Edwards ATC-E Manuale utente
D351-08-880
Issue K
Original Instructions
Instruction Manual
Active Thermocouple Gauge
Description Item Number
ATC-E D351-08-000
This product has been manufactured under a quality management system certified to ISO 9001:2008
Declaration of Conformity
We, Edwards Limited,
Crawley Business Quarter,
Manor Royal,
Crawley,
West Sussex, RH10 9LW, UK
declare under our sole responsibility, as manufacturer and person within the EU authorised
to assemble the technical file, that the product(s)
Active Thermocouple Gauge D351-08-000
to which this declaration relates is in conformity with the following standard(s) or other
normative document(s)
EN61326-2-3: 2013 Electrical equipment for measurement, control and laboratory
(Class B Emissions, Use. EMC requirements. Particular requirements. Test
Basic Immunity) configuration, operational conditions and performance criteria
for transducers with integrated or remote signal conditioning
EN50581: 2012 Technical Documentation for the Assessment of Electrical and
Electronic Products with respect to the Restriction of Hazardous
Substances
and fulfils all the relevant provisions of
2014/30/EU Electromagnetic Compatibility (EMC) Directive
2011/65/EU Restriction of Certain Hazardous Substances (RoHS) Directive
2012/19/EU Waste Electrical and Electronic Equipment (WEEE) Directive
Note: This declaration covers all product serial numbers from the date this Declaration was
signed onwards.
19.08.2015, Eastbourne
Larry Marini, Senior Technical Manager Date and Place
P200-02-560 Issue H
© Edwards Limited 2015. All rights reserved. Page i
Edwards and the Edwards logo are trademarks of Edwards Limited.
Contents
D351-08-880 Issue K
Contents
Section Page
1 Introduction .......................................................................................1
1.1 Scope of this manual .................................................................................................... 1
1.2 General .................................................................................................................... 1
2 Technical data ....................................................................................3
2.1 Operating conditions .................................................................................................... 3
2.2 Performance .............................................................................................................. 3
2.2.1 Output signal .............................................................................................................3
2.2.2 setpoint ................................................................................................................... 3
2.2.3 Gauge identification signal ............................................................................................. 3
2.3 Mechanical data .......................................................................................................... 4
2.4 Electrical data ............................................................................................................ 4
2.4.1 Electrical supply data ................................................................................................... 4
2.4.2 Electronic interface ..................................................................................................... 4
2.5 Thermocouple gauge tubes ............................................................................................. 4
2.5.1 Materials exposed to vacuum .......................................................................................... 4
2.5.2 Colour coding .............................................................................................................5
2.5.3 Pressure range ........................................................................................................... 5
2.5.4 Thermocouple temperature ............................................................................................ 5
2.5.5 Maximum internal overpressure ....................................................................................... 5
3 Installation .........................................................................................7
3.1 Unpacking and inspection .............................................................................................. 7
3.2 Connection to the vacuum system .................................................................................... 7
3.3 Positioning the gauges .................................................................................................. 7
3.4 Electrical connection .................................................................................................... 7
3.5 Gauge setpoint trip ...................................................................................................... 7
3.5.1 Adjusment ................................................................................................................ 7
3.5.2 Trip output ................................................................................................................ 8
4 Operation ........................................................................................ 13
4.1 Reading the pressure ...................................................................................................13
4.2 Gas dependency .........................................................................................................13
5 Maintenance ..................................................................................... 15
5.1 General ...................................................................................................................15
5.2 Fault finding .............................................................................................................15
6 Storage and disposal ........................................................................... 17
6.1 Storage ...................................................................................................................17
6.2 Disposal ...................................................................................................................17
7 Accessories ...................................................................................... 19
7.1 Introduction .............................................................................................................19
7.2 Accessories ...............................................................................................................19
7.2.1 Cables ....................................................................................................................19
7.3 ATC spares ...............................................................................................................19
For return of equipment, complete the HS Forms at the end of this manual.
dcs/7692/07/15
D351-08-880 Issue K
Page ii © Edwards Limited 2015. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
Contents
Illustrations
Figure Page
1 General view of gauge .................................................................................................. 9
2 Connection to external power supply ...............................................................................10
3 Connection of external relay .........................................................................................10
Tables
Table Page
1 Pressure/voltage characteristic for DV4D ...........................................................................11
2 Pressure/voltage characteristic for DV6M ..........................................................................12
© Edwards Limited 2015. All rights reserved. Page 1
Edwards and the Edwards logo are trademarks of Edwards Limited.
Introduction
D351-08-880 Issue K
1Introduction
1.1 Scope of this manual
This manual provides installation, operation and routine maintenance instructions for the Edwards Active
Thermocouple Gauge. Read this manual before installing and operating the gauge.
This manual contains essential safety information which supplements the safety features of the gauge. 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.
The following labels appear on the gauge:
1.2 General
The family of Active vacuum instruments is a new generation of stand-alone units which combine gauge-head and
controller in one active unit. The Active Thermocouple Gauge (ATC) consists of an electronics module which is
compatible with two types of Thermocouple gauge tubes, the DV4D and DV6M. The module connects to the tube via
a standard octal socket. The ATC requires a 13.5 to 36 V d.c. power supply, the pressure reading can be monitored
with a simple voltmeter or the analogue to digital converter of a data acquisition system. The type of Gauge tube to
be used is selected by a colour-coded two-position switch located in the top of the electronics module. The
electronics module also has a potentiometer used to adjust the operating pressure of a setpoint and a LED which
indicates the status of the setpoint. The gauge tubes terminate in a 1/8 inch NPT fitting. An adapter to allow
connection to NW16 flanges is available from Edwards (refer to spares list). Figure 1 illustrates the main features of
the ATC gauge.
WARNING
Warnings are given where failure to observe the instruction could result in injury or death to
people.
Warning - refer to accompanying documentation.
Edwards offer European customers a recycling service.
D351-08-880 Issue K
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This page has been intentionally left blank.
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Technical data
D351-08-880 Issue K
2Technicaldata
2.1 Operating conditions
2.2 Performance
2.2.1 Output signal
2.2.2 setpoint
The setpoint consists of an open drain transistor (FET) output which operates when the gauge pressure is below a
preset value. The setpoint has a fixed hysteresis of 1.2 V, that is, if the trip level is set to 4 V, then the trip is set
(ON) when the gauge output is below 4 V and reset (OFF) above 5.2 V. When the trip is 'ON' pin 6 is internally
connected to pin 2 (power supply common) and the red LED is illuminated.
Note: The external load must not exceed these ratings.
2.2.3 Gauge identification signal
The gauge identification signal is measured between pins 4 and 5, the readings are dependent upon the position of
the gauge select switch.
Operating temperature 5 °C to 50 °C
Relative humidity (non-condensing) 10 - 90%
Maximum operating altitude 2000 m
Voltage range 2 V to 10 V d.c.
Error status < 2 V or > 10 V d.c.
Minimum load 10 k
Maximum current source 1 mA
Settable range 2.2 to 8.5 V
Fixed hysteresis 1.2 V
setpoint output transistor ratings
Voltage rating 40 V
Current rating 100 mA
DV4D 56 k
DV6M 68 k
D351-08-880 Issue K
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Edwards and the Edwards logo are trademarks of Edwards Limited.
Technical data
2.3 Mechanical data
2.4 Electrical data
2.4.1 Electrical supply data
2.4.2 Electronic interface
2.5 Thermocouple gauge tubes
Data refers to DV4D and DV6M unless otherwise stated.
2.5.1 Materials exposed to vacuum
Nickel plated steel, alloy 52 (iron nickel) pins, stainless steel, gold, platinum, rhodium and palladium. The DV4D also
has a small amount of 60 Tin/40 lead solder.
Electronics module 56 mm (height) x 57 mm diameter.
Gauge tube 78 mm (length) x 32 mm diameter.
Assembled length of tube and electronics module 115 mm
Gauge tube volume DV4D 0.82 cm3
DV6M 8.2 cm3
Total weight:
Electronics module and gauge tube 120 grams
Vacuum connection 1/8 inch NPT
Input voltage range 13.5 V to 36 V d.c.
Maximum voltage ripple 1 V peak to peak
Maximum power consumption 540 mW
(when driven at 36 V d.c. at vacuum)
Socket connection FCC68, 8 way Western Electric
Pin allocation (See Figure 1 inset)
1 Power supply positive voltage
2Powersupplycommon
3 Gauge output signal
4 Gauge identification signal
5 Signal common
6setpointoutput
7Notconnected
8Notconnected
© Edwards Limited 2015. All rights reserved. Page 5
Edwards and the Edwards logo are trademarks of Edwards Limited.
Technical data
D351-08-880 Issue K
2.5.2 Colour coding
The gauge tubes are colour-coded on the label and plastic socket moulding as follows:
2.5.3 Pressure range
When used with ATC electronics module.
2.5.4 Thermocouple temperature
All values relative to ambient temperature.
2.5.5 Maximum internal overpressure
DV4D Purple
DV6M Yellow
DV4D 50 to 5 E-2 torr (65 to 6.5 E-2 mbar)
DV6M 1 to 1E-3 torr (13 - 1.3E-3 mbar)
At vacuum DV4D 250 °C
DV6M 300 °C
At atmosphere DV4D 30 °C
DV6M 6 °C
DV4D 10.3 bar absolute. (150 psia)
DV6M 3.4 bar absolute. (50 psia)
D351-08-880 Issue K
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