What do you think 1 second changes is going to gain you? The tolerance for delays is greater than that per nfpa. Ignition time also varies the delay time. The general rule is 1/32" removal per sec of time.They only give you one washer with the UDDT. One of the tool side takes 8 seconds off the delay, the other side 4. Use the washer and you get 6 and 2 seconds removed, respectively. The provided washer is 1/8 inch thick.
Now, I personally think Aerotech is doing us a disservice. Their DMS engines come with 14, 16 or 18 second delays and you can only remove in two seconds increments. Why? How many sims have I run that call for an odd-seconds delay? Many! So, I have brass sheet I use for shims and zipperless designs. I just cut out circular shims of the right thickness with a tin snips the size of the washer and can do 1 second increments from 14 down to 6 seconds. Easy Peasey.
Note: It makes no sense to use two 1/8 inch washers on the 4 second size of the tool. You would remove no delay material and it would leave you at the max delay of the engine. On the 8 second size you would remove 4 seconds, which you can do with the 4 second side and no washers. The key is being able to get 1 second increment....
P.S. Don't mess with the set screw unless you determine the setting is off and the delay you expected is wrong. These are set at the factory. Loosen that set screw and let the drill bit slip and you won't be calibrated anymore and you'll be....screwed!
They only give you one washer with the UDDT. One of the tool side takes 8 seconds off the delay, the other side 4. Use the washer and you get 6 and 2 seconds removed, respectively. The provided washer is 1/8 inch thick.
Now, I personally think Aerotech is doing us a disservice. Their DMS engines come with 14, 16 or 18 second delays and you can only remove in two seconds increments. Why? How many sims have I run that call for an odd-seconds delay? Many! So, I have brass sheet I use for shims and zipperless designs. I just cut out circular shims of the right thickness with a tin snips the size of the washer and can do 1 second increments from 14 down to 6 seconds. Easy Peasey.
Note: It makes no sense to use two 1/8 inch washers on the 4 second size of the tool. You would remove no delay material and it would leave you at the max delay of the engine. On the 8 second size you would remove 4 seconds, which you can do with the 4 second side and no washers. The key is being able to get 1 second increment....
P.S. Don't mess with the set screw unless you determine the setting is off and the delay you expected is wrong. These are set at the factory. Loosen that set screw and let the drill bit slip and you won't be calibrated anymore and you'll be....screwed!
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