster screw to move the

secondary indicator along the "arrow" scale. Rotate

clockwise to increase the differential and counter

clockwise to decrease the differential.

2. Replace instrument lid (See maintenance).

Note: Rotating the secondary adjuster knob (screw) will

alter the operating value on rising pressure only. For

accurate setting, a suitable pressure gauge should be

used in conjunction with the above procedure. Do not

attempt to set the switch outside the scale limits. Though

the unit may be set anywhere within its operation range,

for optimum performance, it is good practice to have a set

point value between 25% and 75% of span.

REPLACEMENT PARTS

Use only factory authorised parts and procedures. The

only parts normally recommended for site replacement are

the microswitches. However, in some circumstances other

spares kits are available. Apply for details quoting the

serial number and full product code.

WARRANTIES - SEE CONDITIONS OF SALE

PRODUCT CODE

ENCLOSURE

MODEL

ELECTRICAL ENTRY

MATERIAL OF WETTED PARTS

RANGE

SWITCHING OPTIONS

PROCESS CONNECTION

OPTIONS AND TREATMENTS

SPECIAL ENGINEERING

On enclosures H, and K, remove the lid using an

appropriate tool if tight e.g. edge of spanner or metal

rod (fig 1A).

INSTALLATION

The instruments are designed to be mounted vertically with

the process connection underneath. They can be mounted

either direct to process or to a wall or panel using the

backplate provided. Select the mounting point so as to

avoid excessive shock, vibration or temperature

fluctuation. Instruments should be mounted to avoid

excessive heat transfer from the process lines or adjacent

plant.

If sudden changes of pressure (pulsation’s) are likely then

we recommend that snubbers are fitted between the

process line and switch.

Use a spanner to support the process connection when

fitting the instrument. When fitting the instrument lid make

sure gaskets or 'O' rings are in good condition and fitted

correctly.

WARNING: CHECK THE CONNECTION THREAD SIZE

AND SPECIFICATION ON THE UNIT TO AVOID MIS-

MATCHING WITH THE PROCESS CONNECTION

ADAPTOR. SEE DIGIT 11 OF PRODUCT CODE.

WIRING (Fig 1)

Wire in accordance with local and National codes. Use

cables no larger than 2.5 mm sq. (14AWG). Deliver

electrical connection through a suitable cable gland which

will maintain the IP rating of the instrument. Insert bare

wires fully into the terminal block and tighten securely.

Keep wiring tails to a minimum and check that wires do not

interfere with the operating mechanism. Use the earthing

points provided.

CERTIFIED ENCLOSURES

All Series 200 Pressure Switches can be supplied with

BASEEFA certified enclosures to the following standards:

Zone 1 (Div 1) IEC 60079-0 and IEC 60079-1

BS 5501:Parts 1 and 5: EN50 014 and EN50 018

CENELEC Codes ‘H’ for aluminium and ‘K’ for cast iron

2GD Exd IIC T6

Zone 2 (UK Only)

BS 4683: Part 3, Enclosure Code "N". ExN IIT6

All enclosures are suitable for outdoor use and the majority

of products are rated IP66. Refer to the product label

and/or leaflet. Only operation, maintenance or repair

procedures either contained herein or approved by Delta

Controls may be used, to avoid rendering the equipment

unsafe in operation and/or nullifying the Certification. NO

MODIFICATIONS ARE PERMITTED.

Electrical Adaptors

Zone 1. Use only certified adaptors for Zone 1.

WARNING: IT IS A REQUIREMENT OF SAFETY THAT

AT LEAST 5 FULL THREADS ARE ENGAGED

BETWEEN THE ADAPTOR AND CONDUIT ENTRY.

TAKE CARE TO SELECT AND INSTALL ADAPTORS

THAT DO NOT REDUCE THE ENCLOSURE IP RATING.

Zone 2.

Adaptors used must have equivalent IP rating to the

enclosure and be impact resistant to 7 Nm.

References for Selection and Installation

BS 5345 Part 3 for Enclosure Codes H and K

BS 5345 Part 4 for all Enclosure Codes (Intrinsic Safety)

BS 5345 Part 7 for Enclosure Code N

BS 5490 IEC 529 IP RATING (Ingress Protection)

MAINTENANCE

Inspections should be carried out at quarterly to yearly

intervals depending upon operating conditions.

Isolate the unit from process and power and remove the

lid. Check all terminals for tightness. Check that cable tails

are not fouled or chafed. Check for internal condensation.

Rectify as necessary.

It is recommended that instruments used to provide an

alarm are operated periodically to ensure they are

functioning correctly.

If further maintenance is required seek advice from DELTA

CONTROLS before attempting repair or replacement of

parts.

CAUTION

Moving parts have been treated with a water repelling

lubricant before leaving the factory. Occasional inspection

and the application of a water repelling lubricant is

recommended to ensure moving parts remain free under

all conditions.

WARNING: DOES NOT APPLY TO OXYGEN SERVICE.

Zone 1 enclosures

Thread seal and contact surfaces must be lightly lubricated

using a non-setting non-corrosive grease compatible with

the nitrile lid seal. Do not use copper bearing grease on

aluminium. Screw on lid hand tight making sure that

mating surfaces of the lid and enclosure are in contact. Re-

tighten the lid lock screw.

WARNING: IT IS A SAFETY REQUIREMENT THAT AT

LEAST 5 FULL THREADS ARE ENGAGED WHEN THE

UNIT IS IN OPERATION. NEVER OPERATE THE UNIT

UNLESS THIS CONDITION IS MET. DO NOT USE

GREASES OR LUBRICANTS NOT COMPATIBLE WITH

THE ENVIRONMENT OR PROCESS.

Weatherproof Enclosure (W) and (N).

If lid gasket is dried out or damaged, replace with new

greased gasket.

Stainless Steel Weatherproof Enclosure (A)

Check gasket. If damaged, replace.

OPERATION

Pressure switches are supplied calibrated against falling

pressure unless otherwise specified. Set Point adjustment

refers to falling pressure. Switching differential is the

difference between the set point and the operating value

on rising pressure. Before commencing adjustments or

removing the lid, isolate the instrument from process and

power. For opening details see Figs 1A, 6, 7, 8.

Set Point Adjustment: Models 201, 202, 203 (Fig 2)

1. Loosen the M3 hexagon head locking screw.

2. Rotate the 20 mm A/F hexagon head adjuster knob to

move the indicator along the calibrated scale. Rotate

clockwise to increase the set point and counter

clockwise to decrease the set point.

3. Retighten the locking screw taking care not to

overtighten.

4. Replace the instrument lid (See maintenance).

Set Point Adjustment: Model 281 (Fig 3)

The model 281 provides 2 microswitches which can be set

independently against individual scales using a special

dual beam mechanism. This fulfils the need for HI LO

switching, adjust as follows:

1. Loosen the rear M3 hexagon head locking screw.

2. Rotate the rear adjuster screw to move the indicator

on the right hand (LO) calibrated scale. Rotate

clockwise to increase the set point and counter

clockwise to decrease the set point.

3. Retighten the locking screw.

4. Loosen the front hexagon head locking screw.

5. Rotate the front adjuster screw to move the indicator

on the left hand (HI) calibrated scale. Rotate

clockwise to increase the set point and counter

clockwise to decrease the set point.

6. Tighten the locking screw.

7. Replace the instrument lid (see maintenance)

ISSUE H 05/09

INSTALLATION, OPERATING AND

MAINTENANCE INSTRUCTIONS FOR

BELLOWS ACTUATED SERIES 200

PRESSURE SWITCHES

(MODELS 201, 202, 203, 281)

SPDT

NC=NORMALLY CLOSED

COM=COMMON

NO=NORMALLY OPEN

2 x SPDT

REAR (LO) FRONT (HI)

SWITCH SWITCH

FIG. 1

350 (13.8)

MIN.

11 (0.43)

25 (1)

5.5 (0.21)R

To remove lid on enclosures E,

H,K,L & M rotate

lid locking mechanism and where lid is tight use

a flat bar (see below) or edge of a ring spanner

to open.

Fig. 1A

ADJUSTER KNOB

LOCKING SCREW

LOCKING PLATE

SCALE PLATE

INDICATOR

FIG. 2

LOCKING SCREW

(HIGH)

FRONT TOP VIEW

OF SWITCHING

MECHANISM

SCALE PLATE

(HIGH)

SCALE PLATE

(LOW)

INDICATOR

LOCKING SCREW

(HIGH)

LOCKINGSCREW

(LOW)

FIG. 3

ADJUSTING

SCREW

ADJUST SWITCHING

DIFFERENTIAL

ADJUSTER KNOB

LOCKING PLATE

SECONDARY

ADJUSTER KNOB

SCALE PLATE

SECONDARY

INDICATOR

FIG. 5

(SCREW)

FIG. 6

FIG. 7

FIG. 8

In the interest of development and improvement Delta Controls Ltd, reserve the right to amend without notice,

details contained in this publication. No legal liability will be accepted by Delta Controls Ltd, for any errors,

omissions or amendments.

YOUR TRUSTED PARTNER IN PROCESS INSTRUMENTATION

DELTA CONTROLS LIMITED, ISLAND FARM AVENUE, WEST MOLESEY, SURREY KT8 2UZ

T +44 (0) 208 939 3511 F +44 (0) 208 783 1163 E sales@delta-controls.com W www.delta-controls.com

Stock No: 002522/201

Registered Office Registered in England No 5369683

FIG.1 shows the state of electrical contacts at

atmospheric pressure.

Note:-

products with ranges below atmospheric

pressure have the wiring reversed between the

terminal block and the microswitch(es) to

achieve this state.

M O D E L W & N 2 0 1 , 20 2, 20 3 , 2 8 1

M0DELS E, H, K, L, M, 201, 202, 203, 281

FIG. 4

M O D E L A 20 1 , 20 2 , 20 3, 28 1

1 2

Inhaltsverzeichnis

Seite 1 - PRODUCT CODE

GENERAL The unit is manufactured, checked and supplied in accordance with our published specification, and when installed and used

Seite 2 - Declaration of Conformity

Verwandte Modelle: 202 | 203 | 281 |

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Delta-controls 201 Bedienungsanleitung

Stöbern Sie online oder laden Sie Bedienungsanleitung nach Sensoren Delta-controls 201 herunter. Delta Controls 201 User Manual Benutzerhandbuch

Inhaltsverzeichnis

Verwandte Modelle: 202 | 203 | 281 |

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