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Battery Capacity Formula:
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The Hochiki Fire Alarm Battery Calculator determines the required battery capacity for Hochiki fire alarm systems based on standby current and alarm current. This calculation ensures your system will operate properly during both normal and alarm conditions.
The calculator uses the following formula:
Where:
Explanation: The equation calculates the total battery capacity needed to power the system for 24 hours in standby plus 30 minutes in alarm mode, with a 25% safety margin.
Details: Proper battery sizing is critical for fire alarm system reliability. Undersized batteries may fail during power outages, while oversized batteries increase cost unnecessarily.
Tips: Enter the standby current and alarm current values in amps as specified in your Hochiki system documentation. Both values must be positive numbers.
Q1: Where do I find the standby and alarm current values?
A: These values are typically listed in the technical specifications of your Hochiki fire alarm control panel documentation.
Q2: Why is there a 1.25 multiplier in the formula?
A: The 1.25 multiplier provides a 25% safety margin to account for battery aging and temperature variations.
Q3: What battery type should I use?
A: Sealed lead-acid (SLA) batteries are commonly used for fire alarm systems. Consult your Hochiki documentation for specific recommendations.
Q4: How often should batteries be replaced?
A: Fire alarm batteries should typically be replaced every 3-5 years or as recommended by the manufacturer.
Q5: Does this calculator work for all Hochiki systems?
A: This calculator provides a general estimate. Always verify with specific product documentation as requirements may vary by model.