Delta NANOTRACE DF-745 Instruction Manual download pdf (Page 75)

Service DF-745 71

9 Service

9.1 Return Material Authorization number

If an analyzer has to be returned to the factory, the shipper will have to obtain a Return Material

Authorization number from Delta F by calling the Service Line at (781) 935-5808 or sending a

written request via their Service Fax Line at (781) 932-0053. See the Shipping section for more

details.

9.2 Maintenance

9.2.1 Storage Conditions

If the analyzer is to be stored for extended periods of time, be sure that the temperature of storage

location does not exceed 50° C (122° F). Storage in direct sunlight can cause temperatures to

exceed the recommended limits even though ambient temperatures may be below the maximum

temperature.

Store the analyzer with the electrolyte removed from the sensor.

9.2.2 Moisture Cell Maintenance

None required.

9.2.3 Vacuum Pump Maintenance

The vacuum pump, if equipped, requires periodic maintenance in order to maintain proper

pressure and individual installations will ultimately determine the appropriate maintenance

interval. A good working pump will pull down to 120 torr or less, but when pump performance

degrades to the point that proper pressure cannot be attained, a significant improvement in

performance can often be achieved by simple cleaning of the cylinder and piston assembly. A

rebuild kit is available from Delta F to return the pump to original specifications. See the list on

page 73 for cleaning fluid and rebuild kit part numbers.

9.2.3.1 Cleaning Vacuum Pump Piston and Cylinder Assembly

1. Disconnect power and vent all lines

2. Remove head bolts, head, gasket and valve plate assembly (note orientation of head)

3. Remove cylinder and shims.

4. Clean residue from walls using a soft cloth and non-petroleum, non-oil based solvent.

5. Replace cylinder including all shims. Be sure to orient the shims exactly the same as they

were removed.

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Delta NANOTRACE DF-745 Instruction Manual Page 75