Metrohm 828 IC Dual Suppressor - Manual (Page 34)

3 Operation
828 IC Dual Suppressor/ 8.828.1003 Instructions for Use
26
3.6 Routine operation
3.6.1 Manual operation
Start sequence
1 Installation
Install the 828 IC Dual Suppressor as described in Section 2.
• The remote connection from the suppressor to the 762 IC
Interface (6.2128.180 Cable, Figure 5) or to the 761 Compact
IC (6.2143.200 Cable, Figure 7) are not necessary for manual
operation.
• The IC Dual Suppressor must be switched to manual opera-
tion, remote switch 15 = OFF.
2 Switch on suppressor
• Switch on the instrument with mains switch 16.
The vacuum pump starts up and the LED "Vacuum" 5 will light
up green as soon as the set working pressure is reached.
Wait until the LED "Vacuum" 5 lights up green before continuing with
step 3.
3 Switch on pump
• Switch on the high pressure pump.
After a short time the pump will build up pressure and, when
the value set for the pressure sensor has been reached (see
page 22), current is applied to the suppressor cell.
The LED "Current" 4 lights up green. This process takes about
1 minute, but this time may vary depending on the set flow rate
and the backpressure of the system. When the cell voltage lies
within the given range then LED "Voltage" 3, followed by LED
"Ready" 1, will light up green.
4 Equilibrate
• Wait 20-30 minutes until the 828 IC Dual Suppressor is
equilibrated.
The suppressor is fully equilibrated when the background con-
ductivity remains constant and a stable baseline is obtained.
When you change the eluent you should first rinse the separation
column without connecting the 828 IC Dual Suppressor. Pump the
eluent through the system for about 5 min.