Honeywell Minitrend QX, Руководство пользователя

Страница: 78 / 324

72 43-TV-25-30 Iss.6 GLO Aug 07 UK
• Temp Input Units - For Sterilisation, select the temperature input units.
• Start Temp - For Sterilisation, select the Start Temperature.
• Ref. Temp - For Sterilisation, select the Reference Temperature.
• Z Factor Temp - For Sterilisation, select the Z factor temperature
• Include Cooling - For Sterilisation, Include Cooling if required
• Completion Value - For Sterilisation, if cooling is not required, enter a Completion
Value. The totaliser will stop at this value.
• Numb Format - Displays the Notation of the number format, Scientific or Normal.
• • Notation - Toggle between Scientific or Normal number format.
• • Auto - Toggle Between Automatic number formatting and User Defined.
• • After Decimal - Only available when User Defined is selected. Select and
enter the number of decimal places. (up to 15 decimal places)
When the setup is complete go back to the Pen # menu and complete the pen setup.
Sterilisation
*Specification for Sterilisation. The definition Fo/Po is the sterilisation/pasteurisation time in
minutes required to destroy a stated number of organisms with a known z at temperature T.
For example, "F18/250" represents the time in minutes required to destroy a stated number
of organisms at a temperature of 250F (121.11C) with a z = 18 degrees F. F values are used
to compare the sterilizing values of different processes, however, F values cannot be com-
pared unless the z values are the same. When temperature is not specified (for example, F
= 8.6) it is understood that the temperature is 250F (121.11C); the subscript O (as in the
term Fo = 7.4) is used to indicate that the z = 18 degrees F and the temperature is 250F
(121.11C).
See “Appendix G: F sub zero Sterilisation” on page 297.
Displaying Totals
Totals can be displayed by setting up a separate pen to display the totalised value. Totals
are best displayed in a DPM screen. If you use a separate pen to display a total be aware
that if the total is stopped the pause symbol will not appear as it does for a totaliser pen.
First, select a pen you are going to use to display the total of another pen. Extra pens are
available as a Firmware option see
“Credits” on page 102 ). For this example this will be
Pen 4. To Start, Stop, Reset and View totals, see “Totals” on page 151.
In the pens menu for the totalising pen (Pen 4), select Edit Maths and enter “T” followed by
the pen number you wish to totalise eg.T3. Pen 4 is now set to totalise the value of Pen 3.
It may be necessary to set a larger scale for the totalising pen (pen 4) as the totalising value
may become larger than the pen scale of the pen being totalised (pen 3).
When the configuration is complete select the Finish button to Commit, Discard or Commit
Later. Select the Back button to return to the previous menu.
Go to the recorder’s process screen and select a screen showing DPMs. The totalising pen
(pen 4) will display the totalising value of pen 3.