“WATERLOG™ PRODUCTS MANUFACTURED BY YELLOW SPRINGS INSTRUMENTS CO., INC. are
warranted by Yellow Springs Instruments Co., Inc. (“YSI”) to be free from defects in materials and
workmanship under normal use and service for twelve (12) months from date of shipment unless
otherwise specified in the corresponding YSI pricelist or product manual.
WaterLOG™ products not manufactured, but that are re-sold by YSI, are warranted only to the
limits extended by the original manufacturer. Batteries, desiccant, and other consumables have
no warranty. YSI’s obligation under this warranty is limited to repairing or replacing (YSI’s option)
defective products,which shall be the sole and exclusive remedy under this warranty.
The customer shall assume all costs of removing, reinstalling, and shipping defective products to YSI.
YSI will return such products by surface carrier prepaid within the continental United States of America.
To all other locations, YSI will return such products best way CIP (Port of Entry) INCOTERM® 2010,
prepaid. This warranty shall not apply to any products which have been subjected to modification,
misuse, neglect, improper service, accidents of nature, or shipping damage. This warranty is in lieu
of all other warranties, expressed or implied. The warranty for installation services performed by YSI
such as programming to customer specifications, electrical connections to products manufactured by
YSI, and product specific training, is part of YSI’s product warranty. YSI EXPRESSLY DISCLAIMS AND
EXCLUDES ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR
PURPOSE. YSI is not liable for any special, indirect, incidental, and/or consequential damages.”
A complete TERMS AND CONDITIONS OF SALE can be viewed at:
http://www.ysi.com/terms-and-conditions.php
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01 /
INTRODUCTION
2
Introduction
The WaterLOG® H-3553/ Pressure Sensor is well known for its compact size and combination of a Bubbler
and built-in pressure sensor. The H-3553 has also been referred to as a self-contained “smart” gas purge
system, because it produces a precision constant mass flow of gas.
Designed to measure fluid levels in surface water, ground water and tanks, the H-3553 Modbus or Auto
mode is enabled it will enter the RS-232 menu with any character sent to this port. uses a battery operated
compressor to maintain pressure in an internal tank. A microprocessor determines how much pressure is
needed in the tank, based on the current head pressure, to produce a constant bubble rate. The compressor
and tank replace the dry nitrogen tank used in previous systems to ensure a safer site.
A sophisticated system of sensors and valves to regulate the bubble rate and purge pressure replaces the
sight feed flow controller and pressure regulator (Conoflow system) used in previous systems. A purge feature,
temporarily pumps up the tank and opens a valve to apply high pressure to the orifice line. This feature is
designed to remove any sediment that may have collected in or around the outlet of the orifice line.
The H-3553 is a standalone system to be used with a Data Collection Platform (DCP). Additional programming
options and an H-3553 built-in menu, make the XL series DCP’s a favorite when it comes to selecting a data
logger to pair with this Bubbler.
Key Features:
• Easy to use stand-alone RS-232 menu setup
• Built in calibrated pressure sensor
• No external pressure sensor needed
• RS-485 MODBUS Client/Slave device (available in V1.3 or later)
• Auto update mode, measures itself based on user dened rate
• SDI-12 interface, 4 – 20mA output, and RS-232 data output
Display Features:
• Continuous display readout always shows last measured value
• ‘Read’ button causes the H-3553 to initiate a new measurement
• ‘Purge’ button causes the H-3553 to initiate a line purge
• ‘Tank Release’ button causes the H-3553 to release the pressure from the tank
• The adjust knob allows the user to manually set the stage and sensor SDI-12 address
Other Features:
• Provides a continuous gas ow
• Battery operated – Low power
• Microprocessor controlled, “smart” gas system
• One-piece manifold eliminates many potential sources of leaks
• Pressure gauge provides a visual indication of the tank pressure
• All components are easily accessible for inspection and maintenance
• Piston type compressor does not use diaphragm
• Provides an internal pressure relief valve
• Compressor is designed and rated for cold temperature operation
• Controlled and monitored as an SDI-12 sensor
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02 /
GETTING STARTED
4
Getting Started
Before installation, setup and operation of the H-3553 in the field, read through this section for a general
overview of what you have and how to use it.
What’s in the Box
When unpacking your H-3553, make sure all the components ordered are received and undamaged from
shipping. The basic package includes:
H-3553 Bubbler
7 Pin Interface Cable
Optional Items:
• Desiccating Air Dryer
• Orice Installation Kit
• Orice Line (1000 ft. minimum)
• RS-232 Communications Cable
• Replacement Air Dryer Desiccant
(2) Desiccant Canisters
1/4” Tubing to 1/8” NTP Connector
Mounting Hardware
5
GETTING STARTED
Product Description
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.
Enclosure Breather
RS-232 Menu Setup Port & Cable Connection
Power & Communications Main Interface Connection
Atmospheric PSI Vent for Sensors
Compressor Air Intake Desiccator Connection
Constant Bubble Out Orifice Line Connection 1/8 inch FNPT
Compressor Power (Connect First)
Initial Testing
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.
Power Up
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
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pressure.
Getting Started
Using the Display
The H-3553s display has a ‘Read’ button that
when pressed will cause the unit to initiate a new
measurement and update the display. Measurement
requests from an attached SDI-12 data logger will
also cause the display to update.
If the ‘Read’ button is pressed and held until
the display starts flashing, the Adjust screw may
be turned to increase or decrease the current
stage value. Turning the Adjust screw slowly
will change the hundredths (or thousandths
based on the digit setting) digit while turning
the screw fast changes the ones digit. This
allows one control to make both fine and course
adjustments.
If the ‘Read’ button is held down while the
H-3553 is being powered up, the display will
show the current SDI-12 address. The SDI-12
address may be changed using the Adjust screw. Turning the Adjust screw will change the address
in the range of 0 to 9. When the Read button is released the new SDI-12 address is saved and the
display switches to the normal stage readout. To change the SDI-12 address again, the power must
be disconnected and the special power-up sequence repeated.
When the ‘Purge’ button is pressed a new measurement will be initiated; following the
measurement, a line purge will begin. For more information see the Purge section in Chapter 4.
When the ‘Tank Release’ button is pressed the valve holding the air in the tank will be opened,
allowing the air stored in the tank to be released. This button can be useful when troubleshooting
the unit.
Make Measurement
Using a SDI-12 master device, like the XL series DCP, send the “0M!” measurement command to the H-3553.
Wait about 6 seconds, and then send the “0D0!” data command and verify the data retrieved with the example
below.
The WaterLOG® H-3553 is a system with a fully integrated digital pressure transducer specifically designed
for water level monitoring. The H-3553 directly measures dry gas over a broad temperature range.
WARNING! Before proceeding with the installation, please consider the following site preparation steps to
help prevent problems later.
Water Depth
Table 3-1 shows the maximum pressure to which the H-3553 is factory calibrated to measure. The sensor can
survive temporary operation up to twice the maximum rated pressure for the model’s range. However, any
measurements made beyond the rated pressure will be inaccurate.
*NOTE: Depth calculations
are derived from the standard
equation that one PSI is
generated by a column of water
Consideration should be taken in properly mounting the H-3553 system. First, attach the included mounting
feet to the H-3553 enclosure. Mount the H-3553 in a location where it will not get jarred or will shift during
operation.
When possible mount all equipment with connectors pointing down so that moisture or condensation that
could rest on the connectors does not penetrate the inner components of the equipment. Also, specifically
with the H-3553, having it mounted vertically helps prevent moisture from migrating to the valves. If moisture
does migrate, it will migrate first at the bottom of the tank and near the nylon plug.
Desiccator
Generally, an external desiccator is required to dry the compressor intake air. The desiccator prevents
accumulation of moisture in the tank, manifold and other areas in the system. Connect the output of the
desiccator to the port marked “Inlet”. Desiccators which employ “indicating” silica gel have the advantage of
visually showing the status of the desiccant. As the gel becomes saturated with moisture the gel changes from
blue to pink.
Orifice Line
The position and installation of the orifice line is vital to a successful and accurate H-3553 installation. These
are just a few of several things to consider when installing or checking an orifice line installation. Refer to
“Application Note 1005” for more detailed information about orifice line installation.
Be sure the water current or flow is not pushing against the end of the orifice line, as it will cause a
pressure to be placed on the line that is not related to the water depth. Also, be sure the water current or
flow is not pulling or drawing from the end of the orifice line, as this will cause a false lower pressure on
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