1. 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

2. What is Vacuum Definition: A Space entirely void of matter
Gauge pressure(atmosphere) : 1013mB(760Torr)
Absolute pressure : 0mB(0Torr)
: 1 mB = 0.75Torr
Absolute
0mB
Gauge
1013mB
Increasing Pressure
Increasing vacuum
High Pressure
Low Vacuum
High Vacuum
Low Pressure

3. 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!!!

4. 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

5. 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
Pirani measurement range
10vdc
2vdc
1.0-E08
Increasing vacuum(mB)
1.0+E03
1.0-E06
1.0-E04
1.0-E02
1.0+E00

6. 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
PLC
Temp Programmer
Vacuum Controller
Temp Input
Control Output
Vacuum Inputs
Process Start
Vacuum pumps & valves
Setpoint outputs
Digital status information

7. 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
Isolation Valve
Diffusion Pump
Furnace
Roughing Pump
Vacuum
Low vac
High vac
Backing vac
PLC

8. 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

9. 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

10. 2704 Vacuum Block Application Software Option Block Features
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

11. Vacuum Heat Treatment C Vacuum Function Block Heating Control Sensor
Hi Vac Gauge
Temperature
Control Loop
Heating
Cooling
Setpoint Programmer mB
Vacuum
Function
Block
Temp SP
Program
Events
Run
Hold
Reset
Control Sensor C
Lo Vac Gauge
Backing Gauge
SP1
SP6
Vacuum outputs
Combinational
Logic
Wait
Alarms
Load Sensors

12. 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