Metrohm 753 Suppressor Module Supplement User Manual
Page 2
Regenerating the suppressor in case of high counterpressure
If excessive counterpressure is observed in one or more of the suppressor units,
proceed as follows:
1 Disconnect suppressor from IC system
• Disconnect suppressor from separating column and detector.
2 Regenerate suppressor
• Connect the inlet capillary 25 marked "H
2
SO
4
" to the 709 IC Pump using a
6.2620.060 or 6.2744.040 coupling.
• Adjust the 709 IC Pump flow rate to 0.5 mL/min and rinse the suppressor
unit with 1 mol/L H
2
SO
4
for 5 to 10 min.
• As the pressure drops, slowly increase the 709 IC Pump flow rate to
2 mL/min. The maximum pressure must not exceed 2 MPa (20 bar).
• Switch suppressor to the next position using the
• Connect the inlet capillary 28 marked "H
2
O" to the 709 IC Pump using a
6.2620.060 or 6.2744.040 coupling.
• Adjust the 709 IC Pump flow rate to 0.5 mL/min and rinse the suppressor
unit with distilled H
2
O for 5 to 10 min.
• As the pressure drops, slowly increase the 709 IC Pump flow rate to
2 mL/min. The maximum pressure must not exceed 2 MPa (20 bar).
3 Connect suppressor to IC system
• Reconnect the suppressor to the IC system and the 753 Suppressor
Module. If the pressure problems persist, replace the suppressor rotor
(see section 4.2.7).
Supplement to «Cleaning the suppressor»
p. 30
Supplementary to the cases listed in section 4.2.6 which may necessitate cleaning of
the suppressor or replacement of connection piece 36, please also note the following
case:
• High counterpressure on the suppressor connection
tubings
Changes in standard equipment
p. 37
2 × 6.2744.010 PEEK Compression fitting (instead of 1 × 6.2744.010)
Set of 5
2 × 6.2128.180 Connecting cable (instead of 1 × 6.2128.090)
Connecting cable 762 – 752/753/754
2 × 6.2821.100 Filter unit PEEK 2 µm (new)
To avoid contamination due to abrasive particles of piston
seals
New Options
p. 38
6.2143.220 Connecting
cable
Connecting cable 732 IC Detector – 753 Suppressor Module –
754 Dialysis Unit
753 Suppressor Module, 8.753.1023
2