Xylem H-3553 - Manual (Page 12)

the line not related to the water depth. The line should be installed in an area where the flow of water will
remain relatively calm as compared to the real stage changes. Here are a few Do’s and Do not’s on mounting
the line.
Do:
• Mount the outlet in still water.
• Mount the outlet so the last inch or so is almost horizontal, (slightly downward side exit).
• Try to prevent swells in long runs of orifice line (upward then downward sections).
• Use a muffler in more turbulent waters.
Do not:
• Do not mount the outlet facing up stream, downstream, or upwards.
• Do not allow any portion of the line to be lower than the exit point.
• Do not allow “goose necks” in the orifice line.
• Do not use thin walled tubing, only use USGS approved orifice line.
• Do not mount outlet in the wake of an obstruction, bridge pier, rock, etc.
GETTING STARTED
10
H-3553 Xl series DCP
Red (+12V) +12V
Black (Gnd) Gnd (SDI-12)
Yellow (SDI-12) Data (SDI-12)
Table 3-2: H-3553 to XL Series DCP WIring
Power Wiring
The H-3553 has two power connections. The first is the 2 position terminal strip labeled “Compressor 12VDC”.
This connection provides power to the compressor and the control valves.It is recommended using heavier
gauge wire (about 18AWG) for this connection and connecting it directly to the gauge station + 12V battery.
The second power connection +12V through the circular connector labeled “Sensor Interface”. This connection
is the power connection for the circuit board or control module board. It is recommended to power the
control module board via the DCP +12V input instead of using the +12V switched output. Table 3-2 shows the
wiring for connecting the H-3553 to an XL Series DCP.
note: It is recommended to connect the “Compressor
+12VDC” power source first, then the “Sensor Interface”
control module board power second. This is because the
H-3553 makes an initial measurement at power up and
without the compressor and control valves powered the
H-3553 cannot take an atmospheric measurement to adjust
for barometric pressure.