ApcUpsD

Official Manual: http://www.apcupsd.com/manual/manual.html

Taken from http://www.apcupsd.com/manual/manual.html#resetting-the-ups-battery-constant

In some cases none of the battery runtime calibration methods result in the UPS reporting a reasonably correct battery runtime. It has been speculated that this is because the battery constant value has drifted so far from normal that the microprocessor in the UPS cannot correct it.

The good news is that if you are located in the USA, all you have to do is contact APC Technical Support and they will send you a serial port dongle which plugs into the serial port of your UPS and reprograms the battery constant value for you to the correct value.

The bad news is that for many users outside the USA, this service does not appear to be available. It is, however, recommended that you first try contacting APC Technical Support to verify the correct battery constant value. The APC representatives in the Support Forum on the APC website are also very helpful in this regard.

If all else fails, the information below is for you.

WARNING: Only the values for the Smart-UPS 700 model SU700 and Smart-UPS 1400 model SU1400, both with international firmware (and therefore international voltage), have been verified. YOU, gentle reader, USE THIS INFORMATION AT YOUR OWN RISK in the full knowledge that you may render your UPS inoperable and perhaps irreparable, and you will have no-one to blame but yourself. Caveat Utilitor!

The battery constant is the hex number in the column labelled “0”, presumably for register 0, in the following table:

UPS Model 4 5 6 0 Hex Firmware SU250 EE F8 B1 SU400 EE F8 9F E1 SU600 EA F4 9F E5 SU900 F3 FC 9F ED SU1250 EE FA 9F F5 SU2000 F1 F9 9F FD SU450,700 28 F2 FA 96 07,RM=47 52.11.I SU450XL,700XL 28 EE F8 9F 700XL=27 51.9.I SU1000,INET 35 EF F9 A0 0B 60.11.I SU1000XL 34 EE FC 9A 2B 61.9.I SU1400 35 EE FC 9A 70.11.I SU1400RM 28 ED FA 89 SU1400R2IBX135 08 B4 10 A3 SU1400RMXLI3U 45 F6 F4 80 73.x.I SU1400RMXLI3U 20 F3 FD 81 73.x.I SU2200I 35 EE FB AF 90.14.I SU2200XL,3000 35 EE FB AF 3000=17 90.14.I SU3000RMXLI3Ublk 35 F3 F4 AF 77 93.14.I SU5000I white 20 F2 FA 91 1F 110.14.I SU1400XL,XLI,RM 45 F6 E4 80 SU420I 25 95 09 85 16 21.7.I SU420SI 0E 95 0A 8C SU620I 29 99 0B 8A 1A BP420SI 0E 95 0A 8C 06 11.2.I BP650SI 10 97 0C 91 0A 12.3.I Power Stack 250 0C 95 0F B2 26.5.I Power Stack 450 0D 96 10 99 36 26.5.I SC250RMI1U 0C 95 0F B3 32 735.a.1 SC420I 0E 95 OA 8C 16 725.1.I SC620I 10 97 OB 99 1A 726.x.I SC1000I 08 95 10 94 8A 737.x.I SC1500I 07 95 14 8F 1E 738.x.I SU1000XL 17 EE F9 D5 MATRIX 3000,5000 E9 F5 B0 SU700RMI2U 07 B1 0D 92 8A 152.4.I SU1000RMI2U 08 B5 0D C7 8E 157.3.I SU1400RMI2U 08 B4 10 A3 92 162.3.I SUA1000I 07 B5 13 BC 0A 652.12.I SUA1000XLI 0B BD 0F 7F 4A 681.13.I SUA750XLI 0A B9 0C 86 46 630.3.I SUA750I 04 B6 14 82 06 651.12.I SUA750RMI2U 07 B1 0D 82 86 619.12.I SUA1500I 09 B9 13 A1 0E 601/653.x.I SUA1500RMI2U 08 B4 10 A1 8E 617.3.I SUA2200I 08 B8 12 B3 26 654.12.I SUA2200RMI2U 09 BC 11 81 A6 665.4.I SUA2200XLI 0A B7 0F 7F 66 690.x.I SUA3000RMI2U 04 B9 0E 70 AA 666.4.I SUA3000RMXLI3U 0A B6 0E 89 xx xxx.x.x SUOL1000I 06 B6 1B A6 SUOL2000XL 0D BD 14 75 52 416.5.I SURT1000XLI 0A BB 19 A8 4E 411.x.I SURT3000XLI 06 B6 0F CC 56 450.2.I SURT5000XLI 05 BA 15 86 5A 451.13.W SURT7500XLI 03 BB 20 97 63 SURT10000XLI 06 B8 19 AB 476.12.W SUM1500RMXLI2U 03 B7 0D A5 62 716.3.I SUM3000RMXLI2U 03 B7 0D A5 6A 715.3.I BP500AVR 26 17.1.I The instructions for resetting the battery constant are as follows:

Shutdown the apcupsd daemon; Run apctest; Choose option 6 to enter terminal mode; Enter Y (UPS should respond SM); Enter 1 (one, not el; wait 4 seconds); Enter 1 (one, not el; UPS should respond PROG); Enter 0 (zero, not oh; UPS should respond with current constant); Write down the existing value so that if something goes wrong, you can at least put it back to that value; Enter + (plus) or - (minus) to increment/decrement the value; Enter R to reprogram constant value (UPS should respond Bye); Enter Y (UPS should respond SM); Enter 0 (zero, not oh; UPS should respond with the new constant); Enter Esc to exit terminal mode; Choose option 7 to exit apctest.