DeLaval MM27BC Instructions for use

Preventive maintenance
Preventive maintenancePreventive maintenance
Preventive maintenance
DeLaval milk meter MM27BC
1
11
1 Task Schedule
Task ScheduleTask Schedule
Task Schedule
No 1 Replace MM27BC gasket
No 1 Replace MM27BC gasketNo 1 Replace MM27BC gasket
No 1 Replace MM27BC gasket
Replacement parts or kits:
 Art No: 91470502
Required tools:
 Wrench
No
NoNo
No Service task
Service taskService task
Service task Frequency
FrequencyFrequency
Frequency Max. interval
Max. intervalMax. interval
Max. interval Replacement parts
Replacement parts Replacement parts
Replacement parts
or kits
or kitsor kits
or kits
1 Replace MM27BC gasket 2000h 12 months  91470502
2 Replace fat sampler parts 2000h 12 months  85132601
3 Per od c check ng and h nts for sampl ng 2000h 12 months 

91548202
89634701
4 Cal brat on 2000h 12 months
5 Change d aphragm of the RS-valve 4000h 24 months 

85850901
85531630
6 Replace rubber tubes 2000h 12 months
7 Replace s l con tubes 4000h 24 months
Frequency 2000h of operat on
Max. nterval 12 months
Est mated t me: 5 m n
Serv ce type: Replace
m
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1
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6
1
2
4
1.
1.1.
1. Dismount the 27BC.
DeLaval milk meter MM27BC
DeLaval milk meter MM27BCDeLaval milk meter MM27BC
DeLaval milk meter MM27BC
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No 2 Replace fat sampler parts
No 2 Replace fat sampler partsNo 2 Replace fat sampler parts
No 2 Replace fat sampler parts
Replacement parts or kits:
 Art No: 85132601
2.
2.2.
2. Unscrew the wing nuts and remove the
bolts.
3.
3.3.
3. Lift off the meter inlet and change the gasket
mounted in the inlet.
4.
4.4.
4.
5.
5.5.
5. Place the new gasket tightly into the cavity
of the inlet tube with the correct orientation
to match retangular channel. It is important
to press the inlet tube tight against the milk
meter to compress the gasket as the screws
are reinserted.
Frequency 2000h of operat on
Max. nterval 12 months
Est mated t me: 5 m n
Serv ce type: Replace
DeLaval milk meter MM27BC
DeLaval milk meter MM27BCDeLaval milk meter MM27BC
DeLaval milk meter MM27BC
161 Preventive maintenance
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No 3 Periodic checking and hints for sam
No 3 Periodic checking and hints for samNo 3 Periodic checking and hints for sam
No 3 Periodic checking and hints for sam
pling
plingpling
pling
Required tools:


91548202 Test probe for 27BC.
89634701 25 / 27BC cleaning probe
1.
1.1.
1. The fat sampler has two O-rings and a
rubber gasket or sampler plug that must be
replaced once a year.
2.
2.2.
2. The silicon tubes and rubber bottle holder
must be replaced before they have deteri-
orated, typically 1-2 years.
Frequency 2000h of operat on
Max. nterval 12 months
Est mated t me: 30 m n
Serv ce type: Inspect
2
0
9
8
3
9
DeLaval milk meter MM27BC
DeLaval milk meter MM27BCDeLaval milk meter MM27BC
DeLaval milk meter MM27BC
161 Preventive maintenance
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The testing procedure should be carried out
with meters that are cleaned properly, i.e. after
good parlour cleaning cycle.
The purpose of the periodic checking is to
determine whether the 27BC is still func-
tioning as it did at the time for the installation
and calibration. Reference values and infor-
mation shall be noted at the time for calibration
of the 27BC milk meter. The new values
at the time for the periodic check should be
noted and compared with the initial values. See
 Chapter 3.1 "Periodic routine test form." .
If one or more out of the mentioned tests fail,
the meter should be cleaned, checked again
and replaced.
Note!
Note! Note!
Note! A test probe belongs to each installation
and should be contained on the premises, safe
from mechanical damage and dirt.
MM27BC visual inspection
MM27BC visual inspectionMM27BC visual inspection
MM27BC visual inspection
Milking parlour parameters
Milking parlour parametersMilking parlour parameters
Milking parlour parameters
Fig. 1: Test probe with optical properties that
simulates mil . The test probe fits exactly the
interior oft the MM27BC mil channel.
v
m
x
_
1
0
7
1
5
9
Fig. 2: The MM25 tool brush can be introduced
into the MM27BC to remove dirt without damag-
ing the mil meter body.
1.
1.1.
1. 

Check the milk unit from cluster to meter
for abnormalities with respect to lea-
kages, broken tubes, constrictions and so
on.
Visually inspect the 27BC measuring
channel to detect dirt, protrusions or
other abnormalities, which may effect the
performance of the milk meter.
2.
2.2.
2. A general visual test of all milking compo-
DeLaval milk meter MM27BC
DeLaval milk meter MM27BCDeLaval milk meter MM27BC
DeLaval milk meter MM27BC
161 Preventive maintenance
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nents should be carried out to verify that
there are no big changes of equipment
installation or leakages.
The five values below represent milking
point parameters that if significantly changed
may affect the 27BC bias and therefore
the results of the milk yield measurements.
If the routine test should fail, the 27BC
meters must be recalibrated with milk.





Vacuum level:
If the vacuum level has changed by more
than 2.5 Kpa since the installation test,
the routine test fails.
Claw type:
If another significantly different claw is in-
stalled, the routine test will fail.
ilk tubes:
 If the diameter of the milk tubes be-
tween milking cluster and the milk
meter has been changed, the routine
test fails.
 If the length of the milk tube between
milking cluster and the milk meter has
been changed by more than +/- 10%,
the routine test fails.
 If the milk tube between 27BC
meter and milk pipe line has been
changed in diameter or in length, the
routine test fails.
The height of the 27BC meter relative
to the cow platform:
If this distance has been changed by
more then 7 cm, the routine test fails.
Air inlet:
Increased air inlets or leakages will
cause deviations in the reading of the
27BC milk meter. If the air inlet has
significantly changed by more than 10%
compared with the installation test, for
example by air leakages along the cluster
to the 27BC milk meter, the routine
test fails. The air inlet can be observed
by visual inspection and by measuring
the air leakage using the VPR100.
DeLaval milk meter MM27BC
DeLaval milk meter MM27BCDeLaval milk meter MM27BC
DeLaval milk meter MM27BC
161 Preventive maintenance
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Check of MM27BC internal parameters
Check of MM27BC internal parametersCheck of MM27BC internal parameters
Check of MM27BC internal parameters
3.
3.3.
3. Each 27BC meter has the following
internal parameters:



Bias-Factor:
One value that is used to fix the meas-
ured 27BC bias.
Sub-Software:
This number represents the algorithm
used by the 27BC to compute
the yield. It is set when installing the
27BC and must remain constant.
(E.g. low line.)
Optical channel:
The milk channel and optical field must
stay the same as it was at the time for
calibration.
If by some malfunction the parameters
above have been changed, these para-
meters must be restored to the original
values. If not, the meters should be recali-
brated with milk.
Use VPR100 or PSION to read the para-
meters.
Check of internal parameters:
The meters Optical channel must be
checked. The milk channel characteristics
and optical field must stay the same as it
was at the time for calibration.
The test probe is simulating a milk flow.
The 27BC flow reading is compared
to the original reading obtained during the
installation test. If the obtained value is the
same, then the optical field and milk channel
characteristics have all stayed the same and
the 27BC measures as during the instal-
lation test.
For this test, a probe and the remote con-
trol unit (Psion/VPR100) are required. The
probe should be cleaned before usage and
as the probes are not perfectly identical; the
same probe should be used during the rou-
tine testing. The probe belongs to the milk-
DeLaval milk meter MM27BC
DeLaval milk meter MM27BCDeLaval milk meter MM27BC
DeLaval milk meter MM27BC
161 Preventive maintenance
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ing parlour and should be stored under good
conditions on the farm, preventing pollution
and/or mechanical damage. Such will affect
the test results.
Principle of the test:
3.1.
3.1.3.1.
3.1. Set all 27BC units to technician
mode using the remote control
(1:8:3:1, on the PSION remote or by
pressing technician mode tool on the
VPR100, see picture).
3.2.
3.2.3.2.
3.2. Wash the test probe GENTLY using
any soft soap. Dry the probe after-
wards.
3.3.
3.3.3.3.
3.3. Verify all 27BC-channels are dry
and clean.
3.4.
3.4.3.4.
3.4. Wait 10 minutes to verify all units are
perfectly stable. If on some 27BC
units an Hxxx
HxxxHxxx
Hxxx message show, wait
until it disappears. The Hxxx
HxxxHxxx
Hxxx mes-
sage implies that the 27BC inter-
nal temperature is not stable yet.
3.5.
3.5.3.5.
3.5. While the 27BC is in the tech-
nician mode and the 27BC chan-
nel is dry, the meter performs an inter-
nal self test. The self test status is
shown on the 27BC display as
Cxxx
CxxxCxxx
Cxxx (a number between 85 and 100)
every 10 to 20 seconds. As long as
the meter shows the Cxxx
CxxxCxxx
Cxxx message
the self test is ok. If no Cxxx
CxxxCxxx
Cxxx mes-
sage is seen or if SRVx
SRVxSRVx
SRVx message ap-
pears the Self Test failed.
3.6.
3.6.3.6.
3.6. If the Self Test failed the operator
should verify that the 27BC chan-
nel is dry and clean and wait for
the self test status again. If still the
27BC self test fails, the operator
can try to fix the problem by using
the Psion “RECAL” option. If still the
27BC self-test fails the 27BC
meter is defective and should be re-
placed.
2
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9
8
4
0
2
0
9
8
4
1
v
m
x
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1
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7
1
5
9
F
i
g
.
3
:
M
M
2
5
/
M
M
2
7
B
C
c
l
e
a
n
i
n
g
p
r
o
b
e
.



Ratio min = Ref inF / Current inF
Ratio max = Ref axF / Current
axF
Write the Ratio min
Ratio minRatio min
Ratio min and Ratio max
Ratio maxRatio max
Ratio max
values on the “DeLaval milk meter
27BC Periodic routine test form”.
If Ratio min
Ratio minRatio min
Ratio min and Ratio max
Ratio maxRatio max
Ratio max are be-
tween 0.98 and 1.02 the meter is
OK. Values outside the 0.98-1.02
range are too big and the meter fails
for the routine test. In case of FAIL
the 27BC channel should be
cleaned and inspected visually for
any abnormalities. Note that most of
deviation from the perfect 1.00 result
is usually because the probe test is
very sensitive. Small changes in the
probe surface and/or cleanness will
have affect on the measurement.
Failed meters
eters that failed the test should be
inspected and if necessary cleaned
internally and examined again. If a
27BC Self test fails, a RECAL
command using the Psion or VPR100
may solve the problem.
A meter that continues to fail after
F
r
e
q
u
e
n
c
y
2
0
0
0
h
o
f
o
p
e
r
a
t
o
n
M
a
x
.
n
t
e
r
v
a
l
1
2
m
o
n
t
h
s
E
s
t
m
a
t
3
0
m
n
DeLaval milk meter MM27BC
DeLaval milk meter MM27BCDeLaval milk meter MM27BC
DeLaval milk meter MM27BC
161 Preventive maintenance
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No 4 Calibration
No 4 CalibrationNo 4 Calibration
No 4 Calibration
Required tools:




25-–30 litre bucket.
Bucket cover with two nipples, milk and
vacuum.
Rubber milk tube 50-–80 cm. length, de-
pending on the distance between the
27BC outlet to the nipple on the bucket.
Electronic scale, accuracy ± 5 g. (Enter
values in grams)
Calibration routine:
Note!
Note! Note!
Note! After one wee 's use of the mil meters
or after 30 mil ed cows per mil meter, the
accuracy should be chec ed and the bias cor-
rected.
 Check the air bleeds before calibration.
3.7.
3.7.3.7.
3.7. If the Cxxx
CxxxCxxx
Cxxx values are lower than 80,
a RECAL of the 27BC can option-
ally be done, although NOT man-
datory. After RECAL the meter will
with display Cxxx
CxxxCxxx
Cxxx again but the Cxxx
CxxxCxxx
Cxxx
values will be between 98 and 100.
3.8.
3.8.3.8.
3.8. Insert the test probe into the 27BC
channel. After a few seconds the
meter should display a PASS
PASSPASS
PASS mes-
sage and two numbers. The two
values represent the flows measured
by the meter. The lower number is
the minimal flow and the higher the
maximal flow measured. The numbers
shown are 4 digits and usually be-
tween 3.000 and 4.000 kg per minute.
3.9.
3.9.3.9.
3.9. Write the minimal and maximal flows
on the “DeLaval milk meter 27BC
Periodic routine test form” under Cur
CurCur
Cur
rent MinF
rent MinFrent MinF
rent MinF and Current MaxF
Current MaxFCurrent MaxF
Current MaxF col-
umns.
3.10.
3.10.3.10.
3.10. During the routine test, the ratio be-
tween the Current MinF
Current MinFCurrent MinF
Current MinF and MaxF
MaxFMaxF
MaxF
to the Reference MinF
Reference MinFReference MinF
Reference MinF and MaxF
MaxFMaxF
MaxF
should be calculated.
additional cleaning should be re-
placed.
Reporting of the results
The results of the periodic checking
of the milk meters will be reported
to those concerned, the farmer, the
main supplier and to the national milk
recording organisation.
Cleaning tool:
Insert the tool brush into the
27BC channel to remove dirt.
e
d
t
m
e
:
S
e
r
v
c
e
t
y
p
e
:
A
d
j
u
s
t
DeLaval milk meter MM27BC
DeLaval milk meter MM27BCDeLaval milk meter MM27BC
DeLaval milk meter MM27BC
161 Preventive maintenance
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

Fixed air inlets should be used to obtain best
result.
The calibration must be carried out with real
milk (during milking).
Note!
Note! Note!
Note! Collect reference values for the Periodic
testing using test probe.
Installation of the bucket for calibration:
It is important to secure the CV is installed be-
tween the bucket and the milk line to avoid re-
maining vacuum on the milk bucket.
Remove the milk tube from the 27BC and
attach on the bucket without stressing the
conductivity cable.
Add a new milk tube between the milk meter
output and the milk bucket.
No 5 Change diaphragm of the RS
No 5 Change diaphragm of the RSNo 5 Change diaphragm of the RS
No 5 Change diaphragm of the RS valve
valvevalve
valve
Replacement parts or kits:


Art No: 85850901
Art No: 85531630
The article numbers above are kits for 1 and 10
pcs.
No 6 Replace rubber tubes
No 6 Replace rubber tubesNo 6 Replace rubber tubes
No 6 Replace rubber tubes
2
0
9
8
4
2
2
0
9
8
4
3
Frequency 4000h of operat on
Max. nterval 24 months
Est mated t me: 5 m n
Serv ce type: Replace
1.
1.1.
1. Open by turning the cover by turning slightly
counterclockwise.
2.
2.2.
2. Clean gently. Do not disconnect the cable.
3.
3.3.
3. Replace the diaphragm.
Frequency 2000h of operat on
DeLaval milk meter MM27BC
DeLaval milk meter MM27BCDeLaval milk meter MM27BC
DeLaval milk meter MM27BC
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No 7 Replace silicon tubes
No 7 Replace silicon tubesNo 7 Replace silicon tubes
No 7 Replace silicon tubes
4.
4.4.
4. Close the cover by turning it slightly clock-
wise.
Max. nterval 12 months
Est mated t me: 10 m n
Serv ce type: Replace
1.
1.1.
1.
2.
2.2.
2. Replace tubes with the service items.
Frequency 4000h of operat on
Max. nterval 24 months
Est mated t me: 10 m n
Serv ce type: Replace
DeLaval milk meter MM27BC
DeLaval milk meter MM27BCDeLaval milk meter MM27BC
DeLaval milk meter MM27BC
161 Preventive maintenance
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2
22
2 Calibration routine in VPR100
Calibration routine in VPR100Calibration routine in VPR100
Calibration routine in VPR100
After the first calibration it is important to take
reference values for the periodic checking of
the meters using the test probe. Please read
the instructions and recommendations from
ICAR on periodic checking of 27BC and
how to collect reference values using a test
probe.
2.1
2.12.1
2.1 Equipment
EquipmentEquipment
Equipment



VPR100 Software later than 08C
PC cable 92987001
Programmer cable 91677780
2.2
2.22.2
2.2 Test Procedure
Test ProcedureTest Procedure
Test Procedure
1.
1.1.
1. Find kits that include silicon tube service
items in original parts.
2.
2.2.
2. Replace tubes with the service items.
1.
1.1.
1. Verify that the vacuum level in the milking
parlour is between 42 and 44 kPa at low
line, 48 or 50 kPa at high line.
2.
2.2.
2. Check the milk tube connections from the
milking cluster through the 27BC up
to the milk line, Verify that there are no air
leaks.
3.
3.3.
3. Check the condition of the milk cluster.
DeLaval milk meter MM27BC
DeLaval milk meter MM27BCDeLaval milk meter MM27BC
DeLaval milk meter MM27BC
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Note!
Note! Note!
Note! The MM27BC is sensitive when it
comes to vacuum lea s, restrictions and bloc s
so it is of great importance that the installation
is according to guidelines.
When the installation is checked and approved
proceed with the actual calibration process:
Verify that it is clean, without cracks. Liners
and stubs should also be in a good condition
without cracks. Check also the air bleed on
the claw so that it is not blocked.
4.
4.4.
4. Check and verify that there are no error
messages on the 27BC display when it
is connected to the power.
1.
1.1.
1. Connect the IR reader to the VPR100
2
0
3
8
3
5
2.
2.2.
2. In the VPR100 go to menu for 25W/
27BC. Choose ALCO . Use the
VPR100 to read all Alcom node number in
the parlour. ark node number on a piece
of Tape on each milkmeter. ake sure no
milkmeter has the same number. If there are
units with the same number reset them to
another nr by punching in new number on
the VPR100 and sending it to the milkmeter.
3.
3.3.
3. Setup Buckets at milking point. ark each
bucket with node number so that it belongs
to that specific milking point.
4.
4.4.
4. When the milking is done push calibration
on the VPR100 and read the milking points
with buckets by pointing reader to the milk-
meter. The VPR100 will automatically
DeLaval milk meter MM27BC
DeLaval milk meter MM27BCDeLaval milk meter MM27BC
DeLaval milk meter MM27BC
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2
0
3
8
2
9
read node number and yield and store in
memory.
Note!
Note! Note!
Note!
You have to read the units before the
mil meter is reset for next cow. (Cows re-
leased).
Note!
Note! Note!
Note! Be careful with the reader of the
VPR100 – it easily pic s up information from
other mil meters. You can omit values in the
VPR by pressing “&” sign and erase the spe-
cific value.
Note!
Note! Note!
Note! If you see an Icon with bubbles on
the VPR this mean that the value is not good
enough and can not be used.
5.
5.5.
5.
2
0
3
8
3
6
6.
6.6.
6. When you have at least 4 weights per milk-
ing point written down on a paper enter
them in to the VPR100 per node nr and in
the right order. This is done by going into
calibration menu, press hash key followed
by pressing on the Alcom number that ap-
pears (default 80).Enter the 27BC Alcom
number and press return. Press on the
screen and manually enter the scale weight.
A new bias will be calculated.
7.
7.7.
7.
8.
8.8.
8. When all node numbers are done, point
the VPR100 (set in calibration mode) to the
milkmeter, the right Alcom node number ap-
pears and the calibration data. A “enter new
bias” icon appears, press the icon and wait
for the “saved” sign. If you have entered the
weights directly into the VPR100 go to next
node nr and send new bias like above.
DeLaval milk meter MM27BC
DeLaval milk meter MM27BCDeLaval milk meter MM27BC
DeLaval milk meter MM27BC
161 Preventive maintenance
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DeLaval milk meter MM27BC
DeLaval milk meter MM27BCDeLaval milk meter MM27BC
DeLaval milk meter MM27BC
161 Preventive maintenance
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DeLaval milk meter MM27BC
DeLaval milk meter MM27BCDeLaval milk meter MM27BC
DeLaval milk meter MM27BC
161 Preventive maintenance
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DeLaval milk meter MM27BC
DeLaval milk meter MM27BCDeLaval milk meter MM27BC
DeLaval milk meter MM27BC
161 Preventive maintenance
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DeLaval milk meter MM27BC
DeLaval milk meter MM27BCDeLaval milk meter MM27BC
DeLaval milk meter MM27BC
161 Preventive maintenance
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DeLaval milk meter MM27BC
DeLaval milk meter MM27BCDeLaval milk meter MM27BC
DeLaval milk meter MM27BC
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3
33
3 Accuracy check
Accuracy checkAccuracy check
Accuracy check
Note!
Note! Note!
Note! The reference values shall be recorded
at the time for the installation test just after the
DeLaval milk meter MM27BC
DeLaval milk meter MM27BCDeLaval milk meter MM27BC
DeLaval milk meter MM27BC
161 Preventive maintenance
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calibration and compared to when doing the
routine test with the test probe.
Every 12 months the 27BC should be
checked so that all internal parameters and
software has stayed the same since calibration
and installation.
Note!
Note! Note!
Note! It is very important that the same test
probe is used for reference values and for peri-
odic chec ing.
1, Use the VPR100 or Psion (use the GPARS
command) to read the meter Id (Alcom node),
the bias value and the Sub software version
(e.g. low line). Write down the parameters on
the DeLaval ilk meter 27BC Periodic rou-
tine test form, see chapter Periodic routine
test form. Note down all information regarding
installation like vacuum level, claw type, milk
tube length and diameter, height of 27BC as
well as air inlet. If any of these parameters have
been changed during the year a new calibration
of the meter might be needed - the meter might
not pass the periodic test.
2, Set the 27BC into technician mode by
pressing tools on the VPR 100 menu or on
the PSION press 8: "TECH " and then 1:
"PAR S" . Then insert the test probe in the out
let of the meter. After a few seconds the meter
should display PASS on the display and two
numbers. Those two numbers represent the
minimal flow and the maximal flow measured.
The numbers shown are 4 digits and usually
between 3,000 and 4,000 kg per minute. Write
down the minimal and maximal flow under ref-
erence inF and reference axF. Calculate the
Ratio min and Ratio max value, if it is between
0,98 and 1,02 the meter is ok.
3.1
3.13.1
3.1 Periodic routine test form.
Periodic routine test form.Periodic routine test form.
Periodic routine test form.
DeLaval milk meter MM27BC Periodic routine test form
DeLaval milk meter MM27BC Periodic routine test formDeLaval milk meter MM27BC Periodic routine test form
DeLaval milk meter MM27BC Periodic routine test form
Reference date:
Test date:
Test probe serial number:
DeLaval milk meter MM27BC
DeLaval milk meter MM27BCDeLaval milk meter MM27BC
DeLaval milk meter MM27BC
161 Preventive maintenance
20 (22)
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Printout from Memoviewer 11/6/2012.