称 程 秤(稱)　cheng

禾he2 grain

In the following characters 禾 appears, yet all four 称, 程, 秤(稱),  sound like cheng.

The common semantic concept is: weighing (of e.g. grain) on a balance (which looks like the figure for grain).

称 cheng1 to weigh, (publicly) then state (proudly) the accurate measured weight: thou didst weigh and state proudly thy measure of grain.

https://hanziyuan.net/#%E7%A7%B0

程, cheng2 rule regulation order namely the regulation and rule of what the weighed object weighs, the official weights and measures rule.  Top right is “mouth” 口 bottom right is king 王　The mouth of the king states the order, the rule, as to the proper measure of grain. https://hanziyuan.net/#程

秤 cheng4 the scale, balance on which the grain is weighed, later became also “steelworks”. Right component means “level”

稱 cheng4 this is a variant character of  秤