Elster Instromet 6 Series - SPU

3
Application and Operation
UFM Series 6
Safety Instructions
Page 11 of 38
3.2 SPU
The Signal Processing Unit (SPU) houses the flow meter electronics and
comprises the following user interfaces:
 SPU label (see the following paragraphs)
 Electrical user connections ( see Chapter 4 Installation and
Chapter 5 Electrical Parameters)
 Local display (see the Operation and Maintenance manual of your
particular flow meter, latest valid version)
3.2.1 SPU - Special Conditions for Safe Use
Contact the manufacturer for information on the dimensions of the
flameproof joints.
The enclosure is provided with special fasteners of property class A2-70.
These special fasteners are only available from Elster.
For FM approved products refer to  Annex A – Control Drawing (FM) for
particular requirements.
3.2.2 SPU – Label
The ultrasonic flow meter is available with approval for use in hazardous
areas according to ATEX, IECEx, FM Approval, or CSA. Always refer to the
actual label information on your flow meter as well as this manual for correct
use.
Each SPU label comprises:
 Our company name and address
 Type of ultrasonic flow meter
 Model SPU
 Serial number
 Power: 18-30 VDC / 20Wmax
 Year-Month
 Warning: Read instruction manual before operating device