User manual CONTAX TRACE METER REV D

[. . . ] Tr a c e M e t e r Battery Status Monitor 4. 55" BATTERY LEVEL % SELECT V A Ah RESET AMP HOURS REMOVED CHARGED INVERTER 0N/OFF INTRODUCING THE TRACE BATTERY STATUS MONITOR The Trace Meter battery status monitor features six data-monitoring functions and three indicators including: State of Charge/Amp-hour content: full or percent of capacity State of Charge/Voltage: real-time voltage level, historical high & low system voltage !Full charge indicator The Trace Meter works with 12-volt, 24-volt, and 48-volt battery systems (optional TM48 shunt board required for 48-volt systems). Copyright a Trace Engineering Co. 5916 195th Street, NE Arlington, WA 98223 USA Tel (360) 435-8826 Fax (360) 435-2229 www. traceengineering. com Part Number 3507 Rev B, January 11, 1999 Page !! 4. 55" BATTERY MONITORING SYSTEM 1 BASIC OPERATING FUNCTIONS The Trace Meter enables you to monitor battery state-of-charge, voltage, amps, and amphours used. [. . . ] This setting effects the Percent State-of-Charge meter. % SELECT % SELECT RESET RESET SELECT Copyright a Trace Engineering Co. 5916 195th Street, NE Arlington, WA 98223 USA Tel (360) 435-8826 Fax (360) 435-2229 www. traceengineering. com Part Number 3507 Rev B, January 11, 1999 Page 7 Setting the efficiency factor: If you do not know what efficiency factor to use, if you have lead-acid batteries start with 94%. If you find that after discharging and recharging your batteries that the amp-hours reading is somewhat below 000 (negative) when the Charged LED flashes (charge settings reached), then increase the efficiency factor. If you find that the numbers are substantially going above zero before the "charged" LED flashes, decrease the efficiency factor. Typically, try to adjust the efficiency so that when the "charged" LED flashes the amp-hour number is slightly positive. Amp Hours: Set your system's amp-hour capacity using the Setup menu under this mode. It is better to rate your system's capacity conservatively in order to avoid excessively discharging your system. Ah SELECT Ah SELECT RESET RESET SELECT Setting the battery capacity: The battery capacity setting should be adjusted to a value that is equal to or lower than the actual capacity. When a number that is lower than the actual capacity is used, the "%" battery state-of-charge will allow a more conservative use of the batteries and often the stated capacity numbers for batteries tend to be optimistic. Also note what temperature your battery capacity is rated, the amp-hour capacity of batteries will decrease at lower than rated temperatures. If batteries are connected in series, the capacity of the series string is equal to the value of the least capacity battery in the series. Setup for the Charged Indicator Use the settings described below to program the Charged indicator. Choose between voltage, voltage and current, or voltage and time as the criteria for activating the Charged indicator. A good rule of thumb - use voltage/amperage criteria unless the peak amps from your charging source is less than your fully charged current setting (battery capacity divided by 20 - C/20). V Voltage Criterion: To specify the full-charge voltage value, first press and release the Select button until the voltage (V) indicator is lighted, then press the Reset button while holding the Select button down. When the fullycharged criteria are satisfied, the `Happy Sun' LED will flash. For 48-volt systems, set the full-charge criterion above 35 volts, else the display value will be ½ of the actual voltage. For a 12-volt, liquid lead-acid battery bank, 14. 3 to 14. 8 volts is an appropriate full-charge voltage. For other battery types, refer to manufacturers recommendations. Copyright a Trace Engineering Co. 5916 195th Street, NE Arlington, WA 98223 USA Tel (360) 435-8826 Fax (360) 435-2229 www. traceengineering. com Part Number 3507 Rev B, January 11, 1999 Page 8 SELECT V SELECT RESET RESET SELECT A Voltage Alone: To specify voltage as the sole criterion, set the fully-charged voltage value first and then turn the amps criterion Off. Press Select to select the amps (A) indicator and enter the Setup menu by pressing the Reset button while holding the Select button down. The LED display will flash on and off displaying the present amps criterion value. Press the Reset button until `OFF' is displayed, then press the Select button to accept the value. SELECT A SELECT RESET RESET SELECT A Voltage and Current: To specify both voltage and current as the criteria, first set the voltage criterion, then set the current (amps) criterion. Press Select to select the amps (A) indicator and enter the Setup menu by pressing the Reset button while holding the Select button down. Press Reset until an "A" is displayed on the LED following a numeric value. [. . . ] If the pump is designed to maintain 12 PSI at 15 GPM, and a load demanding 20 GPM is connected, the pump will not be able to keep up and the pressure will get sucked down to some lower PSI. If the load is then reduced or removed, the pump will catch up and return to it's rated 12 PSI pressure. If the pump has an infinite source of water such as a lake or the water utility (this is like the grid, no battery) the pump will never run out of pressure, and as long as the pump is operated at or below it's 15GPM level it will hold 12 PSI. However, a pump that is connected to a water tank with a finite capacity, will start to lose the ability to hold pressure as the level of water in the tank drops. [. . . ]