SYNCHRONIZATION
Synchronization may be required to prevent interference (readings with no flow or “cross talk”) in
applications where more than one DFM-IV Doppler sensor is used in close proximity. Synchronize
DFM-IV flow meters if:
- sensors from separate DFM-IV flow meters are mounted on the same pipe
- extended sensor cables from separate DFM-IV flow meters are run in the same conduit
To synchronize two or more DFM-IV flow meters:
1. Choose one DFM-IV as a MASTER. Go to the
SPECIAL FUNCTIONS menu, select Master and
Store? Yes.
2. All other DFM-IV’s must be SLAVES. Go to the
SPECIAL FUNCTIONS menu, select Slave and
Store? Yes.
3. Connect SYNC + of the “Master” unit to SYNC + of the first “Slave”. Connect SYNC + of the first
Slave to SYNC + of the second Slave and so on. Ensure that all units have a common Ground by
wiring all GND – terminals together as illustrated:
WARNING: Only one DFM-IV in the group can be in “MASTER” mode.
If all units are returned to “MASTER” status, the “SYNC” wiring must be disconnected.
DFM-IV Doppler Flow Meter
Manual Series A.6
Page 16
TMTR TMTR TMTR
SYNC SYNC SYNC
MASTER SLAVE SLAVE
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