EBME Forums Forums Maintenance Test Equipment How to calibrat DNI NEVADA 113A patient simulator?

Hallo everyone

This is a patient simulator made with old-fashioned analog circuitry.
I've noticed my pulse rate is consistently low.
For example, if we select 60, it will actually display as 59. select 30, the actual display will be 29. select 120, the actual display will be 118.............

There are many potentiometers on the circuit board, and I don't know how to adjust them.
If anyone knows how to adjust this, please let me know.

thanks.

Must be one of the pots ... be careful!

Have you been able to find out what happens at the various test points?

Also ... can you rely on the accuracy of the monitor? I suppose you have checked both monitor and simulator with other simulators and monitors?

Lastly (and by the way) ... are results consistent across the different ECG amplitudes? And what does the square wave output give in terms of accuracy?