Troubleshooting; Frequently Asked Questions - National Instruments SCXI-1000 Schnellstartanleitung

Troubleshooting

This section contains troubleshooting tips and answers to questions that SCXI users commonly ask
NI technical support staff.
Tips
Before you contact NI, try the following troubleshooting tips:
• If you have problems installing your software, go to
troubleshooting, go to
• If you think you have damaged your device and need to return your National Instruments hardware
for repair or device calibration, refer to
how to begin the Return Merchandise Authorization (RMA) process.
• Make sure the SCXI chassis is powered on. If you are using a PXI/SCXI combination chassis, make
sure the PXI chassis is powered on.
• Make sure you have installed the latest version of the NI-DAQ driver software that supports the
devices in your system.
• If MAX cannot establish communication with the chassis, try one or all of the following:
– Connect the DAQ device to a different module in the chassis.
– Try a different cable assembly.
– Try a different chassis.
– Try a different DAQ device.
• Make sure that each SCXI chassis connected to a single DAQ device has a unique address.
• Make sure that the cable is securely connected to the chassis.
• Check for bent pins on the module, chassis backplane, and the device connector.
• If you have multiple SCXI modules, remove all the modules and test each module individually.
• If you are getting erroneous readings from the signal source, disconnect the signal source and
short-circuit the input channel to ground. You should get a 0 V reading. Alternatively, connect a
battery or other known signal source to the input channel.
• Run an example program to see if you still get erroneous results.

Frequently Asked Questions

My chassis is powered on, and my modules are configured for multiplexed mode, but I am not
getting good data on any channel. What is causing this problem?
The SCXI chassis has backplane fuses, fused at 1.5 A on the SCXI-1000 chassis and at 4 A on the
SCXI-1001 chassis. One or both of the fuses might be blown.
On the SCXI-1600, you can determine whether the fuses are blown by looking at the power LEDs. Both
power LEDs on the SCXI-1600 and the LED on the chassis must be lit. If any of the LEDs are not lit,
one or both fuses are blown.
On the SCXI-1000, the backplane fuses are located behind the fan. On the SCXI-1001, the backplane
fuses are located behind the right-hand fan, near the power entry module, as viewed from the rear of the
chassis.
Complete the following steps to examine and/or replace fuses.
1. Power off the chassis and remove the power cord.
2. Remove the four screws that secure the fan and filter to the rear of the chassis. When removing the
last screw, be careful to hold the fan to avoid breaking the fan wires.
SCXI Quick Start Guide
, enter your device name, or go to
ni.com/support
ni.com/info
16
ni.com/support/daqmx
ni.com/kb
and enter the info code
. For hardware
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