It's a German make, I could look it up later today. The maker calibrated it; I certainly don't have the means nor the need to calibrate it myself.
Don't overthink this; you can tighten the force frame screw by hand as well, IMO.
Using a calibrated torque wrench is overkill in this context. Keep in mind that the tensile force of a screw or bolt depends not only on the mounting torque but also on the lubrication and thread quality. There is no lubrication mandated for the little screws used in computer assembly, including that of the force frame, so there you go.
From what I understand, the force frame has two functions: Preventing the CPU package from lateral movements in the socket, creating some pressure between package and the LGA contact springs of the socket. For both of these purposes, the forces acting between force frame and package and socket can certainly have some tolerances. On top of that goes the cooler, which is mounted with mechanisms which vary from vendor to vendor: Spring loaded screws in a stiff frame; torque-mounted screws in a stiff frame; stiff screws in a frame with specific flexibility. The resulting pressure of the cooler onto the package first and foremost serves the purpose of making for a good thermal contact between heat spreader and cold plate. But I presume it additionally adds to the pressure between CPU package and LGA contacts. So for the latter, there seems to be redundancy, making it less dependent on the particular force exerted by the (in case of SP5: single) screw of the force frame.