Rev D CHP Max DC Power Supply 5-11
The factory-default threshold and deadband values for each parameter are listed in
Table 5.4. A deadband or hysteresis value prevents alarm oscillation. Once a threshold is
exceeded, the alarm can only be downgraded if the parameter is at least a deadband below
the threshold value.
➤ To adjust the alarm threshold limits
1. Follow the procedures for Local Monitoring with the CHP-CMS Craft Management
Software—page 1-12.
2. Double-click the PS module identifier in the module inventory or double-click on the
desired power supply module in the image map to open that module’s management
window.
3. Right click on the Internal Temperature meter and select
Configure from the shortcut
menu. Refer to Figure 5.9.
4. In the Alarm Setup area, drag the slider or enter the desired alarm limit value for the
Major low, Minor low, Minor high, and Major high. Click
OK to save these alarm limit
values.
5. Right click on the +12 VDC meter and select
Configure from the shortcut menu. Refer
to Figure 5.9 on page 5-12.
6. In the Alarm Setup area, drag the slider or enter the desired alarm limit value for the
Major low, Minor low, Minor high, and Major high. Click
OK to save these alarm limit
values.
7. Repeat Steps 5 and 6 to the +5 VDC, +3.3 VDC, and –5 VDC meters if you want to
adjust these alarm threshold values.
Table 5.4 Factory-default Threshold and Deadband Values
Parameter Major
Low
Minor
Low
Nomina
l
Minor
High
Major
High
Shutdown
Threshold
Deadband
+12 V
DC Output 11.6 11.8 12.25 12.7 12.8 13.5 1
+5 V
DC Output 4.7 4.9 5.25 5.6 5.7 6.7 1
+3.3 V
DC Output 3.3 3.4 3.6 4.0 4.1 5.2 1
–5 V
DC Output –5.6 –5.4 –5.1 –4.7 –4.5 –6.25 1
Fan 1 and 2 Current
CHP-PS/DC1 (mA)
149 150 275 449 450 N/A 1
Fan 1 and 2 Current
CHP-PS/DC1-Q (mA)
59 61 85 448 450 N/A 1
Internal Temperature
(°C)
0 15438085 100 1
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