Xylem H-3553 - Manual (Page 8)

GETTING STARTED
It is important to familiarize yourself with the connections before installing a product at the site. Below are
standard connections found on the H-3553.
Product Description
Atmospheric PSI Vent for Sensors
RS-232 Menu Setup Port & Cable Connection
Compressor Air Intake Desiccator Connection
Constant Bubble Out Orifice Line Connection 1/8 inch FNPT
Enclosure Breather
Compressor Power (Connect First)
Power & Communications Main Interface Connection
Before installing the H-3553 in the field, it is a good practice to test the system in the shop or lab. This will help
preparations for a successful field install.
Initial Testing
Follow these steps to power up the H-3553:
1. Apply +12v to the “Compressor 12VDC” terminal connections
2. Referring to Table 2-1, connect +12 VDC, GND, and SDI-12 data connections of the 7 wire Main I/O
sensor interface pigtail cable to a SDI-12 master device, such as a WaterLOG® XL series DCP.
3. Verify the connections Table 2-1, and then connect the Main I/O sensor interface pigtail cable to the
H-3553 via the 7 pin “Sensor Interface” military grade connector.
4. At power up, the H-3553 will take an initial atmospheric measurement (listen for a “click” while the
sensors are switched to atmosphere) and then if needed the compressor will turn on to initialize the tank
pressure.
Power Up
6