CONTENTS
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Manual USZ 08 · EN05 · 2015-06
INTRODUCTION ................................................................................... 1
Geometric arrangement of the paths of the USZ 08-6P ...................................... 3
Geometric arrangement of the paths of the USZ 08-3P ...................................... 4
Survey of equations used ................................................................................... 10
Equations for the ERZ 2000 USC / USE 09-C ............................................................. 10
Path velocity ............................................................................................................................................ 10
Corrected path velocity ............................................................................................................................ 10
Weighted flow velocity ............................................................................................................................. 10
Corrected weighted flow velocity ............................................................................................................. 10
Flow rate at measurement conditions ..................................................................................................... 10
Corrected flow rate at measurement conditions ..................................................................................... 10
Base correction of the gas meter ....................................................................... 11
Polynomial ............................................................................................................................................... 11
Error curve linearization of the gas meter ......................................................... 11
Polynomial ............................................................................................................................................... 11
INSTALLATION AND COMMISSIONING ............................................ 12
Installation of the meter ..................................................................................... 12
Unidirectional operation .............................................................................................. 12
Bidirectional operation ................................................................................................ 12
Pipe diameter .............................................................................................................. 13
Combination with the WBZ 08 vortex meter ................................................................ 13
Outdoor installation ..................................................................................................... 13
Seals ........................................................................................................................... 14
Screws ........................................................................................................................ 15
Electrical connections ........................................................................................ 16
Terminal assignments of the measuring element ........................................................ 16
ERZ 2000(-NG) terminals ............................................................................................. 17
Earthing and screening ................................................................................................ 19
Start-up................................................................................................................ 20
OPERATING THE ULTRASONIC COMPUTER ..................................... 21
General information about the ERZ 2000 USC .................................................. 21
Overview of functions .................................................................................................. 21
Gas meter / volume data logging ................................................................................ 22
Special information: "Parameters for the volume at measurement conditions in
conjunction with ultrasonic flowmeters" ..................................................................... 24
DZU: ERZ 2000 with USE 09-C ultrasonic flowmeter control unit ........................................................... 24
Error curve linearization of volume metering when using the USE 09-C .................................................. 25
IGM: ERZ 2000 with integrated ultrasonic controller ............................................................................... 25
Acknowledging alarm and warning messages and events ....................................................................... 35
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