Welker LS-14, Installation, Operation And Maintenance Manual

Page: 19 / 33

2.3 Preparing for Sampling
1. Open the pipeline connection.
2. As necessary, adjust the sample volume on the sampler. Refer to the Installation, Operation, and Maintenance (IOM)
Manual for the sampler for instructions on adjusting the sample volume.
3. Turn ON power to the system.
4. As necessary, manually turn ON the motor starter for the EHUC ( Figure 7 ).
5. Purge the LS-14 prior to beginning composite sampling.
Purging the LS-14
Welker recommends that the LS-14 be evacuated or purged prior to each sample batch to prevent cross-contamination
between samples.
6. Open sample container isolation valve E ( Figure 4 , Figure 5 , or Figure 6 ). Ensure that composite sample draw off valve F
is closed.
7. Begin product flow through the system.
8. Open purge/return valve D ( Figure 4 , Figure 5 , or Figure 6 ).
9. Manually or remotely actuate the sampler to purge the line of air or previous product.
10. Once all previous product has drained from the LS-14, close purge/return valve D ( Figure 4 , Figure 5 , or Figure 6 ).
Verifying Sampler Operation
11. Close sample container isolation valve E ( Figure 4 , Figure 5 , or Figure 6 ).
12. Manually actuate the sampler using the manual override on the solenoid.
13. Observe the product side pressure gauge on the LS-14 ( Figure 4 , Figure 5 , or Figure 6 ). If the sampler is operating
correctly, a spike in pressure is shown.
14. Once sampler operation has been verified, open sample container isolation valve E on the manifold block ( Figure 4 ,
Figure 5 , or Figure 6 ).
Valve E on the manifold block must remain open for the duration of composite sampling.
19
IOM-131 MODEL: LS-14 REV: F 13839 West Bellfort Street, Sugar Land, TX 77498 welker.com Service Department 281.491.2331