Maintenance FlowPrep 060
4-4 May 2010
Maintenance
Checking Gas Flow
The gas flow through the flexible tubing and gas delivery tubes should be checked once a
week to ensure that there are no obstructions or leaks in the tubing. To check the flow, place
the flow control valve in the open position. Insert the gas delivery tube in a beaker of water.
Bubbles should appear. Approximately the same number of bubbles should appear in the bea-
ker of water when moved to each station.
If bubbles do not appear for a particular station, detach the suspect gas delivery tube (refer to
Attaching the Gas Delivery Tubes, page 2-6) from the flexible tubing and insert the flexible
tubing in the beaker of water. If bubbles appear, the problem is a clogged gas delivery tube. If
the tube cannot be unclogged, replace it with a new one. If bubbles do not appear, check the
valve inlet tubing (see Connecting or Replacing Valve Inlet Tubing, page 4-7).
If gas flow is not present in other stations, refer to the following table.
Table 4-2. Gas Flow Problems
Gas delivery tubes and flexible tubing may be ordered in sets of six from
Micromeritics. Refer to Ordering Information, page
5-1.
Why What To Do
Gas pressure is set too low. Increase the flow rate by turning the regulator pressure
control knob clockwise until the correct pressure gauge
reading is shown. (Refer to Table 2-2. Gas Flow Rate,
page 2-5.)
Gas bottle is empty. Replace the gas bottle.
Valve inlet tubing is
disconnected.
Check valve inlet tube connections, refer to Connecting or
Replacing Valve Inlet Tubing, page 4-7.
Flow control valve is
damaged.
Call the appropriate service personnel.
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