First GetADC using DT_Analog.pbp incorrect measurement afterwards is good. Why?

I am using Darrel Taylor's DT_Analog.pbp for taking analog measurements. Measurements are taken in a loop using GetADC.
The first ADC measurement is always an incorrect value. After the first measurement, all consecutive measurements are correct.
To get around this I do a single measurement first. Then I run my loop to take multiple measurements using GetADC. What is the reason the first measurement is always bad or incorrect?

Your help is always greatly appreciated.

Bryan

Hard to comment without seeing any code.

Does the PIC have time to stabilize before taking the first reading?

What if you add a short PAUSE?

Robert

At least for the 12F683 it has a charge holding capacitor in the ADC circuit. The way I understand it that needs to be give the appropriate amount of time to charge fully before you take a reading. That time may change depending on which chip you're using.

My guess is that Demons suggestion of a short pause would solve the problem. Or a counter that won't allow display until the appropriate time has elapsed. Either gives the ADC a chance to stabilize and provide the correct reading.