Dynasonics DDFXD Doppler Ultrasonic Flow Meter - Manual (Page 23)

06-DPP-UM-00147 02/12 23
PART 3 - TRANSMITTER INSTALLATION
UNPACKING
After unpacking, it is recommended to save the shipping carton and packing materials in case the instru-
ment is stored or re-shipped. Inspect the equipment and carton for damage. If there is evidence of ship-
ping damage, notify the carrier immediately.
MOUNTING LOCATION
The enclosure should be mounted in an area that is convenient for servicing, calibration and for observa-
tion of the LCD readout.
1) Locate the transmitter within the length of transducer cable that was supplied with the DFX sys-
tem. If this is not possible, it is recommended that the cable be exchanged for one that is of prop-
er length. While transducer cable extension is not generally recommended, if additional trans-
ducer cable length is required, utilize cable and connectors of the correct type and impedance. In
many cases, especially if a splice my be exposed to water or other liquids, it may be more effective
to replace the entire cable. Transducers use RG59 ,75 ohm coaxial cable or Twinax (Belden #9463)
or (Belden # 9463DB) 78 Ohm two conductor cable.
2) Mount the DFX transmitter in a location that is:
t
Where little vibration exists
t
Protected from falling corrosive fluids
t
Within ambient temperature limits -40 to +185 °F (-40 to +85 °C)
t
Out of direct sunlight. Direct sunlight may increase transmitter temperature to above the maxi-
mum limit
3) Mounting: Refer to Figure 3.1 for enclosure and mounting dimension details. Ensure that enough
room is available to allow for door swing, maintenance and conduit entrances. Secure the enclo-
sure to a flat surface with four appropriate fasteners.
4) Conduit holes: Conduit hubs should be used where cables enter the enclosure. Holes not used for
cable entry should be sealed with plugs.
NOTE: Use NEMA 4 (IP-65) rated fittings/plugs to maintain the watertight integrity of the enclosure. Generally, the left conduit
hole (viewed from front) is used for line power, the center conduit hole for transducer connections and the right hole is utilized for
ISO-MOD I/O wiring.
5) If additional holes are required, drill the appropriate size hole in the enclosure’s bottom. Use ex-
treme care not to run the drill bit into the wiring or circuit cards.