A.22. The following factors should be taken into account in the choice of instrumentation:

(a) The adequacy and sufficiency of the measuring range, sensitivity and accuracy;

(b) The need to extend the ranges of instrumentation in special operational situations, and the procedures necessary to accomplish this;

(c) Response times;

(d) Environmental qualification.

A.23. The instrumentation should be readily identifiable (e. g. by means of colour coding). In the design for the display of information to the operator in the control room, ergonomic considerations should be taken into account.