LaMotte OZONE - DPD LIQUID User Manual

OVER HEAD PRO JEC TION STAGES

L

Mott

INSTRUCTION MANUAL

LaMotte Company has developed a series of units demonstrating how
reactions indicate the chemical content of a water or soil sample. Many of
these units use Overhead Projection Demonstration Stages, plastic
containers which allow the tests to be done on an overhead projector and
demonstrated to a large group. Before using an Overhead Projection Stage
read this instruction manual thoroughly.

SET TING UP THE STAGE FOR DEM ON STRA TIONS

Wipe the glass stage of the overhead projector with a dry cloth. Turn the
projector on, and place the Transparency Guide on the glass stage. Center
the Transparency Guide in the projected image by adjusting the position
on the glass stage. Place the plastic Overhead Projection Demonstration
Stage on the Transparency Guide. Line up the Overhead Projection
Demonstration Stage on the Transparency Guide by adjusting the
position on the guide.
See Figure 1.

To blank out a portion of the stage, place a piece of paper between the
Transparency Guide and the Overhead Projection Demonstration Stage.
Adjust the paper so only the desired portion of the state is visible.

PER FORM ING THE DEM ON STRA TION

Step-by-step instructions are included with all LaMotte Science
Demonstration Units. These instructions specify the amount of material
to be added to each cell, the amount of time, if any, to wait for the
reaction to proceed, and all other informaiton necessary to perform the
test. Since the instructions are easy to follow, the instructor may consider
having one or more students participate in the demonstration

SOME TIPS TO FOL LOW DUR ING THE DEM ON STRA TION:

1. Measure all test materials accurately.

2. Add the materials in the order given in the instruction.

3. Add materials to the correct test cell. If the materials are added to the

wrong test cell, the cell can be emptied using a pipet.

4. Use a plastic spatula to stir and mix materials in the test cell. When
stirring granular materials do not press against the bottom of the cell.
This can cause small, distracting scratches on the cell.

5. Wipe spatula clean before stirring a second sample.

6. Do not stare directly down into the overhead projector. View the

demonstration from an angle on the side of the projector.

7. Be careful not to spill test materials on the Transparency Guide or the
overhead projector.

CARE OF THE DEMONSTRATION STAGE

LaMotte Overhead Projection Demonstration Stages are ruggedly
constructed to provide many years of service. Attention to these simple
precautions will help prolong its usefulness.

1. Rinse demonstration stage with warm water as soon as possible after
completing the demonstration.

2. Dry with a tissue or soft cloth.

Avoid scratching the stage during rinsing and drying. Store stage in a safe
place, where it will not be scratched.

LaMOTTE COM PANY

Helping Peo ple Solve An a lyt i cal Chal lenges

P.O. Box 329 • Chestertown • Mary land • 21620 • USA

800-344-3100 • 410-778-3100 (Out side U.S.A.) • Fax [phone]

Visit us on the web at www.lamotte.com

SM

35670-1/10