Tw Alpha Plus Titration Sample Changer; Set-Up And Initial Operation; Unpacking The Device; Warning And Safety Information - SCHOTT TW alpha plus Mode D'emploi

1 TW alpha plus Titration Sample Changer

The TW alpha plus Titration Sample Changer enables serial titrations with automatic sample changing. It can
be used with all kinds of sampling which is done using open beaker glasses. Using a suitable titration head, it
is possible to carry out COD titrations directly in reaction containers standardized in accordance with DIN 38
409, Part 41. The TW alpha plus Titration Sample Changer is controlled by a computer or by titrators via the
RS-232-C interface. It is equipped with a built-in magnetic stirrer.

2 Set-up and initial operation

2.1 Unpacking the device

The TW alpha plus Titration Sample Changer was carefully tested and packed in the factory.
For the scope of delivery, please refer to the enclosed part list.
Please make sure to take out all parts from the packing.
The TW alpha plus Titration Sample Changer may be set up on any flat surface. Please plug the mains con-
nection cable coming with the device to the cold-device plug (Europe-type integrated plug) at the back panel.
Before switching on, please ensure that the device's operating voltage as set on the voltage-selector switch at
the bottom of the device matches the mains voltage. The possible operating voltage range is shown on the
type plate (please refer to the base plate). If the set operating voltage does not match the mains voltage,
please contact your competent service department.
The TW alpha plus Titration Sample Changer is switched on using the mains switch located at the back panel,
a green light at the front panel will indicate the "On" operating status.
Please do observe the warning and safety information.

2.2 Warning and safety information

For reasons of safety and functionality, the TW alpha plus Titration Sample Changer must only be opened by
authorized persons; this means, e.g., that work on electrical features must only be performed by qualified staff.
In the case of unauthorized intervention in the TW alpha plus Titration Sample Changer as well as in the case
of negligent or deliberate damage, the warranty will become void.
The TW alpha plus Titration Sample Changer corresponds to Protection Class I. It was manufactured and
tested according to DIN 57 411, Part 1/VDE 0411, Part 1, Protective Measures Applicable to Electronic Meas-
urement Devices, and has left the factory in an impeccable condition as concerns safety technology. In order
to maintain this condition and to ensure safe operation, the user should observe the notes and warnings con-
tained in the present operating instructions.
Prior to switching the device on it has to be ensured that the operating voltage matches the mains voltage. The
operating voltage is indicated on the type plate. The mains plug is to be plugged to a socket equipped with a
protective contact. The protective effect must not be eliminated by an extension cord without protective con-
tact. Any interruption of the protective lead inside or outside the device, or any loosening of the protective-lead
connector may render the device hazardous. Intentional interruptions are inadmissible.
It has to be ensured that no fuses other than those of the specified type and with the nominal current strength
are used. The use of mended fuses, or any short-circuiting of the fuse carrier is inadmissible.
The built-in safety features must never be put out of operation.
For safety reasons the device must not be used for any purpose other than the one described in the present
operating instructions.
The device must not be operated or stored in humid rooms.
Please observe also the operating instructions of any device to be connected.