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Ref: P .ppt (18/04/23) 1EUROTHERM CONTROLS
26/2704 Vacuum Feature26/2704 Vacuum Feature
•What is vacuum•Vacuum in industry•Why use vacuum•Current solutions•Features of 2704 Block•Selling benefits
Cameron Large26/2704 Product Manager
Ref: P .ppt (18/04/23) 2EUROTHERM CONTROLS
What is VacuumWhat is Vacuum
Definition: A Space entirely void of matter
•Gauge pressure(atmosphere) : 1013mB(760Torr)•Absolute pressure : 0mB(0Torr)
: 1 mB = 0.75Torr
Absolute0mB
Gauge1013mB
Increasing PressureIncreasing vacuum
High Pressure
Low Vacuum
High Vacuum
Low Pressure
Ref: P .ppt (18/04/23) 3EUROTHERM CONTROLS
Vacuum in IndustryVacuum in Industry
Applications;•Vacuum heat treatment
•Annealing,melting,casting,sintering,brazing etc•Chemical Processes
•Distillation, freeze drying•Semiconductor
•Diffusion,MBE,CVD•Environmental test
•Altitude simulation•Composite curing autoclaves•High quality ceramics•Research & development•Lots more!!!
Ref: P .ppt (18/04/23) 4EUROTHERM CONTROLS
Why use VacuumWhy use Vacuum
•Creates pure atmosphere for heat treatment•No oxidisation of component surfaces•Vacuum brazing requires no flux•Ability to process special alloys
•Prevents atmosphere reacting with the process•Allows particles to move without collision•Removable of water vapour from organic substances by sublimation•Simulation of space conditions•Reduced distillation process time
Ref: P .ppt (18/04/23) 5EUROTHERM CONTROLS
Vacuum MeasurementVacuum Measurement
•Various vacuum sensor technologies•Pirani,Penning,Active Inverted Magnetron(AIM)•Modern gauges output 2-10vdc, calibrated for air•Output signal is usually logarithmic•Every gauge has a different curve•Some wide range gauges are being introduced
1.0-E08
Increasing vacuum(mB)
1.0+E03
1.0-E06
1.0-E04
1.0-E02
1.0+E00
Pirani measurement range
10vdc2vdc
AIM or Penning measurement range
2vdc 10vdc
Ref: P .ppt (18/04/23) 6EUROTHERM CONTROLS
Traditional Heat Treatment Traditional Heat Treatment FurnaceFurnace•Main control components
•Temperature programmer(High performance)•Possible slave temperature controllers•Vacuum controller(Not PID) with multiple setpoints•PLC: Size depends on application•Lots of cable
PLC
Temp Programmer
Vacuum Controller
Temp Input
Control Output
Vacuum Inputs
Process StartVacuum pumps & valves
Setpoint outputs
Digital status information
Ref: P .ppt (18/04/23) 7EUROTHERM CONTROLS
The Vacuum SequenceThe Vacuum Sequence
Traditional vacuum controller•Main suppliers Edwards, Leybold, Pfeiffer and Varian •Price range £700-£1300 dependent on No of inputs•3 inputs common in heat treatment•Function as alarm units providing relay outputs toswitch pumps and valves•Provides no PID or logic control functions
Isolation Valve
Diffusion Pump
Furnace
Roughing Pump
Vacuum
Low vac
High vac
Backing vac
PLC
Ref: P .ppt (18/04/23) 8EUROTHERM CONTROLS
Why Introduce a Vacuum FeatureWhy Introduce a Vacuum Feature
•Vacuum furnaces require high performancetemperature control•Eurotherm are already strong in this market
•Excellent knowledge of potential customers•Traditional competitors do not have this feature•Existing vacuum controllers cannot do temperature•Provides Ideal machine control applications•It gives us real user benefits to promote•We can command large selling margins
Ref: P .ppt (18/04/23) 9EUROTHERM CONTROLS
Main Issues to ResolveMain Issues to Resolve
•Non-Linear inputs•Use Poly-fit to generate curves
•All gauge manufactures have different curves•Curves will be stored in iTools
•Vacuum display must be in scientific notation•New resolution type has been introduced(SCI)
•Multiple On/Off setpoints required•Introduction of unique features•Combine Temp/Vacuum in one unit
•Reduce system cost
Ref: P .ppt (18/04/23) 10EUROTHERM CONTROLS
2704 Vacuum Block2704 Vacuum Block
Application Software Option•V1 = 1 gauge input•V3 = 3 gauge input•PID loop not required
Block Features•1 or 3 gauge input•Scientific display in mB,Torr,Pascal•Hi/Lo Vac gauge switchover •6 On/Off setpoint outputs•High vacuum gauge enable signal•Roughing pump timer•Leak detection routine
Ref: P .ppt (18/04/23) 11EUROTHERM CONTROLS
Vacuum Heat TreatmentVacuum Heat Treatment
Hi Vac Gauge
TemperatureControl Loop
Heating
Cooling
Setpoint Programmer
mB
VacuumFunction
Block
Temp SP Program
Events
Run
Hold
Reset
Control Sensor C
Lo Vac Gauge mB
Backing Gauge mB
SP1
SP6
Vacuum outputs CombinationalLogic
WaitAlarmsLoad Sensors
Ref: P .ppt (18/04/23) 12EUROTHERM CONTROLS
Our Selling BenefitsOur Selling Benefits
•Temperature & Vacuum in one unit•Massive advantage over companies like Honeywell, Yokogawa, Edwards, Leybold etc
•Control of diffusion pump temperature•Totalise running time and provide alarm
•Provide additional maths & PLC functions•Reduces the size, or removes the PLC
•Offer unique features•Automatic gauge switch-over•Roughing pump timer •leak detection
•Interface to any “Active Type” gauge•Not tied to one manufacturer
•Reduce total system cost•Increase our sales and margins