16
BÜCHI
Fat Determination
B-820/B-821
4.3
Power connections
Check that the voltage of the socket is identical to the voltage
specified on the serial plate. Only connect the unit to a plug
which is grounded. External couplings and extension cables
must be grounded (3-contact couplings, cables and connec-
tors). The ground wire must not be tampered with in any way.
Risks caused by possible internal defects are thus prevented.
Check the frequency of the power supply and adjust the unit
accordingly (see Section 5.2.3, "System configuration“).
4.4
Connecting periphery devices
The unit has three serial and one parallel interface (RS-232C).
This enables connection of a computer, a balance, an external
printer and the Autosampler B-821 to the rear of the unit.
If a balance or printer is connected, the proper balance or
printer type must be entered in the initialization menu under
system configuration or printer configuration (see Section 5.2.3,
"System configuration" or Section 5.2.2, "Printer configura-
tion“).
PC
Any IBM or IBM compatible PC may be used for data output
to a PC. The computer connection cable is available as an
accessory (cable length: 10 meters):
B-820 Computer cable
29502
Balance
The following types can be connected:
Mettler:
All AT balances, as well as AE types with
upgraded interface option 012 and hand key
or foot pedal.
Sartorius:
All analytical balances of the type MC1 as well
as balances with interface MP8-4.
A&D:
FR and HA series.
The interface parameters in B-820 are preset and cannot be
modified.
The balance parameters are as follows:
•
2400 baud
•
even parity
•
7 bit
•
1 stop bit
•
Software handshake
Figure 8: Connection of periphery devices to back of unit
4 Putting into operation
