13
C)
Pressing the
Set Button
again will move you to your next fan. Repeat
steps
A
and
B
for as many fans as you have connected.
Step 4: Power Tolerance Settings
Pressing the
Set Button
again will now take you to the final procedure,
the Power Tolerance Settings. There are two settings, the +5 VDC
Tolerance
Fig. 3-9
and +12 VDC Tolerance
Fig. 3-10.
Use the
Up
and
Down Buttons
to cycle through the range of values.
A)
Set the +5 VDC tolerance to one of the four range values: +0.25, +0.5,
+0.75, and +1.0 V.
Note:
For most electronic circuits using +5 VDC
working power with a highly stable source, we suggest that the tolerance
be set at 0.25 V (5%).
B)
Press the
Set Button
again to reach the +12 VDC tolerance setting.
C)
Set the +12 VDC tolerance to one of the four range values: +0.60,
+1.20, +1.80, and +2.40 V.
Note:
Most +12 VDC sources are used for hard disk drive and CD drive
motors, or for fans. When no devices are running, the power needs are
not excessive, and surges in the power will not be too great. But when the
loading is higher, the system can generate large changes in the power
source, especially evident for example, when a CD drive spins-up.
Outside a certain range in the power supply, your system may experience
errors in operation, so you must pay attention to the power tolerance
range setting.
Finally, pressing
Set Button
again will bring you out of Set-Up Mode and
return you back to Normal Operating Mode.
