Xylem H-3551 User Manual

D E S I G N A N A L Y S I S A S S O C I A T E S , I N C .

75 West 100 South, Logan, Utah 84321 Phone: [phone] Fax: [phone] Web: http://www.waterlog.com E-mail: [e-mail]

Gas Purge Bubbler

Model

H-3551

Owner's Manual

Version 3.0

D E S I G N A N A L Y S I S A S S O C I A T E S , I N C .

75 West 100 South, Logan, Utah 84321 Phone: [phone] Fax: [phone] Web: http://www.waterlog.com E-mail: [e-mail]

User Agreement/

W

ATERLOG

®

Warranty

H-3551 User Agreement/WATERLOG

®

Warranty W-1

1. NATURE OF THE PRODUCT

This agreement accompanies an interface module comprising firmware, circuitry and other electronic
equipment in an enclosed housing, and packaged together with written instructional materials. The
packaged electronic circuitry and instructional materials herein are collectively referred to as the
“PRODUCT.” The PRODUCT is made available from DESIGN ANALYSIS ASSOCIATES, INC., of
75 West 100 South, Logan, Utah 84321 (hereinafter referred to as “DESIGN ANALYSIS”), and contains
information and embodies technology that is confidential and proprietary to DESIGN ANALYSIS, and the
availability and use of the PRODUCT is extended to you, the USER, solely on the basis of the terms of
agreement which follow.

2. ACKNOWLEDGMENTS BY USER

Opening the package which encloses the accompanying PRODUCT indicates your acceptance of the terms
and conditions of this agreement and constitutes an acknowledgment by you of the confidential and
proprietary nature of the rights of DESIGN ANALYSIS in the PRODUCT.

3. DUTIES OF YOU, THE USER

In consideration for the access to and use of the PRODUCT extended to you by DESIGN ANALYSIS and
to protect the confidential and proprietary information of DESIGN ANALYSIS, USER agrees as follows:

(a) USER agrees that they will not remove from the exterior of the housing of the PRODUCT any safety

warnings or notices of proprietary interest placed thereon by DESIGN ANALYSIS.

(b) USER agrees that they shall not disassemble or otherwise reverse engineer the PRODUCT.

(c) USER agrees to treat the PRODUCT with the same degree of care as USER exercises in relation to

their own confidential and proprietary information.

4. TERM

USER may enjoy these rights only as long as their possession of the PRODUCT shall continue to be
rightful. These rights will cease if the PRODUCT is returned to DESIGN ANALYSIS under the terms of
any redemption offer, warranty, or money-back guarantee, or if USER transfers the PRODUCT to another
party on terms inconsistent with this agreement.

5. LIMITED WARRANTY
(b) What is Covered

DESIGN ANALYSIS warrants that for a period of twelve months from the time of purchase the
functions to be performed by the PRODUCT will be substantially in compliance with USER
documentation. DESIGN ANALYSIS also warrants that the PRODUCT will be free from defects
in materials and workmanship for a period of ONE YEAR from the date of purchase.

(b) What USER Must Do

If the product fails to satisfy the above warranty, USER must notify DESIGN ANALYSIS in
writing within the applicable period specified above and reasonably cooperate with the directions
they received from DESIGN ANALYSIS.

W-2 User Agreement/WATERLOG

®

Warranty H-3551

(c) What DESIGN ANALYSIS Will Do

DESIGN ANALYSIS will repair the PRODUCT or will endeavor to provide a replacement of
same within a reasonable period of time. In the event that DESIGN ANALYSIS is unable to make
the necessary repairs or replacement within a reasonable period of time, the original purchase price
will be refunded upon the return of the PRODUCT to DESIGN ANALYSIS.

(d) Limitations

(i) THE ENTIRE REMEDY FOR BREACH OF THIS LIMITED WARRANTY SHALL

BE LIMITED TO REPLACEMENT OF THE DEFECTIVE PRODUCT OR
REFUNDING OF THE PURCHASE PRICE, AS SET FORTH ABOVE. IN NO
EVENT WILL THE LIABILITY OF DESIGN ANALYSIS TO USER OR TO ANY
OTHER PARTY EXCEED THE ORIGINAL PURCHASE PRICE OF THE PRODUCT,
REGARDLESS OF THE FORM OF THE CLAIM.

(ii) EXCEPT FOR THE EXPRESS WARRANTIES ABOVE, DESIGN ANALYSIS

SPECIFICALLY DISCLAIMS ALL OTHER WARRANTIES, INCLUDING,
WITHOUT LIMITATION, ALL IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS FOR A PARTICULAR PURPOSE.

(iii) UNDER NO CIRCUMSTANCES WILL DESIGN ANALYSIS BE LIABLE FOR

SPECIAL, INCIDENTAL, CONSEQUENTIAL, INDIRECT, OR ANY OTHER
DAMAGES OR CLAIMS ARISING FROM THE USE OF THIS PRODUCT, THIS
INCLUDES LOSS OF PROFITS OR ANY OTHER COMMERCIAL DAMAGES,
EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. IN NO EVENT
WILL DESIGN ANALYSIS BE LIABLE FOR ANY CLAIMS, LIABILITY, OR
DAMAGES ARISING FROM MODIFICATION MADE THEREIN, OTHER THAN
BY DESIGN ANALYSIS.

(iv) THIS LIMITED WARRANTY GIVES USER SPECIFIC LEGAL RIGHTS. USER

MAY ALSO HAVE OTHER RIGHTS WHICH VARY FROM STATE TO STATE.
SOME STATES DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED
WARRANTY LASTS OR THE EXCLUSION OF INCIDENTAL OR
CONSEQUENTIAL DAMAGES, SO THOSE LIMITATIONS OR EXCLUSIONS
MAY NOT APPLY.

6. GOVERNING LAW

This Agreement and its validity and interpretation shall be governed by the laws of the State of Utah,
notwithstanding any choice of law rules of Utah or any other state or jurisdiction.

Chapter 1

Introduction

H-3551 Introduction 1-1

1.0 Introduction

The WATERLOG

®

Model H-3551 is a self-contained "smart" gas purge system which produces a
precision, constant mass flow of gas. Together with a pressure measurement device, it is used to measure
fluid levels in applications such as surface water (streams and lakes, etc.), ground water and tanks.

The H-3551 uses a battery operated compressor to maintain pressure in an internal tank. An internal
microprocessor controller determines how much pressure is needed in the tank, based on the current head
pressure, to produce a constant bubble rate. Hence, the term "smart". The compressor and tank replace the
dry nitrogen tank used in previous systems.

The H-3551 uses a sophisticated system of sensors and valves to regulate the bubble rate and purge
pressure. This portion of the H-3551 replaces the sight feed flow controller and pressure regulator
(Conoflow system) used in previous systems.

The H-3551 is used primarily with the WATERLOG

®

Series Model H-350XL which performs several
different functions in the system: First, it is the precision pressure measurement source for measuring the
fluid level. This function replaces the manometer in previous systems. Second, it is the terminal through
which the H-3551 is configured. Third, it can be the data recorder for the system, thus removing the need
for an external data recorder.

The H-3551's provides a purge feature which temporarily pumps up the tank to a high pressure 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.

1.1 Key Features

Following is a list of some of the H-3551's features:

! Provides a continuous gas flow
! Battery operated
! Microprocessor controlled
! One-piece manifold eliminates many potential sources of leaks
! Pressure gauge provides a visual indication of the tank pressure
! Hydrophobic intake membrane, protects compressor
! All components are easily accessible for inspection and maintenance
! Compressor does not have a “diaphragm”
! Provides an internal pressure relief valve
! Compressor is serviced and rated for cold temperature operation
! Can be optionally controlled and monitored as an SDI-12 “sensor”

1-2 Introduction H-3551

1.2 How it Works

The H-3551 has a motor driven compressor which maintains pressure in a small tank. Gas flows from the
tank through a precision restriction to the output port. The pressure across the restriction is measured with
a pressure transducer. By turning the compressor on and off, the micro controller attempts to maintain a
constant pressure across the restriction. Thus maintaining a constant gas flow. The micro controller also
compensates for the effects of gas density change with temperature to maintain a constant flow through the
restriction.

1.3 Unpacking the H-3551
You should have received the following items:

1. WATERLOG

®

Series H-3551 "Smart Gas" system

2. RS-485 Communications/power Cable

3. Installation Kit

4. This Owner’s Manual

Please verify you have received these components and any other optional equipment you may have ordered.
It is recommended that you visually inspect inside the H-3551 enclosure to verify all electrical connections
are secure, where some movement may have occurred during shipment.

1.4 Testing the System

Before installing the H-3551, you may wish to test the system in the shop or lab. This will familiarize you
with the instrument in an environment where it is easy to work and you are near a telephone if questions
should arise.

If you are unable to get the H-3551 up and running, refer to Chapter 2 (Installation) and Chapter 4
(Trouble Shooting). If you have further questions, feel free to call one of our support personnel at (435)
753-2212 for assistance.

Chapter 2

Installation

H-3551 Installation 2-1

2.1 Installing the WATERLOG® Series Model H-3551

For proper installation of the H-3551, you will need:

! The H-3551
! This Owner's Manual
! RS-485 serial cable (provided)
! Installation kit (provided)

Installation instructions for the H-3551 may vary somewhat according to your specific application and field
conditions.

The photo below shows the input/output panel of the H-3551 where you make connections for power,
ground, communications, outlet to orifice, and pressure to your sensor. Observe the labels to determine
where you should make your connections.

2-2 Installation H-3551

2.2 Orifice and Sensor Connections

In its simplest form, a gas purge pressure measurement system consists of a gas source, a pressure
measurement device and an orifice tube all connected together in a “ T” arrangement. Because the H-3551
has the capability of purging the orifice line, a more complex connection is required. Do not use a simple

“T” connection to connect the bubbler and pressure sensor to the orifice line, instead, use the two
dedicated ports of the H-3551. The H-3551 includes an internal valve which isolates the pressure sensor

output from the orifice line during a purge sequence. This helps prevent a plugged orifice condition from
damaging the pressure sensor.

If you are using a pressure sensor other than the H-350XL you may need to take extra precautions to
further protect your pressure sensor. See Chapter3.

2.3 Recommended Field Installation Procedures

1. The H-355 must be wall mounted in the vertical position, with the manifold down. Mounting feet are

provided. A vertical mount helps ensure moisture will not accumulate in the internal pressure tank.

2. Connect the pressure line between the H-3551 and your pressure measurement device. This can be

done using the H-3551-Install kit. This kit is designed for use with the H-350XL. If your measurement
device has different connections, you will need to provide the appropriate fittings. You will need a 1/8"
NPT male tubing fitting for the sensor output. It is recommended that you use the 1/8" copper tubing
supplied in the install kit. The proper ferrules must be used to insure there are no leaks.

3. The H-3551 requires two separate power sources. First is the compressor 12V which powers the

compressor and control valves. This supply is typically made with heavy gauge wire to the gauge
station 12V battery. Second is the 12V which powers the control module. This source is supplied from
the pressure measurement sensor through the interface cable (provided), and into the control connector.
It is best to connect the compressor power first, then the control power second. If a pumping sequence
fails, the controller suspends pumping for a while to allow the battery to recharge. By connecting the
pump power first, the controller will not prematurely detect a dead battery and suspend pumping.

4. Generally, an external desiccator is required to dry the intake air. The desiccator prevents

accumulation of moisture in the tank, restriction and orifice line. Connect the output of the desiccator
to the port marked “intake”. 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 turns
blue. See Appendix-B for further information and the specification for a recommended desiccator.

H-3551 Installation 2-3

H-355

H-350

Data Collection Platform/

Data Logger

Gas Purge Line Orifice

60 Bubbles
Per Minute

RS-485

Pressure Line to H-350

SDI-12 or RS-232

Figure 2-2. H-355/350 Pressure Measurement System

2.4 Control Connector

Pin No. Description Wire Color

1 RS485DAT+ Black

2 RS-485DAT- Brown

3 GND Red

4 GND Orange

5 +12V Yellow

6 +12V Green

7 +12V

8 SD-12 Data

9 Gnd

2.5 Connecting a WATERLOG® Series Model H-350XL Pressure Sensor

Figure 2-2 shows a typical installation of a complete pressure measurement system.

Control Connector &

Pump Power Terminals

2-4 Installation H-3551

Please note the following:

1. The install kit provided connects the “Sensor” output port of the bubbler directly to the

“Pressure Input” of the H-350XL without any additional parts.

2. The RS-485 serial cable provided is equipped with plugs on both ends for direct connection

between the “control” input of the H-3551 and the “Auxiliary output” of the H-350XL.

H-350XL pressure sensor and H-3551 bubbler

mounted on a plywood panel

Chapter 3

Operation

H-3551 Operation 3-1

3.1 Pumping Operation

During normal operation, if the tank pressure becomes too low the micro controller makes several
tests before turning the compressor on:

1. If the compressor power input (terminal strip) is below 10.0 volts, the compressor will not turn

on. This is to prevent further discharge of an already stressed battery.

2. The compressor will not turned on if a purge sequence within the previous elapsed 1-hour

failed. This allows the battery charger to charge the battery without the compressor draining
the battery as fast as it is charged.

Once the compressor is turned on, the battery voltage is no longer monitored by the micro
controller.

3.1.1 Maintenance Pressure Pump Failure
If the compressor runs longer than 60 seconds while pumping the tank to the pressure needed for
the desired bubble rate, the micro controller turns off the compressor and disables further pumping
for 30-seconds.

3.1.2 Purge Pump Failure
When a purge sequence is initiated, the compressor is activated to pump the tank to the specified
purge pressure. If the compressor runs longer than 300 seconds while pumping the tank to the
proper pressure, the micro controller turns off the compressor and disables all further pumping for
1-hour.

While servicing the system, these battery protection features can be inadvertently activated if the
12V pump power (via the terminal strip) is disconnected or fails while the compressor is running.
You can recover from these lockout conditions by momentarily disconnecting the RS-485 control
connector to reset the micro controller.

3-2 Operation H-3551

3.2 Operation with the H-350XL Pressure Sensor Attached

The following is a description of the H-350XL submenus used for configuring the bubbler.

<Gas Purge Setup > Auto Purge Enbl[OFF]

Bubble Rate[XXX]/min

Purge Thresh[XXX]PSI

Purge Presur[XXX]PSI

Purge Time: [XXX]sec

Manual Purge: ENT=Y

Timed Prg: [XX] days

Tank PSI = XX.X

Diff PSI = XX.XX

Last Prg=MM/DD HH:MM

The H-350XL can sense when the orifice line is restricted or plugged. The system can be
configured to do an automatic purge of the orifice line when it becomes necessary. This menu item
turns the auto purge on or off.

<Gas Purge Setup > Auto Purge Enbl[OFF]

This setting specifies the bubble rate that should flow from the end of the orifice tube. The
programmable range is 30 to 120 bubbles per minute.

<Gas Purge Setup > Bubble Rate[XXX]/min

This setting sets the purge threshold. If the orifice line pressure reaches the purge threshold, the
H-350XL can initiate an auto purge. The range of “Purge Thresh” is 10 to 65 psi.

<Gas Purge Setup > Purge Thresh[XXX]PSI

This setting is the pressure that the H-3551 uses to purge the orifice line. The range is 15 to 80 psi.
Set this value to a pressure which would reasonably purge sediment and debris from the orifice.
Keep in mind that the higher pressures require more energy from the battery.

<Gas Purge Setup > Purge Presur[XXX]PSI

H-3551 Operation 3-3

This setting is the duration of a purge in seconds. The range is 30 to 240 seconds. Allow enough
time for the purge to dissipate and the bubble rate to fall near zero.

<Gas Purge Setup > Purge Time: [XXX]sec

Pressing <Enter> on this item will initiate a purge sequence using the current purge settings.

<Gas Purge Setup > Manual Purge: ENT=Y

This option is used to force a purge every XX days. The limits are 00 to 99 days. If the option is set
to 00 then this option is in affect disabled. A value of 01 will cause a purge every day. The purge
will happen after the first scan past noon.

<Gas Purge Setup > Timed Prg: [XX] days

This value is the current pressure of the H-3551's internal air tank in psi. This value is informative
only and cannot be edited. The tank pressure should be approximately 3-5 PSI greater than the
orifice pressure.

<Gas Purge Setup > Tank PSI = XX.X

This value is the difference between the tank pressure and the pressure on the orifice line in psi.
Like tank psi, this value cannot be edited. This value is directly proportional to the bubble rate and
should be approximately 3-5 PSI.

<Gas Purge Setup > Diff PSI = XX.XX

This display shows the month, day any hour when the last purge sequence was made.

<Gas Purge Setup > Last Prg=MM/DD HH:MM