Contents 
Chapter 1   Start Here… ......................................................................................................................................... 1 
About this Manual ........................................................................................................................................... 1 
About the Ultra Twin ...................................................................................................................................... 2 
Functional Description .................................................................................................................................... 2 
Product Specification....................................................................................................................................... 4 
EC Declaration of Conformity ........................................................................................................................ 6 
Wall Mount .............................................................................................................................................. 6 
Fascia Mount ........................................................................................................................................... 7 
Chapter 2   Installation............................................................................................................................................ 9 
Power Supply Requirements ........................................................................................................................... 9 
Safety Symbols ................................................................................................................................................ 9 
Location ......................................................................................................................................................... 10 
Dimensions .................................................................................................................................................... 11 
Wall mount ............................................................................................................................................ 11 
Fascia Mount ......................................................................................................................................... 14 
Terminal Connection Details ........................................................................................................................ 15 
Wall Mount ............................................................................................................................................ 15 
Fascia Mount ......................................................................................................................................... 16 
Fuse Location ................................................................................................................................................ 22 
Wall mount ............................................................................................................................................ 22 
Fascia mount .......................................................................................................................................... 22 
Preparation for Operation .............................................................................................................................. 23 
Maintenance ................................................................................................................................................... 24 
Chapter 3   How To Use Your Ultra Twin ......................................................................................................... 25 
Operating the Controls .................................................................................................................................. 25 
Display ................................................................................................................................................... 25 
Run Mode .............................................................................................................................................. 27 
Program Mode ....................................................................................................................................... 27 
How to Access Program Mode ..................................................................................................................... 28 
Test Mode ...................................................................................................................................................... 33 
Using the RS232 Serial Interface .................................................................................................................. 34 
Parameter Defaults ........................................................................................................................................ 36 
Factory Defaults ..................................................................................................................................... 36 
Chapter 4 Quick Set-up Guide ............................................................................................................................. 37 
Level or Volume ............................................................................................................................................ 38 
Example 1 Level Monitoring with Alarms .......................................................................................... 44 
Example 2 Level Monitoring and Control (up or down) ..................................................................... 46 
Example 3 Volume Application ........................................................................................................... 48 
Example 4 : Differential Control........................................................................................................... 50 
Pump .............................................................................................................................................................. 54 
Example 1  Sump Control (pump down) ............................................................................................. 59 
Example 2 Reservoir Control (pump up) ............................................................................................. 61 
Flow ............................................................................................................................................................... 63 
Exponential Devices ...................................................................................................................................... 70 
Point of Measurement ........................................................................................................................... 71 
Calculations ............................................................................................................................................ 73 
Example 1 ‘V’ Notch  Weir ................................................................................................................. 74 
BS3680 Flumes ............................................................................................................................................. 76 
Point of Measurement ........................................................................................................................... 76 
Calculations ............................................................................................................................................ 77