Intercom & Telephone System · Internal Communication
Auto telephone exchanger: KJ-1/2/3/4, Auto telephone KH-1SG, Auto telephone KH-1SQ, Auto telephone KH-1T/G, Auto telephone KH-1J, Auto telephone KH-2T/G, Auto telephone KH-2Q, Auto telephone KH-1SF, Explosion-proof telephone KH-1B by Jiaxing Kexun Electron Co., Ltd. DNV TA certificate TAA00002CJ.
| Functional test of all stations | monthly or per the safety management system |
|---|---|
| Battery backup check/replacement | annually or per maker's schedule |
| Explosion-proof enclosure seal inspection | annually, particularly in hazardous area locations |
| Full system inspection (exchange unit and wiring) | at each Special Survey |
Typical intervals for this design class, not the manufacturer’s figures for your model. The manufacturer’s manual is binding.
Note: the supplied category for this entry is 'Radar Level Gauge', but the manufacturer data and DNV type approval (TAA00002CJ) describe an automatic telephone exchange and explosion-proof telephone system, not a level gauge; the content above addresses the telephone/intercom equipment as the actual product. Internal communication systems, including explosion-proof stations in hazardous areas, are checked at Special Survey for correct function and certified integrity of hazardous-area equipment.
Listed in the DNV Approval Finder at the time we recorded it. The certificate is issued by DNV, not by us; check its current status at DNV.
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