Plate Size; Address - SI Analytics TW alpha plus Operating Manual

When using the TW alpha plus Titration Sample Changer in combination with the Titrator TitroLine
7750 or 7800 the baud rate should normally be set to 4800. The list below gives the possible parameters of
the mains frequency and the COD plates:
Switch position Meaning
2 4800 Baud / 50 Hz / normal beaker glasses
6 4800 Baud / 60 Hz / normal beaker glasses
A 4800 Baud / 50 Hz / COD reaction vessels according to DIN 38 409, Part 41
E 4800 Baud / 60 Hz / COD reaction vessels according to DIN 38 409, Part 41
Considering that the position of this switch is only read in during power-up of the device, the sample
changer is to be switched off prior to any change of the switch position, and to be switched on again after
the position of the switch has been changed.
8.2

Plate size

The plate size being used is set using the "Proben/Samples" switch ( Fig. 1, item. 4) on the back panel of
the TW alpha plus Titration Sample Changer. The switch has 16 positions, of which only the first 4 are in
use. The switch positions have the following meaning:
Position
0
1
2
3
Considering that the position of this switch is only read in during power-up of the device, the sample
changer is to be switched off prior to any change of the switch position, and to be switched on again after
the position of the switch has been changed
8.3

Address

The TW alpha plus Titration Sample Changer is equipped with an addressable serial interface. To make a
clear distinction between all the connected devices, an address is preceding each command. This address
is always made up of 2 digits and stretches in the range from 00 to 15. The address set using a correspond-
ingly marked switch ( Fig. 1, item. 6). The switch position correspond to the following addresses:
Position
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
The "3" address is usually defaulted for operation with the Titrator TitroLine
Considering that the position of this switch is only read in during power-up of the device, the sample
changer is to be switched off prior to any change of the switch position, and to be switched on again after
the position of the switch has been changed.
Number of samples
12
16
24
48
Address
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
®
7000, 7750 or 7800.
29
®
7000,