5.0 Operation
5.4 Line voltage bar graph
Nxz˜
˜
675 mxz
75C mxz
77547854
795 mxz
130
123
116
110
104
98
237
225
212
200
187
175
260
246
232
220
208
196
The line voltage bar graph displays the UPS's input voltage in discrete steps. Line voltage is displayed when theI/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 the UPS will soon shut down due to battery capacity exhaustion. The low battery warning cannot be muted.
Page 20
