Huawei, Data Loggers, models:

31507917	Quick Manual
Atlas 500	Technical White Paper
FusionDC1000A	Maintenance Manual Installation Manual
FusionModule 1000	Maintenance Manual
FusionModule 1000A20	Maintenance Manual
FusionModule500	User Manual
SmartLogger1000	User Manual
SmartLogger3000	User Manual
V100R021C00	User Manual