1. Electronic Ratio Valve ERV
Leopard Valve
Electronic Ratio Valve
ERV

2. Leopard valve

3. ERV - Dimensions:

4. ERV - Functionality The ERV is a post-mix valve that uses a
combination of sensors, stepper motors and a
PC board to control flow rate and ratio.
When the valve is actuated, a signal is sent to
the PC board to start flow. The syrup and water
modules open allowing soda (or water) and
syrup to enter the mixing body. The PC board
monitors water flow rate based on information
sent by a small flow turbine. Syrup flow is
monitored by two transducers (pressure sensors)
located on the syrup module.
The PC board calculates actual ratio and
compares that to the programmed ratio. The PCB
then adjusts the stepper motor positions as
needed to regulate the flow rate and ratio. When
the activation signal is released, the stepper
motors close on both the syrup and water sides,
completing the drink cycle.

5. ERV - Functionality The valve is programmed using a PDA or
TomCat device to set flow rate, and ratio.
In addition, the PDA ( only ) can be used to
obtain the following Diagnostic information
Valve Serial Number
Current Flavor
Finished Drink Ratio
Flow Rate
Total, syrup and water dispense volumes
Since the valve is opened and closed using
stepper motors, it has a backup power supply
system that will not activate the valve until it is
fully charged.
This can take several (3-4) minutes upon initial
dispenser power up.
If there is a power failure, the back up system
provides power for the valve to close.

6. ERV - Features IMPROVED QUALITY:
Electronically adjusts to provide correct water/syrup ratio on every dispense
Ratio not affected by syrup temperature or system pressure changes
Detects, indicates, & stops dispense when syrup or water are depleted to limit waste and poor served drink
Excellent casual drink temperature performance

7. ERV - Features OPERATIONAL IMPROVEMENTS
Ratio re-adjustments are not necessary
Re-adjustments of volume portions are not necessary
True volume controlled portions resulting in less crew intervention
System information stored within valve memory
Improved drink customer perception due to visual pouring without pulsating water and then syrup, continuous, quiet flow stream

8. ERV - Technical specifications:
Power requirements 24V, 50 or 60 Hz, 1A
Flow range oz/sec to 6.0 oz/sec ml/sec to 180 ml/sec
Flow Control Constant volume feedback loop for water and syrup.
Ratio Range 3.5:1 to 10:1
Ratio Control Ratio priority feedback loop for water and syrup.
Supply Sold-Out Indicator LED on front panel for water and syrup depletion automatic return to normal operation on replenishment of supply

9. ERV - Literature Brochure Installation Manual Service Manual
Operator Manual
Crew Training Manual
Trouble Shooting Guide
Illustrated Parts List
TomCat Manual
Presentations:
Commercial introduction
Technical training

10. ERV - Approvals TCCC Authorization since June 2007
McDonald’s Global release since April 2008
Agency listings

11. ERV - Issues Initial ERV Set-up device: Windows Pocket PC – HP iPAQ
Serial Communication Port
2008 – coming obsolete
US Investigates:
New Software based on Windows XP - Laptop
New Software based on Windows Mobile - Handheld
Enhance TomCat device with diagnostics
Coca-Cola “Red Brick” device (?)
Technician device:
IMI-Cornelius development “TomCat”
Cheap and very easy to use
No Diagnostics feature

12. ERV - Issues Open issue: Cleaning Syrup lines
Solution: New development of Cleaning Plug
Timeline:
Field-test device available June 2008
Production release July 2008

13. What is a STEPPER MOTOR ? Stepper Motor
Flow Turbine
Measures and controls water flow through the valve

14. Case contains rotor and bearings
Stepper Motor
Case contains rotor and bearings
Shaft moves up and down to regulate flow through the V-Groove
Linear Stepper Motor

15. Patented V-Groove V – Groove Technology Stepper Motor Shaft
Flow Rate
Position
Needle Valve
Patented V-Groove
V-Groove gives linear flow control
Cornelius Patent
V - Groove

16. IR beam is interrupted by the rotor
Flow Turbine
Water
Guide Vane
Optical Transmitter
IR beam is interrupted by the rotor
Optical Digital Device
6 pulses / ml
Water Flow
Optical Receiver
Rotor

17. Pressure Transducer Syrup
Differential pressure measured across an orifice plate
Syrup
Orifice Plate

18. Valve Setup Syrup Settings
Differential Signal from pressure transducer
Flow
None Sugar
Sugar
Syrup Type
Differential Signal from pressure transducer
Flow
Curve offset sets flavor
+ offset
- offset

19. RTD Flow Rate ONZ / sec ML / sec 1.50 44 1.75 52 2.00 59 2.25 67 2.5074
2.75 81
3.00 89