USER'S MANUAL 990-057Revision K, May 2004Use with Firmware Release V1.19 or higherMODEL HF22 kHz HIGH FREQUENCYRESISTANCE WELDING POWER SUPPLYMODEL NUMBER STOCK NUMBERHF2/230 1-264-03HF2/380 1-264-03-01HF2/460 1-264-03-02HF2/208 1-264-03-03HF2S/230 1-265-03HF2S/380 1-265-03-01HF2S/460 1-265-03-02HF2S/208 1-265-03-03Units with the built-in Weld Sentry Option also require User's Manual No. 990-291WARNINGPlease be sure to read all personnel and equipmentsafety precautions noted in this manual.