Transcript: Vertical sampling with a double sleeve trier
Video length: 2 minutes, 58 seconds
(Canadian Grain Commission logo)
Vertical sampling with a double sleeve trier
(Exterior of Canadian Grain Commission headquarters. Sample of wheat in a metal bowl. Triers in background. Three triers of varying sizes.)
At the Canadian Grain Commission, we use a double sleeve trier for sampling bagged grain. Use the appropriate size of trier for the size of grain you’re sampling. Look in your manual for further details.
(Inspector demonstrates trier.)
Both the inner and outer tubes have openings. If you turn the inner tube, you can line these up. Be careful. You can easily catch your fingers and the edges can be sharp enough to cut you.
(Inspector inserts plugs into trier.)
Removable partitions, or plugs, must be inserted between the slots in the inner tube when taking a vertical sample. Insert these partitions before taking sample.
The contents of the entire tube represent one primary sample.
(Inspector inserts trier into open bag of grain.)
Use this method if you’re taking samples from open bags. Sampling open bags eliminates the need to puncture bags.
(Grain bags stacked horizontally on pallets. A bag of soybeans in front of pallet stacked with similar bags. Large open grain bag in front of stacks of similar bags.)
With this method, you can take a bag off the line for sampling before it’s sewn shut. Once you’ve taken a sample, you can put the bag back on the line for closing.
Text on screen: double sleeve trier with partitions long enough to reach the bottom of the grain bag
(Inspector measures trier against grain bag.)
For this method, you’ll need a double sleeve trier with partitions. Make sure it’s long enough to reach the bottom of the grain bag.
Text on screen: you can use – a clean piece of cloth or paper as long as the trier - a piece of trough to empty the trier into
(Trough and paper on work table.)
You can use a clean piece of cloth or paper as long as the trier, but today we’re using a piece of trough to empty the trier into.
Text on screen: clean container – one for your composite sample
(Metal container holding grain sample.)
You will also need a clean container for your composite sample.
(Inspector disassembles and examines trier..)
Before using the trier, make sure all openings in the inner and outer tubes are clean.
When you’re starting to sample a new lot of grain, take the trier part as shown earlier and inspect it.
Between samples in the same lot, you don’t need to disassemble the trier, but look for small seeds and particles that may be caught between the tubes.
Make sure your partitions are in place. Be careful handling the trier. If you drop it, you could damage it.
(Inspector inserts trier into open end of grain bag..)
Carefully insert the closed trier into the open end of the bag until reaches the bottom. Be careful! You don’t want to push the trier right through the bag.
Open the trier. Agitate it slightly to allow the openings to fill.
Gently close the trier until you feel some resistance. You may not be able to close it all the way.
(Inspector removes trier from bag..)
Remove the trier from the bag.
(Inspector empties sample from trier into trough and examines grain.)
Carefully empty the sample from the trier into your trough or onto your cloth or paper if you’re using one of these instead.
Check for uniformity and contamination. If your primary sample is satisfactory, add it to your composite sample for this lot of grain.
If your primary sample’s not uniform or it’s contaminated, stop sampling and speak to your manager about what to do next.
Clean up any grain that’s spilled from the bag to prevent cross-contamination.
(Inspector empties grain sample into metal container.)
You’ve finished vertically sampling a bag of grain with a double sleeve trier.
(Canadian Grain Commission logo)