PASCO WA-9897 User manual

Instruction Sheet
012-10034B
Ripple Tank
WA-9897
800-772-8700 www.pasco.com
®
Introduction
The PASCO model WA-9897 Ripple Tank is designed to be used
with the PASCO model WA-9896 Ripple Generator and Light
Source. The tank is 42.5 cm by 42.5 cm by 2.5 cm with four foam
“beaches” and a 0.3 cm thick glass plate. The viewing area is 33
cm by 33 cm. The tank has an easy-to-use drain pipe consisting
of a piece of flexible vinyl plastic tubing and a tube clamp. The
tank is supported by three detachable legs with adjustable feet
and comes with a reflector and projection screen.
The ripple tank also comes with the following: ruler, pipette, sur-
factant bottle, storage box, barriers (5 pieces), refractors (3
pieces), a beaker, and a rod for supporting a light source. The list
of included parts is given below.
Ripple Tank
Reflector
Storage
Box
Beaker, 1000
mL
Projection
Screen
Rod
Barriers
Ruler
Refractors
Surfactant
Bottle
Pipette, 5 mL
Leg

®
Model No. WA-9897 Items
2
Items
Descriptions
The box in which the Ripple Tank is stored has two layers. The
screen assembly, plastic storage box, rod, and beaker are in the top
layer, and the ruler, legs, and Ripple Tank assembly are in the bot-
tom layer. The top layer has areas for storing the WA-9896 Ripple
Generator and Light Source, including the power adapter and cord.
Screen Assembly
The screen assembly is a reflector and a projection screen joined at
one edge by a strip of flexible tape. Note: Remove any protective
coating from the reflector and the screen before using. The reflector is alumi-
nized acrylic. The screen is translucent plastic.
There are three holes along the top edge of the reflector and two strips of Vel-
cro® ‘loop’ material along the top edge of the projection screen.
Description Part Number
1. Ruler 699-081
2. Pipette, 5 mL 699-154
3. Storage box 740-177
4. Bottle, 1 ounce, (for Tergitol surfactant1)650-072
5. Long barrier (2 pieces) 648-09718
6. Mini barrier 648-09717
7. Short barrier 648-09719
8. Curved reflector 648-09820
9. Concave refractor 648-09720
10. Convex refractor 648-09721
11. Trapezoidal refractor 648-09714
12. Rod for Light Source 648-09713
13. Leg, Ripple Tank 648-09705
14. Beaker, 1000 mL 699-197
15. Screen assembly 003-09736
16. Ripple Tank assembly 003-09703
1Note: The Tergitol L-62 surfactant is part number 699-023.
Screen
assembly
Ripple Tank
assembly
Rod
Plastic
storage
box
Legs and
ruler
Holes
Velcro®
‘loop’
material
Reflector
Projection
screen

®
Model No. WA-9897 Setup
3
Ripple Tank Assembly
The ripple tank assembly has an impact resistant plastic frame.
Below the front edge of the frame is a strip of Velcro® ‘hook’
material that will hold the ‘loop’ material on the top edge of the
projector screen. Below the back edge of the frame are three
pegs that fit into the holes in the top edge of the reflector. The
threaded hole on the top side of the back edge is for the rod that
can support the Light Source that is included in the WA-9896
Ripple Generator and Light Source. When the ripple tank is in
use, the four foam ‘beaches’ dampen the waves that would oth-
erwise reflect and disturb the primary wave and interference
patterns. The foam beaches are replaceable. (A variety of
replacement parts are available in the WA-9898 Ripple Tank
Replacement Set.)
The ripple tank’s drain pipe is a piece of flexible vinyl tubing
attached below the drain hole at the back corner of the tank. Squeeze the sides ot the tube clamp on the
drain pipe to tighten the clamp on the tubing. Pull downward on the lip of the tube clamp to loosen the
clamp.
Setup
To setup the ripple tank, screw the legs into the threaded holes on the underside near the two front corners
of the tank, and under the midpoint of the back edge. Place the ripple tank on a smooth, level surface.
To attach the reflector and projection screen to the tank, unfold the screen assembly and put the reflector
between the two front legs. Angle the reflector upwards and guide the top edge so that the three holes fit
over the pegs that are at the back edge of the tank. Next, raise the projection screen to the vertical position
and attach its Velcro® ‘loop’ material to the strip of ‘hook’ material under the front edge of the tank.
Apply Surfactant Before putting water into the ripple tank for the first time, prepare the foam
beaches, barriers, and refractors with a drop of surfactant (a nonionic wetting agent). The surfactant helps to
avoid problems with the surface tension of the water. Put a single drop of surfactant from the small plastic
bottle onto the end of one finger, and lightly rub your finger along the foam beaches. Use a single drop of
surfactant to very sparingly coat the large flat surfaces of the three refractors and the front surfaces of the
straight and curved barriers. Note that you only need to apply surfactant to the beaches, barriers, and refrac-
tors before using the ripple tank for the first time, or if the equipment has been unused for a long time.
Level the Ripple Tank When you are ready to add water to the tank, squeeze the sides of the tube
clamp to close the clamp. Use the beaker to add a small amount of water to the middle of the tank so that the
water forms a circle about 10 cm in diameter. Adjust the feet on the legs until the circle of water stays in the
middle of the tank and does not move toward any side. (An alternate method for leveling the tank is to add
about 800 milliliters of water to the tank. Measure the water depth at three of the four corners of the tank and
adjust the feet on the legs until the depths are the same.)
Dampen the Foam Beaches To reduce the problem of surface tension, let the foam beaches soak
up some of the water. After putting about 800 milliliters of water in the tank, press down on the foam and
then release the pressure so that water enters the pores of the foam rubber.
Cleanup
Before emptying the tank, remove the projection screen and reflector. Fold the screen assembly so the pro-
jection screen protects the reflector.
Drain hole Threaded hole
Pegs
Strip of Velcro® ‘hook’
material (not shown)
Squeeze
to tighten
Pull to
loosen

®
Model No. WA-9897 Technical Support
4
To empty the tank, place a container under the drain pipe and open the tube clamp. When the water stops
flowing, raise the corner of the tank opposite to the drain hole so the rest of the water will drain out. Leave
the tube clamp in the open position.
Be careful to get as much water out of the foam beaches as possible. Press with your thumbs against the
foam to squeeze the water out. Next, press a rolled-up towel onto the foam beaches to soak up any remaining
water.
Dry the glass plate completely so that water spots won’t form on the plate. To clean the glass plate or the
reflector, use a soft cloth moistened with water and then dry with a clean towel. Do not use soap or chemical
cleaners.
Technical Support
For assistance with any PASCO product, contact PASCO at:
Limited Warranty
For a description of the product warranty, see the PASCO catalog.
Copyright
The PASCO scientific 012-10034B Ripple Tank Instruction Sheet is copyrighted with all rights reserved. Permission is
granted to non-profit educational institutions for reproduction of any part of this manual, providing the reproductions are
used only in their laboratories and classrooms, and are not sold for profit. Reproduction under any other circumstances,
without the written consent of PASCO scientific, is prohibited.
Trademarks
PASCO and PASCO scientific are trademarks or registered trademarks of PASCO scientific, in the United States and/or in
other countries. All other brands, products, or service names are or may be trademarks or service marks of, and are used
to identify, products or services of, their respective owners. For more information visit www.pasco.com/legal.
Address: PASCO scientific
10101 Foothills Blvd.
Roseville, CA 95747-7100
Phone: [phone] (worldwide)
800-772-8700 (U.S.)
Fax: [phone]
Web: www.pasco.com
Email: [email protected]

Product Name: TERGITOL(TM) L-62 Issue Date: 01/26/2006
Print Date: 15 Aug 2007
* Indicates a Trademark
Page 1 of 7
The Dow Chemical Company encourages and expects you to read and understand the entire (M)SDS,
as there is important information throughout the document. We expect you to follow the precautions
identified in this document unless your use conditions would necessitate other appropriate methods or
actions.
1. Product and Company Identification
Product Name
TERGITOL(TM) L-62
COMPANY IDENTIFICATION
The Dow Chemical Company
2030 Willard H. Dow Center
Midland, MI 48674
USA
Customer Information Number: 800-258-2436
EMERGENCY TELEPHONE NUMBER
24-Hour Emergency Contact: 989-636-4400
Local Emergency Contact: 989-636-4400
2. Hazards Identification
Emergency Overview
Color: Clear
Physical State: Liquid
Odor: Mild
Hazards of product:
No significant immediate hazards for emergency response are known.
OSHA Hazard Communication Standard
This product is a "Hazardous Chemical" as defined by the OSHA Hazard Communication Standard, 29
CFR 1910.1200.
Potential Health Effects
Eye Contact: May cause slight temporary eye irritation. Corneal injury is unlikely.
Skin Contact: Prolonged exposure not likely to cause significant skin irritation. Material may be
handled at elevated temperatures; contact with heated material may cause thermal burns.
Skin Absorption: Prolonged skin contact is unlikely to result in absorption of harmful amounts.
Inhalation: At room temperature, exposure to vapor is minimal due to low volatility; single exposure is
not likely to be hazardous. Vapor from heated material or mist may cause respiratory irritation.
Material Safety Data Sheet
The Dow Chemical Company

Product Name: TERGITOL(TM) L-62 Issue Date: 01/26/2006
Page 2 of 7
Ingestion: Low toxicity if swallowed. Small amounts swallowed incidentally as a result of normal
handling operations are not likely to cause injury; however, swallowing larger amounts may cause
injury.
Effects of Repeated Exposure: For similar material(s): In animals, effects have been reported on the
following organs after exposure to aerosols: Lung.
Component CAS # Amount
Polyalkylene glycol 9003-11-6 <= 99.0 %
4. First-aid measures
Eye Contact: Flush eyes thoroughly with water for several minutes. Remove contact lenses after the
initial 1-2 minutes and continue flushing for several additional minutes. If effects occur, consult a
physician, preferably an ophthalmologist.
Skin Contact: Wash skin with plenty of water.
Inhalation: Move person to fresh air; if effects occur, consult a physician.
Ingestion: If swallowed, seek medical attention. Do not induce vomiting unless directed to do so by
medical personnel.
Notes to Physician: If burn is present, treat as any thermal burn, after decontamination. No specific
antidote. Treatment of exposure should be directed at the control of symptoms and the clinical
condition of the patient.
5. Fire Fighting Measures
Extinguishing Media: Water fog or fine spray. Dry chemical fire extinguishers. Carbon dioxide fire
extinguishers. Foam. Do not use direct water stream. May spread fire. Alcohol resistant foams (ATC
type) are preferred. General purpose synthetic foams (including AFFF) or protein foams may function,
but will be less effective.
Fire Fighting Procedures: Keep people away. Isolate fire and deny unnecessary entry. Use water
spray to cool fire exposed containers and fire affected zone until fire is out and danger of reignition has
passed. Fight fire from protected location or safe distance. Consider the use of unmanned hose
holders or monitor nozzles. Immediately withdraw all personnel from the area in case of rising sound
from venting safety device or discoloration of the container. Do not use direct water stream. May
spread fire. Move container from fire area if this is possible without hazard. Burning liquids may be
moved by flushing with water to protect personnel and minimize property damage.
Special Protective Equipment for Firefighters: Wear positive-pressure self-contained breathing
apparatus (SCBA) and protective fire fighting clothing (includes fire fighting helmet, coat, trousers,
boots, and gloves). If protective equipment is not available or not used, fight fire from a protected
location or safe distance.
Unusual Fire and Explosion Hazards: Container may rupture from gas generation in a fire situation.
Violent steam generation or eruption may occur upon application of direct water stream to hot liquids.
Hazardous Combustion Products: During a fire, smoke may contain the original material in addition
to combustion products of varying composition which may be toxic and/or irritating. Combustion
products may include and are not limited to: Carbon monoxide. Carbon dioxide.
6. Accidental Release Measures
Steps to be Taken if Material is Released or Spilled: Contain spilled material if possible. Absorb
with materials such as: Sand. Dirt. Collect in suitable and properly labeled containers. See Section
13, Disposal Considerations, for additional information.
3. Composition Information

Product Name: TERGITOL(TM) L-62 Issue Date: 01/26/2006
Page 3 of 7
Personal Precautions: Keep unnecessary and unprotected personnel from entering the area. Spilled
material may cause a slipping hazard. Use appropriate safety equipment. For additional information,
refer to Section 8, Exposure Controls and Personal Protection.
Environmental Precautions: Prevent from entering into soil, ditches, sewers, waterways and/or
groundwater. See Section 12, Ecological Information.
7. Handling and Storage
Handling
General Handling: Spills of these organic materials on hot fibrous insulations may lead to lowering of
the autoignition temperatures possibly resulting in spontaneous combustion. Product on surfaces can
cause slippery conditions. Product shipped/handled hot can cause thermal burns. Product handled
hot may require additional ventilation or local exhaust.
Storage
Keep container tightly closed when not in use. Store in the following material(s): Stainless steel.
Polypropylene. Polyethylene-lined container. Teflon. Glass-lined container. Aluminum. Plasite 3066
lined container. Plasite 3070 lined container. 316 stainless steel.
Shelf life: Use within Storage temperature:
24 Months 15 - 35 °C
8. Exposure Controls / Personal Protection
Exposure Limits
None established
Personal Protection
Eye/Face Protection: Use safety glasses.
Skin Protection: No precautions other than clean body-covering clothing should be needed. When
handling hot material, protect skin from thermal burns. Selection of specific items will depend on the
operation.
Hand protection: Use gloves with insulation for thermal protection, when needed.
Respiratory Protection: For most conditions, no respiratory protection should be needed; however, if
material is heated or sprayed, use an approved air-purifying respirator. The following should be
effective types of air-purifying respirators: Organic vapor cartridge with a particulate pre-filter.
Ingestion: Use good personal hygiene. Do not consume or store food in the work area. Wash hands
before smoking or eating.
Engineering Controls
Ventilation: Good general ventilation should be sufficient for most conditions. Local exhaust
ventilation may be necessary for some operations.
9. Physical and Chemical Properties
Physical State Liquid
Color Clear
Odor Mild
Flash Point - Closed Cup 216 °C (421 °F) ASTM D93
Flammable Limits In Air Lower: No test data available
Upper: No test data available
Autoignition Temperature No test data available
Vapor Pressure No test data available
Boiling Point (760 mmHg) Not applicable decomposes before boiling.

Product Name: TERGITOL(TM) L-62 Issue Date: 01/26/2006
Page 4 of 7
Vapor Density (air = 1) >1 Literature
Specific Gravity (H2O = 1) 1.011 Calculated
Freezing Point See Pour Point
Melting Point not applicable to liquids
Solubility in Water (by
weight) readily soluble
pH 6.5 Calculated (3% aq.sol)
Molecular Weight 2500 g/mol Calculated
Kinematic Viscosity 231 cSt @ 38 °C Calculated
Cloud point 30 °C Calculated (1% aqueous solution)
Pour point -2 °C (28 °F) Calculated
10. Stability and Reactivity
Stability/Instability
Thermally stable at typical use temperatures.
Conditions to Avoid: Exposure to elevated temperatures can cause product to decompose.
Generation of gas during decomposition can cause pressure in closed systems.
Incompatible Materials: Avoid contact with: Strong acids. Strong bases. Strong oxidizers.
Hazardous Polymerization
Will not occur.
Thermal Decomposition
Decomposition products depend upon temperature, air supply and the presence of other materials.
Decomposition products can include and are not limited to: Aldehydes. Alcohols. Ethers.
Hydrocarbons. Ketones. Organic acids. Polymer fragments.
11. Toxicological Information
Acute Toxicity
Ingestion
Typical for this family of materials. Estimated LD50, Rat > 4,000 mg/kg
Skin Absorption
Typical for this family of materials. LD50, Rabbit > 10,000 mg/kg
Repeated Dose Toxicity
For similar material(s): In animals, effects have been reported on the following organs after exposure
to aerosols: Lung.
12. Ecological Information
CHEMICAL FATE
Persistence and Degradability
For this family of materials: Material is readily biodegradable. Passes OECD test(s) for ready
biodegradability.
OECD Biodegradation Tests:
Biodegradation Exposure Time Method
> 60 % 28 d OECD 301F Test

Product Name: TERGITOL(TM) L-62 Issue Date: 01/26/2006
Page 5 of 7
ECOTOXICITY
For this family of materials: Material is practically non-toxic to aquatic organisms on an acute basis
(LC50/EC50 >100 mg/L in the most sensitive species tested).
13. Disposal Considerations
DO NOT DUMP INTO ANY SEWERS, ON THE GROUND, OR INTO ANY BODY OF WATER. All
disposal practices must be in compliance with all Federal, State/Provincial and local laws and
regulations. Regulations may vary in different locations. Waste characterizations and compliance with
applicable laws are the responsibility solely of the waste generator. DOW HAS NO CONTROL OVER
THE MANAGEMENT PRACTICES OR MANUFACTURING PROCESSES OF PARTIES HANDLING
OR USING THIS MATERIAL. THE INFORMATION PRESENTED HERE PERTAINS ONLY TO THE
PRODUCT AS SHIPPED IN ITS INTENDED CONDITION AS DESCRIBED IN MSDS SECTION:
Composition Information. FOR UNUSED & UNCONTAMINATED PRODUCT, the preferred options
include sending to a licensed, permitted: Recycler. Reclaimer. Incinerator or other thermal
destruction device. As a service to its customers, Dow can provide names of information resources to
help identify waste management companies and other facilities which recycle, reprocess or manage
chemicals or plastics, and that manage used drums. Telephone Dow's Customer Information Group at
1-800-258-2436 or 1-989-832-1556 (U.S.), or 1-800-331-6451 (Canada) for further details.
14. Transport Information
DOT Non-Bulk
NOT REGULATED
DOT Bulk
NOT REGULATED
IMDG
NOT REGULATED
ICAO/IATA
NOT REGULATED
This information is not intended to convey all specific regulatory or operational
requirements/information relating to this product. Additional transportation system information can be
obtained through an authorized sales or customer service representative. It is the responsibility of the
transporting organization to follow all applicable laws, regulations and rules relating to the
transportation of the material.
15. Regulatory Information
OSHA Hazard Communication Standard
This product is a "Hazardous Chemical" as defined by the OSHA Hazard Communication Standard, 29
CFR 1910.1200.
Superfund Amendments and Reauthorization Act of 1986 Title III (Emergency Planning
and Community Right-to-Know Act of 1986) Sections 311 and 312
Immediate (Acute) Health Hazard No
Delayed (Chronic) Health Hazard Yes
Fire Hazard No
Reactive Hazard No
Sudden Release of Pressure Hazard No

Product Name: TERGITOL(TM) L-62 Issue Date: 01/26/2006
Page 6 of 7
Superfund Amendments and Reauthorization Act of 1986 Title III (Emergency Planning and
Community Right-to-Know Act of 1986) Section 313
To the best of our knowledge, this product does not contain chemicals at levels which require reporting
under this statute.
Pennsylvania (Worker and Community Right-To-Know Act): Pennsylvania Hazardous
Substances List and/or Pennsylvania Environmental Hazardous Substance List:
To the best of our knowledge, this product does not contain chemicals at levels which require reporting
under this statute.
Pennsylvania (Worker and Community Right-To-Know Act): Pennsylvania Special Hazardous
Substances List:
To the best of our knowledge, this product does not contain chemicals at levels which require reporting
under this statute.
Comprehensive Environmental Response, Compensation, and Liability Act of 1980 (CERCLA)
Section 103
This product contains the following substances which are subject to CERCLA Section 103 reporting
requirements and which are listed in 40 CFR 302.4.
Component CAS # Amount
Ethylene oxide 75-21-8 <= 10.0 PPM
Propylene oxide 75-56-9 <= 10.0 PPM
1,4-Dioxane 123-91-1 <= 5.0 PPM
Acetaldehyde 75-07-0 <= 5.0 PPM
Formaldehyde 50-00-0 <= 5.0 PPM
California Proposition 65 (Safe Drinking Water and Toxic Enforcement Act of 1986)
WARNING: This product contains a chemical(s) known to the State of California to cause cancer.
Component CAS # Amount
Ethylene oxide 75-21-8 <= 10.0 PPM
Propylene oxide 75-56-9 <= 10.0 PPM
1,4-Dioxane 123-91-1 <= 5.0 PPM
Acetaldehyde 75-07-0 <= 5.0 PPM
Formaldehyde 50-00-0 <= 5.0 PPM
California Proposition 65 (Safe Drinking Water and Toxic Enforcement Act of 1986)
WARNING: This product contains a chemical(s) known to the State of California to cause birth defects
or other reproductive harm.
Component CAS # Amount
Ethylene oxide 75-21-8 <= 10.0 PPM
US. Toxic Substances Control Act
All components of this product are on the TSCA Inventory or are exempt from TSCA Inventory
requirements under 40 CFR 720.30
CEPA - Domestic Substances List (DSL)
All substances contained in this product are listed on the Canadian Domestic Substances List (DSL) or
are not required to be listed.
European Inventory of Existing Commercial Chemical Substances (EINECS)
The components of this product are on the EINECS inventory or are exempt from inventory
requirements.
16. Other Information
Product Literature

Product Name: TERGITOL(TM) L-62 Issue Date: 01/26/2006
Page 7 of 7
Additional information on this and other Dow products may be obtained by visiting our web page at
www.dow.com. Additional information on this product may be obtained by calling your Dow Chemical
Company sales or customer service contact. Ask for a product brochure.
Hazard Rating System
NFPA Health Fire Reactivity
1 1 1
Recommended Uses and Restrictions
Multi-purpose surfactant.
Revision
Identification Number: 80110 / 1001 / Issue Date 01/26/2006 / Version: 2.1
Most recent revision(s) are noted by the bold, double bars in left-hand margin throughout this
document.
Legend
N/A Not available
W/W Weight/Weight
OEL Occupational Exposure Limit
STEL Short Term Exposure Limit
TWA Time Weighted Average
ACGIH American Conference of Governmental Industrial Hygienists, Inc.
DOW IHG Dow Industrial Hygiene Guideline
WEEL Workplace Environmental Exposure Level
HAZ_DES Hazard Designation
The Dow Chemical Company urges each customer or recipient of this (M)SDS to study it carefully and
consult appropriate expertise, as necessary or appropriate, to become aware of and understand the
data contained in this (M)SDS and any hazards associated with the product. The information herein is
provided in good faith and believed to be accurate as of the effective date shown above. However, no
warranty, express or implied, is given. Regulatory requirements are subject to change and may differ
between various locations. It is the buyer's/user's responsibility to ensure that its activities comply with
all federal, state, provincial or local laws. The information presented here pertains only to the product
as shipped. Since conditions for use of the product are not under the control of the manufacturer, it is
the buyer's/user's duty to determine the conditions necessary for the safe use of this product. Due to
the proliferation of sources for information such as manufacturer-specific (M)SDSs, we are not and
cannot be responsible for (M)SDSs obtained from any source other than ourselves. If you have
obtained an (M)SDS from another source or if you are not sure that the (M)SDS you have is current,
please contact us for the most current version.