BEHR CF 2 Plus 2 User manual

217201
User's Manual
CF 2+2 / CF 6
Device for Determining Crude Fiber Content
According to EN ISO 6865
Semi-Automatic with User Guidance
Firmware version 1.01

2© behr Labor-Technik GmbH
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Please read these operating instructions carefully before starting up your new
behrotest®device for determining Crude Fiber Content!
The operating manual gives clear and simple instructions for use of the apparatus.
In the interest of eliminating risk please observe the safety instructions given in this manual!
They are marked with a symbol.
Additional useful and important information on the functioning of the apparatus is marked
by a stripe in the margin.
We wish you every success in your work with the
behrotest® device for determining Crude Fiber Content!

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behrotest®CF 2+2 / CF 6
Safety advice
Danger of electric shock! Make sure that no liquids get into the cable connections or the
inside of the equipment.
There are no components inside the appliance which you need to operate. Repairs to
electrical equipment must be carried out only by trained specialists. Unplug the mains
plug before opening the appliance.
Glass can break and cause injury! In working with glass components, observe all appro-
priate safety precautions.
Be careful in working with corrosive substances! Follow the safety guidance in the perti-
nent Safety Data Sheets.
Caution: acetone and petroleum ether are inflammable! Perform all procedures working
with organic solvents in the optional defattening unit DG 2+2 / DG 6, not in the CF 2+2 /
CF 6. Empty the waste containers regularly; define whether the contents are to be recy-
cled or to be disposed of.
Appropriate Use
The CF 2+2 / CF 6 is only meant for use with diluted aqueos acids and bases,
not for use with organic solvents (danger of explosion) or with concentrated acids and bases.
Organic solvents or concentrated acids or bases could damage parts of the device.

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Contents
Safety advice...............................................................................................................................................3
Appropriate Use..........................................................................................................................................3
Scope of supply..........................................................................................................................................5
Parts list 5
Setting Up And Connecting ......................................................................................................................6
Some Routine Procedures With This Device...........................................................................................8
The Defattening Unit (optional) 10
Programming the CF 2+2 / CF 6 ............................................................................................................... 11
Adapting the CF 2+2 / CF6 to your requirements...........................................................................................12
Choosing the language 12
Configuring the level sensor 12
Setting the time 12
Cooling Water Source Setting 13
Setting the Date 13
Working with the CF2+2 / CF6 ................................................................................................................14
Preparing the Crucibles 14
Weighing the Samples In 14
Acid Digestion 16
Alkaline Digestion 19
Drying and Weighing 20
Incinerating and Weighing 20
Blank 20
Evaluation 20
Aborting Digestion 20
Manual Entry.............................................................................................................................................21
Modifying the Program 22
Maintenance and Care .............................................................................................................................25
Spare Parts and Accessories .................................................................................................................28
Consumables 28
Technical Data ..........................................................................................................................................29
Support .....................................................................................................................................................30

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behrotest®CF 2+2 / CF 6
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Scope of supply
Please check the contents of the pack for com-
pleteness and freedom from damage immediately
upon receipt.
Claims resulting from damage during transportation
which is externally apparent must be lodged imme-
diately with the carrier (i.e., the post/mail service,
the railway administration, the freight organization,
etc.) - see the label on the packaging.
In case of damage which is not apparent from out-
side („concealed transportation damage“), please
contact the behr after-sales service immediately
upon discovery of the damage. The same applies
in the case of any other complaints.
Address:
behr Labor-Technik GmbH
Spangerstrasse 8
D-40599 Düsseldorf, Germany
Telephone: [phone]
Telefax: ([phone]
E-mail: [e-mail].
Please check the contents against the following list.
Parts list

Infrared-heated crude-fibre digestion unit
CF 2+2 / CF 6 for 4 or 6 samples, respectively
Heat-protection shield for CF 2+2 / CF 6
Crucible rack for docking to the CF 2+2 / CF 6
Transport gripper to simultaneously take the 4
or 6 crucibles out or insert them
4 or 6 filter crucibles, respectively,
packed separately

4 or 6 sieves to be inserted in the suction
nozzles

3 jugs,marked for water, acid, and base

2 heating plates
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Funnel with prolonged outlet for filling in the
reagents
Hose set with the cooling-water hoses and the
waste-water hose.
In addition, you need a waste-water container
and, in case you are using the optional
defattening unit, collecting containers for the
acetone and petroleum ether.
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Setting Up And Connecting
Glass can break and cause injury!
In working with glass components,
observe all appropriate safety precau-
tions.
Place the infrared crude-fibre unit CF 2+2 / CF 6
on a flat level surface.
Hang the crucible rack on the hooks in front of
the crude-fibre unit.
Connect the waste-water hose of the crude-
fibre unit to the waste-water container
(optional).
Make sure the power switches of the devices
and, the case being, of the heating plates are
off.
Connect the infrared crude-fibre unit and, the
case being, the defattening unit to mains.
Inserting the sieves
The suction nozzles have stainless-steel sieves
laid in, to protect the pump from coarse particles in
case a frit should break. On delivery, these sieves
come packed separately.
Using tweezers, lay a sieve in each suction
nozzle.
If, later on, you want to change a sieve, take it
out of the nozzle with a pin.
Inserting the crucibles in the multi-crucible
snapper
On delivery, the filter crucibles and the heat shield
come packed separately; insert them in the device
now:
Insert the crucibles in the crucible rack.
Push the multi-crucible snapper on the
crucibles.
Inserting the crucibles in the device
Release the lock lever by pressing it down a
bit and pulling the locking grip towards yourself
with your thumb.
Let the lever come up to the end position;
release the locking grip as soon as the lever is
out of the lock position.
Insert the crucibles in the device.
Push the lock lever down until it engages.Now
the crucibles are locked.
Later on, you won't ever grasp the crucibles one by
one but insert them in the device using the multi-
crucible snapper, and get them out or transfer them
to or from the optional defattening unit.
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Insert the crucibles
in the crucible rack ...
... and press the multi-crucible
snapper on the crucibles

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behrotest®CF 2+2 / CF 6
Inlet hose has
screw connections
on both ends
Outlet hose is a
thin polyamide hose;
push into the socket
as far as it will go
Inlet
Tap Water
(screw
connection)
Outlet
Tap Water
(quick push-in
connection)
Inserting the heat shield
Hang the heat shield on the hooks on the front
of the device.
Cooling-water connections
The cooling-water inlet hose has 3/4" screw con-
nectors on both ends.
Screw the cooling-water inlet hose to the
socket marked "Inlet Tap Water".
Connect the inlet hose to a water tap.
Push the cooling-water outlet hose (black poly-
amide hose) into the socket marked "Outlet Tap
Water" as far as it will go and lay it to a sink.
Open the water tap.
The CF 2+2 / CF 6 crude-fibre unit can only
be operated if cooling water is on. If you try
operating it without cooling water, an error
message willl appear, and the software cannot
be started.
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Taking Out and Inserting the Crucibles
Crude-Fibre determination with the CF 2+2 / CF 6
is performed with the same filter crucibles for
digestion, filtration and incineration. The crucibles
are locked under the condensers of the digestion
device. In order to insert the crucibles, to take them
out or to transfer them from the digestion device
to the defattening device and back, there's the
multi-crucible snapper. It makes you sure not to mix
the samples up. (On delivery, the crucibles came
packed separately.)
If you unlock the lock lever without
gripping the crucibles before with the
multi-crucible snapper, the crucibles
will fall out of the device and break.
So always grip the crucibles with the
multi-crucible snapper, then unlock
the lock lever and take the crucibles
out simultaneously. Doing it this way,
you always have the crucibles in the
proper order and are sure not to mix
the samples up.
During a digestion, the crucibles are concealed
behind the heat shield. In order to take the
crucibles out after digestion and filtration, you need
first to take the heat shield off.
Grasping the heat shield with the handle, lift it
up a bit so the two "keyholes" will pass over the
pins that are holding it.
Take the heat shield off and lay it aside.
Now push the multi-crucible snapper on the
crucibles that are locked in the device. You will
need to press quite firmly until all four or six
spring clips have properly locked on the cruci-
bles.
Now you can unlock the crucibles:
Release the lock lever by pressing it down a
bit and pulling the locking grip towards yourself
with your thumb.
Let the lever come up to the end position;
release the locking grip as soon as the lever is
out of the lock position.
With the multi-crucible snapper, take the cru-
cibles out of the device and insert them in the
crucible rack in front of the device.
In order to insert the crucibles in the device again,
proceed in inverse direction. In the same way insert
the crucibles in the optional defattening unit DG 2+2
/ DG 6 and back out.
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Some Routine Procedures With This Device

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behrotest®CF 2+2 / CF 6
Filtrating
The samples in the digestion vessels will be differ-
ently easy to filtrate, even if they are of the same
material - maybe the sample weights are slightly
different, or one sample has got more filter aid
added than the other.
If you try to filter all these samples simultaneously,
the fastest one will already be sucking air while
others, may be, have got clogged. So don't do that;
filter them one by one. This is the way it is arranged
in the software.
When the program asks you, turn the valve
into "Vacuum" position, confirm by pressing the
control knob and let the pump drain the content
of the vessel. Turn the valve back to "Closed"
before opening the next one.
Blowing the frits free
On cooking with acid and then with base, part of
the sample material is dissolved. Sometimes the
remaining part will consist of very fine particles that
will clog the frit on filtrating. In order to get the frits
free again, the washing procedures of the program
have a part where air is blown through the frit.
In the software, an overall aeration time is given
that is meant for all samples together. The display
will always show the remaining aeration time.
Turn the valves, one after the other, cautiously
into "Pressure" position and have air blown
through the frit.
If the frits had not been clogged in the first
place, blowing might cause part of the sample
to be splashed up into the condensers from
where it needs to be rinsed back in the
next steps. To prevent this, turn the valves
cautiously.
After a few seconds, the frit should be free again.
Turn the valve back to "Closed" before blowing
the next frit free.
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The Defattening Unit (optional)
The determination procedure of crude fibre has
some steps operating with volatile organic solvents.
Before starting the digestion itself, the sample is
treated with petroleum ether to remove fat. After the
acid digestion step it can be necessary - depend-
ing of the nature of the sample - to remove another
fraction of fat; in this case the wet sample must be
treated with acetone first to remove water. And at
the very end, the sample is washed with acetone to
make drying easier.
These procedure steps must not be carried out in
the CF 2+2 / CF 6 digestion unit. For these steps
there is the optional defattening unit DG 2+2 / DG 6.
The defattening unit has no condensers and no IR
radiator or any other kind of heating, but, instead,
it has two separate suction pumps so you can col-
lect acetone and petroleum ether separately and
decide if and how they are to be recycled.
The procedure of locking and unlocking the cruci-
bles is the same for the optional defattening unit as
for the IR digestion unit.