wtw CR 2020 User manual

User's Manual
BA41102/07.93/Pla/CR2020-1
Thermo-reactor
Instrument consists of
CR 2020 / G: Reactor + Power card + Time switch
CR 2020 / A: Reactor + Connecting cable
CR 2020

Important hints for the user
BA41102/07.93/Pla/CR2020-1
1
These notes must be read before the
instrument is put into service!
This instrument has been built and tested according to the German
safety regulation for electronic test instruments, and left the factory in
a technically and operationally perfect contition.
In order to maintain this condition and guarantee safe operation the
user must observe the references and warning statements.
-Before swiching on the instrument, check that the mains voltage
selected matches the mains supply voltage.
-The proper function and operational safety of this instrument are
guaranteed only if the climatic conditions specified in the Technical
Specifications in this manual are adhered to.
-Opening of the instrument-, adjustment, maintenance, repair and
exchange of parts should only be carried out only by authorized
personnel or by WTW.
-The instrument no longer confirms to the safety regulations and a
dangerous operation can be assumed when the instrument
mhas been visually demaged,
mno longer functions,
mwas stored for a long period under unsuitable conditions,
mwas subjected to bad transport conditions.
-If it is obvious that the instrument is dangerous to persons then
take it out of service and secure against any further inadvertent
use.
In case of daubt send the instrument back to the manufacturer
"Wissenschaftlich-Technische-Werkstätten GmbH"
for repair or maintenance.

Important hints for the user
BA41102/07.93/Pla/CR2020-1
1
These notes must be read before the
instrument is put into service!
This instrument has been built and tested according to the German
safety regulation for electronic test instruments, and left the factory in
a technically and operationally perfect contition.
In order to maintain this condition and guarantee safe operation the
user must observe the references and warning statements.
-Before swiching on the instrument, check that the mains voltage
selected matches the mains supply voltage.
-The proper function and operational safety of this instrument are
guaranteed only if the climatic conditions specified in the Technical
Specifications in this manual are adhered to.
-Opening of the instrument-, adjustment, maintenance, repair and
exchange of parts should only be carried out only by authorized
personnel or by WTW.
-The instrument no longer confirms to the safety regulations and a
dangerous operation can be assumed when the instrument
mhas been visually demaged,
mno longer functions,
mwas stored for a long period under unsuitable conditions,
mwas subjected to bad transport conditions.
-If it is obvious that the instrument is dangerous to persons then
take it out of service and secure against any further inadvertent
use.
In case of daubt send the instrument back to the manufacturer
"Wissenschaftlich-Technische-Werkstätten GmbH"
for repair or maintenance.

Operating safety Technische Kundenberatung
2
BA41102/07.93/Pla/CR2020-1
Observe the analysis instructions of the
manufacturer
Only use suitable reaction vials and beakers
Wear protecting clothes
Use safety precaution (e.g. hood)
Never cool down vials with cold liquids:
Broken glass !
Bei Rückfragen wenden Sie sich bitte an den Laborfachhandel. Darüber
hinaus stehen Ihnen die technischen Kundenberater im Hause WTW bzw. die
technischen Außendienst-Mitarbeiter unserer WTW-Büros zur Verfügung.
Technische Kundenberatung:
Labormeßtechnik:
Johann Heilbock, Ralf Degner, Jürgen Winkler, Dr. Manfred Kaul, Siegfried
Forster, Fred Böttcher
Industriegeräte - Sonderanfertigungen:
Alfred Hatzelmann, Rolf Paa, Harald Würdig, Horst Zitzmann, Wolfgang
Schwarz, Werner Albrecht
Hauptwerk: WTW Wissenschaftl.-Technische Werkstätten GmbH
D-82362 Weilheim i. OB, Dr.-Karl-Slevogt-Str. 1
((0881) 183-0, Ttx 881803, Fax [phone]
WTW-Büros:
04736 Meinsberg, Andreas Pelz 65388 Schlangenbad, Thomas Schleissing
Hauptstr. 5, ([phone] Krauskopfallee 43, ((06129) 8989
06124 Halle/S., Dr. Wolfgang Erbe 67482 Venningen, Alexander Ploss
Matthias-Grünewald-Str. 12 Im Tränkweg 13
([phone] ((06323) 7855
14480 Potsdam, H.-J. Mitterlechner 71069 Sindelfingen, Helmut Jagusch
Ziolkowskistraße 16 Haigerlocher Straße 15
([phone] ([phone]
22559 Hamburg, Lorenz Lorenzen 89160 Dornstadt, Frank Busch
Nagelshof 42 b, ([phone] In den Rosenäckern 15, ((07348) 23920
30890 Barsinghausen, Kurt Suhrbier 82362 Weilheim, Georg Schöttl
Akazienweg 8, ((05105) 8718 im Hause WTW, ((0881) 183-0
53557 Bad Hönningen, Rudolf P. Weiler 84186 Münchsdorf, Korbinian Graf
Markenweg 57, ((02635) 3430 Ulmenweg 3, ((08705) 1615
58097 Hagen, Hans Duckstein 90537 Feucht, Helmut Hopp
Alsenstraße 20, ((02331) 25339 Unterer Zeidlerweg 4, ((09128) 4409
58239 Schwerte, Ullrich Duckstein
Weidenweg 7, ((02304) 67949
Österreich: 1110 Wien, WTW Meß- und Analysengeräte Gesellschaft mbH
Simmeringer Hauptstraße 113, ([phone], 741163, Fax [phone]

Technical specifications Contents list
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Test certificate: Electromagnetic compatibility EMV Important safety hints for the user ...................................1
Operating elements............................................................4
Front view........................................................................4
Rear view.........................................................................5
Operation............................................................................6
Putting into operation the CR 2020..................................6
Operation with degestion beakers....................................8
Maintenance..................................................................10
Series connection of serveral CR2010/CR2020..............11
Technical specifications..................................................12

Operating elements Technical specifications
4
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13
Front view
1 Mains supply switch
2 Heating signal
Electromagnetic
compatibility EMV
(see test certificates)
Radio interference:
EN 50081-1
Class A (FCC)
Disturbance:
EN 50082-2
Namur-recommandation
Power supply Type CR 2020 - 230 V
Mains
230 V/AC (-15 % .. +6 %) 50 .. 60 Hz
Charging rate
max 1,0 A per unit
Arrangement
up to 10 instruments
Fuses
Fuse device DIN 41571-M 1,0 A
Type CR 2020 - 115 V
Mains
115 V/AC (-15 % .. +6 %) 50 .. 60 Hz
Charging rate
max 2,0 A per unit
Arrangement
up to 5 instruments
Fuses
Fuse device DIN 41571-M 2,0 A

Technical specifications Operating elements
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Reactor type Dry reactor
Dimensions/Weight Length190 mm
Width 130 mm
Height 100 mm
Weight approx. 2.5 kg
Equipped with 3 holes for digestion beakers
Outer diameter 22.5 mm
Block temperature 100°C ± 2°C
Over temperature
cut-out 170°C ± 5°C
Heat-up time from 25°C to 100°C approx. 15 min
Housing material Noryl 100 % recyclable
Insulation type IP 20 DIN 40050
Insulation class I DIN VDE 0110
(Schutzleiteranschluß nötig)
Climate class 2 VDI/VDE 3540 or. LYE DIN 40040
Storage -25°C .. 65°C
Operation +5 C .. 40°C
relative humidity :yearly mean < 75%
30 days/year: 95%
remaining days:85%
light dew
Rear view
1 Power-supply plug
2 Power-supply socket
3 Fuse-carrier
4 Nameplate

Series connection
6
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11
Putting into operation CR 2020
mains connection:
Plug time switch into a socket
Connect basic instrument with
power card to time switch
Switching on
Master switch illuminates
Series connection of several
CR 2020 / CR 2010
-Connect basic instrument with power card to time switch
-Connect further instruments to basic instrument by connection
cable
For putting into operation and operation refer to chapter
"Operation" in the user's manual.

Operation Operation
10
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Maintenance
- No maintenance required!
-In case of fuse failure: Disconnect instrument!
-Replace melt fuses by equivalent fuses!
Data: refer to "Technical specifications" or.
nameplate at the rear side of the instrument.
Take out fuse device at the rear
side
Take out fuse
Insert new fuse
Reinstall fuse device
Heating up:
Time switch to position ΙΙ
(Continuous operation)
Master switch of instrument
illuminates
Heating indication continuously
After reaching of the rated
temperature
(approx. 15 min):
Heating indication is flashing
The CR 2020 reached the
temperature and is ready for
operation

Operation Operation
8
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Operation with digestion beakers
-Insert digestion beakers
-Possibly put on condenser
-Use safety precautions (e.g. hood)
Time switch to position ¹¹
Adjust reaction time
(refer to analysis instructions)
master switch illuminates
Await reaction time,
heater switches off automatically
Master switch extinguishes