bids are invited for customized amc/cmc for pre-owned products - r pre-owned products - 3 nos door frame metal detectors and 02 nos hand held metal detector annual maintenance contract amc; annual maintenance contract (amc); quarterly; yes a. door frame metal detectors (dfmds): minimum two scheduled preventive maintenance visits per yearat prison location. breakdown visits as required based on complaints raised by the prison authority amc shall cover: inspection, cleaning, calibration, and testing. minor repairs and replacement of basic consumables (e.g., fuses, connectors, batteries if applicable). submission of maintenance report duly signed by prison officials after each visit. b. hand held metal detectors (hhmds): in case of malfunction, hhmds will be sent by the respective prison administration to the service center. post-repair, the service center shall return the hhmds to the concerned prison, in proper working condition. . amc shall cover: diagnosis and minor repairs. replacement of basic consumables (e.g., rechargeable batteries, switches, cables if applicable). total quantity :