Knauer Azura CT 2.1 Operating instructions

Column Thermostat CT 2.1
Service Instructions
Document no. VSM-020
HPLCHPLC

Note: For your own safety, read the instructions and observe the
warnings and safety information on the device and in the instructions.
Keep the instructions for future reference.
Phone: [phone] (9-17h, Central European Time)
Fax: [phone]
E-Mail: [e-mail]
Languages: German, English
KNAUER Wissenschaftliche Geräte GmbH
Hegauer Weg 38
14163 Berlin
Germany
Phone: [phone]
Fax: [phone]
Internet: www.knauer.net
E-Mail: [e-mail]
Article number: VSM-020
Version number: 1.0
Last update: 2020/09/22
This document contains confidential information and may not be
reproduced without written consent of KNAUER Wissenschaftliche
Geräte GmbH.
© KNAUER Wissenschaftliche Geräte GmbH 2020
All rights reserved.
AZURA® is a registered trademark of
KNAUER Wissenschaftliche Geräte GmbH.
Technical Support:
Publisher:
Version information:
The information in this document is subject
to change without prior notice.
For latest version of the instructions, check our website:
www.knauer.net/service-instructions
Legal information:

Table of contents
AZURA® CT 2.1 Service Instructions VSM-020
Table of contents
1. General .....................................................................4
1.1 About these service instructions ..........................................4
1.2 Signal words ...........................................................4
1.3 Additional typographical conventions .....................................5
1.4 Legal information .......................................................5
1.4.1 Liability limitation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4.2 Warranty conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4.3 Warranty seal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4.4 Declaration of conformity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2. Safety instructions and authorization for service technicians .......................7
2.1 Qualification of the service technician .....................................7
2.2 Service request form and decontamination report...........................8
3. Device view .................................................................9
4. Calibrating CT 2.1 manually ..................................................10
4.1 Temperature measurement .............................................10
4.2 Calibrating CT 2.1 manually via Service tool ...............................11
5. Door ......................................................................14
5.1 Door of CT 2.1 ........................................................14
5.1.1 Removing the door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.1.2 Installing the door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.1.3 Exchanging the door trim. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.2 Exchanging the door seals ..............................................18
6. Removing the fan plate ......................................................19
7. Changing the heat/cool element ............................................. 20
7.1 Removing rear plate of the device........................................20
7.2 Removing side panels of the device ......................................22
7.3 Disassembling the heat/cool element.....................................24
7.4 Installing the new heat/cool element .....................................26
7.5 Remounting the side panels of the device .................................29
7.6 Remounting the rear plate of the device ..................................31

Table of contents
AZURA® CT 2.1 Service Instructions VSM-020
8. Replacing the leak sensor ................................................... 33
8.1 Removing the leak sensor...............................................33
8.2 Installing the new leak sensor ...........................................35
9. Adjusting the leak sensor ................................................... 36
10. Firmware updates.......................................................... 37
11. Spare parts................................................................ 38

4 General
AZURA® CT 2.1 Service Instructions VSM-020
1. General
1.1 About these service instructions
This document is an addition to the user instruction of the device. It inclu-
des all work that requires the opening of the device, installation of certain
components and maintenance work.
The service instructions enable the safe and ecient operation of the
device. The service technician must have carefully read and understood
this service instructions before starting any work.
The basic prerequisite for safe operation is compliance with all safety
instructions (see chapter „Safety instructions and authorization for
service technicians“ auf Seite 6). In addition to the safety and warning
instructions in these service instructions, the local accident prevention
regulations and the national industrial safety regulations apply.
Observe the following:
All safety instructions in the service instructions
All safety instructions in the user instructions
The environmental, installation and connection specifications in the
user instructions
Only use spare parts, tools and cleaning agents recommended or
prescribed by KNAUER.
Observe the RoHS conformity for mainboards! Never perform mainte-
nance on the mainboards independently. Always replace the mainboards
and return the defective boards to KNAUER technical support, otherwise
he warranty will lapse.
1.2 Signal words
Possible dangers related to the device are distinguished in personal and
material damages.
Symbol Meaning
DANGER (red) indicates a highly hazardous situa-
tion. If not avoided, it will result in death or serious
injury.
WARNING (orange) indicates a hazardous situation.
If not avoided, it could result in death or serious
injury.
CAUTION (yellow) indicates a moderate hazardous
situation. If not avoided, it could result in minor or
moderate injury.
NOTICE (blue) is used to address issues which are
not related to physical injury.
What must be taken
into account?
Do not perform repairs
on the mainboard

General 5
AZURA® CT 2.1 Service Instructions VSM-020
1.3 Additional typographical conventions
General equal treatment: When persons are described, this document
uses the male grammar form to keep the text easy to read. The form
has a neutral sense and speaks to people of any gender in the same
way.
Note: Specific information are prefixed with the word “Note” and an
information icon.
Note: This is an example.
1.4 Legal information
1.4.1 Liability limitation
The manufacturer is not liable for the following issues:
Non-compliance of these instructions
Non-observance of necessary safety precautions
Improper use
Operation of the device by unqualified personnel (see chapter
„Qualification of the service technician“ auf Seite 6)
Use of non-approved spare parts
Technical changes by the service technician such as unauthorized
modifications
Violations of General Terms and Conditions (GTC)
1.4.2 Warranty conditions
For information on warranty please refer to our general terms and
conditions on the website: https://www.knauer.net/terms.
1.4.3 Warranty seal
The warranty seal is a security label which indicates
if any opening on instrument has occurred. Most
KNAUER products are sold with the blue seal on the
rear side to confirm that KNAUER was the last who
took care of the instrument.
An authorized service technician must order and ax
the orange warranty seal after opening the instrument
(order no. V0602) in the same place. If unauthorised
persons tamper with the device or if the seal is dam-
aged, the warranty will lapse.
1.4.4 Declaration of conformity
The declaration of conformity is enclosed as a separate document with
the product and can be obtained online:
www.knauer.net/en/Support/Declarations-of-conformity.

6 Safety instructions and authorization for service technicians
AZURA® CT 2.1 Service Instructions VSM-020
2. Safety instructions and authorization for
service technicians
The device has been developed and constructed in such a way that
hazards arising from its intended use are largely excluded. Nevertheless,
the following safety instructions must be observed in addition to the
basic safety instructions in the user instructions in order to avoid residual
hazards.
The following applies for all repairs on the device:
Electric shock
Danger of electric shock from voltage-carrying parts inside the
device. The housing serves as a protective cover against voltages
inside the device.
ÎSwitch the device o before opening the device.
ÎPull the power plug.
2.1 Qualification of the service technician
These service instructions are intended for the following professional
groups:
Task Authorized
Maintenance KNAUER service technicians
Service technicians authorized by KNAUER
who have completed a service training
Level 2
Repair KNAUER service technicians
Service technicians authorized by KNAUER
who have completed a service training
Level 3
If you do not belong to one of these professional groups, you must
under no circumstances carry out the work described in this instruction.
The service technician is qualified to handle the device if all of the
following points apply:
Fluent English to be able to use the English-language service software
and online help.
Knowledge about the properties of the used solvents and their health
risks.
Protective measures
against any dangers
Electronic defect
Electrostatic discharge can destroy the electronics.
ÎWear a protective bracelet against electrostatic discharge and ground.
Who may perform
repairs?

Safety instructions and authorization for service technicians 7
AZURA® CT 2.1 Service Instructions VSM-020
Due to technical training and experience, the service technician can
understand and carry out all the work described in the service instruc-
tions and recognize and avoid possible dangers independently.
The ability of the technician to react is not impaired by the consump-
tion of drugs, alcohol or medication.
2.2 Service request form and decontamination
report
We advise you not to repair devices which are not accompanied by the
completed document “Service request form and decontamination report”
(www.knauer.net/decontamination-report).

8Device view
AZURA® CT 2.1 Service Instructions VSM-020
3. Device view
1
Cartridge for eluent
pre-tempering (optio-
nal)
2
Door
3
Housing
4
Column holder
5
Fan
6
Temperature sensor
7
Column (not included
with the delivery)
8
Leak sensor
1
4
2
3
5
6
7
8
Fig. 1: Front view

Calibrating CT 2.1 manually 9
AZURA® CT 2.1 Service Instructions VSM-020
4. Calibrating CT 2.1 manually
Hand-held digital thermometer like SIKA MH 3750
KNAUER Service tool
4.1 Temperature measurement
Procedure Figure
1. Open the front door.
2. Insert the thermometer
probe right next to the
temperature sensor
using a column fixture
1.
3. Close the front door.
4. Turn on the column
thermostat.
Fig. 2: Inside view of the device
5. Enter a temperature
of 30°C in the status
window of the Service
tool and wait for at
least 30min to equili-
brate the temperature.
6. Note at least 3 values
over a time period of
3 min and average
these three values.
7. Repeat steps 5 and 6 at
10°C and 60°C.
Fig. 3: Enter a temperature in the
status window
After entering the averaged values of three or more measurements per
temperature the Service tool will provide the temperature values that are
needed in 4.2.
Tool
1
Result