1. Slide the open end of the valve assembly over

the tapered tip of the Titret so that it fits snugly.
(Figure 1).

2. Snap the tip of the Titret by hand (Figure 2).
3. With the tip of the sample pipe immersed in the

sample, squeeze the bead valve briefly to pull in
a small amount of sample. CAUTION: Do not
squeeze the bead valve unless the sample pipe
is immersed below the surface of the liquid or
the vacuum will be lost and the test ruined.
(Figure 3).

4. Rock the Titret to mix the contents. The first

addition of sample will pull in the reagent from
the sample pipe. The contents of the ampoule
will turn a GREEN color.

5. Continue to add sample water until the liquid in

the Titret turns from GREEN to a bright
ORANGE.* When the orange color appears,
the end point has been reached. Stop test, hold
the Titret with its tip pointed upward and read the
scale opposite the liquid level. Check the con-
trol and dosage chart for the appropriate prod-
uct concentrations. (Figure 5)
*Note: Immediately before the end point is
reached, the contents will turn BLUE. Make
further additions with care.

PROCEDURE FOR USING THE TITRETTOR

2

1. Fill the sample cup to the 25ml mark with your

sample.

2. Push the valve assembly (in ampoule tray) onto

the Titret ampoule tip until it fits snugly (Figure 1).

3. Gently snap the tip of the ampoule at the score

mark (Figure 2).

4. Lift the control bar and insert the Titret assembly

into the body of the Titrettor (Figure 3).

5. With the tip of the sample pipe immersed in the

sample, press the control bar firmly, but briefly,
to pull in a small amount of sample (Figure 4).
CAUTION: If the control bar is pressed when
the sample pipe is not immersed in the liquid,
then the vacuum in the Titret will be destroyed.

6. Press the control bar again briefly to allow

another small amount of sample to be drawn into
the ampoule.

7. After each addition, rock the entire assembly to

mix the contents of the ampoule. Watch for the
color change from green to orange (end point).

8. Repeat steps 6 and 7 until the end point is

reached.

9. Remove the ampoule from the Titrettor. Hold

the Titret ampoule in a vertical position and
carefully read the test result on the scale oppo-
site the liquid level (Figure 5).

Printed in U.S.A.

©2001 Ashland Inc. ®Registered trademark,

TM

Trademark of Ashland Inc.

sm

Service Mark of Ashland Inc.

1

Registered trademark,

2

Trademark of CHEMetrics, Inc.

CW-CS-1 (1/01)R7

TEST RESULTS & DOSAGE REQUIREMENTS (Control Limits in Bold Italics)

CONVERSION CHART

MAXIGARD

®

diesel engine water treatment

SCALE

MAXIGARD

DOSAGE

UNITS

as ppm prod

in liters/tonne

Initial Dosage:

16.0 liters/tonne

1.0

12,000

*

6.0

1.1

13,000

6.0

1.2

14,000

6.0

1.3

16,000

6.0

1.4

17,000

4.0

1.5

18,000

4.0

1.6

19,000 Satisfactory - no dosage

1.8

22,000 Satisfactory - no dosage

2.0

24,000 Satisfactory - no dosage

2.5

30,000 Satisfactory - no dosage

3.0

36,000 Satisfactory - no dosage

3.5

42,000

High

4.0

48,000

High

Partially drain

5.0

60,000

High

and freshen

7.0

84,000

High

system

10.0

120,000

High

High quality distilled makeup water is recommended.

*

If readings are below 12,000 (scale unit 1.0), use 10.0 ltr/tonne and retest.

If system has been partially drained and refilled, use initial dosage.

CONVERSION CHART

DEWT

®

NC diesel engine water treatment

SCALE

DEWT NC

DOSAGE

UNITS

as ppm prod

in kgs/tonne

Initial Dosage:

3.2 kgs/tonne

1.0

800

2.7

1.1

900

2.7

1.2

1,000

2.3

1.3

1,100

2.3

1.4

1,200

2.3

1.5

1,300

2.3

1.6

1,400

2.3

1.8

1,500

1.8

2.0

1,700

1.8

2.5

2,200

1.4

3.0

2,600

0.9

3.5

3,000 Satisfactory - no dosage

4.0

3,400 Satisfactory - no dosage

5.0

4,300 Satisfactory - no dosage

7.0

6,000

High

10.0

8,600

High

High quality distilled makeup water is mandatory.

CONVERSION CHART

LIQUIDEWT

TM

cooling water treatment

SCALE

LIQUIDEWT

DOSAGE

UNITS

as ppm prod

in liters/tonne

Initial Dosage:

8.0 liters/tonne

1.0

8,000

*

1.5

1.1

9,000

1.5

1.2

10,000 Satisfactory - no dosage

1.3

11,000 Satisfactory - no dosage

1.4

12,000 Satisfactory - no dosage

1.5

13,000 Satisfactory - no dosage

1.6

14,000 Satisfactory - no dosage

1.8

15,000 Satisfactory - no dosage

2.0

17,000

High

2.5

22,000

High

3.0

26,000

High

Partially drain

3.5

30,000

High

and freshen

4.0

34,000

High

system

5.0

43,000

High

7.0

60,000

High

10.0

86,000

High

High quality distilled makeup water is recommended.

*

If readings are below 8,000 (scale unit 1.0), use 5.0 ltr/tonne and retest.

If system has been partially drained and refilled, use initial dosage.

Drew Marine Division

Valve

Assembly

Score
Mark

Reference

Line

Ampoule

1

Lift control bar

3

Watch for

color change

here.

Press

control bar

Sample

4

Sample pipe

COOLING WATER TREATMENT- TESTING, CONTROL AND DOSAGE CHART

CWT TITRET

1

TEST METHOD

For use with LIQUIDEWT

TM

cooling water treatment, MAXIGARD

®

diesel engine water treatment and DEWT

®

NC diesel engine water treatment

Apparatus: CWT Titrets Test Set Order No. 0367-01-2

PROCEDURE WITHOUT USING THE TITRETTOR

2

Snap the
tip at the
score mark

2

Read
scale units
when color
changes
permanently.

5

DREW

sm

Technical

Service

ALTERNATE TEST FOR DEWT

®

NC diesel engine water treatment

Preferred method is to use the CWT Titrets

1

Apparatus: DEWT NC Test Kit Order No. 0302-01-8

Test Kit Contains:

1

Cylinder, 50ml

Order No. 0236-01-9

1

0.2g spoon

Order No. 0224-01-4

1

DEWT NC Reagent No. 1, (100 gms) Order No. 0306-01-0

1

DEWT NC Reagent No. 2, (100 gms) Order No. 0307-01-8

PROCEDURE

1.

Draw a cooling water sample from a full flowing part of the system into the graduated mixing cylinder to the
25 ml mark. (Figure 1)

2.

Add 5 level measuring spoons of DEWT NC Reagent No. 1 and mix until all of the reagent is dissolved. (Figure 2)

3.

Add 1 level measuring spoon of DEWT NC Reagent No. 2, stopper the mixing cylinder, and thoroughly mix. (Figure 3)

4.

If the sample turns purple-red and the color lasts for at least 30 seconds, the test indicates that the treatment level
is below 500 ppm. However, if the color disappears within 30 seconds, add additional Reagent No. 2, one level measuring
spoon at a time (counting spoonfuls) with thorough mixing until the purple-red color persists for over 30 seconds.

5.

To determine the concentration of DEWT NC, count the total number of measuring spoons of Reagent No. 2 added
and convert to ppm.

Calculation: ppm DEWT NC = (number of spoons-1) x 500

6.

Record results as ppm DEWT NC on the Cooling Water Treatment Onboard Graphing Log (CW-LS-3).

7.

Determine the dosage of DEWT NC treatment required per tonne of circulating water as indicated on the Dosage Requirement Chart.

DOSAGE REQUIREMENT CHART (Control Limits in Bold Italics)

DEWT NC diesel engine water treatment

Total Number of

ppm

Measuring Spoons of

of DEWT NC

Dosage Requirement per Tonne

Reagent No. 2 Used

Recorded

of Circulating Water

1

None

3.2 kg (7 lbs.)

2

500

2.7 kg (6 lbs.)

3

1000

2.3 kg (5 lbs.)

4

1500

1.8 kg (4 lbs.)

5

2000

1.4 kg (3 lbs.)

6

2500

0.9 kg (2 lbs.)

7

3000

Satisfactory - No dose required.

8

3500

Satisfactory - No dose required.

9

4000

Satisfactory - No dose required.

10

4500

Satisfactory - No dose required.

11

5000

High - No dose required.

The use of high quality, distilled makeup water is recommended as the best means
of controlling scale formation for LIQUIDEWT

TM

and MAXIGARD

®

-treated systems

and is mandatory for DEWT NC-treated systems.

REFERENCE TESTS FOR MAKEUP WATER CONTAMINANTS

Use any one of the following parameters as an indicator of makeup water contamination.

Parameter

Limit

Conductivity

500

µ

mhos maximum

Chloride

100 ppm maximum

Hardness

170 ppm maximum

*If any parameter is higher than the maximum, use better quality water.

CHLORIDE SAMPLE PRETREATMENT

Use for cooling water treated with MAXIGARD or LIQUIDEWT treatments.
Apparatus and Reagents

Drew Chloride LMP Test Kit

PCN 0373-01-9

Sample Pretreatment 50 gm

PCN 0374-02-5

(includes 0.5 gm scoop)
Filter Paper, Box of 100

PCN 0225-01-2

Funnel, Plastic

PCN 0221-01-0

Stirring Rod, Plastic, 150mm

PCN 0417-01-5

PROCEDURE

1. Add one scoop (0.5 gm) of Sample Pretreatment to approximately 70 ml of cooling water and stir well.
2. Let stand for two (2) minutes to allow precipitate to settle.
3. Filter the sample and proceed with the chloride detemrination using the Drew Chloride LMP Test Kit.