View Full Version : GHL Doser 2 Cannot Connect via USB

07/05/2017, 09:50 AM
As the title states, I cannot get the Doser to connect via USB to the Control Center. I've scoured the forums and internet but seems all the contact info in the threads are from years ago.

Also finding the correct manual is nearly impossible without logging into some dropbox account.

Any assistance is appreciated.

07/05/2017, 09:56 AM
Disregard, I manually changed the default port to the correct one and viola. Needed to take a few breaths then figured it out.

Delete plz

07/05/2017, 10:05 AM

Glad you figured it out. :)

No need to log into a Dropbox account, just open the file and download it.

07/05/2017, 11:42 AM
Thanks for the quick response. I'm running into another issue with calibration.

I've been trying to calibrate pump 1 & 2. Ive gone through 900 ml in testing.

Setting the flow rate between 30 & 60 and no matter which pump speed I cannot get within less than 5ml. Every time the output is less than the setting volume.

I do not need to be within .1ml, but 5ml off is way too much.

Not sure how to correct.

07/05/2017, 11:51 AM
You aren't setting the pump speed when you change the ml, you are supposed to run the pump (it does it for one minute) and then put in that box the amount of fluid the pump actually pumps. So if you set it to fast, calibrate, then plug in 54.7 ml or whatever your result is.

Unless I misunderstood your question.

07/05/2017, 12:13 PM
Ahhh now the lightbulb came on. Thank you!

07/05/2017, 12:21 PM
I guess the four speeds of the pump are fixed and cannot be changed. By setting the amount of fluid pumped in a minute you are allowing the doser to calculate how long to run the pump for at the given fixed speed to dose the amount of fluid you want.