Page 1
GF Piping Systems
Instruction manual
2284 Ultrasonic level switch
Georg Fischer Piping Systems Ltd 8201 Schaffhausen,
Switzerland Phone +41(0)52 631 30 26 /
info.ps@georgfischer.com / www.gfps.com
GFDO_6378_4 (07.14)
© Georg Fischer Rohrleitungssysteme AG
8201 Schaffhausen / Switzerland, 2014
Printed in Switzerland
BSPT
British Standard Pipe Taper
EMC
Electromagnetic compatibility
PPS
Polyphenylene sulfide
PVC
Polyvinyl chloride
SPCO
Single pole, centre off / Switch with stable, contactless middle position
Category
Value
Material
Polyphenylene sulfide (PPS)
Working pressure
5 bar
Working/ambient temperature
-20°C to +70°C
Minimum SG
0.50
Maximum viscosity
5,000 cST at 20°C
Switching behavior
50 ms from dry to wet
500 ms from wet to dry
Hysteresis
< 4 mm
Reproducibility
±2 mm
Total length
110 mm
Length within the tank
79 mm (plus width of hexagonal collar when
mounted inside tank)
Sensor diameter
22 mm
Pipe thread
¾" BSPT, 1" BSP, 1" NPT
Switching function
SPCO relay, activated when wet
Maximum current to be switched
1 A at 30 V resistive
0.25 A at 30 V inductive
Maximum switching voltage
30 V
Voltage supply
18 – 30 V AC or DC
Current consumption
Dry
10 mA nominal
Wet
25 mA maximum
Cable length and type
3 m, 5-wire 7/0.2 mm
Cable sheath
PVC
Protection rating
IP66/IP68 for cable length of 3 m
Meets the requirements of EMC Directive 2014/30/EC and standard EN 61326
(Electrical equipment for measurement, control and laboratory use – EMC
requirements – Part 1: General requirements)
Not suitable for use in intrinsically safe circuits.
Not suitable to directly start larger motors.
l1
110 mm
d
ø 22 mm
1
Nominal switching level
l2
79 mm
2
Tapered pipe thread
l3
6 mm 3 Hexagonal collar (AF32 – AF36)
l4
7 mm 4 Cable with PVC sheath
Observe instruction manual
The instruction manual is part of the product and an important element within the safety
concept.
Read and observe the instruction manual.
Always have the instruction manual available at the product.
Pass on the instruction manual to all subsequent users of the product.
1 Intended use
Ultrasonic level switch 2284 is used to monitor the level of liquids to which the material
used is resistant.
2 About this document
This document contains all necessary information for the installation and operation of the
product.
Abbreviations
7 Technical Data
3 Safety and responsibility
Only use the product as intended, see intended use.
Do not use the product if it is damaged or faulty. Throw out the product immediately if
it is damaged.
Make sure that the piping system has been installed professionally and that it is
inspected regularly.
The product must only be installed by persons who have the required training,
knowledge, and experience.
Regularly train personnel on all questions pertaining to the locally accepted
regulations on occupational safety and environmental protection, especially on
pressure-retaining pipelines.
The personnel is responsible for the following measures:
Know, understand and follow the instruction manual and the advices therein.
4 Delivery Contents
2282 Ultrasonic level switch
Instruction Manual
5 Transport and storage
Protect the product against external force during transport (impact, stroke, vibrations,
etc.).
Transport and/or store the product in unopened, undamaged original packaging.
Protect the product from dust, dirt, moisture as well as heat and ultraviolet radiation.
Ensure that the product has not been damaged by either mechanical or thermal
influences.
Check the product for transport damage before assembly.
6 Function
Ultrasonic level switch 2284 is made entirely out of PPS, which is noncorrosive in most
liquids. A piezoelectric crystal is embedded in each of the two sensor points. The
transmitting crystal emits an ultrasonic signal but the receiving crystal only receives this
signal at the sufficient strength when the gap between the transmitter and receiver is filled
with a liquid. The integrated electronics evaluate the signal that is received and close the
relay contact when the signal is detected (liquid between the transmitter and receiver).
Light, no moving parts, and maintenance-free apart from a few exceptions.
Can be mounted in any position in the tank.
The sensor body has a tapered thread on both sides of the hexagonal collar. It can
therefore be mounted either inside or outside the tank.
The connection cable for the integrated printed circuit board is sealed in the sensor
body.
Suitable for high/low-level applications which signal an alarm via a potential-free
contact or contactless transistor output or which form part of a pump control.
8 Dimensions
9 Installation
Checking the installation conditions
Are the working pressure and temperature values being observed?
Checking the mounting position
The ultrasonic level switch can be mounted at almost any angle in the tank. The
requirements are as follows:
The liquid can flow out of the sensor gap.
The distance between the sensor gap and tank walls (other fittings in the tank) must be
at least 25 mm to ensure that no pockets of air or liquid can form.
Turbulence from around inlet/outlet valves or agitators must be avoided.
Do not install the product directly in the flow path. Install baffles, if necessary.
Page 2
Georg Fischer Piping Systems Ltd 8201 Schaffhausen,
Switzerland Phone +41(0)52 631 30 26 /
info.ps@georgfischer.com / www.gfps.com
GFDO_6378_4 (07.14)
© Georg Fischer Rohrleitungssysteme AG
8201 Schaffhausen / Switzerland, 2014
Printed in Switzerland
1
Red, +Ve
3
Green, NC contact
5
Blue, -Ve
2
Yellow, NO contact
4
White, common
The ultrasonic level switch must be cleaned regularly if the liquid
contains particulate matter that may obstruct the gap in the switch.
The ultrasonic level switch is not suitable for steam cleaning.
Risk of injury due to failure to carry out maintenance work correctly!
The occupational safety regulations must be observed if hazardous, flammable, or
explosive media are used.
Only perform maintenance on depressurized systems.
Pay attention to the level of the medium in the tank.
Art. no.
Type
Designation
159 300 270
2284-Q-4BC
PPS enclosure, cable, 3/4" BSP
159 300 272
2284-Q-4NC
PPS enclosure, cable, 1" NPT
159 300 274
2284-Q-4BC
PPS enclosure, cable, 1" BSP
Media that is detrimental to people's health and the environmental may escape!
Risk of personal injury or damage to the environment caused by these media.
Wear the prescribed protective clothing.
Collect any media that escapes and dispose of it in accordance with local regulations.
Consult the safety data sheet.
Parts of the product may be contaminated with media that are harmful to health
and the environment meaning that simple cleaning is not sufficient!
Risk of personal injury and damage to the environment caused by these media.
Prior to disposing of the product:
Collect leaking media and dispose of it according to the local regulations.
Consult the safety data sheet.
Neutralize any media residue that is present in the product.
Separate materials (plastics, metals, etc.) and dispose of them according to the
local regulations.
A product marked with this symbol must be sent for separate
collection of electrical and electronic devices.
If you have questions regarding the disposal of the product, please
contact your national GF Piping Systems representative.
WARNING
CAUTION
CAUTION
Installing the ultrasonic level switch mechanically
The cable for the ultrasonic level switch must be able to be turned during assembly; it
must not be connected or secured in any other way.
Make sure that the thread in the tank is free of contamination.
If necessary, use PTFE tape or an equivalent pipe sealing tape.
Make sure that the cable does not become twisted, kinked, or damaged.
Carefully insert the ultrasonic level switch into the opening and tighten it hand-tight.
Tighten the ultrasonic level switch an additional 1/6 of a revolution on the hexagonal
collar so that the gap is as vertical as possible. Use the marking on the hexagonal
collar as a guide.
Check whether the connection is tight.
Connecting the ultrasonic level switch electrically
11 Ordering information
12 Dismantling
Make sure that the connection cable is de-energized and can be freely rotated.
Make sure that the tank is depressurized and has been drained to a level that is at
least below that of the sensor mounting position.
13 Disposal
Before disposing of the different materials, separate them into recyclables, normal
waste, and special waste.
Comply with local legal regulations and provisions when recycling or disposing of the
product, the individual components, and the packaging.
Comply with national regulations, standards, and guidelines.
Ensure that the voltage values for the ultrasonic level switch correspond to those for
the system.
Make sure that the supply cable is de-energized.
Make sure that the minimum bending radius of 50 mm is observed when installing the
connection cable.
Make sure that the cables used do not cause a high voltage drop.
Route the cables to the connection point and secure them at regular intervals using
cable ties or similar.
Connect the connection cable for the ultrasonic level switch to the supply cable or a
weatherproof connection box.
The ultrasonic level switch is operational once the supply voltage has been switched on.
The switching process can be tested as follows:
- Immerse the sensor into a cup with water.
- This causes the switching output to switch.
10 Maintenance
14 Disclaimer
The technical data are not binding. They neither constitute expressly warranted
characteristics nor guaranteed properties nor a guaranteed durability. They are subject to
modification. Our General Terms of Sale apply.
Loading...