Delta-T SPN1 User Manual

Also see for SPN1: Technical note

Delta-T SPN1 User Manual Manual pdf 31 page image

ProblemsProblem reportsAlways try to isolate the source of the difficulty. It will help considerably ifyou can mention as many relevant details as possible. In particular:• A description of the fault, its symptoms, or error messages• If logging, what logger you are using, details of the logging programand any other devices connected to it• Details of any PC you are using• Software version numbers and hardware serial numbers (see below)Locating version and serial numbersThe SPN1 serial number label is on the lower part of the case. Theinternal software (firmware) version number is displayed in the About boxusing SunRead.TroubleshootingSPN1 not respondingThe red LED inside the SPN1 bezel will flash when the SPN1 is takingreadings.If using the RS232 cable check that you are using the correct cable, andthat it is plugged into the same serial port on your PC that you haveselected in the SunRead software.If logging, check the logger cable and compare with your logger wiringconnection diagram. Make sure that the DL-Power wire is connected to>5V to enable the analogue outputs.Check also your logger. For Delta-T loggers check the sensorconfiguration, power warm-up relay wiring connection and warm-up relayprogram configuration.Unexpected output readingsPay particular attention to the power supply and grounding arrangements.Try operating without the heater connected and see if that affects thereadings.Try logging the SPN1 direct to a PC using the SunRead software.Make sure the desiccant is fresh and the dome is clean.SPN1 User Manual v1.0 Warranty and service z 31