Hioki 3227 AC voltage input change

[R-1125F]

I picked up a Hioki 3227 that is set for 100VAC power.  I need to change this to 120VAC.   There are many taps on the transformer input but nothing is marked.  Could someone tell me what jumpers to change?

[DavidKo]

I expect that now are 2 windings in parallel. Pictures will help. Plug the device to AC100 (I use autotransformer) measure the voltages across the taps. Usual connection is 0-100-10-10 and second winding same 0-100-10-10. In your case you will leave the zeros interconnected and move the parallel connection of the "phase" to the last taps.

[R-1125F]

Thank you for the reply.  H  I figured it out.  What I did was measure the winding resistance and picked the highest one for 120V.  It seems to work fine (no smoke).  The confusing part is that there were 9 wires for the 2 primaries.  One wire went to the transformer frame/shield.   The other 8 wires were just a standard dual primary multi-voltage transformer.  The other confusion was a jumper for the AC input.  That also needed to be moved.  I have attached the before and after photos for the 100V and the 120V jumper connections.  Hioki is really bad about posting service information.

[DavidKo]

Hioki does not support older equipment. The jumper seems similar to one in my Hioki 7020 only split to 2 jumpers.