Section 18 – Final Power-Up Procedure
18-7
Battery Capacity Calculation Table
Using the total calculated from Table 4, calculate the battery capacity required for the
installation.
Capacity
Formula
Calculated
Value
Standby Capacity
For 4-hour standby time:
Total standby current X 4 hours X 1.4 contingency factor.
For 24-hour standby time:
Total standby current X 24 hours X 1.1 contingency factor.
Alarm Capacity
For 4-, 5-, or 15-minute alarm time
Total alarm current X 0.067 (4 minutes)
0.250 hours (15 minutes)
Total Capacity
Add standby and alarm capacities
Battery Selection Table
Use the Battery Selection Table to select the appropriate battery for the installation.
Capacity
Recommended Battery
Comment
4AH
Yuasa NP4-12
7AH
Yuasa NP7-12
12AH
Yuasa NP12-12
Fits in large mercantile cabinet only.
14AH
Yuasa NP7-12
Connect two in parallel
17.2AH
Yuasa NPG18-12
Fits in large mercantile cabinet only.
The standby battery is automatically tested for 10 minutes every 4 hours, beginning 4 hours after
exiting programming mode. In addition, entry into the Test Mode will cause a battery test to be
initiated. The VISTA-50PEN will also run a 5-second battery test every 60 seconds to check if the
battery is connected
Summary of Contents for VISTA-50PEN
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