Operation and Maintenance
UFM Series 6
Q.Sonic-plus
8.3.2 Temperature Sensors Exchange
The meter is equipped with a temperature sensor for internal use (for more
information see Chapter 5.5 Flow Cell Temperature Sensor [p.21]). As the
temperature sensors are specially designed for the Ultrasonic Flow Meter
Series 6, they may only be exchanged with sensors from Elster.
As the temperature sensor only measures the flow cell temperature and is
not in contact with the gas in the pipe, exchanging can be done under
pressure.
8.3.3 Transducer Exchange
Each transducer is a separate component of the Ultrasonic Flow Meter
Series 6 that can be exchanged independently. This can be done without
degradation of the measuring properties and accuracy (thus the calibration)
of the Ultrasonic Gas Flow Meter.
However, as the transducers are paired up during production, Elster always
recommends changing both transducers of an acoustic path, if possible.
For the pressure sensor it is absolutely necessary to
depressurize the line before exchanging.
Obey the rules and regulations that apply to hazardous area
operations and those with respect to custody transfer regulations
(sealing).
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