FIREFINDER SERIES II
INSTALLATION,
COMMISSIONING
&
OPERATION
Idd=
I Alarm ( Ia = Iq + Ida
– Idd ) = mA
Battery capacity at end of
battery life
=
( Iq x 24 ) + Fc( Ia x 0.5 )
NOTE:
=
Note: The figure of 24
above
should
be
replaced with 96 if
Agent Release is used
=
Note:
1,000ma = 1 Amp
Fc = capacity de-rating factor
AS 1670.1 states a factor of 2 is deemed
to satisfy the criteria.
=
Ah
New
battery
capacity
requirement
=
Ah x 1.25
=
Ah
Rounded
up
to
nearest
available
Ah
=
PRIMARY POWER SOURCE CALCULATIONS
Battery Charger Current
Requirement: Battery is charged for 24 hrs. to provide 5Iq + 0.5Ia
=
( 5x Iq ) + Fc( 0.5 x Ia )
=
=
Ah Requirement
=
Ah
Battery
Charging
Current
Required
=
Ah above
24 x
e
e
is the battery efficiency, 0.8
=
A
Power Supply Requirement
Select the greater of 1 or 2
1. Ia + non- battery backed ancillary alarm loads
2. Iq + non
– battery backed quiescent loads
If the power supply is used as the charger the current rating of the supply shall be [( 1 or 2 ) + battery
charger current ].