Bio-Rad Econo Gradient Pump Kits - Manual (Page 37)

7.0 CLEANING AND MAINTENANCE
The Econo Gradient Pump requires very little maintenance to assure
reliable operation. The procedures outlined below will insure
maximum pump life:
• Check tubing regularly for signs of cracking and wear. If any
exist, replace the tubing.
• For optimal tubing life, use a slow to medium pump speed. To
increase throughput, increase tubing size to obtain the desired
output.
• When not in use, tubing should be removed from the pump to
prevent deformation of the tubing. Remove the platen and relax
the tubing by unhooking one end of the tubing from the tubing
bracket.
• To prevent the formation of precipitates around the pump head
and on the membrane key panel, promptly remove any spills.
Clean with deionized water.
• If an auxiliary valve or the Gradient Mixer is used, rinse it with
deionized water after each use. Store them in 20% EtOH for long-
term storage. Do not expose the valves to pressures greater than
20psi.
• If using the pump at 4°C, leave the pump on (not necessarily
running) to mitigate condensation within the pump.
7.1 Fuse Replacement and Voltage Conversion
To replace a fuse, see Figure 7-1 and follow these steps:
1. Disconnect the power cord from the unit.
2. Remove the fuse drawer with a small-blade screwdriver or similar
tool.
3. Pull the fuse holder out of the fuse drawer and replace the fuses
with ones having the correct current rating. Use 0.40 A slow-blow
fuses for 100/120 V operation; 0.20 A slow-blow fuses for
220/240 V operation. The 0.20A fuses are packaged in a plastic
bag and taped to the exterior of the pump.
Maintenance
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