16 | ni.com | NI PXIe-4302/4303 and TB-4302/4302C• Keep the ambient temperature as stable as possible.• Keep the terminal block, module, and chassis in a stable and consistent orientation.• Install the PXIe filler panels in any unused slots.• When stacking the system, avoid stacking the chassis above a heat source as heat rises andcan introduce error.• Allow the thermal gradients to settle after a change in system power or in ambienttemperature. A change in system power can occur when the system powers on. Refer to thewarm-up time in the NI PXIe-4302/4303 Specifications for more information.• If your PXIe chassis has fan filters, clean or replace them regularly to ensure proper systemcooling. Refer to the PXI/PXI Express Chassis Fan Filter Kit document for moreinformation.Note Refer to the Maintain Forced-Air Cooling Note to Users for moreinformation about maintaining optimal forced-air cooling for PXI/PXI Expressdevices.More InformationAfter you install NI-DAQmx, the NI-DAQmx documentation is available from Start»AllPrograms»National Instruments»NI-DAQmx. Additional resources are online at ni.com/gettingstarted.You can access online device documentation by right-clicking your module in MAX andselecting Help»Online Device Documentation. A browser window opens to ni.com/manuals with the results of a search for relevant documents. If you do not have Web access,documents for supported modules are included on the NI-DAQmx disc.Troubleshooting• Go to ni.com/support/install or ni.com/kb.• If you need to return your National Instruments hardware for repair or device calibration,go to ni.com/info and enter rdsenn to start the Return Merchandise Authorization(RMA) process.Specifications (TB-4302/4302C)Note NI PXIe-4302/4303 module specifications are located in theNI PXIe-4302/4303 Specifications document.All performance specifications are typical unless otherwise noted. These specifications are validwithin the full operating temperature range.