Hi,

I have a Hangar 9 DVT (digital volt meter combined with a tach) and I must admit, at first I was very frustrated with it.

However, I "accidently" found out that the lens for the photocell pulls off.

Once I did this, I was able shim the photocell till it was in the middle of the housing.

I then focused the lens by moving it back and forth while pointing it at a ceiling fixture light bulb until I got a solid reading of 360 (1/2 way between where it started to display 360 and stop displaying 360).

After this, I was able to get readings easily.

I hope it helps someone else.

Best regards,

Wayne Miller