APC 2000 - Manual (Page 22)

Page 20
5.0 Operation
5.4 Line voltage bar graph
The line voltage bar graph displays the UPS's input voltage in discrete steps. Line
voltage is displayed when the
I/Test pushbutton is pressed and held. The example
above shows that the UPS's input line voltage is between 116 and 123 Vac (120 Vac
version UPS, see table for values for other versions). If no bars are illuminated, and the
UPS is plugged into a known working wall outlet, the line voltage is extremely low. Low
input voltage could be a result of an overloaded branch circuit, a misadjusted service
pole transformer or intentional local service brownout. The UPS will compensate for
this problem by boosting the load voltage supplied to your computer equipment. If all
six bars are illuminated, the line voltage is high and should be checked by a qualified
electrician.
5.5 Audible alarm
The UPS contains a beeper that emits sound through the ventilation openings. Events
that cause the beeper to sound are listed below.
5.5.1 On-battery operation
The UPS emits four short beeps every 30 seconds following failure of the utility. The
audible alarm is silenced until the next utility failure when the
I/Test pushbutton is
pressed.
5.5.2 Low battery
During an extended utility failure, the UPS will eventually emit continuous beeps to
indicate that less than 2 minutes (or 5 minutes, see section 5.6) of run time remain before
shut down due to battery capacity exhaustion. The low battery warning cannot be
muted.
Bar increments versus version type
100 Vac 120 Vac 208 Vac
220/230/
240 Vac
116 130 237 260
109 123 225 246
102 116 212 232
96 110 200 220
90 104 187 208
84 98 175 196