Tycon Power BATTMETER - Manual (Page 3)

3
TECH CORNER
Additional Information you may find useful
1. FUSE: The BATTMETER has an internal 20A fuse. The type is AGX-
20 or SFE-20 type. There is one screw in the top of the BATTMETER.
Remove the screw and carefully separate the cover from the base. Re-
place the fuse as necessary.
2. LIMITS: Don’t exceed 30V or 20A or the meters could be damaged.
3. MOISTURE: The BATTMETER is designed to be used indoors or
outdoors in a weatherproof enclosure. Avoid getting the BATTMETER
wet.
4. METERS: The meters used are self zero type. There is no zero ad-
justment provided on the meter pointer.
5. CURRENT (AMPS): When connected properly to a battery and pow-
er source/load, if the current shown on the meter is positive, then the
battery is charging and if the current is in the negative range, the bat-
tery is discharging.
6. BATTERY STATUS: Read the Voltage Meter. Multiply value in chart
x 2 for 24VDC battery systems. NOTE: These state of charge voltage
values are without any load on the battery. Disconnect any exter-
nal load before measuring battery voltage and applying this chart.
Battery voltage will rise substantially without load.
7. BATTERY LIFE: To extend the life of your batteries try not to dis-
charge more than 50% state of charge. Remember state of charge is
measured without any load on battery except the BATTMETER.
8. BACKUP TIME: Measure negative current on the A meter. If your
battery is a fully charged 100Ah battery and the current is –2A then that
battery should last about 50hrs (hours = Ah / current). If discharge to
50% only then 50/2 = 25 hrs till 50% state of charge is reached.
9. CHARGE TIME: Charge time is similar. A 100Ah battery at 50%
state of charge if charging with +2A should take about 25hrs to fully
charge.
State Of Charge Sealed or Flooded
Lead Acid
GEL Battery AGM Battery
100% 12.7+Volts 12.9+Volts 12.8+Volts
75% 12.4 Volts 12.7 Volts 12.6 Volts
50% 12.2 Volts 12.4 Volts 12.3 Volts
25% 12.0 Volts 12.0 Volts 12.0 Volts
10% 11.8 Volts 11.8 Volts 11.8 Volts