Teledyne 730 Bubbler Operating instructions

730 Bubbler Module
Installation and Operation Guide
Part #60-9003-063
Copyright © 1995. All rights reserved, Teledyne Isco, Inc.
Revision K, May 9, 2007

Foreword
This instruction manual is designed to help you gain a thorough understanding of the
operation of the equipment. Teledyne Isco recommends that you read this manual
completely before placing the equipment in service.
Although Teledyne Isco designs reliability into all equipment, there is always the possi-
bility of a malfunction. This manual may help in diagnosing and repairing the malfunc-
tion.
If the problem persists, call or e-mail the Teledyne Isco Technical Service Department
for assistance. Simple difficulties can often be diagnosed over the phone.
If it is necessary to return the equipment to the factory for service, please follow the
shipping instructions provided by the Customer Service Department, including the
use of the Return Authorization Number specified. Be sure to include a note
describing the malfunction. This will aid in the prompt repair and return of the
equipment.
Teledyne Isco welcomes suggestions that would improve the information presented in
this manual or enhance the operation of the equipment itself.
Teledyne Isco is continually improving its products and reserves the right to
change product specifications, replacement parts, schematics, and instruc-
tions without notice.
Contact Information
Customer Service
Phone: [phone] (USA, Canada, Mexico)
[phone] (Outside North America)
Fax: [phone]
Email: [email protected]om
Technical Service
Phone: [phone] (Analytical)
[phone] (Samplers and Flow Meters)
Email: [e-mail]
Return equipment to: 4700 Superior Street, Lincoln, NE 68504-1398
Other Correspondence
Mail to: P.O. Box 82531, Lincoln, NE 68501-2531
Email: [email protected]
Web site: www.isco.com
Revised September 15, 2005

730 BubblerModule
Safety
iii
730 BubblerModule
Safet y
General Warnings Before installing, operating, or maintaining this equipment, it is
imperative that all hazards and preventive measures are fully
understood. While specific hazards may vary according to
location and application, take heed in the following general
warnings:
WARNING
This instrument has not been certified for use in
“hazardous locations” as defined by the National Electrical
Code.
WARNING
Avoid hazardous practices! If you use this instrument in
any way not specified in this manual, the protection
provided by the instrument may be impaired; this will
increase your risk of injury.
AVERTISSEMENT
Éviter les usages périlleux! Si vous utilisez cet instrument
d’une manière autre que celles qui sont specifiées dans ce
manuel, la protection fournie de l’instrument peut être
affaiblie; cela augmentera votre risque de blessure.
This product is often installed in confined spaces. Some examples
of confined spaces are manholes, pipelines, digesters, and storage
tanks. These spaces may become hazardous environments that
can prove fatal for those unprepared. These spaces are governed
by OSHA 1910.146 and require a permit before entering.
Hazard Severity Levels This manual applies Hazard Severity Levels to the safety alerts,
These three levels are described in the following sample alerts.
CAUTION
Cautions identify a potential hazard, which if not avoided, may
result in minor or moderate injury. This category can also warn
you of unsafe practices, or conditions that may cause property
damage.
WARNING
Warnings identify a potentially hazardous condition, which
if not avoided, could result in death or serious injury.

730 BubblerModule
Safety
iv
DANGER
DANGER – limited to the most extreme situations
to identify an imminent hazard, which if not
avoided, will result in death or serious injury.
Hazard Symbols The equipment and this manual use symbols used to warn of
hazards. The symbols are explained below.
Hazard Symbols
Warnings and Cautions
The exclamation point within the triangle is a warning sign alerting you of
important instructions in the instrument’s technical reference manual.
The lightning flash and arrowhead within the triangle is a warning sign alert-
ing you of “dangerous voltage” inside the product.
Pinch point. These symbols warn you that your fingers or hands will be seri-
ously injured if you place them between the moving parts of the mechanism
near these symbols.
Symboles de sécurité
Ce symbole signale l’existence d’instructions importantes relatives au pro-
duit dans ce manuel.
Ce symbole signale la présence d’un danger d’électocution.
Risque de pincement. Ces symboles vous avertit que les mains ou les
doigts seront blessés sérieusement si vous les mettez entre les éléments
en mouvement du mécanisme près de ces symboles
Warnungen und Vorsichtshinweise
Das Ausrufezeichen in Dreieck ist ein Warnzeichen, das Sie darauf
aufmerksam macht, daß wichtige Anleitungen zu diesem Handbuch
gehören.
Der gepfeilte Blitz im Dreieck ist ein Warnzeichen, das Sei vor “gefährlichen
Spannungen” im Inneren des Produkts warnt.
Vorsicht Quetschgefahr! Dieses Symbol warnt vor einer unmittelbar dro-
henden Verletzungsgefahr für Finger und Hände, wenn diese zwischen die
beweglichen Teile des gekennzeichneten Gerätes geraten.

v
730 Bubbler Module
Table of Contents
Section 1 Introduction
1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1.2 Connecting to the Sampler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
1.3 Installation Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
1.4 Calibrating the Bubbler Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
1.5 Power Consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
1.6 General Mounting Considerations for the Bubbler. . . . . . . . . . . . . . . . . . . . . . . . . 1-3
1.6.1 Line Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
1.6.2 Attach the Bubble Line to the Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
1.6.3 Bubble Line Position in the Stream . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
1.6.4 Bubble Line Extensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
1.6.5 Installing the Bubble Line in a Primary Device . . . . . . . . . . . . . . . . . . . . . 1-4
Section 2 Programming the Module
2.1 Module Screens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2.2 Programmed Enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2.3 Data Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2.3.1 Recovering Module Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2.4 Operation of the Bubbler System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
2.4.1 Purges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
2.4.2 Automatic Drift Compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
2.5 Alternative Flow Measurement Systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Section 3 Installation Methods
3.1 Installation in Round Pipes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
3.1.1 Flow Metering Inserts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
3.1.2 Spring Rings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
3.1.3 Scissors Rings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
3.1.4 Street Level Installation System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
3.2 Other Installation Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
3.2.1 Rectangular, Trapezoidal, and Earthen Channels . . . . . . . . . . . . . . . . . . . 3-5
3.2.2 U-Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
3.2.3 Non-Standard Installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
Section 4 Maintenance
4.1 Desiccant Reactivation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
4.2 Hydrophobic Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
4.3 Bubble Line Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
4.4 Repairing The Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
4.5 Flash Memory and Software Upgrades . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Appendix A Accessories List

730 Bubbler Module
Table of Contents
vi
Appendix B Technical Specifications
Appendix C Material Safety Data Sheets
List of Figures
1-1 730 Module Mounted on Sampler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
2-1 Sample Reports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
2-2 Sampler Programming: 730 Module Screens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
2-3 Sampler Programming: 730 Module Setup Screens . . . . . . . . . . . . . . . . . . . . . . . . 2-4
2-4 Sampler Programming: 730 Module Quick View Screens . . . . . . . . . . . . . . . . . . . 2-5
3-1 Spring Ring (6 to 15 inches) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
3-2 Scissors Ring Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
3-3 Bubbler Carrier Mounted on Scissors Ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
3-4 Typical installation methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
List of Tables
2-1 Flow Conversion Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
A-1 Parts and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
B-1 Technical Specifications for the 730 Bubbler Module . . . . . . . . . . . . . . . . . . . . . . B-1

1-1
730 Bubbler Module
Section 1 Introduction
1.1 Introduction The 730 Bubbler Module is one of Teledyne Isco’s inter-
changeable modules for the Avalanche and 6700 Series Sam-
plers. The module uses a differential pressure transducer and a
flow of bubbles to measure liquid levels up to ten feet. The
bubbler is unaffected by wind, fluctuations in air or liquid tem-
peratures, turbulence, steam, foam on the surface, corrosive
chemicals, debris, oil, floating grease, or lightning.
You can install the module only on a 6712 or 6700 controller. The
bubble line can be used in nearly any location with a known
level-to-flow relationship.
Figure 1-1 730 Module Mounted on Sampler
WARNING
The module has not been approved for use in hazardous
locations as defined by the National Electrical Code.
Installation of this module in a hazardous location may
cause fire or explosion resulting in death, personal injury,
or property damage. Before installing any device in a
dangerous location, review safety precautions in your
sampler manual. Check applicable guidelines, codes and
regulations of federal, state, city, and county agencies.

730 Bubbler Module
Section 1 Introduction
1-2
1.2 Connecting to the
Sampler
To install the module:
1. Turn the sampler off.
2. Remove the connector cap in the module bay and move it
aside.
3. Slide the module into the bay.
4. Push against the module to be sure the connector is fully
seated.
To remove the module:
1. Turn the sampler off.
2. Press the silver button on top of the module and pull the
module from the bay.
3. Replace the connector cap in the module bay.
1.3 Installation Checklist 1. Check the desiccant cartridge. Make sure the desiccant is
active (blue in color) and remove the red cap.
2. Install the module and turn the sampler on.
3. Install the bubble line in the flow stream.
4. Connect the bubbler line to the module.
5. Program the sampler and calibrate the module’s level read-
ing.
6. Run the program.
Note
You should install the module before turning the controller on.
When the controller is turned on, it looks for a module. The
controller will not recognize a newly installed module if it is not
seen during this power-up routine. If you install a module while
the controller is already on, turn the controller off and then on
again to reconfigure the controller to use with the module.
1.4 Calibrating the
Bubbler Module
After the sampler, module, and bubble line have been installed at
the site, calibrate the module by measuring the depth of the
water and adjust the reading to match.
It is possible to calibrate the module in a container of water. Use
a bubble line of the same length as the one at the installation site
to get an accurate and reliable calibration.
1.5 Power Consumption The 730 Module consumes a considerable amount of power. A
nickel–cadmium battery may not be sufficient to finish a sample
routine. For example, the battery should be expected to complete
three sampling routines of 24 samples, each sample 200 ml, at
one sample per hour with a 10 foot suction line and a 5 foot head.
But if the routine is changed to 24 samples, 4 samples per bottle,
each sample 250 ml, at 15 minute intervals, with the same
suction line and head height, the battery does not have the
capacity to complete one routine. Teledyne Isco recommends
using a lead–acid battery or a 913 or 923 power pack when using
the 730 Bubbler Module.

730 Bubbler Module
Section 1 Introduction
1-3
1.6 General Mounting
Considerations for the
Bubbler
This section contains some general information regarding the
installation of the 730 module. More detailed installation infor-
mation can be found in Section 3 Installation Methods.
1.6.1 Line Length A standard 25 foot (7.6 m) length of 1/8" (0.32 cm) ID vinyl line is
shipped with the module. We recommend that you do not use
lengths longer than 25 feet. Please consult with the factory if
your installation requires a nonstandard setup.
Cut the bubble line to the shortest usable length. This will min-
imize friction head effects in the line and also will reduce the
amount of line exposed to cuts, kinks, etc. This will also improve
the response time to changing levels and make the purge more
effective.
The bubble line should be routed and secured so that it does not
disturb the flow. Do not kink the tubing or restrict the airflow by
over-tightening the mounting hardware.
1.6.2 Attach the Bubble Line
to the Module
The vinyl bubble line attaches directly to the barbed fitting.
Simply push the tubing over the fitting.
1.6.3 Bubble Line Position in
the Stream
The bubble line outlet does not need to be at the bottom of the
stream. In fact, positioning the bubble line outlet above the
bottom can be beneficial if the stream carries large amounts of
solids or is subject to silting.
The simplest installation method attaches the bubble line to the
side of the flow stream with the bubble line outlet positioned
below the lowest expected level.
To measure the liquid level down to the actual “zero” level of the
primary device, Teledyne Isco recommends placing the bubble
line outlet at least 1 to 2 inches (2.5 to 5.1 cm) below the
primary device “zero” level to avoid measurement failures when
the liquid level is even with the outlet. The module cannot accu-
rately measure levels that are even with or below the bubble line
outlet.
Barbed Fitting
Vinyl Bubble Line
A
B
A. The recommended depth ranges from
the bottom to 1 inch below the zero level.
B. This position would be unable to
measure low levels through the primary
device.
Recommen
d
e
d
Bubble Outlet Depth
Zero

730 Bubbler Module
Section 1 Introduction
1-4
1.6.4 Bubble Line
Extensions
For some applications, a stainless steel tube may be easier to
install in the flow stream than the plastic bubble line because of
its relative rigidity. The vinyl bubble line attaches by simply
slipping the vinyl tube over the end of the extension. Contact
your Teledyne Isco representative about purchasing a stainless
steel bubble line extension.
A copper extension to the bubble line is advantageous in applica-
tions where algae tends to grow in the bubble line. The copper
salts released by the tubing are algicides that tend to inhibit the
growth of algae. However, the copper tubing may not be com-
patible with the flow stream. Attach the copper bubble line
extensions to the bubble line in the same way as the stainless
steel extensions.
1.6.5 Installing the Bubble
Line in a Primary
Device
Primary devices such as weirs or flumes will usually specify a
head (level) measurement point. It is important to place the
bubble line outlet at this point to convert levels to flow rates cor-
rectly. For more details about locating the head measurement
point, refer to the Isco Open Channel Flow Measurement
Handbook, or to information provided by the primary device
manufacturer.
Flume Bubble Line Fittings – Because of the variety of
primary measuring devices and installations, no comprehensive
bubble line installation instructions are practical. However, there
are valid general observations on bubble line installation that
can be made. You can have most flumes specified to include a
bubbler fitting. In new construction, this is highly recommended.
It may even be possible to modify an existing installation to
include a permanent bubbler fitting.
Stilling Wells – If the primary device includes a stilling well,
you should install the bubble line in the stilling well. However,
not all stilling wells are suitable for bubble line installation. If
the well is subject to silting or buildup of foreign material, you
should probably avoid it and mount the bubble line in the flow
stream proper.
Open Channel Installation – Attach the bubble line to the
side of the flow channel or flume. Make the attachment so it
causes a minimum amount of disturbance to the flow stream. If
possible, cut a groove in the side of the channel, place the bubble
line in the groove, and then grout over the groove.
Alternately, you can attach the bubble line to the side of the
channel, and then grout over the line to form smooth, sloped
lead-in and lead-out surfaces. However, you may simply attach
the bubble line to the side of the channel or the upstream side of
a weir.
Note
When installing the bubble line in a high-velocity flow stream
(exceeding 5 ft/sec or 1.5 m/sec), please consult with the Tele-
dyne Isco Customer Service Department for recommenda-
tions.

2-1
730 Bubbler Module
Section 2 Programming the Module
2.1 Module Screens When the controller is configured with the module, it adds the
necessary screens for programming. The screens appear on the
following pages in Figures 2-2 through 2-4. These figures outline
the steps for module programming and calibration. For 6712 pro-
gramming and general programming information refer to the
sampler manual.
2.2 Programmed Enable When the 730 Module is installed, additional sampler enable
options are available. If programmed for LEVEL ONLY the
option will be LEVEL. If programmed for FLOW METER the
options will be LEVEL and FLOW. For more information about
programmed enables, refer to the sampler manual.
2.3 Data Storage When the sampler is configured for use with the module, a
memory partition is reserved. The module readings are stored in
this sampler memory partition. For more information on data
storage and partition management, see the sampler manual.
2.3.1 Recovering Module
Data
The stored module data can be collected or viewed as “reports.”
Three of the sampler reports contain module information, and
are shown in Figure 2-1. Refer to the Sampler Instruction
Manual for collecting and reading the reports.
Note
An * (asterisk) appears next to the reading if the module was
unable to take a reading. If an asterisk appears, the reading
displayed is the last available reading.

730 Bubbler Module
Section 2 Programming the Module
2-2
Figure 2-1 Sample Reports
SAMPLER ID# 11343009 15:25 13-SEP-03
*********** PROGRAM SETTINGS ***********
----------
SITE DESCRIPTION:
"FACTORY "
----------
UNITS SELECTED:
LENGTH: ft
----------
UNITS SELECTED:
FLOW RATE: cfs
FLOW VOLUME: Mgal
----------
BUBBLER MODULE:
WEIR
90
V-NOTCH
----------
1 MINUTE
DATA INTERVAL
----------
24, 1000 ml BTLS
10 ft SUCTION LINE
----------
PACING:
TIME, EVERY
0 HOURS, 15 MINUTES
----------
DISTRIBUTION:
SEQUENTIAL
200 ml SAMPLES
----------
5 MINUTE DELAY TO
FIRST SAMPLE
RUN PROGRAM ONCE
---------------------------------------
SAMPLER ID# 11343009 15:25 13-SEP-03
BUBBLER MODULE: 638324458
*********** COMBINED RESULTS ***********
SITE: FACTORY
Program Started at 08:41 SAT 13-SEP-03
Nominal Sample Volume = 200 ml
FLOW TOTAL
RATE FLOW
SAMPLE BOTTLE TIME cfs Mgal
------- ------ ---- --------- ----------
1 1 08:41 2.495 0.000000
1 2 08:56 2.576 0.016941
1 3 09:11 2.666 0.034698
1 4 09:26 2.773 0.052914
1 5 09:41 2.773 0.071707
1 6 09:56 2.798 0.090520
1 7 10:11 2.798 0.109314
1 8 10:26 2.798 0.128112
1 9 10:41 2.751 0.146911
1 10 10:56 2.773 0.165698
1 11 11:11 2.798 0.184556
1 12 11:26 3.728 0.206933
1 13 11:41 3.728 0.232024
1 14 11:56 3.728 0.257108
1 15 12:11 3.728 0.282171
1 16 12:26 5.273 0.317318
1 17 12:41 5.239 0.352755
1 18 12:56 6.651 0.396903
1 19 13:11 6.651 0.441689
1 20 13:26 6.651 0.486476
1 21 13:41 6.651 0.531238
1 22 13:56 6.651 0.575999
1 23 14:11 3.404 0.611500
1 24 14:26 3.425 0.634426
----------------------------------------
Flow Summary - 13 SEP-03 (FR)
Flow at "FACTORY " Site
On 13-SEP-03
BUBBLER MODULE: 638324458
Day's Flow: 0.678964 Mgal
Average Flow Rate: 3.466 cfs
12:45 Maximum Flow Rate: 6.689 cfs
14:49 Minumum Flow Rate: 1.442 cfs
Hourly Average Flow Rate:
00:00-01:00: NO DATA 12:00-13:00: 5.385 cfs
01:00-02:00: NO DATA 13:00-14:00: 6.651 cfs
02:00-03:00: NO DATA 14:00-15:00: 2.591 cfs
03:00-04:00: NO DATA 15:00-16:00: 1.593 cfs
04:00-05:00: NO DATA 16:00-17:00: END DATA
05:00-06:00: NO DATA 17:00-18:00: NO DATA
06:00-07:00: NO DATA 18:00-19:00: NO DATA
07:00-08:00: BEGIN DATA 19:00-20:00: NO DATA
08:00-09:00: 2.519 cfs 20:00-21:00: NO DATA
09:00-10:00: 2.747 cfs 21:00-22:00: NO DATA
10:00-11:00: 2.791 cfs 22:00-23:00: NO DATA
11:00-12:00: 3.456 cfs 23:00-24:00: NO DATA
* - - - + - - - + - - - + - - - + - - - + - - - + *
12.00 + +
I I
I I
I I
I I
10.00 + +
I I
I I
I I
I I
8.00 + +
I I
I I
I I
I # I
6.00 + # +
I # I
I # # I
I # # I
I # # I
4.00 + # # +
I # # I
I # # # I
I # # # I
I # # # # # # # I
2.00 + # # # # # # # +
I # # # # # # # I
I # # # # # # # # I
I # # # # # # # # I
I # # # # # # # # I
0.00 + # # # # # # # # +
* - - - + - - - + - - - + - - - + - - - + - - - + *
Hour Ending: 04:00 08:00 12:00 16:00 20:00 24:00
Units are 'cfs'
Combined Report
Settings Report Summary Report

730 Bubbler Module
Section 2 Programming the Module
2-3
Figure 2-2 Sampler Programming: 730 Module Screens
SELECT UNITS FOR
FLOW VOLUME:
cf gal Mgal
m3 lit
6712 SAMPLER
EXTENDED PROGRAMMING
FOR HELP AT ANY
SCREEN PRESS ? KEY
RUN
PROGRAM
VIEW REPORT
OTHER FUNCTIONS
MODULE INSERTED--
DOWNLOAD DATA NOW
OR LOSE ALL DATA!
DONE
6712 SAMPLER
STANDARD PROGRAMMING
FOR HELP AT ANY
SCREEN PRESS ? KEY
SITE DESCRIPTION
"FACTORY"
CHANGE?
YES NO
SELECT UNITS FOR
FLOW RATE:
cfs gps gpm Mgd
lps m3s m3h m3d
RUN "EXTENDED 1'
PROGRAM
VIEW REPORT
OTHER FUNCTIONS
PROGRAM NAME"
"EXTENDED 1"
CHANGE?
YES NO
See
sampler
manual.
See
sampler
manual.
Standard Extended
INTERVAL CHANGED --
DOWNLOAD DATA NOW
OR LOSE ALL DATA!
DONE
NEW MODULE SETUP --
DOWNLOAD DATA NOW
OR LOSE ALL DATA!
DONE
__.__ ft
ARE YOU SURE?
YES NO
DATA STORAGE
INTERVAL IN MINUTES
1 2 5
10 15 30
CURRENT LEVEL IS
__.__ ft
ADJUST LEVEL TO
__.__ ft
Continue with sampler programming sequence
(see sampler manual).
If applicable. This screen appears
only when a selection is changed.
Selecting NO will cause the sampler
to not accept the module setup changes.
If applicable. This screen
appears only when the interval
is changed. If NO was selected
the storage interval will not change.
PROGRAM MODULE?
YES NO
NO
YES
If applicable. This screen appears only
when the adjustment differs from the
current reading by more than 0.5 ft.
Note:
To program the module or
run a program that requires
a module, you must plug in
the module before turning
on the 6712 controller.
This screen appears only when a module has been
changed or if the module was unplugged while
the sampler was powered. If NO is selected,
the sampler responds as if there is no module.
SELECTED UNITS FOR
LENGTH:
ft m
See Figure 2-3, Module Setup.

730 Bubbler Module
Section 2 Programming the Module
2-4
Figure 2-3 Sampler Programming: 730 Module Setup Screens
MODE OF OPERATION:
FLOWMETER
LEVEL ONLY
V-NOTCH WEIR ANGLE:
120 90 60
45 30 22.5
CLEAR DATA SET!
ARE YOU SURE
YES NO
EDIT DATA POINTS
CLEAR DATA SET
SELECT NEW SET
CHANGE NAME
DATA SET __________
ABCDEFGHIJKLMNOPQRST
UVWXYZ -&"0123456789
BACKUP DONE
"DATA SET 1"
"DATA SET 2"
"DATA SET 3"
"DATA SET 4"
SAVE CHANGES?
YES NO
WEIR FLUME
DATA POINTS
EQUATION MANNING
FLOW-INSERT
V-NOTCH
RECTANGULAR
CIPOLLETTI
ENTER CREST LENGTH:
_.__ ft
(min, max)
PALMER-BOWLUS
PARSHALL
TRAPEZOIDAL
H
END CONTRACTIONS ON
RECTANGULAR WEIR?
YES NO
PALMER-BOWLUS SIZE:
4" 6" 8" 10"
12" 15" 18" 21"
24" 27" 30" 48"
PARSHALL SIZE:
1" 2" 3" 6" 9"
1' 1.5' 2' 3' 4'
5' 6' 8' 10' 12'
TRAPEZOIDAL SIZE:
2" 45 WSC
12" 45 SRCRC
LG 60 V
H FLUME SIZE:
0.5' 0.75' 1.0'
2.0' 2.5'
3.0' 4.5'
(ft, cfs)
1. (____.____)
2. (____,____)
3. (____,____)
PLEASE WAIT!
...SORTING DATA
INVALID ENTRY!
...DUPLICATE DEPTH
SLOPE= _.____
ROUGHNESS= _.___
TOP WIDTH= __.___ft
BOTTOM= __.___ft
SLOPE = _.____
ROUGHNESS= _.___
TOP WIDTH= __.___ft
BOTTOM= __.___ft
ROUND PIPE
U-CHANNEL
RECTANGULAR CHANNEL
TRAPEZOIDAL CHANNEL
SLOPE= _.____
ROUGHNESS= _.___
DIAMETER = __.___ft
Stop
Weir
Flume
Continue
Module Setup
WEIR/ORIFICE TYPE
V-NOTCH
ROUND
FLOW INSERT SIZE:
6" 8" 10" 12"
Flow-Insert
Manning

730 Bubbler Module
Section 2 Programming the Module
2-5
Figure 2-4 Sampler Programming: 730 Module Quick View Screens
SITE DESCRIPTION:
"FACTORY"
MODULE INSERTED--
DOWNLOAD DATA NOW
OR LOSE ALL DATA!
DONE
6712 SAMPLER
EXTENDED PROGRAMMING
FOR HELP AT ANY
SCREEN PRESS ? KEY
RUN
PROGRAM
VIEW REPORT
OTHER FUNCTIONS
SELECT UNITS FOR
FLOW RATE:
cfs gps gpm Mgd
lps m3s m3h m3d
SELECTED UNITS FOR
LENGTH:
ft m
UNITS SELECTED:
LENGTH: ft
UNITS SELECTED:
FLOW RATE: cfs
FLOW VOLUME:Mgal
SELECT UNITS FOR
FLOW VOLUME:
cf gal Mgal
m3 lit
PROGRAM NAME:
"EXTENDED 1"
SITE DESCRIPTION
"FACTORY
6712 SAMPLER
STANDARD PROGRAMMING
FOR HELP AT ANY
SCREEN PRESS ? KEY
RUN "EXTENDED 1"
PROGRAM
VIEW REPORT
OTHER FUNCTIONS
See
sampler
manual.
See
sampler
manual.
Standard Extended
BUBBLER MODULE
WEIR
90
V-NOTCH
CURRENT LEVEL IS
__.__ ft
ADJUST LEVEL TO
__.__ ft
CURRENT LEVEL IS
__.__ft
__ MINUTE
DATA INTERVAL
__.__ ft
ARE YOU SURE?
YES NO
DATA STORAGE
INTERVAL IN MINUTES:
1 2 5
10 15 30
Continue with the sampler programming
sequence (see sampler manual).
Note:
To program the module or
run a program that requires
a module, you must plug in
the module before turning
on the 6712 controller.
This screen appears only when a module has been
changed or if the module was unplugged while
the sampler was powered. If NO is selected,
the sampler responds as if there is no module.
See Figure 2-3, Module Setup.

730 Bubbler Module
Section 2 Programming the Module
2-6
2.4 Operation of the
Bubbler System
When measuring flow rate, the module is used with a primary
measuring device (typically a weir or a flume) or other open
channel flow arrangement where a known relationship exists
between level and flow rate (refer to Table 2-1 Flow Conversion
Types). The level measuring device is a bubbler which measures
the liquid level in the flow stream. The level reading is converted
into a properly scaled flow rate value.
The module contains microprocessor-controlled circuitry to cal-
culate level from the signals produced by the pressure trans-
ducer, and communicate with the 6712 controller.
The module’s bubbler system works as follows: A small com-
pressor pumps air into a reservoir. This air is slowly released by
an orifice into a bubble line. The other end of this tube is sub-
merged in the flow stream. Inside the module, the bubble line
also connects to one side of a differential pressure transducer. As
air is released slowly into the bubble line by the orifice, pressure
builds inside the line to force the air out of the line into the flow
stream. When there is enough pressure to counteract the hydro-
static pressure of the flow stream, a bubble will be forced from
the end of the line. The amount of pressure required to force the
bubble from the end of the line is directly dependent on the
hydrostatic pressure of the flow stream over the end of the
bubble line.
The pressure transducer inside the module senses this pressure
and converts it into an electrical signal that the module converts
into level. The 6712 controller then calculates flow rate and total
flow from the level measurement and lookup tables for the
primary device you are using.
The module produces the pressurized air supply, regulates the
rate of air to the bubbler tube, measures the pressure in the
bubbler tube, purges the air line, compensates for drift, and other
functions.
2.4.1 Purges Periodically, the module releases a high pressure, unregulated
burst of air directly into the bubble line. This is done to clear the
line and prevent any buildup of debris at the bubble line outlet.
2.4.2 Automatic Drift
Compensation
The module measures the output of the pressure transducer at
zero pressure. When the module is first turned on, and every 15
minutes after that, the processor actuates the automatic drift
compensation valve, which connects the input port of the
pressure transducer to the reference port. With the two ports
connected, it then measures the output offset.
The module stores this offset reading in memory and uses it in
level calculations. The repetition of this process causes any
pressure transducer or amplifier drift to cancel out, eliminating
the most significant cause of drift, especially when operating at
low water levels.

730 Bubbler Module
Section 2 Programming the Module
2-7
The following table contains programming information for each
of the conversion types.
2.5 Alternative Flow
Measurement Systems
Because of the characteristics of bubbler flow measurement,
there may be some installations where the bubbler method is
either unreliable or inaccurate. In these instances, it is worth-
while to consider using an alternate method of flow mea-
surement.
In addition to the 730 Module, Teledyne Isco offers three other
types of plug-and-play flow modules in the 700 Series: the 720
Submerged Probe Module, the 710 Ultrasonic Module, and the
750 Area-Velocity Module.
Information about these flow modules is available from the
factory. Call for more information or visit our Web site at
www.isco.com.
Table 2-1 Flow Conversion Types
Conversion Type Device, Formula, or Table Size or Parameters
Weir V- Notch Weir 22.5, 30, 45, 60, 90, 120 degrees
Rectangular Weir with End
Contractions
Crest length
Rectangular Weir without End
Contractions
Crest length
Cipoletti Weir Crest length
Flume Palmer-Bowlus Flume 4, 6, 8, 10, 12, 15, 18, 21, 24, 27, 30, 48 inches
Parshall Flume 1, 2, 3, 6, 9 inches
1, 1.5, 2, 3, 4, 5, 6, 8, 10, 12 feet
Trapezoidal Flume Large 60-degree V
2-inch, 45-degree WSC
12-inch, 45-degree SRCRC
“H” Flume 0.5, 0.75, 1, 1.5, 2, 2.5, 3, 4.5 feet.
Equation Q = a x Hb+c x HdQ = flow
H = head
a, b, c, & d = entered values
Data Points User-developed tables for level-to-flow
rate. Includes data points from a user
derived flow profile.
3 to 50 data points
Manning Equation Round Pipe Slope, Roughness, Diameter
U-Channel Pipe Slope, Roughness, Width
Rectangular Pipe Slope, Roughness, Width
Trapezoidal Slope, Roughness, Bottom Width, Top Width
Flow Metering Insert V-Notch 6, 8, 10, 12 inch
Round 6, 8, 10, 12 inch

730 Bubbler Module
Section 2 Programming the Module
2-8