Transcript 26/2704 Advanced Controllers

26/2704 Vacuum Feature
•What is vacuum
•Vacuum in industry
•Why use vacuum
•Current solutions
•Features of 2704 Block
•Selling benefits
Cameron Large
26/2704 Product Manager
EUROTHERM
CONTROLS
Ref: P
.ppt (17/07/2015) 1
a
What is Vacuum
Definition: A Space entirely void of matter
•Gauge pressure(atmosphere) : 1013mB(760Torr)
•Absolute pressure
: 0mB(0Torr)
: 1 mB = 0.75Torr
High Vacuum
Low Vacuum Low Pressure
Increasing vacuum
Absolute
0mB
EUROTHERM
CONTROLS
High Pressure
Increasing Pressure
Gauge
1013mB
Ref: P
.ppt (17/07/2015) 2
a
Vacuum 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!!!
EUROTHERM
CONTROLS
Ref: P
.ppt (17/07/2015) 3
a
Why 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
EUROTHERM
CONTROLS
Ref: P
.ppt (17/07/2015) 4
a
Vacuum 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
2vdc
10vdc
AIM or Penning measurement range
10vdc
2vdc
Pirani measurement range
1.0E08
EUROTHERM
CONTROLS
1.0E06
1.01.0E04
E02
Increasing vacuum(mB)
Ref: P
.ppt (17/07/2015) 5
1.0+E0
0
1.0+E0
3
a
Traditional Heat Treatment Furnace
•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
Temp Input
Temp Programmer
Digital status information
Control Output
Vacuum pumps &
valves
PLC
Process Start
Setpoint outputs
Vacuum Inputs
EUROTHERM
CONTROLS
Ref: P
.ppt (17/07/2015) 6
Vacuum Controller
a
The 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 to
switch pumps and valves
•Provides no PID or logic control functions
Low vac
Furnace
High vac
Isolation Valve
PLC
Backing vac
Diffusion
Pump
EUROTHERM
CONTROLS
Vacuum
Roughing
Pump
Ref: P
.ppt (17/07/2015) 7
a
Why Introduce a Vacuum Feature
•Vacuum furnaces require high performance
temperature 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
EUROTHERM
CONTROLS
Ref: P
.ppt (17/07/2015) 8
a
Main 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
EUROTHERM
CONTROLS
Ref: P
.ppt (17/07/2015) 9
a
2704 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
EUROTHERM
CONTROLS
Ref: P
10
.ppt (17/07/2015)
a
Vacuum Heat Treatment
Control Sensor
C
Temperature
Control Loop
Run
Program
Events
Setpoint Programmer
Wait
Alarms
Load Sensors
Hi Vac Gauge
EUROTHERM
CONTROLS
Cooling
Temp SP
Hold
Reset
Heating
mB
Lo Vac Gauge
mB
Backing Gauge
mB
Ref: P
11
.ppt (17/07/2015)
Vacuum
Function
Block
SP1
SP6
Combinational Vacuum outputs
Logic
a
Our 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
EUROTHERM
CONTROLS
Ref: P
12
.ppt (17/07/2015)
a