EV3000
COMMISSIONING LOG BOOK
6 Battery Requirements
To calculate the battery requirements fill out the following
6.1 Calculating System Quiescent Current
Number of EWS zones † x 0.002 = (1)
† Total zones including those un-configured.
Number of EIS zones † x 0.002 = (2)
Main CPU current 0.8 (3)
E.C.P. current = Total of 1+2+3 = Amps
E.C.P. current x No of ECP's = (4)
Number of 40 W amplifiers x 0.06 = (5)
Number of 120W amplifiers x 0.17 = (6)
Number of WIP's x 0.06 = (7)
I
q
(Quiescent current) = (4) + (5) + (6) + (7) = Amps
6.2 Calculating System Full Load Current
Total speaker loading;
On the number of 40W amplifiers x 0.08 = (8)
On the number of 120W amplifiers _ x 0.065 = (9)
Visuals
Total number of VISUALS (pairs) x 0.25 = (10)
I
fl
(Full load current) = I
q
+ (8) + (9) + (10) = Amps
6.3 Battery Size Calculation
Battery size (minimum) = (I
q
x 24) + (I
fl
x 0.5) = AH
6.4 Battery Discharge Current
Use the values obtained previously in the formula below to calculate the discharge current.
Battery discharge current I
dis
= Amps
6.5 Battery Information
Obtain the following information from the battery manufacturer direct:
Recommended Replacement Date / /
Recommended Float Charge Voltage VOLTS
Maximum Discharge Capability At 1.5 Hour Rate (I Dis) Amps
Recommended Terminal Voltage When Discharged At (I Dis) VOLTS
As a final check ensure that the battery charger output is set at its recommended voltage.