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MX28B1200/2400 MX28B1200/4800 –48 VDC User’s Manual Page 58
Battery Temperature Test
If the battery teperature probe is used in this system, verify that the battery temperature is
correct.
LVD Test
1. Verify that the Battery Float voltage is set to negative (-) 54.00 Volts via the control panel
and verify the temperature compensation setting is at its default setting (disabled).
2. Enable the LVD’s that are installed.
Note: In single-bay systems, only LVD1 is used. In multi-bay systems LVD1 and LVD2
are used in parallel.
3. Ensure that the LVD parameters are set to proper value.
4. Install rectifiers and restore AC power.
5. Set the LVD Trip to –56.00 Volts.
6. The LVD should have dropped out (opened). Verify it by monitoring the voltage at the
battery connection.
7. Verify that the LVD Open Alarm is registered on the controller and at the customer
remote alarm panel.
8. Reset the LVD Trip to negative (-) 42Volts.
9. Verify that the LVD Open Alarm has been removed.
Battery Preventive Maintenance Procedure
The purpose of the preventive maintenance is to ensure that the battery is in good, working
condition. The observations, measurements, and tests performed are designed to determine
the “state of health” of the battery. It will also allow for the prediction of future performance and
preempt possible failure.
1. Measure the float charge voltage.
a. At the power bay bus.
b. At the battery.
c. Reset voltage if necessary.
2. Measure the float current on each battery cable. If it is fluctuating, measure maximum
and minimum.
3. Measure the AC ripple voltage at the battery.
4. Using an Alber Cellcorder, measure the float voltage of each cell or monoblock. Record
the battery memory location allocated on the Cellcorder.
5. Using an Alber Cellcorder, perform a load test on each cell or monoblock and measure
the internal cell resistance and inter-cell resistance of each cell or monoblock.
6. Measure and record the specific gravity of each cell using an individual hydrometer or
Cellcorder attachment hydrometer (VLA only).
7. Ensure that the electrolyte level is adequate. Add approved water where necessary (VLA
only).
8. Measure and record the temperature of the electrolyte of each cell (VLA only).