Measuring Capacitance loading of Phono stage?


I have a Shure V15 III catridge that works best at 400-500 pF capacitance loading.

The Preamp quotes 40pF loading, cables are supposedly around 100 pF and so logically I should add a 300 pF capacior, but I would prefer to measure if this is possible.

My DMM is not up to snuff, I have been recommended to buy an ESR, but I thought I would ask everone here what is normal practice in this case.

I was intending on leaving the preamplifier off, taking the leads off the cartridge and measuring from that point with the tunrtable plugged into the phn stage (valve)