Mercoid PBLTX Series Manuel utilisateur

Series PBLTX Submersible Level Transducer

Specifications - Installation and Operating Instructions

Bulletin L-23

The PBLTX Submersible Level Transducer is manufactured

for years of trouble free service in the harshest applications. The

PBLTX measures the height of liquid above its position in the

tank referenced to atmospheric pressure. The transducer con-

sists of a piezoresistive sensing element, encased in a 316 SS

housing. Perfect for wastewater and slurry applications with fea-

tures to protect the unit from these demanding applications.

Large diameter 316 SS diaphragm seal is non-clogging and

damage resistant to floating solids.

Comes equipped with a 270-pound tensile strength, shielded,

vented cable. Ventilation tube in the cable automatically com-

pensates for changes in atmospheric pressure above the tank.

The vent is protected with a maintenance free filter eliminating

particulate or water droplets from entering the transducer.

Intrinsic Safety Approval Classification

The PBLTX is UL listed for use in Hazardous (Classified) Loca-

tions. The protection method is by Intrinsic Safety, “ia”. It was in-

vestigated by UL under UL Standard 913 Sixth Edition and CSA

Standard No. 157-92.

For use in Hazardous (Classified) Locations:

Class I Div. 1 Groups A,B,C,D

Class II Div. 1 Groups E,F,G

Class III Div. 1

Temperature Code: T4 @ 80°C ambient

Install in accordance with control drawing 01-700797-00.

WARNING: To prevent ignition of flammable or

combustible atmospheres, disconnect power be-

fore servicing.

Use with approved safety barriers using entity

evaluation.

SPECIFICATIONS

Service: Compatible liquids.

Wetted Materials: 316 SS, 316L SS, Buna-N, cable: ETFE or

polyurethane.

Accuracy: ±0.25% full scale.

Temperature Limit: 0 to 176ºF (-18 to 80ºC).

Compensated Temperature Range: 0 to 176ºF (-18 to 80ºC).

Thermal Effect: Less than ±.02%/ FS/ºF.

Pressure Limit: 2X full scale.

Power Requirement: 10-28 VDC.

Output Signal: 4 to 20 mA DC, two wire.

Response Time: 50 msec.

Max. Loop Resistance: 900 ohms.

Electrical Connection: Wire pigtail.

Mounting Orientation: Suspended in tank below level being

measured. Can be placed on the bottom of the tank on its side.

Weight: 4.3 lb (2.0 kg).

Agency Approvals: CE, UL Intrinsically Safe to UL Standard

913. (See Intrinsic Safety Approval Classification).

The following standards were used for CE approval:

IEC 61000-4-2: 2001

IEC 61000-4-3: 2006

IEC 61000-4-4: 2004

IEC 61000-4-5: 2005

IEC 61000-4-6: 2006

IEC 61000-4-8: 2001

CENELEC EN 55011: 2003

CENELEC EN 61326: 2003

89/336/EEC EMC Directive

MERCOID DIVISION

DWYER INSTRUMENTS, INC.

P.O. BOX 258 • MICHIGAN CITY, IN 46361 U.S.A.

Phone: 219/879-8000 www.dwyer-inst.com

Fax: 219/872-9057 e-mail: [email protected]

Vmax

28VDC

Imax

93mA

0.051_F

240_H

Entity Parameters

0.651W

60˚

TYP

ø1/4 x THRU

[ø6.35 x THRU]

ø3-7/16

[ø87.31] ø1/4 [ø6.35] x THRU

ON A ø1-39/64 [ø40.88] B.C.

8-3/32

[205.58]

2-3/16

[55.56]

BREATHER TUBE

ø1 [25.40]1/2 NPT SUBMERSIBL

CABLE

L23_test:Layout 1 12/7/09 8:48 AM Page 1

5. Wiring

An external power supply delivering 10-28 VDC with minimum

current capability of 40 mA DC (per transducer) is required to

power the control loop. See Fig. A for connection of the power

supply, transducer and receiver. The range of appropriate re-

ceiver load resistance (RL) for the DC power supply voltage avail-

able is expressed by the formula:

RL Max =Vps – 10V

20 mA DC

Shielded cable is recommended for control loop wiring.

Black wire is negative (-) and red wire is positive (+) in Fig. B.

MAINTENANCE

After final installation of the pressure transducer and its compan-

ion receiver, no routine maintenance is required. A periodic check

of system calibration is suggested. The Series PBLTX transduc-

ers are not field repairable and should be returned if repair is

needed (field repair should not be attempted and may void war-

ranty). Be sure to include a brief description of the problem plus

any relevant application notes. Contact customer service to re-

ceive a return goods authorization number before shipping.

CAUTION: Do not exceed specified supply

voltage ratings. Permanent damage not cov-

ered by warranty will result. This device is not

designed for 120 or 240 volt AC operation.

Use only on 10 to 28 VDC.

INSTALLATION

1. Location: Select a location where the temperature of the trans-

ducer will be between 0 and 176°F (-18 to 80°C). Distance from

the receiver is limited only by total loop resistance.

2. Position: The transducer is not position sensitive. However all

standard models are originally calibrated with the unit in a posi-

tion with the diaphragm downward. Although they can be used at

other angles, for best accuracy it is recommended that units be

installed in the position calibrated at the factory.

3. Mounting: The transducer can be mounted via several meth-

ods. It can be suspended from the electrical cable, it can be

placed resting on the bottom of the tank in either horizontal or

vertical orientation, or it can be attached to a pipe or hang wire by

the 1/2˝ NPT male connection on the top of the housing.

4. Wire Length: The maximum length of wire connecting the

transducer and receiver is a function of wire size and receiver re-

sistance. Wiring should not contribute more than 10% of the re-

ceiver resistance to total loop resistance. For extremely long runs

(over 1000 feet), choose receivers with higher resistance to min-

imize the size and cost of connecting leads. Where wiring length

is under 100 feet, wire as small as 22 AWG can be used.

POWER

SUPPLY

10-28 VDC

RECEIVER

BLACK

RED

PRESSURE

TRANSDUCER mA

Fig. A

Fig. B

BLACK (-)

RED (+)

L23_test:Layout 1 12/7/09 8:48 AM Page 2

NOTES:

1. MAX SAFE AREA VOLTAGE NOT TO EXCEED 250 VAC.

2. NO REVISIONS WITHOUT PRIOR UNDERWRITERS LABORATORY APPROVAL.

3. (ENTITY CONCEPT DEFINITIONS)

THE ENTITY CONCEPT ALLOWS INTERCONNECTION OF INTRINSICALLY SAFE APPARATUS TO ASSOCIATED APPARATUS

NOT SPECIFICALLY EXAMINED IN SUCH COMBINATION. THE CRITERIA FOR INTERCONNECTION IS THAT THE VOLTAGE AND

CURRENT WHICH INTRINSICALLY SAFE APPARATUS CAN RECEIVE AND REMAIN INTRINSICALLY SAFE, CONSIDERING FAULTS, MUST BE

EQUAL TO OR GREATER THAN THE VOLTAGE (Voc) AND CURRENT (Isc) LEVELS WHICH CAN BE DELIVERED BY THE

ASSOCIATED APPARATUS. CONSIDERING FAULTS AND APPLICABLE FACTORS. IN ADDITION, THE MAXIMUM UNPROTECTED CAPACITANCE AND

INDUCTANCE (Ci & Li) OF THE INTRINSICALLY SAFE APPARATUS. INCLUDING INTERCONNECTING WIRING. MUST BE EQUAL TO OR LESS THAN

THE CAPACITANCE AND INDUCTANCE WHICH CAN BE SAFELY CONNECTED TO ASSOCIATED APPARATUS.

4. INSTALLATION MUST BE IN ACCORDANCE WITH THE NATIONAL ELECTRICAL CODE (NFPA 70, ARTICLE 504) AND ANSI/ISA-RP12.6.

IMPORTANT! NO REVISIONS WITHOUT

PRIOR UNDERWRITERS LABORATORIES

APPROVAL CAN BE IMPLEMENTED

01-700797-00

HAZARDOUS (CLASSIFIED) LOCATION

INTRINSICALLY SAFE

FOR CLASS I DIV.1 GROUPS A,B,C,D

CLASS II DIV. 1 GROUP E,F,G

CLASS III DIV. 1

T4 TEMPERATURE CODE BASED ON 80˚C AMBIENT

NONHAZARDOUS LOCATION

ASSOCIATED APPARATUS

WITH ENTITY PARAMETERS

RED

OR PIN 1

IS626, PBLTX OR SBLTX SERIES

TRANSDUCERS

BLACK

OR PIN 4

Vmax = 28VDC

Imax = 93mA

Ci= .051µF

Li= 240µH

Pi= 0.651W

CATALOG NUMBERS:

IS626-aa-bb-cc-dd-ee-ffff

PBLTX-aaa-bbb-cccc

SBLTX-aa-bb-cccc

WHERE:

a,b,c,d,e & f = ANY LETTER OR NUMBER

BULLETIN ARTWORK

INTRINSIC SAFETY

CONTROL DRAWING FOR

IS626, PBLTX & SBLTX SERIES

SCALE 1:1

3FR. NO.

Voc ≤28 V

Isc ≤93 mA

Ca≥0.051 µF + CCABLE

La≥240 µH + LCABLE

Po≤0.651W

CD = CRITICAL DIMENSION

STANDARD TOLERANCES UNLESS NOTED:

ALL DECIMAL DIMENSIONS ± .005

ALL ANGLES ± 1˚

NO.

ADDED LABELS TO PLUS & MINUS TERMINALS.

ADDED Pi & Po = 0.651W TO BOXES. ECR #21141.

CHANGES BY/DATE

DATE

7-14-06

DATE

7-14-06

DWN BY

DGH

CHKD

CAT

APPD

NAME

ACAD2002

MATERIAL

FINISH

NOTICE: This drawing and the principles and elements of design embodied therein are the exclusive property of DWYER INSTRUMENTS, INC. and are not

to be communicated, disclosed, reproduced or used except as previously authorized in writing by such corporation and must not be submitted to outside

parties for examination without the written consent of said corporation.

BRENT

1-22-07

L23_test:Layout 1 12/7/09 8:48 AM Page 3

MERCOID DIVISION

DWYER INSTRUMENTS, INC.

P.O. BOX 258 • MICHIGAN CITY, IN 46361 U.S.A.

Phone: 219/879-8000 www.dwyer-inst.com

Fax: 219/872-9057 e-mail: [email protected]

L23_test:Layout 1 12/7/09 8:48 AM Page 4

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