P:WATERLOGH355(Bubbler)Manualv1.2Entire H-355 Manual · 2014. 10. 4. · Chapter 1 Introduction To The WATERLOG® Series H-355 H-355 Introduction to the WATERLOG® Series H-355 1-1

ModelH-355

Owner’s Manual

ModelH-355

Owner's ManualNOTICE

This product embodies technology that is confidential and proprietary technology of DESIGNANALYSIS ASSOCIATES, INC., and which is protected by United States copyright laws andinternational copyright treaty provisions, and/or by contract and applicable laws of trade secrecy. These include all Software, Printed Circuit Board Artwork, Schematic Diagrams, andTechnologies applied therein. The enclosure encasing the electronics of this instrument may notbe opened without written consent of DESIGN ANALYSIS ASSOCIATES, INC., and anyattempt to do so without such written authorization constitutes a breach of contract and will alsovoid any applicable warranty for the product.

Document Number: H355000Document Authors: Mike Argyle, David OlsenRevision: 1.2

Table of Contents

User Agreement/WATERLOG® Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . W-1

Chapter 1 Introduction to the WATERLOG® Series Model H-355

1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11.2 Key Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11.3 How it Works . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21.4 Unpacking the H-355 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21.5 Testing the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Chapter 2 Installation

2.1 Installing the WATERLOG® Series Model H-355 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12.1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22.1.2 Recommended Field Installation Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

2.2 Connecting a WATERLOG® Series Model H-350 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-32.3 SDI-12 Command and Response Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-42.4 Measure Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-52.5 Send Data Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-72.6 Initiate Verify Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-82.7 Send Acknowledge Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-92.8 Send Identification Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-92.9 Change Sensor Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-102.10 Extended Read Parameter Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-112.11 Extended Write Parameter Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

Chapter 3 Operation

3.1 Normal Pumping Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13.1.1 Pumping With the H-350 Attached . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13.1.2 Purge Pumping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

3.2 With the H-350 Pressure Transducer Attached . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13.3 Stand-Alone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-43.4 Manual Purge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Chapter 4 Maintenance/Trouble Shooting

4.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14.2 Trouble Shooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

4.2.1 H-350 reports “H-355 NOT RESPONDING” . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14.2.2 Intermittent Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Appendix A - Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1Appendix B - Dry Air System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1

User Agreement/WATERLOG® Warranty

H-355 User Agreement/WATERLOG® Warranty W-1

1. NATURE OF THE PRODUCT

This agreement accompanies a pressure measuring system comprising micro-coded circuitry andother electronic equipment sealed in an enclosed housing, and packaged together with writteninstructional materials. The packaged electronic circuitry and instructional materials herein arecollectively referred to as the “PRODUCT.” The PRODUCT is made available from DESIGNANALYSIS ASSOCIATES, INC., of 75 West 100 South, Logan, Utah 84321 (hereinafterreferred to as “DESIGN ANALYSIS”), and contains information and embodies technology thatis confidential and proprietary to DESIGN ANALYSIS, and the availability and use of thePRODUCT is extended to you, the USER, solely on the basis of the terms of agreement whichfollow.

2. ACKNOWLEDGMENTS BY USER

Opening the package which encloses the accompanying PRODUCT indicates your acceptance ofthe terms and conditions of this agreement and constitutes an acknowledgment by you of theconfidential 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 DESIGNANALYSIS and to protect the confidential and proprietary information of DESIGN ANALYSIS,USER agrees as follows:

(a) USER agrees that they will not open the sealed housing of the PRODUCT, and thatthey will take all necessary precautions to prevent their employees, agents, sub-contractors and resellers from doing so.

(b) USER agrees that they will not remove from the exterior of the housing of thePRODUCT any warnings against opening or notices of proprietary interest placedthereon by DESIGN ANALYSIS, and that they will take all necessary precautions toprevent their employees, agents, sub-contractors, and resellers form removing suchmarkings therefrom.

(c) USER agrees to treat the PRODUCT with the same degree of care as USERexercises in relation to their own confidential and proprietary information.

(d) USER agrees to return the PRODUCT to DESIGN ANALYSIS if and when thePRODUCT is deemed to be no longer of use. In return therefore, USER will receivefrom DESIGN ANALYSIS a redemption fee of $10.00.

W-2 User Agreement/WATERLOG® Warranty H-355

4. LICENSE

The PRODUCT is made available under license from DESIGN ANALYSIS. In consideration ofpayment, USER is hereby granted a limited right under applicable trade secret and copyrightrights to use the PRODUCT. THE PAYMENT DOES NOT CONSTITUTE A PURCHASE OFTHE PRODUCT, AND THE RIGHT TO USE THE PRODUCT IS NONTRANSFERABLE,EXCEPT TO A PARTY AGREEING TO BEING BOUND BY TERMS CONSISTENT WITHTHIS AGREEMENT. THIS MEANS THAT THE USER IS NOT AUTHORIZED TO SELLOR LEASE THE RIGHT TO USE THE PRODUCT OR ANY PORTION THEREOF TO ANYINDIVIDUAL OR COMPANY GAIN, OR OTHERWISE WITHOUT OBTAINING THEAGREEMENT OF SUCH INDIVIDUAL OR COMPANY TO ABIDE BY THE TERMS OFTHIS AGREEMENT. ALL RIGHTS NOT SPECIFICALLY GRANTED ABOVE ARERESERVED BY DESIGN ANALYSIS.

5. TERM

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

6. LIMITED WARRANTY

(a) What is Covered

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

(b) What USER Must Do

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

(c) What DESIGN ANALYSIS Will Do

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

H-355 User Agreement/WATERLOG® Warranty W-3

(d) Limitations

(i) THIS LIMITED WARRANTY IS VOIDED WHERE THE SEALEDHOUSING OF THE PRODUCT HAS BEEN OPENED.

(ii) THE ENTIRE REMEDY FOR BREACH OF THIS LIMITED WARRANTYSHALL BE LIMITED TO REPLACEMENT OF THE DEFECTIVEPRODUCT OR REFUNDING OF THE PURCHASE PRICE, AS SETFORTH ABOVE. IN NO EVENT WILL THE LIABILITY OF DESIGNANALYSIS TO USER OR TO ANY OTHER PARTY EXCEED THEORIGINAL PURCHASE PRICE OF THE PRODUCT, REGARDLESS OFTHE FORM OF THE CLAIM.

(iii) EXCEPT FOR THE EXPRESS WARRANTIES ABOVE, DESIGNANALYSIS SPECIFICALLY DISCLAIMS ALL OTHER WARRANTIES,INCLUDING, WITHOUT LIMITATION, ALL IMPLIED WARRANTIESOF MERCHANTABILITY AND FITNESS FOR A PARTICULARPURPOSE.

(iv) UNDER NO CIRCUMSTANCES WILL DESIGN ANALYSIS BE LIABLEFOR SPECIAL, INCIDENTAL, CONSEQUENTIAL, INDIRECT, OR ANYOTHER DAMAGES OR CLAIMS ARISING FROM THE USE OF THISPRODUCT, THIS INCLUDES LOSS OF PROFITS OR ANY OTHERCOMMERCIAL DAMAGES, EVEN IF ADVISED OF THE POSSIBILITYOF SUCH DAMAGES. IN NO EVENT WILL DESIGN ANALYSIS BELIABLE FOR ANY CLAIMS, LIABILITY, OR DAMAGES ARISINGFROM MODIFICATION MADE THEREIN, OTHER THAN BY DESIGNANALYSIS.

(v) Should the exclusive remedy stated in subparagraph 6 (d) (ii) above bedetermined by a proper court of law to have failed of its essential purpose, thelimitation of the obligations of DESIGN ANALYSIS stated in subparagraphs 6(d) (iii) and (iv) shall remain valid.

(vi) THIS LIMITED WARRANTY GIVES USER SPECIFIC LEGAL RIGHTS. USER MAY ALSO HAVE OTHER RIGHTS WHICH VARY FROM STATETO STATE. SOME STATES DO NOT ALLOW LIMITATIONS ON HOWLONG AN IMPLIED WARRANTY LASTS OR THE EXCLUSION OFINCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THOSELIMITATIONS OR EXCLUSIONS MAY NOT APPLY.

W-4 User Agreement/WATERLOG® Warranty H-355

7. BINDING AGREEMENT

This is a binding agreement, and if not understood, USER should seek competent legal advice. By paying for the PRODUCT and opening the package, USER acknowledges to have read thisAgreement and have agreed to be bound by its terms and conditions.

8. COMPLETE AGREEMENT

This agreement is the complete and exclusive statement of the agreement between USER andDESIGN ANALYSIS and supersedes all proposals for prior agreements and understandings,whether oral or written, and all other communications relating to the subject matter of thisagreement.

9. GOVERNING LAW

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

10. U.S. GOVERNMENT RESTRICTED RIGHTS

Use, duplication, or disclosure by the United States Government is subject to restrictions setforth in paragraph (c) (1) (ii) of the rights in Technical Data and Computer Software clause at52.227-7013. The Contractor-manufacturer is DESIGN ANALYSIS ASSOCIATES, INC., 75West 100 South, Logan, Utah 84321.

Chapter 1Introduction To The WATERLOG® Series H-355

H-355 Introduction to the WATERLOG® Series H-355 1-1

1.1 Introduction

The WATERLOG® Series Model H-355 (hereafter "H-355") is a self-contained "smart" gas purgesystem which produces a precision, constant mass flow of gas. Together with a pressuremeasurement device, it is used to measure fluid levels in applications such as surface water(streams and lakes, etc.), ground water and tanks.

The H-355 uses a very efficient compressor to maintain pressure in an internal tank. Undermicroprocessor control, it determines how much pressure is needed in the tank, based on thecurrent head pressure, to produce a constant bubble rate. Hence, the term "smart". Thecompressor and tank replace the dry Nitrogen tank used in previous systems.

The H-355's purge function applies high pressure to the orifice line. This feature is designed toremove any sediment that may have collected in or around the outlet of the orifice line.

The H-355 uses a sophisticated system of sensors and valves to regulate the pressure and thebubble or purge rate. Again, this is done under microprocessor control. This portion of the H-355replaces the sight feed flow controller and pressure regulator (Conoflow system) used inprevious systems.

The H-355 is used primarily with the WATERLOG® Series Model H-350 which performs severaldifferent functions in the system: First, it is the precision pressure measurement source formeasuring the fluid level. This function replaces the manometer in previous systems. Second, itis the terminal through which the H-355 is configured. Third, it can be the data recorder for thesystem, thus removing the need for an external data recorder.

1.2 Key Features

Following is a list of some of the H-355's features:

# Corrosion resistant tank

# Microprocessor controlled

# One-piece manifold eliminates many potential sources of leaks

# Gauge provides visual tank pressure

# Hydrophobic intake membrane, protects compressor

1-2 Introduction to the WATERLOG® Series H-355 H-355

# All components are easily accessible for inspection and maintenance

# Compressor does not have a “Diaphragm”

1.3 How it Works

The H-355 has a precision compressor which maintains pressure in a small tank. Gas flows fromthe tank through a precision restriction to the output port. The pressure across the restriction ismeasured effectively with one pressure transducer. By turning the compressor on and off, themicro controller attempts to maintain a constant pressure across the restriction. Thus maintaininga constant gas flow. The micro controller also compensates for the effects of gas density changewith temperature to maintain a constant flow through the restriction.

1.4 Unpacking the H-355

The following are the items you should have received:

1. WATERLOG® Series H-355 "Smart Gas" system

2. Serial Cable

3. Installation Kit

4. This Owner’s Manual

Please verify you have received these items and any other optional equipment you may haveordered. It is recommended that you visually inspect inside the H-355 enclosure to verify allelectrical connections are secure, where some movement may have occurred during shipment.

1.5 Testing the System

Before installing the H-355, you may wish to test the system in the shop or lab. Testing theH-355 in the shop or lab will familiarize you with the instrument in an environment where it iseasy to work and you are near a telephone if questions should arise.

If you are unable to get the H-355 up and running, refer to Chapter 2 Installation and Section 4.2Trouble Shooting. When you have exhausted all possibilities in the Trouble Shooting section,feel free to call one of our support personnel at (435) 753-2212 for assistance.

Chapter 2Installation

H-355 Installation 2-1

Figure 2-1a. H-355 Bottom Panel

2.1 Installing the WATERLOG® Series Model H-355

For proper installation of the H-355, you will need:

# The H-355

# This Owner's Manual

# Serial cable (provided)

# Installation kit (provided)

Installation instructions for the H-355 may vary somewhat according to your specificapplication.

Figure 2-1a illustrates the physical input/output features on your H-355. This diagram will helpin determining where you should make your connections.

Figure 2-1a also shows the bottom panel where you make connections for power, ground,communications, outlet to orifice, and pressure to your sensor.

2-2 Installation H-355

Figure 2-1b. Control Connector

2.1.1 Introduction

In its simplest form, a gas purge pressure measurement consists of a gas source, a pressuremeasurement device and an orifice tube all connected together in a “T” arrangement. Becausethe H-355 has the capability of purging the orifice line, a more complex connection is required.Do not use a “T” to connect the pressure sensor to the orifice line, use the two ports of theH-355. When using the H-350 as your measurement device, refer to Section 2.2 and Chapter 3.When using another measurement device, refer to Section 2.1.2 and Chapter 3.

2.1.2 Recommended Field Installation Procedures

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

2. Connect the pressure line between the H-355 and your pressure measurement device. Thiscan be done using the H-355-Install kit. This kit is designed for use with the H-350. If yourmeasurement device has different connections, you will need to procure the correct partsfrom your local plumbing supplier. You will need a 1/8" NPT male tubing fitting for thesensor output. It is recommended that you use the 1/8" copper tubing supplied in the installkit. The proper ferrules must be used to insure there are no leaks.

3. The H-355 requires two separate power sources. First is the compressor 12V which powersthe compressor and control valves. This supply is typically a 12V battery (wire and batterynot provided). Second is the 12V which powers the control module. This source is suppliedfrom the pressure measurement device through the interface cable (provided), and into thecontrol connector. Figure 2-1b shows the control connector and lists the pin-out diagram.The color code shows the serial cable wire colors. It is very important to connect thecompressor power first, then the control power second. Refer to Section 3.1.1.

H-355 Command and Response Protocol 2-3

Figure 2-2. H-350 / H-355 Combination Installation

2.2 Connecting a WATERLOG® Series Model H-350

When connecting a model H-350 to your H-355, follow the procedure in Section 2.1.2. However,please note the following:

1. The install kit provided connects the “H-350 Sensor” output of the H-355 directly to the“Pressure Input” of the H-350 without any additional parts.

2. The serial cable provided will be equipped with plugs on both ends for direct connectionbetween the “control” input of the H-355 and the “Auxiliary output” of the H-350.

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

2-4 Command and Response Protocol H-355

2.3 SDI-12 Command and Response Protocol

This is a brief description of the Serial Digital Interface (SDI-12) Command and Responseprotocol used by the WATERLOG® Series Model H-355 sensor. Included is a description of thecommands and data format supported by the H-355.

Refer to the document "A SERIAL DIGITAL INTERFACE STANDARD FOR HYDROLOGICAND ENVIRONMENTAL SENSORS". Version 1.2 April 12, 1996 Coordinated by the SDI-12Support Group, 135 East Center, Logan, Utah.

During normal communication, the data recorder sends an address together with a command to theH-355 sensor. The H-355 then replies with a "response". In the following descriptions, SDI-12commands and responses are enclosed in quotes. The SDI-12 address and the command/responseterminators are defined as follows:

"a" Is the sensor address. The following ASCII Characters are valid addresses:"0-9", "A-Z", "a-z", "*", "?". Sensors will be initially programmed at thefactory with the address of "0" for use in single sensor systems. Addresses"1 to 9" and "A to Z" or "a to z" can be used for additional sensorsconnected to the same SDI-12 bus. Address "*" and "?" are "wild card"addresses which select any sensor, regardless of its actual address.

"!" Is the last character of a command block.

"" Are carriage return (0D) hex and line feed (0A) hex characters. They are thelast two characters of a response block.

Notes:

# All commands/responses are upper-case printable ASCII characters.# Commands must be terminated with a "!" character.# Responses are terminated with characters.# The command string must be transmitted in a contiguous block with no gaps of more

than 1.66 milliseconds between characters.


2.4 Measure Command

The Measure Command causes a measurement sequence to be performed. Data values generatedin response to this command are stored in the sensor's buffer for subsequent collection using "D"commands. The data will be retained in the sensor until another "M" or "V" command is executed.

Command Response Description------------------ ---------------------- ------------------------------------"aM!" "atttn" Initiate measurement

Where:a is the sensor address ("0-9", "A-Z", "a-z", "*", "?").

M is an upper-case ASCII character

ttt is a three digit integer (000-999) specifying the maximum time, in seconds, the sensor will take to complete the command and have measurement data available in its buffer.

n is a single digit integer (0-9) specifying the number of values that will be placed in the data buffer. If "n" is zero (0), no data will be available using subsequent "D" commands.

Upon completion of the measurement, a service request "a" is sent to the data recorderindicating the sensor data is ready. The data recorder may wake the sensor with a break andcollect the data anytime after the service request is received or the specified processing time haselapsed.

H-355 supports two “measure” commands: “aM!” and “aM1". The “aM!” command causes theBubbler to perform a purge sequence. The “aM1" command measures the current Tank and Linepressure values. Examples of these commands are shown below.

SDI-12 was originally designed for sensor applications and has no direct built-in support forcontrolling “non sensor” devices such as the H-355 bubbler. The H-355 uses the “aM!” commandin a somewhat non-standard way to cause the bubbler to perform a purge sequence. The H-355initiates a purge sequence when the Data Recorder issues an “aM!” command. No sensor“measurement” is actually made. The H-355 reports a measurement time of the maximum possiblepurge time (240 sec purge + 30 sec wakeup delay + 2 sec margin). Upon completion of the purge,a “a,” service request is sent to the Data Recorder.


Example of a H-355 "aM!" command:

Command Response Time Values Description------------- --------------------- ------- -------- ------------------------------- "aM!" "a2721" 272 sec 1 Perform a Purge

Subsequent Command Response--------------------------- ------------------------------------"aD0" a+1

Where: +1 = Dummy value indicating completion of a purge

Example of a H-355 "aM1!" command:

Command Response----------------------- ------------------------------------------ "aM1!" "a0043"

Subsequent Command Response--------------------------- ------------------------------------"aD0" +X.X+Y.Y,Z.Z

Where:X.X = Current tank pressure (psi)Y.Y = Current line pressure (psi)Z.Z = Restriction pressure (tank-line)

The “aM1" command “measures” the current Tank and Line pressure values. The current pressurevalues are placed in the sensor buffer.


Example of a H-355 "aD0!" command:

Previous command Response----------------------- ------------------------------------------ "aM1!" "a0043"

Subsequent Command Response--------------------------- ------------------------------------"aD0" +X.X+Y.Y,Z.Z Where:X.X = Current tank pressure (psi)Y.Y = Current line pressure (psi)Z.Z = Restriction pressure (tank-line)

2.5 Send Data Command

The Send Data command returns sensor data generated as the result of previous "aM!", or "aV!"commands. Values returned will be sent in 33 characters or less. The sensor's data buffer will notbe altered by this command.

Command Response------------- --------------------------------------"aD0!" through "aD9!" "apd.d ... pd.d"


D0..D9 are upper-case ASCII characters.

p Is a polarity sign (+ or -)

d.d represents numeric digits before and/or after the decimal. A decimal may beused in any position in the value after the polarity sign. If a decimal is notused, it will be assumed to be after the last digit.

For example: +3.29 +23.5 -25.45 +300

If one or more values were specified and a "aD0!" returns no data (a only), it meansthat the measurement was aborted and a new "M" command must be sent.

The following is an example of the "aD0!" command.


Example of a H-355 "aV!" command:

Command Response Time Values Description------------- --------------------- ------- -------- --------------------------- "aV!" "a0023" 2 sec 3 Return fixed data and diagnostic

data for testing purposes.

Subsequent Command Response--------------------------- --------------------------------------------"aD0" a+123.456+78.9+y

Key Description Units------------- ------------------------- ---------------------------- +123.456 Fixed test data +78.9 Fixed test data y ROM checksum test 0 = Failed, 1 = Passed

2.6 Initiate Verify Command

The Verify Command causes a verify sequence to be performed. The result of this command issimilar to the "aM1!" command except that the values generated are fixed test data and the resultsof diagnostic checksum tests. The data generated in response to this command is placed in thesensor's buffer for subsequent collection using "D" commands. The data will be retained in thesensor until another “M” or “V” command is executed.

Command Response Description------------- ------------------------- ---------------------------"aV!" "atttn" Initiate verify sequence


V is an upper-case ASCII character.

ttt is a three digit integer (000-999) specifying the maximum time, in seconds,the sensor will take to complete the command and have data available in its buffer.

n is a single digit integer (0-9) specifying the number of values that will beplaced in the data buffer. If "n" is zero (0), no data will be available usingsubsequent "D" commands


2.7 Send Acknowledge Command

The Send Acknowledge Command returns a simple status response which includes the address ofthe sensor. Any measurement data in the sensor's buffer is not disturbed.

Command Response------------- -------------------------"a!" "a"

Where:a Is the sensor address ("0-9", "A-Z", "a-z", "*", "?").

2.8 Send Identification Command

The Send Identification command responds with sensor vendor, model, and version data. Anymeasurement data in the sensor's buffer is not disturbed.

Command Response------------- ------------------------------------------------------------"aI!" "allccccccccmmmmmmvvvxx...xx"


I is an upper-case ASCII character.

ll is the SDI-12 version compatibility level, e.g. version 1.2 is represented as"12".

cccccccc is an 8 character vendor identification to be specified by the vendor andusually in the form of a company name or its abbreviation.

mmmmmm is a 6 character field specifying the sensor model number.

vvv is a 3 character field specifying the sensor version number.

xx...xx is an optional field of up to a maximum of 13 characters to be used forserial number or other specific sensor information not relevant to operationof the data recorder.


Example of a H-355 "aI!" command:

"a12 DAA H-355vvvS#nnnnnnVkkk"

H-355 implementation of the optional 13 character field:S#nnnnnnVkkk (12 bytes total)

Where: "nnnnnn" is a six character sensor serial number"kkk" is a three digit sensor firmware revision level

Example of a "Change Sensor Address" command:

Command Response Description------------- ------------------------ ----------------------------"aA2!" "2" Change sensor address to "2"

2.9 Change Sensor Address

The Change Sensor Address Command allows the sensor address to be changed. The address isstored in non-volatile EEPROM within the sensor. The H-355 will not respond if the commandwas invalid, the address was out of range, or the EEPROM programming operation failed.

Command Response Description------------- ------------------------- ---------------------------"aAn!" "n" Change sensor address

Where:a is the current (old) sensor address ("0-9", "A-Z", "a-z", "*", "?"). An ASCII

"*" may be used as a "wild card" address if the current address is unknownand only one sensor is connected to the bus.

A is an upper-case ASCII character.

n is the new sensor address to be programmed ("0-9", "A-Z", "a-z", "*", "?").

NOTE: To verify the new address use the "Identify Command."


Example of a H-355 Extended "Read Bubble Rate" command:

Command Response Time Values Description------------------- ------------------------ ------ --------- -----------------------------"aXRBR!" "a0031" 3 sec 1 Read Bubble Rate

Command Response Description------------------- ------------------------ -----------------------------"aD0!" "a+60.0" Bubble Rate is 60 bubbles/min

2.10 Extended Read Parameter Commands

The Bubble-Rate, Purge-Pressure and Purge-Time settings of the H-355 can be examined with thefollowing commands:

Command Response Description------------- ------------------------- -----------------------------"aXRBR!" "a0031" Read Bubble Rate"aXRPP!" "a0031" Read Purge Pressure"aXRPT!" "a0031" Read Purge Time

Where:a is the sensor address ("0-9", "A-Z", "a-z", "*", "?").XRBR are upper case characters.XRPP are upper case characters.XRPT are upper case characters.

This command takes 003 seconds to complete and places 1 value in the data buffer. Use the “aD0"command to collect and view the current value.


Example of a H-355 Extended "Write Bubble Rate" command:

Command Response Time Values Description------------------- ------------------------ ------ --------- -----------------------------"aXWBR72.0!" "a0041" 4 sec 1 Write Bubble Rate

Command Response Description------------------- ------------------------ ----------------------------"aD0!" "a+72." Bubble rate verified at 72.0

2.11 Extended Write Parameter Commands

With these commands you can change the Bubble-Rate, Purge-Pressure or Purge-Time settings.

Command Response Description Valid Range------------- ------------------------- ----------------------------- -----------------------"aXWBRddd!" "a0041" Write Bubble Rate 30 to 120 psi"aXWPPddd!" "a0041" Write Purge Pressure 15 to 80 psi"aXWPTddd!" "a0041" Write Purge Time 30 to 240 seconds

Where:a is the sensor address ("0-9", "A-Z", "a-z", "*", "?").XWBR are upper case characters.XWPP are upper case characters.XWPT are upper case charactersddd is the new value. The input format is very flexible. Some examples are

shown below. 20.0 200+50.0

This command takes 004 seconds to complete and places 1 value in the data buffer. If the newvalue is not in the proper range, the sensor response will be an ASCII message; “must be 30 thru120", or similar. You may not see this message if your Data Recorder does not support an ASCIIsensor response in the SDI-12 “transparent” mode.

The data value placed in the data buffer is a “readback” of the new value. Use the “aD0"command to collect and view the readback value to check for proper programing. Alternativelyyou can read the settings by issuing the “read” commands as explained in the previous section.

Chapter 3Operation

H-355 Operation 3-1

3.1 Normal Pumping Operation

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

a: If the compressor 12V supply is below 9.0 volts, the compressor will not turn on. This is toprevent further discharge of an already stressed battery.

b: The compressor will not turned on if any pumping operation within the previous elapsed 24hours failed. This allows the battery charger to charge the battery without the compressordraining the battery as fast as it is charged.

Once the compressor is turned on, the battery voltage is no longer monitored by the microcontroller. If the compressor runs longer than 120 seconds while pumping the tank to the properpressure, the micro controller turns off the compressor and disables all further pumping operationsfor 24 hours.

3.1.1 Pumping with the H-350 Attached

While servicing the H-350, this self-protection feature can be inadvertently activated if the 12Vcontrol power is disconnected while the compressor is running. You can recover from this 24hour lockout condition by momentarily disconnecting the 12V control power to reset the microcontroller.

3.1.2 Purge Pumping

When a purge sequence is initiated, the compressor is activated to pump the tank to the desiredpurge pressure. The micro controller makes pumping tests, as explained above in Section 3.1,with the exception of allowing up to 300 seconds for the pumping sequence to complete.

3.2 Operation with the H-350 Pressure Transducer Attached

The following is a description of the submenus used for configuring the H-355 via the H-350Pressure Transducer. Each of these menu items can be changed using the instructions in Section3.3.1, 3.3.2, and 3.5 of the H-350 users manual.

3-2 Operation H-355

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.X

Last Prg=MM/DD HH:MM

The H-350 can sense when the orifice line is restricted or plugged. The H-355 can be configuredto do an automatic purge of the orifice line when it becomes necessary. This menu item turns theauto purge on or off.

Auto Purge Enbl[OFF]

This refers to the number of bubbles per minute that are flowing from the end of the orifice tube. The programmable range is 30 to 120 bubbles per minute.

Bubble Rate[XXX]/min

This sets the purge threshold. If the orifice line pressure reaches the purge threshold, the H-350will initiate an auto purge. If the purge is successful, normal operation will continue. If the purgefails, the H-355 will not try another purge until 24 hours later. The H-355 enters this mode ofoperation to preserve the battery in case of a plugged orifice. The range of “Purge Thresh” is 10to 65 psi.

Purge Thresh[XXX]PSI

Below is the pressure that the H-355 uses to purge the orifice line. The range is 15 to 80 psi. Setthis value to a pressure which would reasonably purge sediment and debris from the orifice. Keepin mind that the higher pressures require more energy from the battery.

Purge Presur[XXX]PSI

H-355 Operation 3-3

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

Purge Time: [XXXsec

Pressing on this item will cause the H-355 to perform a purge using the current purgesettings.

Manual Purge: ENT=Y

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

Timed Prg: [XX] days

This is the current pressure of the H-355's internal air tank in psi. This value is informative onlyand cannot be edited. The tank pressure should be approximately 3-5 PSI greater than the orificepressure.

Tank PSI = XX.X

This represents 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 rateand should be approximately 3-5 PSI.

Diff PSI = XX.X

This is where the last purge executed by the H-355 is recorded. The month and day, hour andminute are displayed.

Last Prg=MM/DD HH:MM

If the auto-purge feature of the H-350 is enabled, the H-350 is responsible for initiating H-355purges. Whenever the H-350 makes a measurement, it compares the pressure data with the “PurgeThreshold” value. If the pressure is greater than the Purge Threshold, the H-350 instructs theH-355 to initiate a purge sequence. During the purge, the H-350 energizes its internal auto-zerovalve to isolate the H-350's precision sensor from the purge pressure. At the completion of thepurge, the H-350 keeps its auto-zero valve energized for an additional 2.0 seconds. This is doneto prevent damage to the H-350's precision sensor in case the orifice is plugged and the orifice linemomentarily holds the full purge pressure. A pressure relief valve in the H-355 vents the overpressure to atmosphere during the 2 second delay.

After completion of a purge sequence, the H-350 makes another pressure measurement. If thepressure is still greater than the Purge Threshold value, the H-350 knows the purge failed. It thenactivates a timer which disables further purges for the next 24 hours. This is done to prevent aplugged orifice form causing continuous purges which would quickly drain the battery.

3-4 Operation H-355

3.3 Stand-Alone Operation

The H-355 gas purge system can be used “stand-alone” with other pressure measurement devicesthan the H-350. You do lose some flexibility in that you cannot edit the operational settings in thefield and the purge feature cannot be coordinated with a pressure measurement such that pressuremeasurements are not made during a purge.

To operate in this manner, you must provide your own precision pressure measuring device.

When operating stand-alone, the factory preset values are: (refer to Section 3.2)

Bubble Rate: 60 Bub/minPressure to Purge With: 40 PSIPressure to Initiate a Purge: 20 PSIPurge Time: 45 sec

Each of these values can be factory preset within the allowable ranges as defined in Section 3.2.The factory must be notified of range requirements prior to shipment.

WARNING: THERE IS A DISTINCT POSSIBILITY OF DESTROYING YOURPRESSURE SENSOR. THIS CAN BE AVOIDED BY INSTALLING AMANUAL VALVE BETWEEN THE H-355 AND YOUR SENSOR.

If a purge does not clear a plugged orifice line, the purge pressure will beapplied to the sensor output of the H-355. When operating the H-355 with asensor other than the H-350, the purge pressure could be applied to your sensorbefore the H-355's internal pressure relief valve relieves the pressure. It is yourresponsibility to verify that your sensor can handle the purge pressure, or installa manual valve on the sensor output of the H-355. The valve must be closedprior to a purge and remain closed until the purge is completed, or until the tankpressure falls below your sensor’s maximum pressure rating.

USING THE H-350 FOR YOUR MEASUREMENT DEVICE WILLAVOID THIS CONDITION.

H-355 Operation 3-5

3.4 Manual Purge

This feature allows the H-355 to perform a purge at any time whether it is connected to an H-350or being used stand-alone. This feature allows you to clear a plugged orifice or verify an orifice isclear.

Located inside the H-355 enclosure, on the top outer edge of the control module, is the ManualPurge button. Pressing this for one to two seconds initiates a purge sequence. The compressorwill be turned on and the tank pressure raised to the “Purge Pressure”. During this time, thebubbler rate will rise proportionally with the pressure. Next, the compressor is turned off and avalve actuated to dump the tank directly to the orifice line. During this time, the orifice shouldproduce vigorous bubbling with the bubble rate falling to zero. After a delay equal to the “PurgeDelay”, the purge valve is closed and the compressor is again turned on to restore the bubble rateto its normal value.

Note: When the button is pressed, if the tank pressure is already higher than the “Purge Pressure”the compressor will not be energized.

Chapter 4Maintenance/Trouble Shooting

H-355 Maintenance/Trouble Shooting 4-1

4.1 MaintenanceSustained operation of the H-355 is almost maintenance-free. You will need to ensure that yourpower supply is sufficient for the equipment that you have installed. (See Appendix ASpecifications for power consumption information.) Because the compressor will only run for afew seconds several times each day, it will last for many years. There are provisions in softwarethat will not allow the H-355 to enter a condition where the compressor runs continuously for longperiods of time. This will protect the pump and many other components of the H-355 in case of aplugged orifice or other malfunction.

From time to time you should check the inlet line filter (located between the manifold and thesuction side of the pump) for any blockage or restriction. If blockage or restriction is present, thefilter should be replaced.

All fittings must be secure. At 60 bubbles/minute, even a tiny leak will allow the entire gas flowto escape.

4.2 Trouble ShootingIt is unlikely that this manual will ever contain trouble shooting tips to cover every problem thatwill be encountered. Feedback from customers is very valuable and greatly aids in the quest forconstant product enhancement. Please feel free to call the factory for technical assistance and alsowith solutions you have found to past problems.

Our experience with pressure transducers has taught us a lot about the problems associated withfield deployable equipment. The following list of problems and possible solutions willundoubtedly grow with subsequent revisions of this manual and may be helpful to you.

4.2.1 H-350 reports “H-355 NOT RESPONDING”1) Verify power to the H-355, then reinitialize power up sequence using the instructions

in Section 2.1.2.

2) Check all connections including POWER, GND and the communication connector. Both the compressor and control power sources must be connected.

4.2.2 Intermittent Operation1) Check your power and ground connections. Moisture over time will oxidize and

corrode connectors and pins.

2) Verify your power supply or battery voltage.

3) The H-355 has some safety features which may interrupt operation. Refer toSections 2.1.2 and 3.1.

Appendix ASpecifications

H-355 Specifications A-1

ENVIRONMENTStandard Operating Range: -40E to 60E CStorage: -50E to 80E CIt is recommended to install unit in weather shielded enclosure.

GAS DELIVERYParticulars: Microprocessor controlled unitGas Flow Technology: Constant mass flowGas Flow Control: Bubble rate is user selectable from

30 to 120 bubbles per minuteAuto zero error controlled flow nozzle

(patent application in process)(NO NEEDLE VALVE PROBLEMS)

CompressorType: HI-REL medical grade ISO 9003 qualified

piston compressor (NO BROKEN DIAPHRAGMPROBLEMS)

Operation: Low duty cycle (5 hours typical runtime per year at 60bubbles per minute flow rate)

Purge FunctionsPurge Pressure Level: User Selectable 15 PSI to 80 PSIOptions: Ë Manual

Ë Internally sensed requirementË Automatic timed intervalË Remote controlled

CONTROL INTERFACE

RS - 485 Electrical SpecificationProtocol: FlexibleCommands: Half-duplex, 8 bit, no parity, 1 stop bitBaud rate: 9600

POWER REQUIREMENTSQualified for 12 volt battery operationTwo Supply Inputs: Ë electronics supply via the RS-485 cable

(10 to 16 volts)f: compressor supply (10 to 16 volts)

Total 24 hour average current draw: 15 milliamperesBased on a 60 bubbles per minute flow rate

MECHANICAL

PhysicalEnclosure: Sealed corrosion resistant fiberglassSize: 10.5 in. wide x 12.5 in. long x 6.0 in.

deepWeight: 12 poundsMounting: Hardware supplied for wall mountingPressure Outlet: 1/8 in. FNPTSensor Pressure Outlet: 1/8 in. FNPTReserve Tank Inlet: 1/8 in. FNPT (80 PSI MAX)Pressure relief valve: Iincluded

MISCELLANEOUS

Ordering InformationH355 Base model numberH355/000 Standard H355 "Smart-gas" systemH355/350 Combination H355 "Smart-gas" system and H350

pressure measurement systemH355/HRI High Reliability H355 with extra compressor and

auxiliary bottled gas supply control

WarrantyWATERLOG® H-355 is warranted against defects in materials andworkmanship for one year from date of shipment.

Appendix BDry Air System

H-355 Dry Air System B-1

Figure B-1 shows a typical H-355 dry air system.

The following is the instruction manual for the desiccant dryer.

B-2 Dry Air System H-355

Documents

P:WATERLOGH355(Bubbler)Manualv1.2Entire H-355 Manual · 2014. 10. 4. · Chapter 1 Introduction To The WATERLOG® Series H-355 H-355 Introduction to the WATERLOG® Series H-355 1-1