Battery Capacity 0 to 1200AH RS232 PC Interface TES-33S Battery Capacity  Tester  Update from TES-33          Features      Test Condition Without Shutting Down Battery.     Simultaneously Measure Battery Resistance, Voltage, Current, Temperature.     Auto-hold and Auto-data storage.     Comparator Function.     Rates Conditions as Pass, Warning, or Fail.     Memory and Read Function     Compact and Lightweight.     RS232 PC Interface         Storage Battery Systems Battery Capacity Testers,check battery condition in seconds, with the battery in service                  Specification:            Battery Types TestedCompact storage batteries, Alkali and lead-acid batteries..           Battery Capacity0 to 1200AH           Resistance           Ranges : 4mΩ, 40mΩ, 400mΩ, 4Ω, 40Ω, 400Ω           Resolution : 1μΩ , 10μΩ , 100μΩ , 1mΩ , 10mΩ , 100mΩ           Accuracy : 4mΩ±(2% reading ±8digits) 40mΩ~400Ω±(0.8% reading ±6digits)           Measurement Condition           Current : Approx. 40mA, 4mA, 400μA, 40μA, 4μA           Frequency : 1KHz±30Hz           DC Voltage           Range : 6V, 60V           Resolution : 1mV, 10mV           Accuracy : ±(0.1%rdg ±6digits)           Temperature           Range : -20 to 60 (-4 to 140)           Resolution :0.1 / 0.1           Accuracy : ±1 / ±1.8           DC Current           Range : 60A , 600A           Resolution : 0.01A , 0.1A           Accuracy : 60A : ±(2%rdg+20dgt) , 600A : ±(2%rdg+2dgt)           Open Circuit Voltage5V max           Manual Data Memory999 data sets           Continuous Data Memory6000 data sets (only use PC download)           Comparator           Setting : Resistance upper and lower limits and voltage           throughold limit.           Memory : 99 sets of values           Operating Environment0 to 40 (32 to 104), 80%RH or less, non-condensing.