Maintaining The Flow Cell; Installing Operating Voltage Fuses - Waters 432 Operator's Manual

2. Pry open the power connector cover with a screwdriver.
3. To change the AC power fuses, pull out each fuse holder as though opening a
drawer. Spare fuses are included in the System Startup Kit. For ordering
information, see
4. Table 2-2 on page 34
America or Europe).
5. Install the correct fuse in the holder and slide it back into place
arrow on each fuse holder points up when in the correct position.
6. Close the power connector cover. Then plug the power cord into its connector on the
rear panel of the detector.

5.1.2 Maintaining the Flow Cell

Maintenance for the 432 Detector consists of ensuring the flow cell is free of foreign
material. Foreign material in the flow cell may cause baseline drift, cycling, or noise.
Attention: To avoid damaging the column, remove it before you flush the system. Do not
STOP
reconnect the column until the eluent has returned to approximately pH 7.
To clean the cell:
1. Flush the system with ASTM Type I reagent water.
2. Flush the system with 20 mL of 6 N nitric acid (HNO
3. Flush the system again with ASTM Type I reagent water. Do not reconnect the
column until the eluent has returned to about pH 7.
Appendix B, Spare
lists the operating voltage fuses (for use in either North
Figure 5-1 Installing Operating Voltage Fuses
Parts.
).
3
(Figure 5-1). The
Maintenance 79
5