Chopin RHEO F4 User manual

20, avenue Marcellin Berthelot - Z.I. du Val de Seine
92396 Villeneuve La Garenne cedex - France
Tél. : [phone] - Fax. : [phone]
www.chopin.fr
RHEO F4
Maintenance manual
MM-RHEOF4-EN ind. 1 - 09/2014

Rheo F4
3
Maintenance manual
MM-RHEOF4-EN ind. 1 - 09/2014
IMPORTANT
The technical elements that constitute this manual (text and illustrations) are not contractual,
their only target being to bring assistance for troubleshooting and repairing the Rheo F4.
Use, duplication or disclosure of subject data, for any purpose other than relating to the
servicing or repair of this equipment, is strictly prohibited without the written authorisation of
CHOPIN Technologies.

Rheo F4
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Maintenance manual
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Table of contents
Chapter 1 Operation & Maintenance:
reminders & additional information . . . . . . . . . . . . 7
1. Operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2. Precautions linked to testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3. Control and maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Chapter 2 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
1. Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2. Failure modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3. Troubleshooting instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4. Interconnection diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Chapter 3 Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
2. Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Chapter 4 Spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
1. Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
2. Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

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Rheo F4
Chapter 1 OPERATION & MAINTENANCE:
REMINDERS & ADDITIONAL
INFORMATION

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Chapter 1 Operation & Maintenance: reminders & additional information 9
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Chapter 1. Operation & Maintenance: reminders &
additional information
This chapter summarizes the most important instructions relating to operation and maintenance of the RHEO
F4.
For detailed information, refer to Operating Manual.
In addition this chapter contains further information exclusively intended to staff authorised to manage
maintenance operations on devices.
1. Operating conditions ■ Installation
The RHEO F4 must be installed on a flat, clean and tidy bench.
The device must not be installed close to a water source (taps).
The device must not be exposed to sunlight or heat sources.
■ Electrical connection
The electrical connection must have been carried out in conformity
with standard EN 61010 - installation class: II.
❏ Characteristics of the electric supply source:
• 220/240 V~ - 50/60 Hz - 150 W
• Connection with 2 Phase + Earth / 16 A plug
• The electrical network shall incorporate, upstream from the Rheo,
a differential circuit breaker with a sensitivity 30 mA - class AC.
❏ The 2 Phase + Earth supply plug can only be connected to a
socket equipped with a protective conductor.
This is a safety measure: if plugging-in cannot be achieved, do not
try to force, and call a specialist in order to install an adapted
socket.
< 3°

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■ Environment
❏ Temperatures:
Operation: 10 °C < T + 35°C
Use: inside laboratory ambient temperature 3 °C lower than the
temperature of the protocol used.
Storage: -25 °C < T + 55°C
❏ Hygrometry:
Use: HR 85 % to 20°C
Make sure the surroundings are dry, and that there is no risk of
water projection.
❏ Pollution:
The Rheo is designed so as to operate under conditions where
there is no pollution, only a dry and not conducting pollution.
2. Precautions linked to
testing
■ Cleaning
The cleaning instructions after each test are detailed in the
Operating Manual. They should be followed scrupulously, espe-
cially on points hereunder:
❏ After the test and before conducting a new test, clean the RHEO
F4.The bowl, the perforated basket and the weights must be kept
clean at all times. After each test, clean the basket and the weights
using a damp sponge. The bowl must be cleaned using a damp
cloth to prevent water entering the pressure tap at the bottom of the
bowl. In particular, thoroughly clean the bowl rubber seal and the lid
surface.
■ Between two tests
When the Rheo F4 is not being used, in order to avoid condensa-
tion and mould, do not tightly close the tank: leave the cover laid on
the studs.
■ Handling
Take special care when handling the displacement sensor: this is
an electronic device sensitive to shocks and humidity.

Chapter 1 Operation & Maintenance: reminders & additional information 11
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Rheo F4
3. Control and
maintenance
■ Additional menus
In addition to those described in the Operating Manual, the Rheo-
fermentometer incorporates other "screens" giving access to extra
information and adjustments which may be useful while isolating a
fault or performing particular controls.
These screens are accessible when the device is connected to
computer with an access to maintenance menu (restricted code:
3213).
It is possible from synoptic screen to enter the three sensors cali-
bration menus as well as air leakage test menu. It is also possible to
enter these different menus from [Tools] tab.
■ Calibration menus (A, B and C)
These three windows allow calibrating and checking sensors val-
ues.
Calibrations will be approached in chapter 3.
A
B
C
D
Item Description
A Height calibration
B Temperature calibration
C Air leakage test (Pressure)
D Pressure calibration

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■ Air leakage test menu
This window allows testing electrovalves and carrying out an air
leakage test.
■ General recommendations
For interventions on electronic circuits, take into account the risk of
electrostatic discharges: apply appropriate precautions (antistatic
floor, grounded wrist).
For maximum efficiency of maintenance activities on the Rheo F4,
especially when more than one device are run, it is recommended
to carefully record all pieces of information relating to the device
during its life time.
This of course applies to troubleshooting and repair activities, but
also to any particular event occurring while the Rheo works, such
as:
❏ suspicious curves,
❏ calibration tests carried out (height, temperature),
❏ ordinary service interventions (replacement of soda lime, air fil-
ter,…).
■ Preventive actions
It is reminded that, in addition to normal cleaning after each test, the
operator must proceed with a certain number of periodic operations:
Operation Periodicity
❏ Soda lime replacement 50 tests
❏ Air filter replacement1
1. Requires to open the Rheofermentometer: to be carried
out preferably by entitled repair personnel.
300 tests
❏ Air leakage test 3 months
or
after a long stop
(> 1 month)
❏ Control of height measurement
❏ Control of temperature measure-
ment

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Rheo F4
Chapter 2 TROUBLESHOOTING

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Chapter 2 Troubleshooting 15
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Rheo F4
Chapter 2. Troubleshooting
The aim of this chapter is, in case a fault appears, to discover the probable origin and to isolate the failed com-
ponent or sub-assembly, if any; recovery actions from this situation are then detailed.
For any inquiry to CHOPIN Technologies Service Department, please mention the serial no of the equipment.
1. Method ■ The possible failures are listed in paragraph 2. "Failure
modes". 
These failures are classified as follows:
- A. Declared faults,
- B. Abnormal test results,
- C. Other faults.
❏ Other abnormal events may occur: the solution should then be
found by proceeding with analyses and comparisons. Simplified
interconnecting schematics are provided in §4. of this chapter, that
may help when doing troubleshooting.
Of course, in case of difficulty or doubt, CHOPIN Technologies
remains at disposal to try to solve the problem, by phone, fax or e-
mail.
Otherwise, the Rheo would have to be sent back to CHOPIN tech-
nologies for in-workshop troubleshooting and repair.
■ Before starting troubleshooting, it can be interesting to consult
the intervention logbook. Written remarks can also be useful, pro-
vided it has been recorded at the end of the last intervention.
❏ Regardless of the failure, it is recommended to carefully record
the conditions under which the failure occurred.
In case a failure occurred during test, it would be wiser, when possi-
ble, to keep track of the test results.
■ For each failure mode, the table in §3. "Troubleshooting instruc-
tions" indicates the isolation process that must be followed chrono-
logically.

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2. Failure modes A Declared faults
If the measurement seems abnormal, check on the synoptic screen
that read values are not aberrant.
A-1 HEIGHT FAULT Read height value is aberrant.
A-2 TEMPERATURE FAULT Read temperature value is aberrant.
A-3 PRESSURE FAULT Read pressure value is aberrant.
A-4 COMMUNICATION FAILURE
RHEO F4
Application communication light remains shaded.

Item Description
A Height sensor value
B Temperature sensor value
C Pressure sensor value
A
B
C

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Rheo F4
B Abnormal test results
The recording curves hereunder show the typical effects of some
internal failures occurring in the Rheo F4.
For analysis of "normal" results, i.e on a Rheo in good working
order, refer to the Operating Manual Rhéo F4.
Some internal failures may lead to apparently plausible test results.
This is the case when, for example, a very slight leak exists in the
pneumatic circuit, or when a sensor has slightly drifted.
The operator shall therefore proceed with periodic controls of some
"sensitive" functions, with the help of dedicated built-in functionali-
ties, in particular.
❏ "Air leakage test" (see in Chapter 3 instruction Operation 6-4),
❏ control of the displacement sensor (see instruction Operation 6-1)
B-1 CURVE TYPE 1
Pressure values recorded in direct and indirect cycles fall to zero.
B-2 CURVE TYPE 2
Pressure values recorded in direct cycle fall to zero.
Importante note
0
50
100
0 1h2h3h
GAS RELEASE
Presence of a fault
0
50
100
0 1h2h3h
GAS RELEASE
Presence of a fault

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B-3 CURVE TYPE 3
Pressure values recorded in direct cycle are too low.
B-4 CURVE TYPE 4
Early curve separation.
B-5 CURVE TYPE 5
Pressure values recorded in indirect cycle fall to zero, while those in
direct cycle are too high.
0
50
100
0 1h2h3h
GAS RELEASE
Presence of a fault
0
50
100
0 1h2h3h
GAS RELEASE
Presence of a fault
0
50
100
0 1h2h3h
GAS RELEASE
Presence of a fault

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B-6 CURVE TYPE 6
Pressure values recorded in direct and indirect cycles remain to
zero.
B-7 CURVE TYPE 7
Pressure values recorded in indirect cycle remain to zero.
B-8 CURVE TYPE 8
Excessive pressure values.
0
50
100
0 1h2h3h
GAS RELEASE
Presence of a fault
0
50
100
0 1h2h3h
GAS RELEASE
Presence of a fault
STOP
0
50
100
0 1h2h3h
GAS RELEASE
Presence of a fault

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B-9 CURVE TYPE 9
No height measurement recorded.
(Note: there is no fault message as for A-2, considering the meas-
urement value not being "out of range")
C Other faults
C-1 INSUFFICIENT HEATING The heating is insufficient if the set temperature of the protocol is
never met, or if the time to reach it is abnormally long.
Note: This time depends of course on the difference between
the targeted and ambient temperatures: it should normally not
exceed 1 hour.
3. Troubleshooting
instructions
Warnings:
• Any opening of the Rheo requires first the disconnec-
tion of the power cable.

• When conducting checks on an opened Rheo with the
need of the electrical power supply, apply adequate
safety measures.
0
50
100
0 1h2h3h
DOUGH DEVELOPMENT
Presence of a fault