Fairbanks H90-3052-D Fairbanks Scales - Manual (Page 10)

50144 Rev. 4
4.2. Specifications
INPUT VOLTAGE 115 VAC Standard Outlet
BATTERY OUTPUT VOLTAGE 7 VDC +/‐ 0.2 VDC at the end of charge cycle with battery connected.
LEADS  Output leads 18 AWG, approximately three feet (3’).
 Extended power cord up to six feet (6’).
STATUS L.E.D. Brightness sufficient to discern the charge status under general office
environment lighting.
CHARGING TIME
 Sixteen (16) hours maximum for undamaged chargeable battery
(electrolyte not depleted).
 Initial unloaded battery output voltage of 5 VDC.
OPERATING TEMPERATURE
RANGE
0°C to +38°C (+32°F to +100°F).
FACTORY MUTAL APPROVAL ULPI 9V SLA
C A U T I O N
BATTERY SURFACES GET
VERY HOT
while recharging.
4.3. States of Operation
STATE 1: NO BATTERY
 RED LED will be on steady.
 Used to indicate that no battery is
attached to the charger.
 No current is flowing from the charger
STATE 2: UNDER VOLTAGE
BATTERY
 RED LED flashes at a set interval.
 Indicates that a battery is attached to
the charger, which is below a 3.6V
threshold
– Charger will attempt a trickle charge
for up to sixteen (16) hours to
restore battery to normal state.
– If at the end of sixteen (16) hours,
the battery has not reached 3.6V,
the charger shuts down.
– The Yellow LED will come on with a
Red LED flashing, indicating no charge
is being generated in this state.

A small trickle charge is generated in
this state of about 10% duty cycle, or
about 60mA*.
STATE 3: CHARGING
 YELLOW LED will be on steadily.
 Indicates the battery is between 3.6V and 7V.
 Charger will continue charging for up to sixteen
(16) hours
– If charger has not reached the next state in
the sixteen (16) hours, it will determine
voltage.
▪ If the battery voltage is between 6.4V
and 7.2V, the unit switches to STATE
4: TRICKLE CHARGE.
▪ If the battery is not charged to 6.4V, the
charger shuts-down ,displaying a
YELLOW LED on steady with RED
LED flashing (used to indicate possible
fault with battery).
 Full charge is produced in this state is 200mA.*
* Current levels will vary between batteries and is only
given as a reference.
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