How to install and con
fi
gure Option DPW
Con
fi
gure the preferred (active) supply
When two Power Supply modules are installed in the instrument, one is con
fi
gured
as the primary supply and the other is con
fi
gured as the backup supply. In the
event that the primary supply fails, the backup supply automatically provides
power to maintain instrument operation.
NOTE.
The preferred supply con
fi
guration only applies if two Power Supply
modules are installed and both of the supplies are connected to a power source.
If there are two Power Supply modules installed but one of the supplies has a
failure, the good supply will be used to power the instrument regardless of the
preferred supply con
fi
guration.
The recommended usage strategy is to con
fi
gure one supply as preferred, and use
the second supply only in case the
fi
rst supply has a failure. This usage strategy
allows the backup supply to have the maximum remaining life when it is needed.
The preferred supply con
fi
guration is not saved as part of the preset system.
Therefore, the preferred supply con
fi
guration will not change when you activate
any of the system presets, including the Factory Default preset.
Perform the following steps to con
fi
gure which Power Supply module is the
preferred (active) supply:
1.
Check the status of the front-panel PWR1 and PWR2 indicators:
Bright green indicates the preferred (active) supply.
Dim green indicates the inactive (backup) supply.
NOTE.
If the color of the PWR1 or PWR2 indicators is other than bright or
dim green, service the faulty Power Supply module before proceeding.
2.
Check the temperature weighted hours of the installed supplies:
NOTE.
It is recommended that you con
fi
gure the supply with the most temperature
weighted hours to be used as the primary preferred supply. This allows for the
newer supply to be preserved so it can provide the best possible backup should the
primary supply fail. For more information about temperature weighted hours,
see the SPG700 User Manual.
a.
Press the
SYSTEM
button to access the SYSTEM menu.
b.
Press the up (
▲
) or down (
▼
) arrow button to select
SYSTEM :
DIAGNOSTICS
, and then press the
ENTER
button to access the
DIAGNOSTICS menu.
SPG70UP Field Upgrade Instructions
11
