How do I mix an 8 hour resource with a 24 hour resource?

[randrews4]

I'm using MS Project to schedule work in a lab. Some resources (people) work about 8 hours a day and about 40 hours a week. Other resources (hardware) are available 24/7. We have a lot of analyses where a chemist prepares a mix and then must let it dry (or cook or extract) for at least 12 hours. When I try to designate the "lab" as a 24 resource, the default start time comes up 12:00 AM. Theat means if a chemist completes a preparation at 2:30 PM and puts in in the drier, MS project doesn't want to start until midnight.

How do I get MS Project to recognize that the "lab" resource is available 24/7?

 

[randrews4]

I found a way to do it. This is counter-intuitive, but it works. I check the box in the Advanced tab of Task Information that says "Scheduling ignores resource calendars". The "24 hours" calendar is chosen.