Tek-Trol 4800B-15-42-05-P20, 4800B-10-42-05-P14, 4800B-05-42-05-P14, 4800B-20-42-05-T20, 4800B-20-42-05-P20 User manual

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TEK-S UB 4800B

Submersible Level Transmitter

Instruction Manual

Document Number: IM-4800B

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Table of Contents

Safety Instructions .................................................................................................... 2

1

1.1 Intended Use ............................................................................................................... 2

1.2 Safety Instructions from the Manufacturer ................................................................... 2

1.2.1 Disclaimer .......................................................................................................................... 2

1.2.2 Product Liability and Warranty ......................................................................................... 2

1.2.3 Information Concerning the Documentation .................................................................... 2

1.3 Safety Precautions ....................................................................................................... 2

1.4 Packaging, Transportation and Storage ......................................................................... 4

1.4.1 Packaging ........................................................................................................................... 4

1.4.2 Transportation................................................................................................................... 4

1.4.3 Nameplate ......................................................................................................................... 4

2 Product Description .................................................................................................. 5

2.1 Introduction ................................................................................................................ 5

2.2 Measuring Principle ..................................................................................................... 5

2.3 Operation .................................................................................................................... 6

2.4 Technical Specification ................................................................................................. 7

2.5 Dimensional Drawings ................................................................................................. 8

2.6 Model Chart................................................................................................................. 8

3 Installation................................................................................................................ 9

3.1 Considerations to be taken before Installation .............................................................. 9

3.2 Installation Methods .................................................................................................... 9

3.2.1 Installation in the Static Liquid ........................................................................................ 10

3.2.2 Installation in an Open Channel ...................................................................................... 10

4 Electrical Connections ............................................................................................. 11

5 Operation ............................................................................................................... 12

6 Maintenance ........................................................................................................... 13

7 Troubleshooting ...................................................................................................... 14

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Instruction Manual
Tek-Sub 4800B

1 Safety Instructions

1.1 Intended Use

The Tek-Sub 4800B Submersible Level Transmitter is used to calculate the level of

liquid in a tank by measuring the hydrostatic pressure in the tank.

1.2 Safety Instructions from the Manufacturer

1.2.1 Disclaimer

The manufacturer will not be held accountable for any damage that happens by using

its product, including, but not limited to direct, indirect, or incidental and

consequential damages.

Any product purchased from the manufacturer is warranted in accordance with the

relevant product documentation and Terms and Conditions of Sale.

The manufacturer has the right to modify the content of this document, including the
disclaimer, at any time for any reason without prior notice, and will not be
answerable in any way for the possible consequence of such changes.

1.2.2 Product Liability and Warranty

The operator shall bear authority for the suitability of the device for the specific

application. The manufacturer accepts no liability for the consequences of misuse by

operator. Wrong installation or operation of the devices (systems) will cause the

warranty to be void. The respective Terms and Conditions of Sale, which forms the basis

for the sales contract shall also apply.

1.2.3 Information Concerning the Documentation

To prevent any injury to the operator or damage to the device, it is essential to read

the information in this document and the applicable national standard safety

instructions. This operation manual contains all the information that is required in

various stages, such as product identification, incoming acceptance and storage,

mounting, connection, operation and commissioning, troubleshooting,

maintenance, and disposal.

1.3 Safety Precautions

You must read these instructions carefully prior to installing and commissioning the

device. These instructions are an important part of the product and must be kept for

future reference. Only by observing these instructions, optimum protection of both

personnel and the environment, as well as safe and fault-free operation of the device can

the

be ensured.

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For additional information that is not discussed in this manual, contact
the manufacturer.

Warnings and Symbols Used

The following safety symbol marks are used in this operation manual and on
the instrument.

WARNING

Indicates a potentially hazardous situation which, if not avoided, could
result in serious injury or death.

CAUTION

Indicates a potentially hazardous situation which, if not avoided, may result in minor
or moderate injury. It may also be used to alert against unsafe practices.

NOTE

Indicates that operating the hardware or software in this manner may damage it or
lead to system failure.

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Instruction Manual
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1.4 Packaging, Transportation and Storage

1.4.1 Packaging

The original manufacturer’s package consists of

1. Tek-Sub 4800B Submersible Level Transmitter

2. Documentation

1.4.2 Transportation

• Avoid impact shocks to the device and prevent it from getting wet during
transportation.

• Verify local safety regulations, directives, and company procedures with respect
to hoisting, rigging, and transportation of heavy equipment.

• Transport the product to the installation site using the original manufacturer’s
packing whenever possible.

1.4.3 Nameplate

The nameplate lists the order number and other important information, such as
design details and technical data.

NOTE

Check the device nameplate to ensure that the device is delivered according to
your order. Check for the correct supply voltage printed on the nameplate.

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2 Product Description

This section covers the reference and specification data, as well as the ordering
information.

2.1 Introduction

The Tek-Sub 4800B Submersible Level Transmitter is a high-performance level
transmitter specially designed for measuring the level of liquids and slurries. The
transmitter has a highly accurate silicon piezoresistive pressure sensor as a sensing
element. It is capable of continuously sensing and measuring liquid level with high
precision.

Tek-Trol’s Submersible Level Transmitters have several level ranges, output options,
and custom cable lengths, ensuring a perfect fit for new or existing installations. They
are frequently used with a SCADA, PLC, or compatible display/control system for
liquid level indication or control.

2.2 Measuring Principle

The Tek-Sub 4800B Submersible Level Transmitter consists of a sensor attached to a
long cable, which is lowered to the bottom of a tank or well. The sensor operates by
measuring the hydrostatic pressure of the liquid. Hydrostatic pressure (or head
pressure) is the pressure exerted by the liquid in the tank or well. The hydrostatic
pressure measured by the sensor is determined by two parameters: the density and
the height of the liquid. With liquid density remaining constant, a change in
hydrostatic pressure necessarily reflects a difference in liquid level.

Fig.1. Measuring Principle

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Instruction Manual
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2.3 Operation

A typical Tek-Sub 4800B Submersible Level Transmitter application is shown in the
following figure.

Fig.2. Mounting the transmitter

The pressure at the bottom of the tank is related to the height of the liquid. This
pressure is called hydrostatic pressure or head pressure. Typical units for
measurement of hydrostatic pressure are inches, feet, or meters of water column. In
a water column, the hydrostatic pressure of 27.7" w.c. is approximately equivalent to
1 PSI. The volume of water or shape of the tank or vessel does not affect the
hydrostatic head pressure; it is the height of water that affects the pressure.
Whether it is in a large water tank or a small bucket of water, the hydrostatic
pressure 27.7" w.c. is the same.

Modern PLC’s and HMI’s can calculate the liquid level of a tank by entering the
geometry of the tank and the specific gravity of the liquid.

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2.4 Technical Specification

Pressure range

5 psig to 20 psig (3.5 mH2O to 14 mH2O), other ranges
available

Pressure type

Gauge

Over pressure

150% FS

Accuracy

±0.5% FS

Temperature coefficient-zero

±0.75% FS (typ.), ±1.5% FS (max.) Over compensated
temperature range

Temperature coefficient-span

temperature range

Long term stability

±0.2% FS/year (typ.), ±0.3% FS/year (max.)

Output signal

4-20 mA, RS-485, 0.5-4.5 VDC

Power supply (Vs)

12 to 36 VDC

Load resistance (RL)

RL<(Vs-12)/0.02A

Vibration

10g-force (20-2000 Hz)

Shock

100g-force (10 ms)

Cycles

10x10⁶ cycles

Insulation resistance

100 MΩ/50 VDC

Compensated temperature range

32 °F to 140 °F (0 °C to 60 °C)

Storage temperature range

-40 °F to 257 °F (-40 °C to 125 °C)

Housing

304 SS

Cable

PTFE or Polyurethane

Diaphragm

316L SS

Protection

IP68

Seal ring

Viton

Oil filling

Silicone oil

Weight

0.9 lbs (408 g)

±0.75% FS (typ.), ±1.5% FS (max.) Over compensated

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Instruction Manual
Tek-Sub 4800B

2.5 Dimensional Drawings

05

5 psig (3.5 mH2O)

Options

15

15 psig (10.5 mH2O)

20

20 psig (14 mH2O)

42

4-20 mA

45

0.5-4.5 VDC

49

RS-485

05

0.5% FS

P14

40' of Polyurethane Cable

P20

60' of Polyurethane Cable

T14

40' of PTFE Cable

T20

60' of PTFE Cable

T34

100' of PTFE Cable

2.6 Model Chart

Example Tek-Sub 4800B 05 42 05 P14 Tek-Sub 4800B-05-42-05-P14

Series

Range

Output

Accuracy

Cable Length

and Type

Tek-Sub 4800B Submersible Level Transmitter

10

43

P34

10 psig ( 7 mH2O)

4-20 mA with HART

100' of Polyurethane Cable

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3 Installation

Installation must comply with local installation requirements and local

This section covers instructions on installation and commissioning. Installation of the
device must be carried out by trained, qualified specialists authorized to perform such
work.

CAUTION

•

electrical code.

• Do not switch on the power supply to the transmitter while installing it. It may
cause injury to the operating personnel

• Prevent mud and sand from accumulating on the sensor probe. Otherwise, the
transmitter would be damaged.

3.1 Considerations to be taken before Installation

Before installation make sure that:

• The static pressure produced by the liquid at the installation site does not
exceed the transmitter’s FS range.

• The measuring liquid is compatible with the transmitter’s construction material.

• While mounting the transmitter, avoid areas subject to electrical noise,

excessive vibrations and radiant heat.

3.2 Installation Method

Tek-Sub 4800B Submersible Level Transmitter is suitable for static, as well as flowing
liquid level measurement applications.

• Ensure that the measuring liquid is compatible with the transmitter’s

construction material.

• Insert the transmitter vertically down in the measurement container.

• Ensure that the transmitter is completely immersed in the liquid for maximum

accuracy.

• Ensure the protection cap holes are not blocked due to suspended particles in
the measuring liquid.

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3.2.1 Installation in Static Liquid

Fig.4 shows the installation method used in case of static liquid.

Fig.4. Installation in static liquid

Place the transmitter away from liquid resource to avoid effects of vibration and
pressure influence. A stilling well is recommended for the best results.

3.2.2 Installation in Flowing Liquid

Fig 5 shows the installation method used in case of flowing liquid in an open channel,
for example, reservoir area or river channel.

Fig.5. Installation in flowing liquid

A stilling well is recommended when there is a flowing liquid. A stilling well will
dampen disruptions and provide a steady level for an accurate measurement.

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4 Electrical Connections

This section provides general information on the electrical connections the of Tek-Sub
4800B Submersible Level Transmitter.

An external power supply delivering 12-36 VDC with minimum current capability of 40
mA DC (per transmitter) is required to power the control loop.

Fig.6 illustrates the connection of the power supply, transmitter and receiver.

Fig.6. Power supply connections

The maximum receiver load resistance (R

) for the DC power supply voltage (Vs) is

Lmax

expressed as:

RLmax = Vs – 12V / 0.02A

Use of a shielded cable is recommended for control loop wiring.

Ensure proper ground connection. Improper grounding may lead to damage or poor
signal integrity.

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Instruction Manual
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5 Operation

This section covers operation techniques and guidelines.

• Tek-Sub 4800B Submersible Level Transmitter can be operated without any
adjustment.

• Make sure that the installation and electrical connections are done properly
before operation.

• Connect the excitation and operate the device.

• Wait for atleast 30 minutes after connecting the excitation for reliable output

signal.

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6 Maintenance

This section covers maintenance techniques and guidelines.

The Tek-Sub 4800B Submersible Level Transmitter does not require to be maintained
regularly, however the following points must be observed for better operation and
reliability.

• Make sure that the wire connection is reliable.

• Make sure that the cable is not damaged.

• Clean the protection cap and diaphragm space regularly.

• Do not pull the cables violently or poke the diaphragm with metal objects.

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7 Troubleshooting

Symptom

Corrective Action

No Output or

Check the polarity of the terminals. Check for intermittent
shorts, open circuits and multiple grounds.

Check that the adequate voltage is supplied to the
transmitter. The transmitter requires 12 to 36 VDC.

Verify sensor positioning and consider sensor cleaning.

High Output

Check for dirty or defective terminals and interconnecting
pins.

Check that the adequate voltage is supplied to the
transmitter. The transmitter requires 12 to 36 VDC.

Check the sensor limits to ensure that input to the sensor
is within the range.

Erratic Output

Check that the adequate voltage is supplied to the
transmitter. The transmitter requires 12 to 36 VDC.

Check the polarity of the terminals. Check for intermittent
shorts, open circuits and multiple grounds.

Verify sensor positioning and consider sensor cleaning.

This section provides troubleshooting techniques for most common operating
problems.

Low Output

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