Dentsply Sirona Sim Multi Bench, Руководство по эксплуатации

Страница: 75 / 100

Dentsply Sirona
Operating Instructions Simulation Unit Sim Multi Bench 5 Care, cleaning and maintenance by the user
5.1 Basics
66 82 384 D3684
D3684.201.01.02.02 07.2019
75
5.1.3 Conduct a microbiological water test
Perform microbiological tests of the water from the simulation unit at regular
intervals and after longer periods of disuse > 1 week (see also “Media
quality”). Start the checkups in intervals of no more than two weeks and
adjust the time intervals depending on the results. In addition to running
laboratory tests, you can also use the “Total Count Tester” as a simple
means of performing this test.
To order the total count tester, please contact your customer service
center (see Section 1.2).
IMPORTANT
Shelf life of the total count tester
The maximum shelf life of the total count tester is 1 year after the date
of receipt.
The cardboard disk contains a dehydrated nutrient medium. It is
activated by the sample and serves as a culture medium for a number
of bacteria. The bacterial count provides information on the hygienic
condition of the water.
Be careful not to touch the inside of the test container or the part of the
tester to be immersed in the nutrient medium prior to incubation.
1. Allow water to run out of the 3-way syringe into the bucket for about
1 minute.
2. Use the 3-way syringe to fill cold water into the test container up to
its upper mark.
3. To neutralize the disinfecting agent of the water sample, add
approx. 1.5 g of fixing salt (sodium thiosulfate). Fixing salt can be
obtained in pharmacies or from chemical dealers.
30 s
4. Immerse the tester in the filled container for 30 seconds.
Ä
The cardboard disk with the culture medium will now absorb 1
ml of the water sample.
5. Remove the tester from the container. Shake out any excess water.
Empty the tank.
6. Place the tester in the container for incubation either for two days at
a room temperature of 20°C/68°F or for 24 hours at a temperature
of 35°C/95°F.