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4800C-10-42-25-P25
User manual
14 pgs385.12 Kb0

Tek-Trol 4800C-25-42-25-P34, 4800C-15-42-25-P34, 4800C-50-42-25-P50, 4800C-10-42-25-P25 User manual

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Page 1
Technology Solutions
EK-S
T
UB 4800C
19 mm Submersible Level Transmitter
Instruction Manual
Document Number: IM-4800C
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Table of Contents
1 Safety Instructions .................................................................................................... 2
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 ......................................................................................................................... 5
2 Product Description .................................................................................................. 6
2.1 Introduction ................................................................................................................ 6
2.2 Measuring Principle ..................................................................................................... 6
2.3 Operation .................................................................................................................... 7
2.4 Technical Specification ................................................................................................. 8
2.5 Dimensional Drawings ................................................................................................. 9
2.6 Model Chart................................................................................................................. 9
3 Installation.............................................................................................................. 10
3.1 Considerations to be taken before Installation ............................................................ 10
3.2 Installation Methods .................................................................................................. 10
3.2.1 Installation in the Static Liquid ........................................................................................ 11
3.2.2 Installation in an Open Channel ...................................................................................... 11
4 Electrical Connections ............................................................................................. 12
5 Operation ............................................................................................................... 12
6 Maintenance ........................................................................................................... 13
7 Troubleshooting ...................................................................................................... 13
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1 Safety Instructions
1.1 Intended Use
The Tek-Sub 4800C 0.062 ft Submersible Level Transmitter is used to calculate the level of liquid in congested places, such as borewells and slim-limes, by measuring the hydrostatic pressure.
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 the 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 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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1.4 Packaging, Transportation and Storage
1.4.1 Packaging
The original manufacturer’s package consists of
1. Tek-Sub 4800C 0.062 ft 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.
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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 4800C 0.062 ft Submersible Level Transmitter is only 0.75" in diameter making it ideal for level monitoring in well and borehole applications. Constructed for years of trouble-free service, the Tek-Sub 4800C has welded stainless steel body and nose cap. Featured in Tek-Sub 4800C is a precision ±0.25% of full scale accuracy piezoelectric sensor. Tek-Sub 4800C comes with a choice of polyurethane or PTFE cable materials and is vented for barometric pressure compensation. The vent is covered with a maintenance-free filter , which prevents particulate or water droplets from entering the transmitter.
2.2 Measuring Principle
The Tek-Sub 4800C 0.062 ft Submersible Level Transmitter consists of a sensor attached to a long cable, which is lowered to the bottom of the liquid container. The sensor operates by measuring the hydrostatic pressure of the liquid medium. Hydrostatic pressure (or head pressure) is the pressure exerted by the liquid in the vessel. The hydrostatic pressure measured by the sensor is determined by two parameters: the density and height of the liquid. With liquid density remaining constant, changes in hydrostatic pressure necessarily reflect a difference in liquid level.
Fig.1. Measuring Principle
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2.3 Operation
A typical Tek-Sub 4800C 0.062 ft Submersible Level Transmitter application is shown in the following figure.
Fig.2. Mounting the transmitter
The pressure at the bottom of the tank or body of liquid 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 of 1 PSI at 100 °F. The volume of water or the shape of the tank 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 of 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
10 psig to 50 psig (7 mH2O to 35 mH2O), optional ranges available
Pressure type
Gauge (Vented)
Over pressure
150% FS
Accuracy
0.25% FS
Temperature coefficient -zero
±0.75% FS/°F (typ.), ±1.5% FS/°F (max.) overcompensated temperature range
Temperature coefficient-span
±0.75% FS/°F (typ.), ±1.5% FS/°F (max.) overcompensated temperature range
Long term stability
±0.2% FS/year (typ.), ±0.3% FS/year (max.)
Output signal
4-20mA, RS-485, 0.5 - 4.5 VDC
Power supply (Vs)
12-36 VDC
Load resistance (RL) For current output: RL <(Vs-12)/0.02 ohm
For voltage output: RL > 10 kΩ
Vibration
10g-force (20-2000 Hz)
Shock
100g-force (10 ms)
Cycles
10x10^6 cycles
Insulation resistance
100MΩ/50 VDC
Compensated temperature range
PTFE: 32 °F to 140 °F (0 °C to 60 °C)
Operating temperature range
PTFE: 32 °F to 160 °F (0 °C to 70 °C)
Storage temperature range
-40 °F to 257 °F (-40 °C to 125 °C)
Housing
304 SS
Cable
PTFE or Polyurethane
Diaphragm
316L SS
Seal Ring
Viton or NBR
Oil Filling
Silicone Oil
Net weight
0.49 lb (225 g)
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2.5 Dimensional Drawings
Fig.3 Dimension Drawing
2.6 Model Chart
Tek-Sub 4800C
19 mm Submersible Level Transmitter
10
10 psig ( 7 mH2O)
15
25
15 psig (10.5 mH2O)
25 psig (17.5 mH2O)
50
50 psig (35 mH2O)
42
4-20 mA
45
0.5-4.5 VDC
49
RS485
25
0.25% FS
P25
75' of Polyurethane Cable
P34
100' of Polyurethane Cable
P50
T25
150' of Polyurethane Cable
70' of PTFE Cable
T34
100' of PTFE Cable
T50
150' of PTFE Cable
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3 Installation
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
• Installation must comply with local installation requirements and local 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 4800C is suitable for static, as well as flowing liquid level measurement applications. The transmitter is factory calibrated and ready for operation without adjustment
• 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.
• Remove the transmitter from the tank or use a stilling well while pumping the
liquid.
3.2.2 Installation in Flowing Liquid
Fig 5 shows the installation method used in case of 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 of Tek-Sub 4800C
0.062 ft 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 (RLmax) for the DC power supply voltage (Vs) is 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.
5 Operation
This section covers operation techniques and guidelines.
• Tek-Sub 4800C 0.062 ft 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 then operate the device.
• Wait for at least 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 4800C 0.062 ft Submersible Level Transmitter does not require regular maintenance, 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.
7 Troubleshooting
This section provides troubleshooting techniques for most common operating problems.
Symptom
Corrective Action
No Output or Low Output
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.
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