2000 hours is minimum for IRE
Prerequisites for Instrument Rating Examiner - IRE(A) are specified in FCL.1010.IRE.  Applicants for an IRE certificate for aeroplanes shall hold an IRI(A) or an FI(A) certificate with the privilege to instruct for the IR(A) and shall have completed:
2000 hours of flight time as pilots of aeroplanes; and
450 hours of flight time under IFR, of which 250 hours shall be as an instructor.
IRE privileges
The privileges of IRE for aeroplanes are specified in FCL.1005.IRE. The privileges of the holder of an IRE certificate are to conduct skill tests for the issue, and proficiency checks for the revalidation or renewal of EIRs or IRs.