Bravo G4 17 / Bravo G4 22 / Bravo G4 28
EN
45
The HELIX test device (in accordance with EN 867-5 specifications) consists of a 1.5 m-long PTFE tube, with an inside diameter of 2 mm to which a small
hermetically-sealed screw cap is fastened, able to contain an appropriate chemical indicator.
The other end of the tube is left free so that the steam can penetrate and you can assess its effectiveness.
To conduct the test (with reference to standard EN 13060:2014 + A1:2018), insert the chemical indicator, consisting of a paper strip with a special reagent
ink in the device cap (always to be used perfectly dry). Tighten the cap in such a way that seepage through the gasket is not possible.
The test device and the chemical indicators to execute the helix/b&d test cycle are not provided with the device.
For information in this regard, contact technical service department (see appendix).
Place the device roughly in the middle of the central tray. Do not insert other material in the chamber. Close the door and start the cycle.
The test cycle takes place with a succession of phases similar to those described for a normal sterilisation cycle.
At the end of the cycle, remove the test device from the chamber, open the cap and remove the indicator from its housing.
If the steam has correctly penetrated, the ink will have completely changed its original colour over the entire length of the strip; if not (insufficient
penetration), there will only be a partial colour change or even no change at all.
The same cycle can be used for the
Bowie & Dick test
at the same time by placing the test device next to the HELIX test device.
Toning usually occurs from a light colour (beige, yellow, etc.) to a dark colour (blue, violet or black).
In any event, strictly follow the instructions and any additional technical details provided by the indicator manufacturer.
10.2. VACUUM TEST CYCLE
The VACUUM TEST cycle allows testing perfect seal of the steriliser hydraulic system.
Measuring the variation of the degree of vacuum in a defined time-frame and comparing it with pre-established limit values, you can determine how good
the seal of the sterilisation chamber, tubes and the various interception devices is.
To select the VACUUM TEST cycle, select VACUUM TEST using the
arrows and confirm with OK.
The cycle must be run with the sterilisation chamber empty, and only the trays and their supports inserted.
We suggest to run this test at the beginning of each working day with chamber at ambient temperature.
A high chamber temperature affects the variation in the vacuum value measured during the test; the system is therefore programmed to prevent execution
of the test when the operating conditions are inadequate.
Close the door and start the program.
The vacuum phase starts immediately and the pressure value (bar) and the countdown from the start of the test cycle are shown on the display.
If the pressure variation exceeds the limit defined, the program is interrupted and an alarm message generated.
For the complete description of the alarms refer to appendix.
