108
Maintenance
9.5 Distributor arm tubing replacement
The distributor arm moves over each bottle during multiple bottle sampling. Inspect the
tubing in the distributor arm on a regular basis. Replace the tubing when deteriorated or
at regular intervals.
Prerequisites:
Tubing, distributor arm, pre-cut. Make sure that the correct tube is used for the correct
distributor arm. Refer to Figure 14 Bottle and retainer configurations on page 35. Refer
also to Section 10 Parts and Accessories on page 115.
Procedure:
1. Remove the old tubing from the distributor arm.
2. Insert the new tubing into the distributor arm so that the end of the tubing extends out
of the nozzle no more than
1
/8 inch (Figure 37).
Note: Do not let the tubing extend more than
1
/8 inch past the nozzle end of the arm. If the tubing
extends too far, the tubing will get caught on the bottles and interfere with sampling.
3. To make sure that the distributor is aligned properly, run the manual distributor
diagnostic (Distributor Test on page 139).
Figure 36 Pump tubing measurement
1 To S-shaped strain relief 4 146.1 (5 ¾ in.)
2 Alignment dots 5 To sample fitting
3 295.3 (11
5
/8 in.) tubing in pump
Goodnal STP ST041 Pre Treatment (Sigma 900 MAX All Weather Refrigerated Sampler) Vendor Manual
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