[Amps] bird meters

[vk3pa at vk3pa.com]

I have a couple of BIRD 100ua meters 2150-090 es 091
if I use these on my thruline 4522-002-8 50 ohm with 43 slugs wot  
error will I see?? as these slugs are for 30ua..meters!!
or can I recal the slugs es if so "how"
tu 73 vk3pa