NORM 
Available on select models
Chronic mild brownouts that cause the UPS to switch to battery power frequently could leave your batteries low on charge. The adjustable voltage potentiometer allows you to prevent excessive battery drain by lowering the voltage point at which the UPS switches to battery. To keep your UPS from switching to battery during mild brownouts, turn the potentiometer clockwise to lower the voltage point as much as 18% below the nominal setting of 190 volts (when set fully clockwise).
Note: Your UPS’s optimal setting will depend on the voltage conditions in your area. Adjust the potentiometer clockwise only if you want to reduce how often your UPS switches to battery. Your UPS will function properly at any setting. Use caution when adjusting the potentiometer while the UPS is powering
Indicator Lights
All Indicator Light descriptions apply when the UPS is plugged into a wall outlet and turned ON.
This green light will turn ON whenever your UPS is plugged in and receiving normal AC line power.
This red light will turn ON when your UPS is providing your equipment with battery power.
Available on select models
This yellow light will turn ON after you test your UPS battery’s charge with the “Mute/Test” Switch to indicate that the UPS’s battery is less than fully charged. If it stays on continuously, contact Tripp Lite for service. The light will flash after you set the “OFF/ON” Switch to the “OFF” position to indicate that the UPS will not provide battery backup during a blackout or brownout.
Other UPS Features
AC Receptacles
The receptacles provide your connected equipment with AC line power during normal operation. They will provide battery power during blackouts and brownouts only if the “OFF/ON” Switch is set to the “ON” position. The receptacles also protect your equipment against damaging surges and line noise.
RJ11 Telephone Jacks
These jacks protect your equipment against telephone line surges. Connecting your equipment to these jacks is optional. Your UPS will still work properly without this connection.
Battery Replacement Door
Under normal conditions, the original battery in your UPS will last several years. Battery replacement should be performed only by qualified service personnel. Refer to “Battery Warnings” in the Safety section on page 2.
DB9 Serial Port
Available on select models
The DB9 port connects your UPS to any workstation or server. Use with Tripp Lite software and cabling to automatically save open files and shut down equipment during a blackout. This port sends
Tripp Lite Customer Support for more information.
5
