>> I would go with the 87 as it seems to be better in just about every
>>> way looking at the specs. It has better accuracy and resolution in
>>> almost all categories.
>>
>> Accuracy and resolution are great, but for me in my work these really
>> come in second to features (the low-Z and low-pass features,
>> specifically).
>>
>> If it were not for the lack of a low-Z feature I'd buy the 87 in a
>> second.
>>
>> But I need to determine if -- as pertains specifically to VFD voltage
>> measurement -- the 117 is deficient (ie, does noise really cripple
>> voltage measurement, and how often is this a problem when working in
>> VFDs) in this respect.
>>
>> Thanks.
>
> If you really want the low-z and LP filter then why not get the 117
> and create a simple LP model? You could probably even add it to the
> fluke somehow. It's pretty simple to do. Either a res and cap(not for
> current though).
Modding a meter can potentially make it unsafe, so not a good idea to recommend. The Fluke 289 has both features, so no need to bodge it.
Dave.