ISCO 750 Operating instructions

750 Area Velocity Module
Installation and Operation Guide
Part #60-9003-465
Copyright © 1996. All rights reserved, Isco, Inc.
Revision E, January, 2003

Foreword
This instruction manual is designed to help you gain a thorough understanding of the
operation of the equipment. Isco recommends that you read this manual completely
before placing the equipment in service.
Although Isco designs reliability into all equipment, there is always the possibility of a
malfunction. This manual may help in diagnosing and repairing the malfunction.
If the problem persists, call or email the Isco Customer Service Department for assis-
tance. Contact information is provided below. Simple difficulties can often be diag-
nosed 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.
Isco welcomes suggestions that would improve the information presented in this man-
ual or enhance the operation of the equipment itself.
Contact Information
Phone: [phone] (USA, Canada, Mexico)
[phone] (Outside North America)
Repair Service: [phone] (Analytical and Process
Monitoring Instruments)
[phone] (Samplers and Flow Meters)
Fax: [phone]
Email address: [email protected]
Website: www.isco.com
Return equipment to: 4700 Superior Street, Lincoln, NE 68504-1398
Other correspondence: P.O. Box 82531, Lincoln, NE 68501-2531

750 Area Velocity Module
Safety
750 Area Velocity Module
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
Liquids associated with this instrument may be classified
as carcinogenic, biohazard, flammable, or radioactive.
Should these liquids be used, itis highly recommended that
this application be accomplished in an isolated
environment designed for these types of materials in
accordance with federal, state, and local regulatory laws,
and in compliance with your company’s chemical/hygiene
plan in the event of a spill.
AVERTISSEMENT
Eviter de répandre des liquides dangereux. Les liquides qui
sont analysés dans cet instrument peuvent être
cancérigènes, hasards biologiques, inflammables, ou
radioactifs. Si vous devez utiliser tels liquides, il est très
recommandé que vous le faites à l'intérieur d'un
environnement isolé conçu pour tels liquides. Cet
environnement isolé devrait être construit selon les
règlements fédéraux, provinciaux, et locaux, aussi que le
plan de votre compagnie qui concerne l'évènement d'un
accident avec les matières hasardeuses.
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.
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.
WARNING
If this system uses flammable organic solvents, Isco
recommends that you place this system in a well-ventilated
environment, designed for these types of materials. This
environment should be constructed in accordance with
federal, state, and local regulations. It should also comply
with your organization’s plan concerning chemical and

750 Area Velocity Module
Safety
hygiene mishaps. In all cases use good laboratory
practices and standard safety procedures.
AVERTISSEMENT
Ce système peut utiliser des dissolvants organiques
inflammables. Pour réduire le péril qui peut être causé par
l'accumulation des vapeurs explosives, Isco recommande
que vous installez ce système dans un environnement
bien-aéré qui estconçu pour les matières hasardeuses. Cet
environnement devrait être construit selon les règlements
fédéraux, provinciaux, et locaux. Aussi, il devrait se
conformer au plan de votre organisation qui concerne les
mésaventures de l'hygiène ou de chimique. En tout cas,
utilisez toujours de pratiques bonnes de la laboratoire et
des procédures standardes de la sûreté.
Hazard Severity Levels This manual applies Hazard Severity Levels to the safety alerts,
These three levels are described in the sample alerts below.
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.
DANGER
DANGER – limited to the most extreme situations
to identify an imminent hazard, which if not
avoided, will result in death or serious injury.

i
750 Area Velocity Module
Table of Contents
Section 1 Introduction
1.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1.2 Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
1.3 Power Sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
1.4 Principles of Area/Velocity Flow Measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
1.4.1 Level Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
1.4.2 Velocity Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Section 2 Installation and Programming Basics
2.1 Installation Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2.1.1 Installation Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2.2 Programming Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2.2.1 Programmed Enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
2.3 Selecting a Site . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
2.4 Selecting a Flow Conversion Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
2.4.1 Flow Conversion Without a Primary Device . . . . . . . . . . . . . . . . . . . . . . . . 2-6
2.4.2 Flow Conversion With a Primary Device . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
2.5 Measurements for Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
2.6 Levels and Channel Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
2.7 Offsets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
2.8 Data Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
2.9 Minimum Depth for Velocity Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
2.10 Installation Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
2.11 Sampler Run Time Screens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
2.12 Data Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
2.12.1 Recovering Module Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
Section 3 Maintenance
3.1 Cable Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
3.2 Desiccant Reactivation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
3.3 Repair of the Module and Probe. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
3.4 How to Get Help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
3.5 Flash Memory and Software Upgrades . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
3.6 Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
List of Figures
2-1 6712 Programming: 750 Module Screens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
2-2 6712 Programming: 750 Module Setup Screens . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
2-3 6712 Programming: 750 Module Quick View Screens . . . . . . . . . . . . . . . . . . . . . . 2-5
2-4 Ideal Conditions - Uniform Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
2-5 Poor Conditions - Disturbed Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
2-6 Offset Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
2-7 Determining Minimum Depth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
2-8 Report Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14

750 Area Velocity Module
Table of Contents
ii
List of Tables
1-1 Technical Specifications for the 750 Area Velocity Module . . . . . . . . . . . . . . . . . . 1-2
1-2 Technical Specifications for the Standard AV Sensor . . . . . . . . . . . . . . . . . . . . . . 1-2
1-3 Technical Specifications for the Low Profile AV Sensor . . . . . . . . . . . . . . . . . . . . 1-3
2-1 Flow Conversion Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

1-1
750 Area Velocity Module
Section 1 Introduction
1.1 Overview The Model 750 Area Velocity Module is one of Isco’s inter-
changeable modules for the 6700 Series Samplers. The module
enhances sampler operation by providing flow-pacing and addi-
tional sampler enable conditions. The sampler also displays the
real-time level, velocity, flow rate, and total flow provided by the
module. The sampler records this data for later analysis.
The area velocity (AV) sensor detects the average velocity of a
liquid as it moves up or downstream. The sensor, equipped with
an internal pressure transducer, also measures the level of the
flow stream. Three AV sensor models are available:
• Standard range sensor – has a 25 ft (7.6 m) cable and a
pressure transducer with a 10 ft (3.05 m) level
measurement range.
• Extended range sensor – has a 50 ft (15.2 m) cable and a
pressure transducer with a 30 ft (9.14 m) level
measurement range.
• Low profile sensor – has a 25 ft (7.6 m) cable and a
pressure transducer with a 10 ft (3.05 m) level
measurement range. Its smaller size allows velocity
measurements at very low liquid depths.
The Technical Specifications for each sensor can be found in
Tables 1-2 and 1-3.
WARNING
The 750 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 any applicable guidelines, codes,
and regulations of federal, state, city, and county agencies.

750 Area Velocity Module
Section 1 Introduction
1-2
1.2 Technical
Specifications
The technical specifications for the 750 module and Standard
and Low Profile probes are listed in the following tables.
General notes:
• All weights may vary by ± 0.2 lb (0.1 kg).
• All lengths may vary by ± 0.25 inches (0.64 cm)
Table 1-1 Technical Specifications for the 750 Area Velocity Module
Weight 0.9 lbs (.4 kg)
Sensor Dimensions 4.9 ×5.7 ×2.0 inches (12.4 ×14.5 ×5.1 cm)
Material Polystyrene
Operating Temperature 0° to 140°F (-18° to 60°C)
Storage Temperature -40° to 140°F (-40° to 60°)
Enclosure Rating NEMA 4X and 6, IP67
Power 9 to 14 VDC provided by the sampler
Memory Nonvolatile ROM (Flash). Can be field updated through the sampler.
Level Resolution 0.002 ft (0.0006 m)
Velocity Resolution 0.024 ft/s (0.0073 m/s)
Velocity Accuracy -5 to +5 ft/s: ± 0.1 ft/s (-1.5 + 1.5 m/s: ± 0.03 m/s)
2% of reading) (1.5 to 6.1 m/s: ±2% of reading)
Readings Programmable through the sampler at 1, 2, 5, 10, 15, and 30 minute inter-
vals. All readings are stored in the sampler.
Table 1-2 Technical Specifications for the Standard AV Sensor
Weight Standard Range
Extended Range
2.1 lbs (.96 kg)
3.9 lbs (1.8 kg)
Sensor Dimensions Length: 6.6 inches (6.8 cm)
Width: 1.6 inches (4.1 cm)
Height: 1.2 inches (3.0 cm)
Nose Angle 35° from horizontal
Cable Length Standard Range
Extended Range
25 ft (7.6 m)
50 ft (15.2 m)
Materials Sensor: Polybutadiene-based polyurethane, stainless-steel
Cable: Polyvinyl chloride (PVC) chlorinated polyvinyl chloride (CPVC)
Operating Temperature 32° to 160°F (0° to 71°C)
Level Measurement Method Submerged pressure transducer mounted in the flow stream
Transducer Type Differential linear integrated circuit pressure transducer
Level Measurement Range
Standard Range
Extended Range
0.05 to 10.0 ft (0.015 to 3.05 m)
0.05 to 30.0 ft (0.015 to 9.14 m)