Friabilimeter
operating instructions
© 2016 – Pfeuffer GmbH
Revision 7
Page 27 of 48
8
Checking the device settings
The Checking the device settings chapter is only intended for specialists.
To ensure an accurate investigation, it is essential for the device settings of the FRIABILIMETER to be
checked at regular intervals.
The FRIABILIMETER is equipped with an operating hours counter as standard. Older devices can be
retrofitted by Pfeuffer GmbH.
The
device setting
procedure must be carried out every
120 operating hours
.
Use the master copy of the test log on the last page for this purpose.
Always make a note of the precise counter reading.
Inhomogeneity of the malt means it will be necessary to carry out 2-3 investigations
of each sample and take the average value.
Use a good quality homogeneous test malt (EBC test malt/Pfeuffer test malt) (approx. 80 %
friability).
Always store the test malt so the original moisture (3.5 to 5 %) is retained.
If the friability results do not match, check the following points:
Before each check of the device settings, first carry out an investigation and dispose
of this sample afterwards without logging the values.
Timer runtime
8.1
Check the runtime of the preset timer (8 minutes ±5 seconds) using a stopwatch.
Contact Pfeuffer GmbH if there is a discrepancy.
Abrasion on the pressure roll
8.2
NOTE
The pressure roll must be able to rotate freely without scraping!
Figure 23:
Checking the pressure roll diameter
Take off the front hood and the sieve drum.
Check the diameter measurement using a measuring
caliper (new = Ø 40 mm).
You can continue to use the pressure roll if there is only a
slight amount of abrasion (about Ø 39.5 mm). Use the
setscrew to compensate for the abrasion, see
chapter 8.5.
Renew the pressure roll if the diameter is less than
Ø 39.0 mm, see
chapter 9.3.
Make a note of the calibration or renewal in a test log (see master copy on last page).
