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«Marine Potable Water Test Kit Instruction Booklet Page | 1 9th Sept. 2013 Marine Potable Water Test Kit Instruction Booklet Page 3. Safety and ...»

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Sometimes samples with a huge bacteria load, way in excess of 200 growing colonies will result in an even white covered plate. This plate looks empty however it is fully covered with bacteria. Study the plate carefully to check for complete coverage.

Some bacteria such as Staphylococcus will produce different coloured growth on the plate (not red). These should be included in the plate count.

–  –  –

1) Fill two cells to the 10ml mark with sample water and place one cell in the left compartment of the comparator as the blank.

2) To the second cell, add one Iron tablet and crush to dissolve.

3) Place the lid on the cell and swirl until sample is mixed (do not shake vigorously).

4) Place cell in right hand side of comparator and hold the comparator up to a good light source. Rotate the disc until the closest colour match is obtained. If necessary, estimate between the nearest values.

5) Read off the result in mg/l iron.

After testing, rinse and dry cells.

–  –  –

1) Fill two cells to the 10ml mark with sample water and place one cell in the left compartment of the comparator as the blank.

2) To the second cell, add one Copper No1 tablet and crush to dissolve.

3) Place the lid on the cell and swirl until sample is mixed (do not shake vigorously).

4) Place cell in right hand side of comparator and hold the comparator up to a good light source. Rotate the disc until the closest colour match is obtained. If necessary, estimate between the nearest values.

5) Read off the result in mg/l copper After testing, rinse and dry cells.

–  –  –

IMPORTANT – WHEN USING 40mm CELLS WITH THE LOVIBOND® 2000

COMPARATOR, THE CELL SPACER/LIGHT DIFFUSER MUST BE REMOVED

AND REPLACED BY THE BLACK SPACER WITH THE TWO APERTURES.

Test Method

1) Fill a 40mm. cell to the 20ml line with sample and place in the right hand compartment of the Lovibond® 2000 comparator. Leave the left hand compartment empty.

2) Fit the disc into the Comparator and then place it in the Lovibond® 2000 comparator.

3) Hold the comparator up to a good light source and rotate the disc until the closest colour match is obtained. If necessary, estimate between the nearest values.

4) Record the value as Hazen units.

Measurement of Turbidity

–  –  –

1) Put together the two pieces of the turbidity tube.

2) Fill the tube with sample water until the cross (x) at the bottom of the tube is not visible when looking down the length of the tube.

3) Check the level of the tube with graduations on the side and read off the result.

4) Record the result a turbidly in NTU.

5) Empty and rinse the tube.

–  –  –

Introduction Enterolert* DW is designed to detect Enterococcus species in drinking water samples.

Enterolert DW utilises Ortho-Nitrophenyl-B-D-glucoside as a nutrient indicator and incorporates a specifically designed blue background colour in the formulation. When the substrate is metabolised by enterococci the sample turns from blue to green to indicate a positive detection. Any change from the original colour to green is considered a positive result. No ultraviolet light source is required. Enterolert DW detects enterococci in drinking water sample in 24 hours.

Storage Store at 2°C–25°C, away from direct light and humidity.

Presence/Absence (P/A) Procedure

1) Add contents of one pack to a 100ml sample in a sterile, transparent, non- fluorescing vessel such as one of the Thio Bags use in the coliform test.

2) Cap vessel and shake until dissolved.

3) Incubate at 41°C +/- 0.5°C for 24 hours.

4) Note results according to interpretation below.

–  –  –

Page

19. Technical Data

19. Contents

20. Switching On

21. Setting Target Temperature

22. Setting Incubation Time

22. Starting the Heaters

23. Setting the Elapsed Time

23. Power Down

23. Error Warnings

24. Notes Page

–  –  –

Voltage input: 12V DC, 2.5 Amps Temperature Range: ambient +5°C to maximum 50°C

Contents:

Portable Incubator (Order Code 777930) External 12V Universal Adaptor Set of Power Leads for Adaptor (UK, EURO and USA)

–  –  –

To turn the Incubator on, insert the regional power cable to the power socket on the side of the instrument.

When powering on the Incubator, the LCD display will show

Then the screen will show the current temperature setting:

–  –  –

ELAPSED TIME:

TARGET TEMPERATURE:

ALL INFO:

Setting Target Temperature:

To change the Target Temperature, press [UP] for 5 seconds then release the key, the screen

will change to:

Press the [UP] and [DOW N] arrow keys to change the value. The maximum value is 40°C. Press the [HEAT] key to enter the value. This value will be stored in the flash memory and be the default value when the instrument is switched on.

–  –  –

To set the Incubation Time, press [DOWN] for 5 seconds then release

the key, the screen will change to:

Press the [UP] and [DOW N] arrow keys to change the value. Press the [HEAT] key to enter the value. The screen will

then change to:

Press the [UP] and [DOW N] arrow keys to change the hours value. Press the [HEAT] key to enter the value This value will be stored in the flash memory and be the default value when the instrument is switched on.

(If this time is set to 0, then heating will continuous until the [HEAT] key is pressed again. )

Starting the Heaters:

Press the [HEAT] key to switch on the heaters and circulating fans.

On the side of the instrument, the RED LED will show that the heaters are activated. When the target temperature has been reached, the GREEN LED will come on and the RED LED will switch off. These lights will come on and off to reflect the instrument’s heating functions to keep the unit at the required temperature.

If both lights stay on, this indicates an ERROR condition and a message will be shown on the display.

–  –  –

Once the unit has reached the required temperature, press the [HEAT] key for 5 seconds and release to view the elapsed time.

Power Down:

If the incubation time has been set, then the instrument will power down automatically once this time has elapsed. The unit first switches off the heater and LED lights and after 4mins the fan stops and the unit shuts completely off.

Error Warnings:

If there is a power failure while the unit is heating, then an error will be shown when the instrument reboots. Press any key to remove this message.

If for any reason the instrument resets itself, all heating will be stopped and an error message will be shown for 3 seconds.

–  –  –

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