5.0 Operation

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.

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APC 1250, 2000, 900 user manual Option switches, Replace battery, Overload

900, 1250, 2000 specifications

The APC series, particularly models 2000, 1250, and 900, represents a cornerstone in the uninterruptible power supply (UPS) landscape, providing robust solutions for protecting sensitive electrical equipment from power disruptions. These models are designed to ensure high availability and power reliability for a range of applications, from personal use to larger enterprise systems.

The APC 2000 is known for its high power capacity, rated at 2000VA/1600W. It features an advanced LCD interface that provides essential information, such as battery status and load capacity. This model incorporates pure sine wave output, making it ideal for devices that require a stable and clean power source. It also offers multiple outlets and communication ports, including USB and SmartSlot for additional network management capabilities. The integration of PowerChute software allows users to efficiently monitor and manage the UPS, ensuring proactive response to any power-related issues.

The APC 1250, with a capacity of 1250VA/750W, is tailored for medium-sized setups. Its compact design makes it suitable for small offices and home workstations. The model boasts similar features to the 2000, including an intuitive LCD display and pure sine wave output. The APC 1250 also provides automatic voltage regulation, ensuring that connected devices receive consistent voltage without unnecessary battery usage. The unit’s design prioritizes user-friendliness with tools for easy installation and monitoring.

Meanwhile, the APC 900 operates at 900VA/480W, catering specifically to individual users and smaller electronics. This model is designed for basic use, such as providing backup power for personal computers, networking equipment, or smaller electronics. The APC 900’s standout features include user-friendly status indicators, fuse protection, and several outlets to ensure multiple devices can be connected simultaneously. Its compact size makes it particularly appealing for home environments where space is at a premium.

Each of these models leverages cutting-edge technologies including advanced battery management systems that prolong battery life and performance. They incorporate surge protection and noise filtering to safeguard sensitive equipment. In terms of physical characteristics, the UPS units are built with a focus on durability and ease of transport, featuring sturdy casings and integrated handles.

In conclusion, the APC 2000, 1250, and 900 models offer a range of features that cater to diverse power needs, ensuring reliable power protection and management for both personal and business applications. Their deployment of advanced technologies and user-friendly functionalities make them a preferred choice in the UPS market.