What does CL 200 mean on the electric meter? Is that the amp?

Sometimes the electric meter from the electric company reads CL 200 and 240 V.

That 240V means the meter box itself is designed for 240V electric service;

The CL200 means the box is rated for up to 200A continuous 220/240V power draw through it 

It tells the power should not exceed 200A on each “side” or live lead of the 220/240V wiring, however can be less.

Aposun CHD9001 offers 2 types of measuring range for choice—3×220/380V 1A & 3×220/380V 5A. For the higher voltage or ampere, we can use relative Current transformer (CT) and Pressure transformer (PT).