scope:

This specification covers single range mechanical and electric self-generating tachometers of the types specified hereinafter for general use.

Tachometers shall be of the following types, as specified (see 6.1.1):

Type IC/APB - Chronometric, portable, single range (0 to 10,000 revolutions per minute (r/min)) Type IC/BFB - Centrifugal, fixed (flexible drive) single range Type IC/BPB - Centrifugal, portable, single range: IC/BPB-1: 50 to 500 r/min IC/BPB-2: 300 to 3,000 r/min IC/BPB-3: 1,000 to 10,000 r/min IC/BPB-4: 5,000 to 50,000 r/min Type IC/CFB - Hesonant, fixed, single range: IC/CFB-A: 900 to 1,200 r/min IC/CFB-B 900 to 1,500 r/min IC/CFB-C: 1,200 to 1,800 r/min IC/CFB-D: 1,425 to 2,175 r/min IC/CFB-E: 1,625 to 2,375 r/min IC/CFB-F: 2,175 to 2,875 r/min IC/CFB-G: 2,250 to 3,750 r/min

Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, Naval Sea Systems Command, SEA 3112, Department of the Navy, Washington, DC 20362 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter.

IC/CFB-H: 2,850 to 4,350 r/min IC/CFB-I: 3,250 to 4,750 r/min IC/CFB-J: 4,250 to 5,750 r/min IC/CFB-K: 5,250 to 6,750 r/min IC/CFB-L: 5,500 to 8,500 r/min IC/CFB-M: 6,500 to 9,500 r/min IC/CFB-N: 9,000 to 12,000 r/min IC/CFB-O: 9,000 to 15,000 r/min IC/CFB-P: 12,000 to 18,000 r/min IC/CFB-Q: 15,000 to 21,000 r/min IC/CFB-R: 18,000 t0 24,000 r/min Type IC/CPB - Resonant, portable, single range: IC/CPB-A: 900 to 1,200 r/min IC/CPB-B: 900 to 1,500 r/min IC/CPB-C: 1,200 to 1,800 r/min IC/CPB-D: 1,425 to 2,175 r/min IC/CPB-E: 1,625 to 2,375 r/min IC/CPB-F: 2,175 to 2,875 r/min IC/CPB-G: 2,250 to 3,750 r/min IC/CPB-H: 2,850 to 4,350 r/min IC/CPB-I: 3,250 to 4,750 r/min IC/CPB-J: 4,250 to 5,750 r/min IC/CPB-K: 5,250 to 6,750 r/min IC/CPB-L: 5,500 to 8,500 r/min IC/CPB-M: 6,500 to 9,500 r/min IC/CPB-N: 9,000 to 12,000 r/min IC/CPB-O: 9,000 to 15,000 r/min IC/CPB-P: 12,000 to 18,000 r/min IC/CPB-Q: 15,000 to 21,000 r/min IC/CPB-R: 18,000 to 24,000 r/min Type IC/EFA - Electrical, (alternating current (a.c.) voltage responsive) fixed single range (direct drive range between 500 to 5,000 r/min Type IC/EFB - Electrical, (magneto-voltmeter) fixed single range (direct drive range between 0 to 4,000 r/min Type IC/EFC - Frequency responsive, electrical (control box and voltmeter) fixed single range (direct drive range between 500 to 100,000 r/min Type IC/EFD - Frequency sensitive, electrical, nonrotating (magnetic pickup) fixed single range (direct drive range between 0 to 100,000 r/min IC/EFD-A: Consists of three elements, a magnetic pickup, transducer, and indicator IC/EFD-B: Consists of two elements, a magnetic pickup and a single unit housing the transducer and indicator Type IC/EPC - Electrical (reactance) portable, single range IC/EPC-3A: 20 to 200 r/min IC/EPC-3B: 50 to 500 r/min IC/EPC-2A: 100 to 1,000 r/min IC/EPC-1A: 200 to 2,000 r/min IC/EPC-1B: 500 to 5,000 r/min IC/EPC-1C: 1,000 to 10,000 r/min Type IC/EPD - Electrical (magneto-voltmeter) portable, single range (0 to 10,000 r/min) Type IC/PEC - Photo-electric, single range: IC/PEC-1: 0 to 1,000 r/min IC/PEC-2: 0 to 3,000 r/min IC/PEC-3: 0 to 10,000 r/min IC/PEC-4: 0 to 30,000 r/min Type IC/TDC - Tachometer, digital contact: 0 to 20,000 r/min