ADEMCO VISTA-128B Installation And Setup Gude page 103

Battery Capacity Calculation Table
Using the total calculated from Table 4, calculate the battery capacity required for the
installation.
Capacity
Standby Capacity For 4-hour standby time:
Alarm Capacity
Total Capacity
Battery Selection Table
Use the Battery Selection Table to select the appropriate battery for the installation.
Capacity
4AH
7AH
12AH
14AH
17.2AH
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-128B will also run a 5-second battery test every 60 seconds to check if the
battery is connected
Formula
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.
For 4-, 5-, or 15-minute alarm time
Total alarm current X 0.067 (4 minutes)
Add standby and alarm capacities
Recommended Battery
Yuasa NP4-12
Yuasa NP7-12
Yuasa NP12-12
Yuasa NP7-12
Yuasa NPG18-12
Section 18 – Final Power-Up Procedure
0.250 hours (15 minutes)
Comment
Fits in large mercantile cabinet only.
Connect two in parallel
Fits in large mercantile cabinet only.
Calculated
Value
18-7