Hi Chris,
The “duration” you see in MWEL does not equal the physical volume. The variable labelled “reward_duration” carried over since Alina’s rig was still using NI’s DAQ + solenoid, but wanted to keep the same code to minimize confusion.
In terms of the syringe pump in rig 1, I followed your instructions in which the real volume is calibrated with additional properties such as the flow rate and syringe diameter, etc.
I settled with the value 0.15us after measuring 100s of pumps to calibrate/measure the real volume. For instance, after testing two devices (NE500), I found that the value of 0.15us would lead to approx. 0.1mL per pump. This would allow us to dispense a total of 200mL worth of liquid across a typical recording comprised of 2000 fixations (~2-3 hours).
Yoon