Évaluations - 4, GPA: 4.3 ( )

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Once normal line voltages are restored, the UPS will recharge the battery and the capacity bar graph will show an increasing number of illuminated bars. 5.3 Output power bar graph Overload 85% 67% 50% 33% 17% The output power bar graph displays the power drawn from the UPS as a percentage of the UPS's full rated capacity. This example shows that the load equipment is drawing between 67% and 85% of the UPS's rated capacity. If this were a 1250VA UPS running a computer load, then the above would correspond to between 840 VA and 1060 VA (590 Watts and 740 Watts at 0.7 power factor). This is a typical installation. When the UPS is loaded such that five bars are illuminated, thoroughly test your complete system to be sure the UPS will not become overloaded. A thorough test includes running backup tape drives, disk drives, etc. If the UPS becomes overloaded, the overload bar will illuminate and the UPS will sound an alarm. Page 19 5.0 Operatio. 5.4 Line voltage bar graph Bar increments versus version type 120 Vac 208 Vac 220/230/ 240 Vac 130 237 260 123 225 246 116 212 232 110 200 220 104 187 208 98 175 196 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 5.0 Operatio. 5.5.3 Replace battery In the event the UPS's battery fails a battery test, the UPS will emit "chirps" for a period of 1 minute. If the UPS is left operating while in this condition, the UPS will emits chirps once every 5 hours until a successful battery test is completed. 5.5.4 Overload The UPS will emit a loud, sustained tone when overloaded. When an overload is applied while on-line, the alarm will sound until the overload is removed. If the overload is applied while on-battery, the alarm will sound until the UPS Enable control is switched off. 5.6 Option switches Note: Option switches may be thrown at any time and take effect immediately. 5.6.1 Option switch 1 The UPS contains utility fault detection circuitry that is extremely sensitive to line voltage distortions including spikes, notches, sudden dips and swells. The UPS is factory set to react to such line voltage distortions by transferring the load immediately to on- battery operation. This affords maximum protection for all load types. Where power quality is poor due to local cyclic heavy load switching or use of inexpensive fuel generators, the UPS may be caused to transfer to on-battery operation very often. If the UPS is powering loads that are known to operate normally under such conditions, such behavior is undesirable as battery capacity is being spent unnecessarily. The user may set Option switch 1 to the on ( I ) position in order to desensitize the UPS to rapid low amplitude line voltage fluctuations. When this is done, the UPS's upper transfer voltage is also increased by 3%, for a total of 13% above the nominal input voltage. This allows the UPS's battery charger to maintain maximum possible battery capacity, saving it for gross utility failures. Page 21 5.0 Operatio. 5.6 Option switches - continued 5.6.2 Option switch 2 Option switch 2 controls different functions depending upon the UPS version type. n 120 Vac version The UPS's factory set input voltage limits for on-line and SmartBoost operation are given in section 9.0 and are centered on the nominal input voltage of 120 Vac. When Option switch 2 is set to the on ( I ) position, the upper and lower transfer voltages are lowered by 4% and are centered on a nominal input of 115 Vac. This option is useful where the nominal input voltage is 110 to 115 Vac. n 220/230/240 Vac version The UPS's factory set on-battery output voltage and input voltage limits for on-line and SmartBoost operation are appropriate for use in regions where t...

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