You have the same meter a bunch of members have. Pretty good meter in my opinion.
If your trying to measure Kcd, generally you need to measure lights in a dark house or building or outside. You want to take measurements at different distances depending on the lights capability.
This is a general breakdown -
Lights under 50k - measure at 1m is fine
Lights 50k-100k - measure at 3m or more
Lights 100k & up - measure 5m or more if possible. Or the longest distance you can do accurately by yourself.
Make sure you use accurate distances for your testing, especially for very powerful lights. A foot can make a very noticeable difference.
Generally you don’t take your reading at the light start up. Most lights read high and some have a flare at startup. So give it a minimum of 5-10 sec before taking a reading. 30 seconds or so is best though.
Once you have that reading you need to calculate to the Kcd.
If a light is tested at 1m, then that is your true Kcd. If the reading is taken at longer distances, you simply multiply the distance times itself and then by the reading.
For example a 2000 reading taken at 5m. You go 5 x 5 = 25. 25 x 2000 is 50,000 or basically 50kcd.