Edwards VS16K Manual de usuario
D059-15-880
Issue D Original
Instruction Manual
Adjustable Vacuum Interlock Switch VS16K
Description Item Number
Adjustable Vacuum Interlock Switch VS16K D059-15-000
© Edwards Limited 2009. All rights reserved. Page i
Edwards and the Edwards logo are trademarks of Edwards Limited.
D059-15-880 Issue D
Contents
Section Page
1 INTRODUCTION ....................................................................................1
1.1 Scope and definitions ................................................................................................... 1
1.2 Description ................................................................................................................ 1
2 TECHNICAL DATA .................................................................................2
2.1 Operating conditions .................................................................................................... 2
2.2 Performance .............................................................................................................. 2
2.3 Mechanical data .......................................................................................................... 2
2.4 Electrical data ............................................................................................................ 2
2.5 Product item number ................................................................................................... 3
3 INSTALLATION .....................................................................................4
3.1 Unpacking and inspection .............................................................................................. 4
3.2 General .................................................................................................................... 4
3.3 Connection to the Vacuum System .................................................................................... 4
3.4 Connection to the Electrical Circuit .................................................................................. 4
4 OPERATION ........................................................................................6
4.1 Adjustment ............................................................................................................... 6
5 MAINTENANCE .....................................................................................7
6 STORAGE AND DISPOSAL .........................................................................8
6.1 Storage .................................................................................................................... 8
6.2 Disposal ....................................................................................................................8
Index ................................................................................................9
For return of equipment, complete the HS Forms at the end of this manual.
gea/0035/02/09
D059-15-880 Issue D
Page ii © Edwards Limited 2009. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
Contents
Illustrations
Figure Page
1 Vacuum switch plug connections ...................................................................................... 5
2 Dimensions of VS16K vacuum switch .................................................................................. 7
Tables
Table Page
1 Maximum switch ratings ................................................................................................ 2
© Edwards Limited 2009. All rights reserved. Page 1
Edwards and the Edwards logo are trademarks of Edwards Limited.
INTRODUCTION
D059-15-880 Issue D
1 INTRODUCTION
1.1 Scope and definitions
This manual provides installation, operation and maintenance instructions for the Edwards VS16K Adjustable Vacuum
Switch. Read this manual before attempting to install and operate the VS16K.
This manual contains essential safety information which supplements the safety features of the VS16K. Safety
procedures are highlighted as WARNING and CAUTION instructions. You must obey these instructions. The use of
WARNINGS and CAUTIONS is defined below.
CAUTION
Cautions are given where failure to observe the instruction could result in damage to the equipment, associated
equipment and process.
1.2 Description
The Edwards VS16K adjustable vacuum switch contains a pressure sensitive diaphragm which operates a non latching
snap action microswitch. The switch can be used to operate an electrical circuit when the system pressure rises or
falls through an operator-determined pressure set point between 30 and 1000 mbar.
The diaphragm is enclosed within the vacuum switch housing which is surrounded by atmospheric pressure and is
coupled to the vacuum system by a NW16 Flange. The absolute switch point pressure will therefore vary by the same
amount as the atmospheric pressure. This must be allowed for when setting the switch point close to the low pressure
end of the range.
The vacuum switch is factory set to operate at about 30 mbar on falling pressure.
WARNING
Warnings are given where failure to observe the instruction could result in injury or death to
people.
WARNING
This switch should not be used for safety critical applications. For many interlock applications the
Edwards IS16K may be more suitable.
D059-15-880 Issue D
Page 2 © Edwards Limited 2009. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
TECHNICAL DATA
2 TECHNICAL DATA
2.1 Operating conditions
2.2 Performance
2.3 Mechanical data
2.4 Electrical data
Maximum switch ratings for different loads and voltages:
Temperature range - operating -5°C to 40°C
Temperature range - storage -20°C to 70°C
Relative humidity (non condensing) 10 to 90%
Maximum operating altitude 3000 m
Installation category (IEC1010) 2 (IEC664/664A)
Pollution category (IEC1010) 2
Enclosure rating IP40
Leak rate <1 x 10-9 mbar litre/sec-1
Maximum overpressure 1 bar gauge (2 bar absolute)
Switch point range 30 to 1000 mbar
Switch point differential less than 30 mbar
Weight (unpacked) 0.5 kg
Weight (packed) 0.6 kg
Vacuum connection NW16 Flange
Volume added to vacuum system 7 cm3
Materials exposed to vacuum system Stainless steel and Armco 17/7PH
Electrical connection mPm 283 plug
Accessory supplied mPm 183 mating electrical socket
Table 1 - Maximum switch ratings
Volts
a.c. 50/60Hz Resistive Load
Amps Motor Load
(HP)
125 10 0.125
250 10 0.25
d.c. volts
125 0.5 -
250 0.25 -
© Edwards Limited 2009. All rights reserved. Page 3
Edwards and the Edwards logo are trademarks of Edwards Limited.
TECHNICAL DATA
D059-15-880 Issue D
2.5 Product item number
Description Item Number
Adjustable vacuum switch D059-15-000
D059-15-880 Issue D
Page 4 © Edwards Limited 2009. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
INSTALLATION
3 INSTALLATION
3.1 Unpacking and inspection
Remove all packing materials and protective coversand check the VS16K for damage. If the VS16K is damaged, notify
your supplier and the carrier in writing within three days; state the Item Number of the VS16K together with your
order number and your supplier's invoice number. Retain all packing materials for inspection. Do not use the VS16K.
3.2 General
The vacuum switch should be mounted as close as possible to the point at which the pressure is to be measured. Use
a short branch tube with an internal diameter no less than that of the switch vacuum connection. Long, narrow and
angled connections can cause significant errors.
This equipment is not protected from dripping water from above, unless mounted with the vacuum flange pointing
downwards.
3.3 Connection to the Vacuum System
The vacuum switch may be mounted in any orientation but mounting with the vacuum switch vertical will prevent
the possibility of debris falling into the vacuum port and affecting the performance of the switch.
3.4 Connection to the Electrical Circuit
CAUTION
Ensure that the circuit connected to the vacuum switch is suitably fused to prevent the switch contact rating
being exceeded. The fuse rating must not exceed 10 amps.
WARNING
Do not allow the internal pressure to be higher than 1 bar gauge (2 bar absolute). If the pressure
in your system can be higher than 1 bar gauge, you must fit a suitable pressure relief valve.
Overpressure of the switch could cause injury to persons.
WARNING
Ensure that the electrical installation of the Vacuum Switch conforms with your local and national
safety requirements. It must be connected to a suitably fused and protected electrical supply and
a suitable earth point.
© Edwards Limited 2009. All rights reserved. Page 5
Edwards and the Edwards logo are trademarks of Edwards Limited.
INSTALLATION
D059-15-880 Issue D
Connect the vacuum switch to the equipment using the four pole mPm connector supplied. The contacts on this
connector are internally wired as follows:-
Figure 1 - Vacuum switch plug connections
CAUTION
To ensure that the socket cable gland strain relief is effective a cable with a minimum diameter of 6 mm must
be used.
Select a three or four core cable of a rating suitable for the power supply to be switched. One core should be
coloured green/yellow for the earth connection.
Thread the cable through the cable gland on the mPm socket cover and connect to the appropriate terminals as
shown on the diagram.
Tighten the cable gland and connect the socket to the switch using the sealing gasket and locking screw provided.
Earth Connection.
Com Common.
Lo Contact made when system pressure is lower than set point.
Hi Contact made when system pressure is higher than set point.
D059-15-880 Issue D
Page 6 © Edwards Limited 2009. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
OPERATION
4OPERATION
4.1 Adjustment
The pressure at which the switch operates is controlled by the adjusting screw located under the removable plug
located on the top of the vacuum switch cover.
Turning the screw clockwise reduces the switch point pressure.
The following procedure can be used to set, change or measure the switch point at any time:-
1. Externally disconnect the electrical supply from the vacuum switch.
2. Set and maintain the system pressure, measured by a vacuum gauge, to the desired switch point pressure.
3. Unscrew and remove the mPm socket. Remove the plug covering the adjusting screw.
4. Connect an electrical continuity meter between the pin marked 'com' and The pin marked 'Hi' or 'Lo' as
appropriate to the application.
5. Turn the adjusting screw until the switch just operates.
6. Change the system pressure and check the operation of the vacuum switch.
Note: The switching differential (between rising and falling pressure) is about 30 mbar.
7. Repeat steps 5 and 6 as necessary.
8. Replace the plastic plug and reconnect the mPm socket.
9. Reconnect the electrical supply.
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