5
ZDM
FM Rev. 11/10
3.1.4
Connecting Piping to the Sensor
The procedure for attaching piping to the sensor depends on the type of
thread that was ordered with the sensor. The most common thread in
North America is NPT (series ZDM-3XXX and ZDM-4XXX sensors.)
Occasionally, the European pipe thread (BSP) is ordered because of its
superior leak resistance. Series ZDM-1XXX and ZDM-2XXX sensors all
have BSP threaded fittings.
If the fittings on your ZDM are incorrect for your application, you can
correct the situation by purchasing a different mounting plate.
3.1.4.1
If you have NPT threads, coat the threads with a paste type pipe
sealant before threading into the mounting plate.
We recommend that PTFE tape NOT be used since pieces of it
may find their way into the sensor, possibly causing the gears to
bind. Should you have no alternative to PTFE tape, make sure that
it is properly trimmed and does not extend beyond the first thread
on your pipe fittings.
3.1.4.2
If you have BSP threads, place the sealing gaskets over the ends
of your pipe fittings and thread fittings into the mounting plate.
3.2
Electrical Connections
The standard ZDM operates on a power supply of: 10-28 VDC.
Diagram 3.2.1:
ZDM Wiring Schematic
