Metrohm 812 Valve Unit - Manual (Page 11)

2 Installation
812 Valve Unit
8
2.2 Mains connection
The 812 Valve Unit is operated with the 6.2152.000 Power supply unit
which automatically adjusts itself to the existing mains voltage
(100 … 240 V) and frequency (50 … 60 Hz).
The power supply unit is connected to the mains using one of the fol-
lowing mains cables
• 6.2122.020 with plug SEV 12 (Switzerland, … )
• 6.2122.040 with plug CEE(7), VII (Germany, … )
• 6.2133.070 with plug NEMA 5-15 (USA, … )
which are three-cored and fitted with a plug with an earthing pin.
The cable permanently mounted to the power supply unit is plugged
into connection 7 at the 812 Valve Unit (see Fig. 2). The operational
readiness is shown by the LEDs lighting up on the "FILL" or "INJECT"
keys.
2.3 Electrical connection
2.3.1 Connection at the 762 IC Interface
Always switch off 762 IC Interface and 812 Valve Unit before you
connect the two instruments.
The connection of the 812 Valve Unit at the 762 IC Interface enables the
three following functions:
• Control of valve A by the 762 IC Interface
via remote line
• Control of valve B by the 762 IC Interface
via remote line
• Automatic start of data acquisition at the
762 IC Interface by switching valve A or valve B
to the "INJECT" position
For instrument connection proceed as follows (see Fig. 3):
1 Connection for control of valve A
• Connect the plugs inscribed with "GND", "INJECT" and "FILL"
of the 6.2128.100 cable to the connections "Ground", "Fill"
and "Inject" on the terminal block 10 of the 812 Valve Unit
(see Fig. 2).
• Connect the plug inscribed with "Inject NO" of the 6.2128.100
cable to the desired remote line 1...7 "Events - Run" at the
762 IC Interface and the plug inscribed with "Inject COM" to
the same remote line "Events - COM" (see Fig. 5 Instructions
for use 762).