P5
5
Models 1JYT9A, 1JYU1A, 1JYU2A and 1JYU3A
Westward Operating Instructions and Parts Manual
5
CHARGING TIME INSTRUCTIONS
1. Determine battery percent of charge
(or specific gravity) with hydrometer
or electronic tester.
2. Note specific gravity or percent of
charge on the following chart. Use
column nearest the Ammeter reading
observed.
3. Charge battery for the time indicated
on the chart. A more precise method
of determining length of charge time
requires the use of the following
formulas, the reserve Capacity or
Ampere Hour rating of the battery,
and the percent of charge needed to
bring the battery to full charge.
4. If the only battery rating known is
Reserve Capacity, you must first
convert it to Ampere Hours using the
following formula:
Example: Reserve Capacity of
Battery = 60 Minutes
5. With the battery Ampere Hour rating
and the percent of charge needed to
bring the battery to full charge, use
the following formula to determine
length of charge time of battery
selected on charger:
NOTE:
Express the percent of charge
needed as a decimal (25% = .25). Amp
output for charge rate settings: 12V
Low = 2 Amps, 12V Medium = 40 Amps,
6 or 12V High = 60 Amps.
Percent of charge needed = 25%
or .25.
6. Plug charger supply cord into 120V,
60 Hz, outlet, set charging rate
selector for ammeter reading closest
to chart column used, timer will shut
charger OFF when charging cycle is
complete.
CHARGER CONTROLS
MODELS 1JYT9A & 1JYU1A
Refer To Figure 7
The switch on the front of your charger
is used to select the voltage and rate of
charging. Listed below are the settings
and typical uses for each. (Clockwise
from top):
Hydrom-
eter
Reading
(Battery
Specific
Gravity)
Battery
Tester
Reading
(Percent
Charge)
6 Volt
Battery
Charging
Time
(Minutes)
12 Volt
Battery
Charging
Time
(Minutes)
Ammeter Reading
Full Charge
Full Charge
1.265
1.225
1.190
1.155
1.120
100%
75%
50%
25%
0%
27
55
85
110
60
15
35
50
65
20
45
65
85
400
800
1200
1600
60 40
20
=
+
15.5 45.5 Ampere
Amp
hour
Reserve
size of
Battery
=
Capacity (min)
2
+
15.5
6/12 V
START
12 V
HIGH
12 V
MEDIUM
12 V
LOW
6 V
HIGH
OFF
6/12 V
START
12 V
HIGH
12 V
MEDIUM
12 V
LOW
6 V
HIGH
OFF
MINIMUM
START
24 V
HIGH
12 V
HIGH START
OFF
12 V
MEDIUM
6 V
HIGH START
OFF
1JYT9A
Figure 7
1JYU1A
1JYU2A
1JYU3A
Operation
60
hour
2
Amp
Hour
Rating
Hours
To
Charge
x % of Charge
Needed
Amp Setting
x 1.25 =
=
.25 x 45.5
10
x 1.25
1.42 Hours
To Charge
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