Dwyer SBLT2 User Manual download pdf

Series SBLT2 Submersible Level Transducer

Specifications - Installation and Operating Instructions

Bulletin L-28

The SBLT2 Submersible Level Transducer is manufactured for

years of trouble free service. The transmitter consists of a

piezoresistive sensing element, encased in a 316 SS housing.

Superior lightning and surge protection utilizing dual arrestor

technology, grounded to case, eliminating both power supply surges

and lightning ground strike transients (surge protection is not

guaranteed and is not covered by warranty). Bullet nose design

protects diaphragm from damage. Comes equipped with a 270-

pound tensile strength, shielded, vented cable. Ventilation tube in

the cable automatically compensates for changes in atmospheric

pressure above the tank.

APPLICATIONS

• Well monitoring; Ground water monitoring; Environmental remediation;

Surface water monitoring; Down hole; Water Tanks.

ELECTRICAL INSTALLATION

An external power supply delivering 13-30 VDC with minimum current

capability of 40 mA DC (per transmitter) is required to power the control

loop. See figure below for connection of the power supply, transmitter

and receiver.

The maximum receiver load resistance (RLmax) for the DC power

supply voltage (Vsup) is expressed by the formula:

RLmax = Vsup – 13V

0.02A

Shielded cable is recommended for control loop wiring.

SPECIFICATIONS

Service: Compatible liquids.

Wetted Materials: 316 SS, 316L SS, epoxy adhesive; Cable: Polyether

polyurethane or ETFE; Bullet Nose: PVC.

Accuracy: ±0.25% of full scale.

Temperature Limit: 0 to 150°F (-18 to 66°C).

Compensated Temperature Range: 0 to 140°F (-18 to 60°C).

Thermal Effect: Less than ±0.02%/°F.

Pressure Limit: 2X full scale.

Power Requirement: 13 to 30 VDC.

Output Signal: 4 to 20 mA DC, 2-wire.

Response Time: 50 ms.

Max. Loop Resistance: 850 ohms at 30 VDC.

Electrical Connections: Wire pigtail.

Mounting Orientation: Suspended in tank below level being

measured.

Weight: 2.2 lb (1.0 kg).

Electrical Protection: Lightning and surge protection.

MERCOID DIVISION

DWYER INSTRUMENTS, INC.

P.O. BOX 258 • MICHIGAN CITY, IN 46360 U.S.A.

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

Fax: 219/872-9057 e-mail: info@dwyer-inst.com

-45/64

(

170.26)

(

Ø25.40)

1/2 NPT

UBMERSIBLE

ABLE

BREATHER

TUBE

Example

Construction

Range

Cable Length

Options

SBLT

SBLT2

XXX

ETFE

SBLT2-20-40

Bullet style submersible level

transmitter, Polyurethane cable

In psi (5000 psi maximum)

In feet (1500 feet maximum)

ETFE cable

Model Number Guide

PRESSURE

TRANSDUCER

RED

BLACK

SHIELD

RECEIVER

POWER

SUPPLY

13-30 VDC

WARNING:

A voltage potential between the ground wire of the unit and the ground

of other equipment can lead to electrolytic corrosion. Always ensure the

grounding system provides an equipotential between the transmitter and

the earthing ground connection. Avoid using the power system protective

ground since this will often have a significant potential difference to the

transmitter ground. Also note that dissimiliar metals in the ground system

may cause electrolysis corrosion of the transmitter or other components

in the ground system.

During installation, connect a voltmeter or ammeter between the shield

ground wire and the grounding connection. If there is a measurable

voltage or current electrolytic corrosion may be a serious possibility. If

there is a potential difference then some isolation system will be

required. Improper grounding may lead to damage or poor signal

integrity.

MERCOID DIVISION 1

Summary of Contents

Page 1 - MERCOID DIVISION

Series SBLT2 Submersible Level TransducerSpecifications - Installation and Operating InstructionsBulletin L-28The SBLT2 Submersible Level Transducer i

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