12
PowerLab Owner’s Guide
Self-Test
Now that you are familiar with some of the features of your
PowerLab, you should check that it is working properly before you
connect it to your computer.
The PowerLab performs a diagnostic self-test each time it is switched
on, whether or not it is connected to a computer. To test that your
PowerLab is functioning properly when you turn it on, follow the
instructions below, and observe the effects.
1. Connect the PowerLab to a power outlet using the power cable
that came with your unit. Turn the power on at the wall.
2. Turn on the power switch located on the rear of the unit.
All three labelled indicators on the front panel should turn on at
least briefly while the PowerLab is started up. The Power
indicator on the front panel should glow blue while the PowerLab
is on (see Figure 1–1 and Figure 1–2). If the internal diagnostic
check finds no problems, the Status indicator should flash yellow,
and then stay green. The Trigger indicator should flash yellow,
and then turn off.
If the indicators perform as described above, then your PowerLab has
successfully performed its internal self-test, and it can be safely
connected to your computer. If your PowerLab would not
successfully complete its self-test, something is wrong.
If the Power indicator does not glow blue when the power switch is
turned on, then there is a problem with the power source, power
cable, or PowerLab itself. Check connections and so on. If an error is
detected during the self-test, the Status indicator will flash red.
Flashing lights are used when the problem is one that prevents the
PowerLab communicating with the computer, and so cannot be
shown in the software. Four red flashes separated by a yellow flash
means there is a low-level software or firmware fault. Red flashes
means there is a hardware fault. Turn everything off, and then after at
least five seconds turn the PowerLab back on again. This should clear
a temporary problem. If it still continues to flash red, then the
PowerLab may need repair.
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