IBM UPS750TLV - Manual (Page 12)

8
Diagnostic Utility
Voltage The uninterruptible power supply has a diagnostic feature that displays the utility voltage.
Plug the uninterruptible power supply into the utility power outlet.
The uninterruptible power supply starts a self-test as part of this procedure. The
self-test does not affect the voltage display.
Press and hold the button to view the utility voltage bar graph display. After a few
seconds, this five-LED Battery Charge display on the right of the front panel will
show the utility input voltage.
Refer to the figure at left for the voltage reading, corresponding to the configured nominal
output voltage.
The display indicates the voltage is between the displayed value on the list and the next
higher value.
If three LEDs are illuminated, the utility voltage is within the normal range. If no LEDs
are illuminated and the uninterruptible power supply is plugged into a properly function-
ing utility power outlet, the line voltage is extremely low. If all five LEDs are illuminated,
the line voltage is extremely high and should be checked by an electrician.
On Battery Operation
The IBM uninterruptible power supply switches to battery operation automatically if the utility power fails. While running on
battery, an alarm beeps four times every 30 seconds.
Press the button to silence this uninterruptible power supply alarm. If the utility power does not return, the uninterruptible
power supply continues to supply power to the connected equipment until the battery is fully discharged.
If you are not using PowerChute, shut down the operating system and turn off the computer before the uninterruptible power
supply fully discharges the battery.
Determining On Battery Runtime
The uninterruptible power supply battery charges when connected to utility power. The battery charges to 90% capacity during
the first three hours of normal operation. Do not expect full battery run capability during the initial charge period.
Battery Runtime Table
This chart shows the typical on-battery runtime in minutes.
Load (VA) Load
(watts)
750VA 1000VA 1500VA
50 30 105 224 269
100 60 57 127 157
200 122 28 64 80
300 184 18 41 51
400 247 13 29 37
500 311 9.7 23 28
600 377 7.7 18 22
700 447 6.4 15 18
750 500 5.0 13.5 16.5
800 511 – 12 15
900 579 – 11 13
1000 700 – 8 11
1200 790 – – 9.0
1400 936 – – 7.4
1440 1050 – – 6.7
1500 1050 – – 6.7