Tech corner – Tycon Power BATTMETER User Manual

Page 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

10%

11.8 Volts