Reporting question for Bias Master™ - TAD, tube tester, with 4 probes

Product:
Bias Master™ - TAD, tube tester, with 4 probes

Question:
Does it come with a list of different amps to get bias numbers from ?

Answer:
I was looking at the formula to calculate bias. It's states "Let’s say we found it (PLATE VOLTAGE) measured 420VDC..." How does one measure that ? Does the Bias Master have that capability ? I notice for the 6L6GT in the equation 420V is used but that value differs a lot from both what is on the pdf file and the sheet that shown on the video of 300 -390 V for that tube.