LEFM 3xxCi User Manual
IB1406 Rev 12
Section 9
Page 63
February 2017
LEFM 3xxCi and 3xxCi-R Metrological Seals
The physical properties, acoustic properties, and calibration of the meter body are pre-programmed
into the transmitter; therefore, the programming of the transmitter must be controlled. Failure to
control transmitter’s programming can result in erroneous flow measurements outside the stated
accuracy.
As a precaution the LEFM 3xxCi design allows for seals to control programming the transmitter or altering
the meter body.
To ensure control of the electronics programming, a switch on the front of the transmitter can be engaged,
preventing configuration changes. The transmitter with cover removed is shown in Figure 9.1 below. If the
electronics switch SW1-4 is configured to the left (closed), the electronics cannot be reprogrammed
(irrespective of passwords). Using this switch combined with the seal wire on the transmitter enables full
metrological control of the system.
Figure 9.1 Transmitter, Front Cover Removed – SW1-4 Set to prevent changes
(shown without tamper evident seal for clarity)
CAUTION
